​​​​​​​​​​​​Issuer Identifier Number Notification ​​​Form

Issuer Identifier Number for the cards to identify accounts for charging telecommunication services
(According to Recommendation ITU-T E.118 (09/2025))

• Notification form for a single Issuer Identifier Number (IIN) (and Identifier number of the sub-assignee (INoS) in case with sub-assignment) for the cards to identify accounts for charging telecommunication services

Applicants applying for a single IIN (and INoS if the Administration assigns a smaller amou​nt of numbering resources) are requested to fill in the notification form and submit it to the approving organization (normally the Administration) in their country for completion before it is sent to ITU for notification.​ (see detailed procedure further below) 

Note by the TSB

For information, the complete list of Issuer Identifier Numbers (IINs) (and INoS in case with sub-assignment) that have been notified to ITU is published periodically as an Annex to the ITU Operational Bulletin (available for free download). All changes to the information contained in this list should also be communicated to the TSB Secretariat at ITU for record updates and publication as amendments in the ITU Operational Bulletin (available for free download).​

The sections below describe in detail the procedures for assignment, modification and cancellation.
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According to Recommendation ITU-T E.118 (09/25), ”Allocation, assignment, registration and management of Issuer Identifier Numbers for geographic area” is specified as follows:

”The assignment of issuer identifier numbers is the responsibility of the administration of a country or group of countries as appropriate. Issuer identifier numbers are assigned only to generate PAN in accordance with this Recommendation. The Administration decides who can issue PANs, that is, the operators charging for the provision of telecommunication services in a public telecommunication network.”

Additional information related to IIN:

As per Recommendation ITU-T E.118​ (09/2025), Primary Account Numbers (PANs) ”identify accounts that can be used for charging telecommunication services. In the case of a subscriber identity module (SIM) and embedded SIM (eSIM), a PAN is also known as an integrated circuit card identifier (ICCID) number or serial number of the subscriber identity module (SIM). A PAN is a unique number used to identify a universal integrated circuit card (UICC), a profile in an embedded universal integrated circuit card (eUICC) or a charge card.”
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”A PAN is generated by an issuer, identified by an Issuer identification number which includes an Issuer Identifier Number (IIN).”

The structure is as follows:​ 

(1) Sub-assignment is not allowed

(2) Sub-assignment is allowed

The Issuer Identification Number is the identification number of the entity that charges the clients (issuing the cards).

Issuer Identifier Number (IIN) – identifies the issuer in case of no sub-assignment and, in any case, it identifies the assignee in the country identified by the CC. Together with MII and CC, it shall have a maximum of 7 digits, or a variable number of digits;

Major Industry Identifier (MII) “89” is assigned by ISO/IEC to ITU-T for telecommunication purposes in accordance with ISO/IEC 7812-1; Country Code (CC) is variable from 1 to 3 digits in accordance with Recommendation ITU-T E.164. Identifier Number of the Sub-assignee (INoS), in countries where it is allowed by the Administration, identifies the sub-assignee of the assignee identified by INoA. This field may also be used by the administration for the assignment of a smaller amount of numbering resources.

For more details, please refer to the Recommendation ITU-T E.118 (09/2025): https://www.itu.int/rec/T-REC-E.118-202509-I/en​  

Notification procedure for a new ITU-T E.118 IIN (and INoS in case with sub-assignment)

The notification form can be downloaded at the link below:
http://www.itu.int/oth/T0206000007

The Applicant must complete and sign part A of the notification form.

The Administration (or duly authorized coordinating organization) must complete and sign Part B of the notification ​form.
Note: the effective date of usage should be provided and the assignment box must be ticked on the form

It is only after approval by the Administration that the notification form should be sent to ITU, TSB.

Specific fields of the form that may require careful consideration by the Applicant include the following:​

​Concerning the role of the principal contact person in the organization, there is no requirement in Recommendation ITU-T E.118. However the contact details will be published in the ITU Operational Bulletin, which is publicly accessible, and registered with ITU. So the contact could possibly receive queries related to notified IIN (and INoS in case with sub-assignment).

For any further information or support, contact ITU, TSB/OBNA at tsbtson@itu.int

Modification of information related to notified ITU-T E.118 IIN (and INoS in case with sub-assignment)​

IIn order to keep the list up to date, all notified companies have the responsibility to inform ITU, TSB of all changes relating to their company and contact person, including the full address and e-mail address, by e-mail at tsbtson@itu.int

Updates need to be endorsed by, or sent through, the Administration.​

Cancellation procedure for an ITU-T E.118 IIN(and INoS in case with sub-assignment)

Should the IIN no longer be in use by the notified company, its cancellation would need to be validated or in the case of sub-assignment, noted by the Administration.

The following steps should be completed:​

• ​Part A of the notification form should be completed;
• Part B of the notification form​ must be completed and signed by the Administration.

Note: the effective date of cancellation should be provided and the cancellation box should be ticked on the form

The cancellation form can be downloaded at the link below:
http://www.itu.int/oth/T0206000007

Following the Administration’s confirmation of cancellation, the notification form should be sent to ITU, TSB by e-mail at tsbtson@itu.int.​

List of ITU-T E.118 IINs with assignee contact not reachable

It is important that all IIN assignees can be reached so that they can be notified of administrative matters that may require action, or so that queries related to notified IINs can be handled.

A public team name, telephone number or mailbox e-mail address for the person or team responsible for handling these queries should be provided.

More specifically, the companies indicated in the following document are requested to follow the modification or cancellation procedure indicated in this web page.

List of ITU-T E.118 IINs for which the assignee contact is not reachable: E118_IIN-assignee-contact-not-reachable.docx​

Contact