21 July 2010

Mobile Telephone Numbering In India:

The Telecom Regulatory Authority of India (TRAI) has divided India 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 (which is a part of the Maharashtra zone) or Uttar Pradesh (divided into multiple zones).
From 20th May 2005, calls between Mumbai Metro and Maharashtra Telecom Circle, Chennai Metro and Tamilnadu Telecom Circle, Kolkata Metro and West Bengal Telecom Circle and Uttar Pradesh (East) and Uttar Pradesh (West) Telecom Circle Service Areas are merged in Inter service area connectivity. With the above arrangement, calls within a State in the above-mentioned four States would be treated as intra-service area call for the purposes of routing as well as Access Deficit Charges (ADC). The dialing procedure for calls within a State for these States would also be simplified i.e. dialing of mobile-to mobile subscribers and fixed-to-mobile subscribers would be without prefixing '0'.
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.

Telecom Circles in India:

Andhra Pradesh
Assam
Bihar & Jharkhand
Chennai
Delhi
Gujrat
Himachal Pradesh
Haryana
Jammu & Kashmir
Kerala
Karnataka
Kolkata
Maharashtra
Madhya Pradesh & Chhattisgarh
Mumbai
North East
Orissa
Punjab
Rajasthan
Tamilnadu
Uttar Pradesh(East)
Uttar Pradesh(West) & Uttarakhand
West Bengal & Andaman Nikobar


Cellular Operator In India:

Airtel (GSM)
Aircel (GSM)
BPL Mobile (GSM)
Dishnet Wireless Ltd. (GSM)
Dolphin (MTNL) (GSM)
Hutch (Now Vodafone Essar)(GSM)
Idea (GSM)
Reliance (GSM)
Rainbow (Shyam Telelink) (CDMA)
Spice (GSM)

Numbering plan:

92-xx-yyyyyy - TATA Indicom Numbers
93-xx-yyyyyy - Reliance Mobile Numbers
94-xx-yyyyyy - BSNL Cell One Numbers
97-xx-yyyyyy - Various operators except Reliance, TATA and BSNL
98-xx-yyyyyy - Various operators except Reliance, TATA and BSNL
99-xx-yyyyyy - Various operators except Reliance, TATA and BSNL