Telephone numbers in India
|Country calling code||+91|
|International call prefix||00|
Fixed (landline) numbersEdit
Subscriber Trunk Dialling (STD) codes are assigned to each city/town/village, with the larger Metro cities having shorter area codes (STD codes), which are from 2 to 8 digits long. For example,
- 11 - New Delhi, Delhi
- 22 - Mumbai, Maharashtra
- 33 - Kolkata, West Bengal
- 44 - Chennai, Tamil Nadu
- 20 - Pune, Maharashtra
- 40 - Hyderabad, Telangana
- 79 - Ahmedabad, Gujarat
- 80 - Bangalore, Karnataka
Tier-2 Cities in India have STD code with 3 digits. For example,
- 120 - Ghaziabad/Noida, Uttar Pradesh
- 124 - Gurgaon, Haryana
- 135 - Dehradun, Uttarakhand
- 141 - Jaipur, Rajasthan
- 161 - Ludhiana, Punjab
- 175 - Patiala, Punjab
- 181 - Jalandhar, Punjab
- 231 - Kolhapur, Maharashtra
- 240 - Aurangabad, Maharashtra
- 261 - Surat, Gujarat
- 484 - Kochi, Kerala
- 551 - Gorakhpur, Uttar Pradesh
- 562 - Agra, Uttar Pradesh
- 581 - Bareilly, Uttar Pradesh
- 591 - Moradabad, Uttar Pradesh
- 612 - Patna, Bihar
- 641 - Bhagalpur, Bihar
- 657 - Jamshedpur, Jharkhand
- 870 - Warangal, Telangana
- 891 - Visakhapatnam, Andhra Pradesh
Kanpur and Lucknow were the two cities between which the first STD call of the country was made.
Land line numbers are at most 8 digits long (usually in major metros).
Due to the availability of multiple operators offering fixed line services (either over wire or wireless), there is an operator-code for each telephone number, which is the first digit in the phone number. These are
- BSNL - Numbers start with a '2'
- MTNL - Numbers start with a '2'
- Reliance Communications - Numbers start with a '3'
- Bharti Airtel - Numbers start with a '4'
- MTS India - Numbers start with a '5'
- Datacom Solutions - Numbers start with a '6'
- Tata Indicom - Numbers start with a '7'
Thus, a number formatted as 020-30303030 means a fixed-line Reliance number in Pune, while 011-20000198 is an MTNL fixed line in Delhi and 033-45229320 is a fixed-line Airtel number in Kolkata, and 07582-221434 is a BSNL number from Sagar, Madhya Pradesh.
No prefix is required to call from one landline to another in the same STD area. A prefix of "0+STD code" is required to dial from a landline phone in one STD code area to another. A prefix of "0+STD code" is required to dial from a mobile phone in India to any landline number, irrespective of STD area.
For example, to dial a landline number in Indore, one would have to dial
- from a landline in Indore: the phone number
- from a landline in Mumbai: 0731 and then the phone number
- from any mobile phone in India: 0731 and then the phone number
- from outside India: Country Code 91 then 731 and then the phone number
Before 10 March 2009, as per Department of Telecommunications memorandum dated 9 February 2009. there were some exceptions to this general rule for STD areas falling close to each other (within a radius of 200 kilometre), where "0" can be replaced with "95" e.g. to dial Delhi from Gurgaon, one dials 9511+landline number.
A typical mobile number in India is "+91-XXXX-NNNNNN". Where the first four digits indicate a operator's code, while the remaining six digits are unique to the subscribers. However, with portability in place, the first four digits may not indicate a particular operator.
There are many companies in the Indian market who rent keywords, on a monthly basis, whose characters, on a typical mobile phone keypad, represent short codes. Short codes are five digits in length and have to start with the digit '5' like 58888 as of 2007. Previously, they were four-digit in number and could be of any combination, like 8888 or 7827. The current five digits can be extended by three digits further representing 3 additional characters. Messages sent to these Short Codes are commonly referred to as Premium Rate SMS Messages and cost from per message depending on the operator as well as the service and the company.p
- "Maharashtra STD Codes". Retrieved 2017-07-17.
- "DoT Memorandum 10th Feb 09" (PDF). Retrieved 2009-04-08.
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