eUICC identifier (EID)
The eUICC identifier, separate from the subscription.
Definitions only — a term explained here is not a service we sell.
The eUICC identifier (EID) is the 32-digit number written into the secure element that holds eSIM profiles. It names the chip, not the subscription or the phone number.
Why it matters
A support ticket that carries an EID points at one physical chip. The profile on that chip can change, and the subscription behind it can move to another chip, so the EID is the stable key for inventory and service records.
EID structure
Decoded in your browser. Nothing is uploaded.
- Industry identifier
- 89
- Country code
- 049
- Issuer
- 032
- Issuer information
- 1234567890
- Individual number
- 000000000001
- Check digits
- 54
- Check
- Valid
Text description
The example is synthetic. The first two digits are 89 for telecom, followed by a three-digit country code, a three-digit issuer identifier, ten digits of issuer information, a twelve-digit individual number and two MOD 97-10 check digits. The decoder checks the final two digits.
What to check
Log the EID at manufacture, activation and replacement. Do not print a full EID on a customer-facing receipt; treat it as inventory data. The identifier toolkit decodes an EID in the browser, and the four numbers explainer shows where it sits next to IMSI, ICCID, IMEI and MSISDN.