MIN (Mobile Identification Number)
are numbers that uniquely identify mobiles working under TIA
standards for Cellular and PCS technologies.
IRM (International Roaming MIN) are
MIN with the following format: 0-XXX+6D or 1-XXX+6D. The IRM
concept was expanded in March 2004 to include MIN codes with the
format XXX-0+6D and XXX-1+6D. They are now also available for
The 4 digit prefix of an IRM is allocated
by IFAST (International Forum
on ANSI-41 Standards Technology) that attempts to facilitate international roaming by
minimizing conflicts with North American MIN.
The last 6
digits of an IRM are allocated by the carrier.
Guidelines (V5.6) June 2013.
Note: In case of a discrepancy between the HTML and Word versions of
the IFAST IRM Guidelines, the Word version should be taken as
for SID and IRM export files.
Expansion Presentation .
IRM Allocation Table. (Legacy queries still available).
IRM Application and Payment Form.
Topic 3 with other IRM related documents.
IRMs and Number Portability.