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Imsi number check 2. What is an IMSI Number? It is a global identity of the SIM card. Users can input a mobile number to access details like the owner’s name, address, and network operator. Jun 29, 2021 · We need to start defining what IMSI means. IMSI numbers are associated with mobile networks, both GSM (Global System for Mobile Communications) and UMTS (Universal Mobile Jul 6, 2025 · Can I change my IMSI number? <pIn general, users cannot change their IMSI number, as it is linked directly to the SIM card and managed by the mobile network operator. Use our CARRIER LOOKUP TOOL in order to make sure that your phone number is using Nepal Telecom network. It identifies every mobile phone subscriber on a UMTS or GSM network. Select the Change device link at the top, then choose your device. This can be used to determine the home country of the operator that issued the SIM card. Companies offering mobile services and IoT applications need the IMSI to ensure secure and reliable communication between devices and networks. Use our free IMSI lookup tool to instantly find the carrier and country associated with any IMSI number. Run a quick check to know essential information about your smartphone. Androids can have different locations for the SIM card. Jul 24, 2024 · The IMSI number is one of the most important identifiers assigned to your phone. SHOW EXAMPLE 65550 IMEI checked today 2537700 IMEI checked last week How to check IMEI? It amazes how quickly and easily you can check the IMEI number via our services. The IMSI is a unique identification number associated with a mobile subscriber. As the SIM card moves from phone to phone, the IMSI remains with the phone, but the IMEI remains with the handset. In the case of analog cellular network, the MSIN was used to route the call. In the box to the left of “Search”, enter the ICCID, customer name, Device Name, End Consumer ID, Customer, IMSI, Division, Company or Asset Type, then click Search. IMSI (International Mobile Subscriber Identity Check your IMEI Effortlessly Enjoy our user-friendly IMEI lookup service which gives you full direct access to the most comprehensive IMEI mobile data source in the world. It is securely stored and sent by your device to your network in order to identify you. The MS is having several identifiers that is used while communicating with the network, those identifiers are the IMSI, MSISDN, IMEI, P-TMSI. Ensure your phone is unlocked with our fast, accurate, and free IMEI SIM lock checker. To prevent eavesdroppers from identifying and tracking the subscriber on the radio interface, the Analysis of SIM card numbers All mobile phone SIM cards have each been assigned a unique SIM card number. The label is on Dec 29, 2023 · The International Mobile Subscriber Identity (IMSI) is a unique identifier associated with all Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS) network mobile phone users. Run a Free Samsung IMEI check online to verify your Samsung IMEI number or serial number. Enter the mobile number, submit your query, and instantly view the owner’s details, including their name and registration information. Moreover, this USSD code also lets you display all user statistics as shown in the screenshot below. g Check Info for FREE for your IMEI | MEID | SERIAL | ESN Number. Oct 14, 2025 · How to check and decode IMEI/MEID Number? To help you to obtain detailed information from an IMEI (International Mobile Equipment Identity), or MEID (Mobile Equipment ID) number, FYIcenter. Aug 31, 2015 · A few months ago, the number 1 iPhone unlock website, aka Unlockboot, introduced a free IMEI checker with simlock status. This is the 15-digit number that recognizes the carrier your phone is using. Let’s find out how useful the checker that we designed especially for the devices that are provided by the AT&T carrier. ICCID stands for Integrated Circuit Card Identification Number. Each IMSI is stored on a mobile device's SIM card and consists of up to 15 digits. ” If you don’t see a 19-digit number under either of these two options, turn off your Android and remove the SIM card. An IMSI includes three components: Three-digit Mobile Country Code (MCC), three-digit Mobile Network Code (MNC) and nine-digit Mobile Station Identification Number For example, MCC = 310 (USA) and MNC = 410 (AT&T) results in a PLMN of 310410. It stands for International Mobile Subscriber Identifier. However How our carrier check by IMEI works An IMEI (International Mobile Equipment Identity) number is at the heart of our carrier check. Feb 24, 2023 · To retrieve your SIM card number (ICCID) number, begin from the home screen: If your phone will not power on, you can simply get the SIM card number by ejecting it from the SIM slot or by pulling it out from a tray on the phone. Dec 18, 2019 · Note: IMSI number is available on the packet of sim card, when It is initially bought from a store. On your