International Mobile Subscriber Identity

The International Mobile Subscriber Identity (IMSI ) used in GSM and UMTS mobile networks to uniquely identify network nodes (internal subscriber identity ). Among other data, the IMSI is for a special smart card, the so-called SIM ( Subscriber Identity Module), stored. The IMSI number is assigned globally unique per customer by mobile network operators. The IMSI has nothing to do with the phone number associated with the SIM card.

IMSI structure

The IMSI consists of up to 15 digits and is composed as follows:

Examples of IMSI:

  • 262 01 9876 543210 - MCC = 262 for Germany, MNC = 01 for T -Mobile, MSIN = 9876543210 for the participant.
  • 262 02 9745 642 210 - MCC = 262 for Germany, MNC = 02 for Vodafone D2, MSIN = 9745642210 for the participant.
  • 310 240 9745 64247 - MCC = 310 for USA, MNC = 240 for VoiceStream, MSIN = 974 564 247 for the subscriber.
  • 262 07 9745 642 247 - MCC = 262 for Germany, MNC = 07 for O2, MSIN = 9745642247 for the participant.

IMSI in Germany

In Germany IMSIs be allocated in blocks by the Federal Network Agency, one IMSI block by a unique combination of MCC and MNC is formed. So far, the following IMSI blocks were allocated:

  • 01 262 German Telekom Mobilnet GmbH (T -Mobile )
  • 262 02 Mannesmann GmbH Mobile (Vodafone)
  • 262 03 E -Plus mobile GmbH
  • 262 04 Mannesmann Mobile GmbH
  • 262 05 E-Plus mobile GmbH
  • 06 262 German Telekom GmbH Mobilnet
  • 262 09 Mannesmann Mobile GmbH
  • 262 10 Mannesmann Arcor ( GSM -R )
  • 262 16 vistream GmbH
  • 262 77 E -Plus mobile GmbH

IMSI in Austria

In Austria, the broadcasting and telecommunications regulatory GmbH is responsible for the award.

  • 232 01 A1 Telekom Austria AG
  • 232 02 A1 Telekom Austria AG
  • 232 03 T -Mobile Austria GmbH
  • 232 05 Hutchison Three Austria GmbH
  • 232 07 T -Mobile Austria GmbH
  • 232 08 Lycamobile Austria Ltd.
  • 232 09 A1 Telekom Austria AG
  • 232 10 Hutchison Three Austria GmbH
  • 232 11 A1 Telekom Austria AG
  • 232 12 A1 Telekom Austria AG
  • 232 13 UPC Austria Services GmbH
  • 232 14 Hutchison Three Austria GmbH
  • 232 15 Mundio mobile (Australia ) Limited
  • 232 16 Hutchison Three Austria GmbH
  • 91 232 ÖBB - Infrastructure AG
415220
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