ICCID Number: What It Is, Format, and How to Find It (iPhone & Android)

ICCID number is a unique code assigned to every SIM and eSIM, serving as a digital fingerprint that identifies your SIM card on mobile networks. Understanding how it works, where to find it, and what it’s used for can help you manage connectivity, activate devices, and troubleshoot mobile issues more efficiently-especially in the world of eSIMs and IoT.

What is an ICCID number?

The ICCID number, short for Integrated Circuit Card Identifier, is a unique string of digits assigned to every SIM card. This number helps mobile networks and devices identify and manage each SIM across the globe. Whether you're using a physical SIM or an eSIM, the ICCID number plays a key role in tracking and authenticating your mobile connection.

The ICCID number format

The ICCID is defined in ITU-T recommendation E.118, with a layout based on ISO/IEC 7812 (the standard behind payment card numbers). E.118 allows up to 19 digits including a check digit, while the original GSM specification reserves a 20-digit field, so in practice most ICCIDs are 19 or 20 digits long (some guides quote 18 to 22). Every one starts with 89. The parts are:

• Major Industry Identifier (MII): always 89, meaning telecommunications.
• Country code: 1 to 3 digits based on the international calling code.
• Issuer identifier: 1 to 4 digits for the operator that issued the SIM.
• Individual account identification: the digits that make this SIM unique.
• Check digit: the last digit, used to catch typing errors.

The first three parts together form the Issuer Identification Number (IIN), which is at most seven digits.

What do the numbers in an ICCID mean?

Reading an ICCID from left to right:

• 89: the telecom industry code, on every SIM and eSIM.
• Country code: taken from the international calling code, with a few tweaks so it fits the format. US SIMs use 01 (a zero in front of +1) and Canada uses 302, so an American ICCID begins 8901.
• Issuer code: identifies the operator.
• Account digits: tell one SIM apart from every other SIM from that operator.
• Check digit: confirms the number is valid.

The final digit is calculated with the Luhn algorithm, the same formula used to validate credit card numbers. If even one digit is mistyped when an ICCID is entered by hand, the check digit no longer matches and the system rejects it before anything is activated.

What is the ICCID number used for?

The ICCID number is more than just a label - it's essential for network operations, device tracking, and managing global SIM connectivity. Below are the main ways it's used.

SIM card identification

The ICCID identifies the SIM card or eSIM profile itself. Operators use it to track each card in their inventory, to activate it, and to link it to an account. Day-to-day routing and billing run on other identifiers: the IMSI (the subscriber identity stored on the SIM) and your phone number.

Device activation and user management

Mobile devices and platforms often rely on the ICCID to activate a SIM and link it to a user profile. This enables accurate assignment of data plans, phone numbers, and usage limits.

Troubleshooting and remote diagnostics

When issues arise with connectivity or SIM performance, the ICCID helps technical teams pinpoint the affected card. It's used in diagnostic tools to run tests and deliver remote support, especially in IoT deployments.

Security and compliance in IoT

In enterprise or IoT environments, the ICCID number helps enforce security policies. It allows administrators to monitor, authenticate, and block SIMs that show suspicious activity or no longer comply with regulations.

Does the ICCID affect roaming?

Not directly. When your phone connects to a network at home or abroad, the network authenticates the SIM with the IMSI and secret keys stored on it, not with the ICCID. The ICCID matters before the trip: it is the number your carrier or eSIM provider uses to activate, replace or look up the SIM or eSIM you are travelling with.

Is the ICCID number the same as the SIM phone number?

No, the ICCID number and the SIM phone number are not the same. The ICCID is a unique identifier for the SIM card itself, while the phone number (MSISDN) is assigned by the carrier to enable voice and text services. A single ICCID may be linked to different phone numbers during its lifecycle, especially if reused or reprogrammed.

It also works the other way round: if your SIM is replaced, the new card has a new ICCID, but the carrier moves your existing phone number onto it. There is no public tool that turns an ICCID into a phone number; only the carrier that issued the SIM can look that up, after checking your identity.

Does an eSIM have an ICCID number as well?

