IMSI Assignment and Management Guidelines and Procedures

The "IMSI Assignment and Management Guidelines and Procedures" contains the guidelines and procedures for the assignment and use of International Mobile Subscriber Identities (IMSIs) in the United States with consideration given to other North American Numbering Plan (NANP) countries.

The document is updated and revised by the IOC as the need arises and is currently in Version 15.0, last updated March 2014. Revisions to the guidelines are effective upon publication by the IOC Secretariat.

IMSI Assignment and Management Guidelines Version 15 (.doc)

All applications for IMSIs are submitted and processed through the IMSI-A website.

For your convenience the following are available for download separate from the full Guidelines above:

IOC Issue/Appeal Identification Form (.doc)

Annex C International Mobile Subscriber Identity (IMSI)
Application and Related Forms Package


  Link to ATIS Editorial Site