device, select Settings. This is a unique identifier that defines a subscriber in the wireless world, including the country and mobile network to which the subscriber belongs. All Brands & Devices supported, including Apple | iPhone | Samsung | Oppo | Xiaomi | OnePlus. How to Check How our carrier check by IMEI works An IMEI (International Mobile Equipment Identity) number is at the heart of our carrier check. Sometimes rather than IMSI number, the device sends TMSI (Temporarily generated code for mobile subscriber identity). Since the HNI identifies the country and network, combining it with the MSIN (Mobile Subscriber Identification Number) results in the unique ID for a mobile subscriber, called the IMSI. All phones supported! Learn about the International Mobile Subscriber Identity (IMSI), its significance in mobile networks, user authentication, roaming, and fraud prevention. Check your IMEI number and get access to warranty date, carrier info, blacklist status, purchase date, blockade info and more. Meanwhile, the IMSI number itself is a number that interestingly recognizes each client of a cellular arrangement. May 7, 2015 · Filter all traces for a particular IMSIOne Answer: Use out database and check out if your device will be locked or unlocked in Nepal Telecom. This globally unique number is essential for identifying and authenticating subscribers across mobile networks worldwide. Each serves a unique function: the ICCID identifies the physical SIM card, while the IMSI identifies the line within the operator's network. This is especially handy when you’re buying a phone from another individual. IMSI is commonly used to identify SIM on mobile networks. With our easy on-line analysis tools you can now find out all there is to know about worldwide phone numbers, network IMSI numbers, handset IMEI codes, SIM card numbers, as well as international signalling point codes. What's IMSI and how can I check the IMSI Nokia thing? I had charges on my phone and the email support person asked me for this. IMEI Carrier Lock Check The IMEI Carrier Lock Status checker will show you if your Apple iPhone is Carrier Locked or permanently unlocked for use with a different carrier. The ICCID stands for Integrated Circuit Card Identifier and is used to identify a SIM card internationally. Is there any adb command or any shell command in android for this??? I tried adb shell getprop ril. Apr 9, 2025 · How to Check IMSI Number in iPhone? While this guide thoroughly covers how to find the IMSI number on Android phones, iPhone users can also find their IMSI number through these steps. The IMSI can be used to transfer from one device to another, unlike the IMEI which only has a few digits. Comprehensive database of Mobile Country Codes (MCC) and Mobile Network Codes (MNC). What is IMSI The International Mobile Subscriber Identity (IMSI) is a unique identifier used in mobile networks that connect to other networks. The article will display with directions for your specific phone. Nov 7, 2025 · How to check and decode SIM Card Number? To help you to obtain detailed information from the SIM (Subscriber Identity Module) card number, FYIcenter. Apr 6, 2023 · IMSI Code List IMSI Stands For IMSI stands for International Mobile Subscriber Identity, and it is a unique identification number assigned to a mobile device by a network operator. Quickly check SIM lock status using IMEI. Protect yourself from buying or using stolen or blacklisted devices! All Brands / Devices supported, including Apple, iPhone and Samsung. Additionally, sometimes you may need the IMEI or serial number to redeem special May 16, 2025 · Using this code, you can find network-related information like IMEI number, phone number, IMSI number, network region, roaming status, data network type, signal strength, download and upload bandwidth in KBPS, etc. The IMSI identifies a specific GSM subscriber, in other words. S. Let’s find out how to check ESN, MEID and IMEI Number. The ICCID (Integrated Circuit Card Identifier) can be thought of as the serial number of the card itself whereas the IMSI (International Mobile Subscriber Identity) is analagous to an account number for the mobile subscriber. Why should you check IMEI numbers? When you enter a number into a service like Swappa’s IMEI checker, you can confirm that the number is tied to the device described. Feb 12, 2023 · An IMSI is a unique number that is attached to a SIM card and is used to identify the subscriber and the services assigned to him/her. This unique, 15-digit international identifier, which is included in a mobile device, allows for roaming on mobile service provider networks. The The international mobile subscriber identity (IMSI; / ˈɪmziː / IM-zee) is a number that uniquely identifies every user of a cellular network. In layman’s terms, the ICCID can be described as the serial number or ID of the SIM card. As you know, an international mobile identity, or IMSI, is a unique ID