What is an ICCID and what can it tell me?¶

An ICCID identifies a particular physical SIM card or eSIM profile. It can connect that credential to provider activation, replacement and subscription records.

Trace the SIM instance¶

An ICCID may be printed on a card, displayed in settings, held by a provider or recovered through specialist examination. Depending on available records, the provider may associate it with an IMSI, subscription, telephone number, activation date and replacement history. Exact recording helps distinguish several recovered SIMs or profiles.

Relationships are not permanent. A replacement SIM can receive a new ICCID while retaining a number; an eSIM profile can be reissued; and number porting changes provider relationships.

Do not turn the credential into a user¶

The card or profile may be registered to one person, supplied by an organisation and used by another, or found in someone else's handset. ICCID does not show who inserted, possessed or operated it.

Record the source and time of the value and correlate it with IMEI, IMSI, number, handset and provider events. That can reconstruct which credential was active without claiming that the credential itself establishes authorship.