MSISDN=8801500121121MSISDN=CCCXXN1N2N3N4N5N6N7N8 For further information on the MSISDN format, see the ITU-T specification E.164. See also E.164 International Mobile Equipment Identity (IMEI) International Mobile Subscriber Identity (IMSI) SIM card Mobile phone GSM HLR E.214 Mobile identification number References External links http://www.3gpp.org, GSM 03.03 (see section 3.3) http://www.openmobilealliance.org http://www.itu.int, E.164, E.212, E.213, E.214 https://web.archive.org/web/20110222090438/http://www.gsmworld.com/ ITU-T recommendations Telephone numbers Identifiers