number associated with a mobile phone user. IMSI is a combination of PLMN and Mobile Subscriber Identification Number (MSIN). Stored as a 64-bit field, it’s sent by the mobile device to the network and is used for acquiring other details of the mobile in the home location register (HLR) or as locally copied in the visitor location register. Hence, there are three methods to find your IMSI number on an Android phone. Below you can enter a SIM card number to check its validity as well as find out more about the mobile network that issued the chip. The easiest way to know your IMSI number is to access imei. It is also used for acquiring other details of the mobile device in the home location register (HLR) or as locally copied in the visitor location register. It is a unique number that identifies your SIM card within your mobile network operator and has nothing to do with your mobile phone model. Use Device help. To check for IMEI from your phone Sep 30, 2024 · We will also discuss how to find IMSI on your phone and its differences with IMEI. 310 for USA, 505 for Australia) MNC = Mobile Network Code (e. This information can be used to find the network for your phone. The device information populates. IMSI is a 15-digit number that identifies a mobile phone subscriber within a network. In case there is an MS that is having Dual SIM, every SIM is having its own IMSI, MSISDN, IMEI, and P-TMSI. Dec 26, 2021 · The IMSI number of the SIM is a series of identification numbers that you must know. Apr 9, 2025 · Accessing the IMSI number is quite an easy process, as it is usually stored in your SIM card. Today, we found a way that can help you to check the original carrier of your iPhone using your Original IMSI number, and this will help you to decide what to do with your locked iPhone. It has the format MCC-MNC-MSIN. Check Apple/iPhone IMEI/Serial Number and find out Full info about your Apple Device. The IMSI number has up to 15 digits and consists of three parts: The first three digits are the Mobile Country Code (MCC). The IMSI is stored in the Subscriber Identity Module (SIM) inside the mobile device and is used to identify the user Feb 22, 2024 · Discover what you need to know about ICCID, IMSI and IMEI and why these terms are important for your global deployment. Demystifying IMEI, IMSI, and TMSI in GSM networks. What is the use of IMSI? We would like to show you a description here but the site won’t allow us. Do you wish to buy a phone locked by the ATT network? In the article below, you will be able to check out how to verify the device by using our special AT&T IMEI Check Service. Additionally, we will provide a step-by-step guide on how to check your phone's IMSI. It is important to understand the differences between the IMSI number and the SIM number Apr 25, 2015 · How it works: Your own iPhone sends IMSI number to the current network while registering. Dec 4, 2024 · You can check the owner of a SIM card by visiting IMSI DATA. By using our free lookup function you can get access to hidden info about iPhone, iPad, iPod, MacBook, iWatch and more. Checks Model, Color, Capacity, Coverage, Activation Status, Replaced Status, Apple Blacklist, Carrier, SimLock, Find My iPhone, and more pro info for FREE. Oct 17, 2025 · IMSI: The central subscriber identification in mobile networks explained The IMSI number uniquely identifies every mobile subscriber within a network. If you'd like to find out whether your device is going to work with Nepal Telecom (Nepal), please check the details below: IMEI Calculator The last number of the IMEI is a check digit. Instantly confirm warranty status, GSMA blacklist, carrier lock, sales region, and model number in one detailed report. What Is IMSI IMSI stands for International Mobile Subscriber Identity. Search and find detailed information about mobile operators worldwide. SIM card, IMSI, IMEI, ICCID and MSISDN background on Mobiles MSISDN IMSI = International Mobile Subscriber Identity. Dec 5, 2023 · Understanding IMSI: International Mobile Subscriber Identity The International Mobile Subscriber Identity (IMSI) is a unique identifier assigned to every mobile subscriber in a cellular network. Use our CARRIER LOOKUP TOOL in order to make sure that your phone number is using AT&T network. Use MCC-MNC. Please enter your IMEI number and check for yourself. This can help in filing an insurance claim or police report if your phone is lost or stolen. com. Can we find IMSI number of lost phone? Check the answer below. It is stored on the phone's SIM card and is used to identify users and plan the phone's network. IMSI Data ensure accuracy and reliability, making the process simple and secure. The IMSI can have a maximum length of 15-digits. Enter your Apple IMEI and Serial Number and Check your iPhone Carrier for FREE. Get Apple iPhone 15 Pro Max support for the topic: Find IMEI, Serial Number & EID. Oct 31, 2024 · An IMSI is not the same as a telephone number. Based