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==Zones== The Department of Telecommunications 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 telecom circle) is normally the entire state, with a few exceptions like Mumbai and Kolkata (which are different zones than their respective states), Goa (which is a part of the Maharashtra zone), Chhattisgarh (which is part of Madhya Pradesh), Jharkhand (which is a part of the Bihar zone) or Uttar Pradesh (divided into multiple zones). Delhi is a unique circle because it includes towns from Haryana and Uttar Pradesh as well. Recently Telangana State has been separated from Andhra Pradesh State which will still remain in the same cellular network zone. From May 20, 2005, calls between * Mumbai Metro and Maharashtra Telecom Circle, * Chennai Metro and Tamil Nadu Telecom Circle, * Uttar Pradesh (East) and Uttar Pradesh (West) Telecom Circle Service Areas are merged in Inter service area connectate 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. dialling of mobile-to mobile subscribers and fixed-to-mobile subscribers would be without prefixing '0'.〔(DoT Notice )〕 At present, there are 22 telecom circles or service areas. They are classified into 4 categories: Metro, A, B, C. Delhi, Mumbai, Kolkata fall under Metro category. Chennai service area doesn't come under Metro category. It has been a part of Tamil Nadu service area since 2007.〔(India calling info )〕 All mobile numbers in India have the prefix 9, 8 or 7 (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/MTNL, subsequently it was changed to 3 private + BSNL/MTNL in GSM, now each zone has more than 10 operators including BSNL/MTNL. All mobile phone numbers are 10 digits long. The way to split the numbers is defined in the National Numbering Plan 2003 as XXXX-NNNNNN where ''XXXX'' is the Network operator,''NNNNNN'' is the subscriber numbers. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mobile telephone numbering in India」の詳細全文を読む スポンサード リンク
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