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Mobile telephone numbering in India

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Telecom Regulator TRAI has divided the country into various cellular zones such that within each zone, the call is treated as a local call, while across zones, it becomes a long-distance call. A cellular zone (or cellular circle) is normally the entire state, with a few exceptions like Mumbai (which is a different zone), Goa (the state, which is a part of the Maharashtra zone) or Uttar Pradesh (which is so big it was divided into multiple zones)

All mobile numbers in India have the prefix 9 (This includes pager services, but the use of pagers is on the decline). Each zone is allowed to have multiple private operators (earlier it was 2 private + BSNL, subsequently it was changed to 3 private + BSNL in GSM 900/1800, now it also includes 2 private + BSNL in CDMA). All cellphone numbers are 10 digits long, (normally) split up as OO-AA-NNNNNN where OO is the operator code, AA is the zone code assigned to the operator, and NNNNNN is the subscriber number.

The numbering plan is as follows: 

92-yy-yyyyyy - Tata Indicom mobile phones. These don't seem to follow the OO-AA-NNNNNN system.
93-xx-yyyyyy - Reliance India Mobile. The two digit code XX identifies the cellular zone.
94-xx-yyyyyy - BSNL. The two digit code XX identifies the cellular zone.
98-xx-yyyyyy - All private (non government-owned) GSM operators. The two digit code XX identifies 
the operator as well as the cellular zone.

The list of operator and (GSM) network codes is (in order of Network Code - Numbering Plan - Owner):

  • INA-07 - 9848 - Idea Cellular Andhra Pradesh
  • INA-09 - 9864 - Reliance Assam
  • INA-13 - 9885 - Essar Cellular, Andhra Pradesh
  • INA-22 - 9822, 9850,9881 - Idea Cellular Maharashtra Circle (Maharashtra & Goa)
  • INA-27 - 9823 - BPL Mobile, Maharashtra Circle (Maharashtra & Goa)
  • INA-36 - 9835 - Reliance Bihar
  • INA-38 - 9435 - BSNL Assam
  • INA-49 - 9849 - Airtel India (Bharati Mobile), Andhra Pradesh
  • INA-66 - 9422,9423 - BSNL Maharashtra Circle (Maharashtra & Goa)
  • INA-73 - 9440 - BSNL Andhra Pradesh
  • INA-74 - 9434 - BSNL Andaman, Nicobar and West Bengal
  • INA-75 - 9431 - BSNL Bihar
  • INA-85 - 9832 - Reliance West Bengal
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