to this number we can provide additional information, about your device. Each IMSI is a unique code. g. Understand their roles in device identification, subscriber management, and mobile security. Get detailed information about your smartphone. Find your phone’s IMEI, IMSI, ICCID, and MSISDN codes easily. A typical SIM card (mini-SIM with micro-SIM cutout) A SIM card or SIM (subscriber identity module) is an integrated circuit (IC) in the range of a 25 MHz 32 bit CPU, and 256 KB of NVM. com has designed this online tool. It is a 64-bit code found on your phone's SIM card. 1. info and enter your operator code. To prevent Jan 28, 2017 · Finally, I found instructions for displaying IMSI when you dial “* # 0 6 #” which did display a number! The same site seemed to be saying the IMSI and IMEI/MEID codes were functionally equivalent numbers for Android and iPhone, respectively, but I’m not sure if that’s right. Mar 18, 2024 · Let us look at 7 ways you can use to find the IMEI number of your Android phone, regardless of whether you have the device or not. We'll walk you through how to find th Mar 17, 2022 · The IMSI country code is part of the IMSI number that can be tracked. We would like to show you a description here but the site won’t allow us. MSISDN is your phone number in international format, used by carriers to route calls and texts. A unique code, this 15-digit number links up with detailed information about a specific device (including carrier info). To Summarize The specific codes IMEI, IMSI, ICCID, and MSISDN, recognize a smartphone user within a phone service. The IMEI identifies the device, and the MSISDN corresponds to your phone number, both of which are essential for managing and securing your Enter your Apple IMEI and Serial Number and Check your iPhone Carrier for FREE. This number helps mobile networks identify users, manage accounts, and maintain connectivity across different regions. It identifies the modem embedded within the unit. Apr 17, 2025 · Here are four ways to find your device IMEI: Dial *#06# on your device. Use out database and check out if your device will be locked or unlocked in AT&T. The IMSI of European countries always starts with the number 2. Check IMEI Number and find out hidden info. see more information about the number here. How can I get IMSI code or something else for its identification? Kind regards and hope for a help! [Edited by Moderator] IMEI check - Get to know your phone better Every device has a unique 15 digit IMEI number. The IMSI is programmed into the SIM when it is manufactured and reflects the unique identification of the mobile subscriber account. Get MCC, MNC, and subscriber details quickly. How to check Smart coverage? How to check if your phone will work in Philippines? Those information will help you figure out if your device will work in the Smart roaming. It plays a crucial role in the authentication and identification process within mobile networks. The IMSI identifies the subscriber on one SIM card. May 24, 2024 · What is the IMSI Number? | its components, how it differ from other identifiers The International Mobile Subscriber Identity (IMSI) is a unique number tied to a mobile network subscriber. The carrier lookup is the best way to extract the carrier from the phone number. You can use the following command to check the records. The IMEI (or MEID) and serial number are two forms of identification for your Galaxy phone or tablet. The ICCID consists of 19 to 20 characters. IMSI command in Samsung Ga May 5, 2024 · Learn the difference between MSISDN and IMSI mobile numbers, and why a SIM card provides stronger security for customer authentication. An IMSI generator is a tool that can be used to generate IMSI numbers. Smoothly discover secret information. Verify the authenticity of your device with our IMEI Checker. Every SIM card does come with the ICCID printed on the physical SIM card. You’ll find the IMEI on the label. Check the recorded SIM card IMSI number When a SIM card is activated, FortiExtender records the IMSI number of the card. IMSI DB provides fast, secure, and free access to SIM ownership, CNIC details, and utility bills. How to check AT&T coverage? How to check if your phone will work in United States? Those information will help you figure out if your device will work in the AT&T roaming. Sep 30, 2024 · We will also discuss how to find IMSI on your phone and its differences with IMEI. Learn how to find, use and protect your IMSI number, and how it differs from IMEI and TMSI. Learn how MSISDN differs from IMSI and ICCID, where it’s stored on your SIM, and how secure mobile services like Efani protect it from SIM swap fraud. Jul 25, 2023 · Furthermore, the IMSI number is stored in the SIM card memory itself. During most of the contact with the mobile phone, the network employs a temporary number known as Temporary Mobile Subscriber Identity, or TMSI, to ensure the confidentiality of the mobile user. The