Tools

ICCID decoder

Paste the number printed on any SIM card (or read from the EF_ICCID file) and we break down its ITU-T E.118 structure: industry identifier, issuer country, IIN, account number and Luhn check digit. Everything is computed in your browser.

How to read an ICCID

The ICCID (Integrated Circuit Card Identifier) identifies the physical SIM card — the chip — not the line. It follows ITU-T recommendation E.118: it starts with 89 (telecom industry), followed by the issuer country's calling code (34 for Spain), then the issuer identifier within that country, the individual account number the issuer assigns to the chip, and a check digit computed with the Luhn algorithm. That's why two SIMs from the same provider share their leading digits — and why a mistyped ICCID almost always fails validation.

Related

Glossary: ICCID vs IMSI vs IMEIMCC-MNC lookup & IMSI decoderIMEI checkerMulti-carrier IoT SIM cards

Frequently asked questions

What is a SIM card's ICCID?
It's the unique serial number of the SIM card chip, defined in ITU-T recommendation E.118. It identifies the physical card, not the phone number or the subscriber: a SIM keeps its ICCID even if its MSISDN or plan changes. It's usually printed on the card itself and is what an operator asks for to activate or port it.
How many digits does an ICCID have?
Up to 20 digits including the check digit, with 19 and 20 being the common lengths. Some legacy cards use 18. If a trailing F shows up when reading it via software, it's hexadecimal padding from the EF_ICCID file and gets discarded.
Does the ICCID reveal the SIM's operator?
Partially. The leading digits (the IIN) identify the card issuer: 89 + country calling code + issuer code. Issuer code assignment is national and there is no complete public registry, so this tool shows the country and the IIN but cannot always name the operator. To identify the serving operator, the IMSI is more reliable.
Is ICCID the same as IMSI or IMEI?
No. The ICCID identifies the physical SIM card, the IMSI identifies the subscriber on the mobile network (country and operator derive from its MCC/MNC), and the IMEI identifies the device or modem. IoT deployments juggle all three — see our ICCID vs IMSI vs IMEI glossary entry for the details.

Need IoT SIMs for your project?

Multi-carrier SIMs with coverage in 190+ countries, a management portal and an API. Test kit for €15 with shipping included in Spain.

Buy the test kitTalk to the team