Yes, an eSIM also comes with an ICCID number. Even though it’s embedded into the device instead of being a physical card, the eSIM still follows the same identification structure. The ICCID is essential for activating and managing the eSIM on carrier networks, just like with a traditional SIM card.

Each eSIM profile has its own ICCID. If you delete a profile and install a new one, the new profile comes with a new ICCID. The number that stays the same is the EID, which identifies the eSIM chip in your phone. So every travel eSIM you add, such as a BitJoy eSIM, shows up with its own ICCID next to that line in Settings.

ICCID, IMSI, and IMEI: What's the difference?

ICCID, IMSI, and IMEI all live in the world of mobile networks but identify completely different things. Carriers and tech support staff often ask for one or the other depending on what they need to do, so knowing which is which saves time. Here's how they compare side by side:

Quick way to remember: ICCID = the SIM, IMSI = the subscriber, IMEI = the device. If you're using an eSIM, you also have an EID number that identifies the eSIM chip itself, separate from the ICCID of the profile loaded onto it.

How to find the ICCID number

Whether you're using a physical SIM or an eSIM, locating your ICCID number is simple. Here’s how to check it on common devices and platforms.

How to find the ICCID on an iPhone

Apple's steps:

1. Open Settings and tap General.
2. Tap About.
3. Scroll down to ICCID. With Dual SIM, each line (physical SIM or eSIM) shows its own ICCID.

Touch and hold the number to copy it. If the phone will not open, connect it to a computer, select it in the Finder (or the Apple Devices app or iTunes on Windows) and click the phone number under the device name to show the EID, IMEI and ICCID.

How to find the ICCID on an Android

Android menus differ by brand, and some phones or carriers hide the ICCID entirely.

• Google Pixel: Settings > About phone > SIM status (choose the SIM), then scroll to the bottom.
• Samsung Galaxy: Settings > Connections > SIM manager, tap the SIM, then More information.
• Other brands: Settings > About phone > Status > SIM status (or SIM card information).
• Dialer code: on some models, dialing *#06# shows the ICCID next to the IMEI.
• On the card: the ICCID is printed on a physical SIM and on the card it came in, starting with 89.

Using AT commands or carrier platforms

For advanced users or IoT device managers, AT commands can be used to retrieve the ICCID. Sending AT+CCID via a serial interface typically returns the full number.

Alternatively, many carrier platforms or device management portals provide access to ICCID numbers for connected devices, especially in enterprise or IoT setups.

Common questions about ICCID numbers

The ICCID number is a critical part of SIM and eSIM technology, but many users still have questions about how it works and what it can do. Here are answers to some of the most common concerns.

Can I track a lost phone using the ICCID?

No, the ICCID number alone cannot be used to track a lost phone. While it identifies the SIM card, it doesn’t provide real-time location data. Tracking typically requires the device’s IMEI and coordination with the mobile carrier or law enforcement.

Is it possible to change the ICCID on an iPhone or Android?

No, users cannot manually change the ICCID on either iPhone or Android devices. The ICCID is burned into the SIM or eSIM by the provider. Changing it would require issuing a new SIM or reprogramming a new eSIM profile through the carrier.

Is it safe to share the ICCID number?

In general, it's not recommended to share your ICCID number publicly. While it doesn’t directly expose your personal data, the ICCID can be used in SIM provisioning or by someone attempting unauthorized access through carrier systems. Keep it private, just like other device identifiers: do not post screenshots that show the full number, and when you only need to confirm which SIM you mean, sharing the last four digits is usually enough.

Can ICCID numbers be recycled or reused?

ICCIDs are designed to be unique, and a consumer SIM or eSIM profile keeps the same ICCID for its whole life. Whether an operator ever reissues a retired number is an internal matter, so in practice treat an ICCID as belonging to one SIM or one eSIM profile.

Whether you are setting up a new phone, switching carriers or adding a travel eSIM, knowing where to find your ICCID makes support calls quicker. Planning a trip? Browse BitJoy eSIM plans for 200+ destinations and install yours before you fly.

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