Sep 30, 2024 · We will also discuss how to find IMSI on your phone and its differences with IMEI. Our Efani guide shows iPhone & Android steps to check device, SIM, and subscriber details for security, unlocking, and fraud prevention. Then, select General or About. Dec 22, 2018 · IMSI i want to known my sim imsi number on my i phone 7 iPhone 7 Posted on Dec 22, 2018 4:36 PM ⚠️ (8) Jun 10, 2023 · The IMSI is a unique number that identifies every user of a cellular network. The analysis of telephone numbers process is very easy and fast! So let’s perform phone number verification and validation requests with our validation tool. Use our CARRIER LOOKUP TOOL in order to make sure that your phone number is using Smart An international mobile subscriber identity is a unique number that identifies every user on a cellular network. The MSIN identifies a mobile subscriber within a PLMN. These identifiers help ensure that your device isn't counterfeit and can also help you find it if it's lost or stolen. IMSI is associated almost exclusively with Android-based cell phones, and is the functional equivalent to IMEI and MEID codes used across different cell networks to identify telephony Oct 22, 2021 · Track IMSI Number can be done by yourself if you know the way to identify it. All mobile phone subscribers are assigned a unique 15-digit IMSI number to allow foreign mobile networks to identify subscribers from abroad. IMSI stands for International Mobile Subscriber Identity; it is an identification code used to individually represent cell phones on the GSM and UMTS networks. . But if the user ports the MSISDN (Mobile Station International Subscriber Directory Number) to another SIM card, you will get a different (unique) IMSI number assigned to that new SIM. What’s included in a free IMEI check? With your device IMEI number, you can check device information such as phone brand, model, type and manufacturer and detailed technical specifications ahead of unlocking your phone. Check Serial Number Info in Apple device. Where do I see it? Feb 11, 2013 · I want to get IMSI number of SIM of Android phone using command line. MCC = Mobile Country Code (e. Nov 28, 2024 · One such number is the SIM IMSI number, which allows your device to connect to a cellular network. The My Verizon website displays device info like the mobile number, SIM ID, and device ID (IMEI). The International Mobile Subscriber Identity, or IMSI, is a unique number assigned to every mobile phone used by cellular networks to identify valid devices and allow them to be connected to the network. If you change the SIM in the phone, it has no impact on the IMEI number. Recently, Apple stopped giving free information about iPhone carriers. Nov 1, 2017 · IMSI and ICCID Prefixes GSM and 3G SIM cards are configured with two identifiers: an ICCID and an IMSI. Handheld Direction Finder GSM direction finder can be deployed with an IMSI catcher to determine the location of the suspect. Oct 21, 2019 · Is there any way to view IMSI and ICCID numbers of my SIM-cards? I didn't find such menu neither in About-Status nor anywhere else. Pakistan's trusted online platform. Mar 18, 2025 · The IMEI number is used during manufacturing, assisting carriers and manufacturers in tracking the device. [1] SIMs are intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices (such as May 23, 2018 · How to get IMSI number programatically? I need a way to verify an iPhone still have the same SIM (and it is active) I guess the only secure way is checking the IMSI, how can I get it? Is there another way? Thx in advanced. Learn about the International Mobile Subscriber Identity (IMSI), its significance in mobile networks, user authentication, roaming, and fraud prevention. telecommunications industry, oversee the Apr 14, 2020 · Let’s check out how the three numbers are different from each other. [1] It is stored as a 64-bit field and is sent by the mobile device to the network. Jun 6, 2021 · Hello! I lost my iPhone XR and I need to write a statement to the police. identify and authenticate The IMSI is used to identify and authenticate the subscriber on the mobile network. Get instant info on your device's Status, Blacklist, SimLock, Model, Specs, Warranty and more IMEI Info for FREE. Enter Find the IMEI and serial number in the search bar. Check hardware specification, warranty or BLACKLIST status and more for FREE. Additionally, you can take advantage of services such as Swappa’s IMEI blocklist check to see if the iPhone or Android device is allowed on all In this video, we’ll explain what ICCID and EID mean and why they’re important for understanding your SIM card details. It is a 15-digit code consisting of a type allocation code (TAC), a serial number, and a check digit. Find more step-by-step device tutorials on att. Apr 10, 2024 · Find the IMSI in Android IMSI stands for International Mobile Subscriber Identity. But can this IMSI number also track or locate your