why does the mobile numbers in india stats with 9?

Answer 1

indian Country Code 9

The country code is the national prefix to be used when dialing TO that particular country FROM another country. In some cases you will also need to dial a city or area code. When a country name appears in the table as a link, there will be additional information regarding city or area codes.

IDD Prefix (International Direct Dialing)

The IDD prefix is the international prefix needed to dial a call FROM the country listed TO another country. This is followed by the country code for the country you are calling (see above). The IDD situation in many countries has been changing regularly. Some countries have multiple IDDs, with each one used by a different long-distance carrier.

NDD Prefix (National Direct Dialing)

The NDD prefix is the access code used to make a call WITHIN that country from one city to another (when calling another city in the same vicinity, this may not be necessary). The NDD is followed by the city/area code for the place you are calling (city/area codes, where applicable, can be viewed by following the link from the country name on the table below). Phone numbers are often written in this format: +44-(0)1224-XXXX-XXXX. This expresses the numbers used for both international and national long-distance calls. In the example, +44 indicates the country code, while (0) indicates the NDD. When dialing from outside the country, the NDD would not be used after dialing the country code; when dialing from within that country, the NDD would be used, but the country code would not. NOTE: All city/area codes used on this site are expressed for use in international calling; for national calls, prefix the area/city code with the NDD.

Answer 2

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 (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.

Answer 3

May be bcoz its not possible to start with 10...jus kidding
Or is it bcoz of our country code being 91.