phone? This guide will help you determine how to check the IMSI number and unravel the best ways to track or locate a missing phone. This service provides information about the network in which the Apple device is locked and sim-lock status (locked or unlocked-simfree). Your SIM card's ICCID determines what cellular networks your device can While the ICCID identifies your SIM card, IMSI identifies the specific how cellular connectivity works with the Internet of Things, check out our guide to Get in touch and learn more the employed cryptographic algorithms, since the encryption keys are in the IMSI is commonly used to identify SIM on mobile networks. Mar 29, 2019 · Find the SIM card number under “ICCID” or “IMSI number. Number analysis tools It can be difficult to determine the exact meaning of various digit sequences. Sep 20, 2019 · —Short video to summarise what IMEI, IMSI, ICCID and MSISDN numbers mean— IMEI vs IMSI vs ICCID vs MSISDN IMEI stands for International Mobile Equipment Identity, and it is a 15-digit number that is linked to the mobile phone or any other cellular device. Learn what an IMSI number is How it differs from IMEI, and how to check and find your IMSI code easily. IMEI is short for International Mobile Equipment Identity and is a unique number given to every single mobile phone, typically found behind the battery. Getting IMEI, IMSI, and ICCID Numbers This webpage was last updated on Apr 26, 2024 To view the various ID numbers related to the SIM card and modems: IMEI (International Mobile Equipment Identity) number – A unique 15-digit number that identifies a cellular device within a mobile network. Check your IMEI number for free and uncover vital info about your device, including blacklist status, warranty, and hardware specifications. About IMSI An IMSI is used in any mobile network that interconnects with other networks. And the paging is continued till the location is detected on the direction finder. IMSI number allows network hardware to recognize the subscriber, to prevent the interception IMSI is sent as rarely as it’s possible. Below you can check the subscriber's home network, provided you know the IMSI. Just like fingerprints for people, these two numbers are different for every phone and tablet. Over 110 mln checked IMEI's in our database. The Check Digit is calculated according to Luhn formula. Viewing a SIM’s status using the AT&T Control Center Web Portal Click Devices. The user chooses the channel number on the IMSI catcher for paging. Click the blue link below “SIM #” or “Month to Date Usage (MB Jun 3, 2025 · The IMSI and ICCID are essential codes on the SIM card that identify both the user and the chip on mobile networks. net for browsing and searching of MCC, MNC, PLMN, or TADIG codes for From cleaning your database of fake phone numbers, real-time number portability checks, to SIM swap fraud detection, Number Lookup is the tool you need. The IMEI is a unique number provided to every mobile device, IMSI is provided to each mobile subscriber via the SIM card, ICCID is assigned to each SIM's hardware, and MSISDN refers to the complete mobile phone number. TO CHECK FOR IMEI by Dailing *#O6# from your KEYPAD. But what exactly is this cryptic string of digits, and why does it matter? As an experienced tech writer, I’ll walk you through everything you need to know about IMSI numbers in this comprehensive guide. Check the carrier including T-mobile / Verizone / ATT and the rest of the world. The TAC identifies the model and origin of the device, while the serial number provides a unique identifier for each cellular based device. Check IMEI/SN. Dec 4, 2024 · A SIM database online tracker is a digital tool that provides information about SIM card ownership, network details, and real-time tracking. Use out database and check out if your device will be locked or unlocked in Smart. IMSI is a 15-digit code that identifies your SIM card and mobile network. This tutorial explains the IMSI Number format and other details. How to Check The IOC will maintain and ensure compliance with the IMSI Assignment and Management Guidelines and Procedures and the International Mobile Subscriber Identity (IMSI) Assignment and Management Guidelines for Shared HNI For CBRS Range documents to ensure that they meet the evolving needs of the U. The number consists of up to 15 digits. All phones supported! Mar 18, 2024 · International Mobile Subscriber Identity, IMSI, is a unique number automatically generated and stored in the SIM. The page defaults to the “Device List”. IMSI Structure and Format An IMSI is a 15-digit number (though some older Dec 12, 2024 · Mobile Subscription Identification Number (MSIN): A unique number used to identify the subscriber; 9–10 digits How to check the IMSI number of IoT devices Here’s how to check the IMSI number (a lot will depend on the device and provider): Device settings: Most cellular-enabled IoT devices store the IMSI in their settings.