What is STD Code?

Subscriber Trunk Dialing Code usually known as STD Code is allotted to each city or village/town in India. STD Codes are of multiple types based on the size of the city. STD codes can be between 2 and 8 digits long.

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STD (Subscriber Trunk Dialling) Code


What exactly is the Subscriber Trunk Dialling (STD) Code?

Each city, village, and town in India has been given its own Subscriber Trunk Dialing Code, which is more commonly referred to as an STD Code. STD codes can be broken down into a variety of subcategories according to the population of the city. The number of digits in an STD code can range anywhere from 2 to 8.

The standard telephone dialing code in large cities and the most populous metropolitan areas, such as Delhi, Mumbai, Chennai, Pune, and Kolkata, is two digits. On the other hand, STD codes consisting of three digits are used in Tier 2 cities like Patiala, Nashik, Surat, Durgapur, Kochi, Kolhapur, and Jalandhar, as well as other smaller cities.

How Should the STD Code Be Used?

The length of the subscriber's phone number can range from six to eight digits, depending on the number of digits in the STD code. The STD code can be either four, three, or two digits long.

  • When there are only two digits in the STD code, the subscriber's phone number will have a total of eight digits (2 Digits STD Code + 8 Digits subscriber's phone number).

  • When the STD code is three digits, the subscriber's phone number will be seven digits (3 digits for the STD code plus 7 digits for the subscriber's phone number).

  • When the STD code is four digits, the subscriber's phone number will be six digits long (that is, 4 digits for the STD code plus 6 digits for the subscriber's phone number).


STD Code List of Tier-1 Cities

Every municipality, town, and even village in India has its own unique Telephone Access Code, also known as an STD. The area codes (STD codes) for the larger metropolitan areas tend to be shorter, with the shortest one having only two digits. We have included a comprehensive list of STD codes for tier-1 cities in India below for your convenience.


STD CodeCity NameState Name
11 New Delhi Delhi
22 Mumbai Maharastra
33 Kolkata West Bengal
44 Chennai Tamil Nadu
40 Hyderabad Telengana
80 Bangalore Karnataka
20 Pune Maharashtra
79 Ahmedabad Gujarat



STD Code List of Tier-2 Cities

STD codes in tier-2 cities in India typically have three digits. The STD codes for India's tier-2 cities are listed below for your convenience.


STD CodeCity NameState Name
135 Dehradun Uttarakhand
161 Ludhina Punjab
175 Patiala Punjab
141 Jaipur Rajasthan
291 Jodhpur Rajasthan
294 Udaipur Rajasthan
251 Kalyan Maharashtra
260 Vapi Gujarat
261 Surat Gujarat
265 Vadodara Gujarat
326 Jharkhand Jharkhand
361 Guwahati Assam
364 Shillong Meghalaya
413 Puducherry Puducherry
421 Tiruppur Tamil Nadu
422 Coimbatore Tamil Nadu
424 Erode Tamil Nadu
427 Salem Tamil Nadu
431 Tiruchirapalli Tamil Nadu
452 Madurai Tamil Nadu
471 Thiruvananthapuram Kerala
474 Kollam Kerala
484 Kochi Kerala
487 Thrissur Kerala
495 Kozhikode Kerala
497 Kannur Kerala
522 Kanpur Uttar Pradesh
522 Lucknow Uttar Pradesh
532 Allahabad Uttar Pradesh
542 Varanasi Uttar Pradesh
551 Gorakhpur Uttar Pradesh
612 Patna Bihar
641 Bhagalpur Bihar
657 Jamshedpur Jharkhand
674 Bhubaneshwar Odisha
712 Nagpur Maharashtra
731 Indore Madhya Pradesh
734 Ujjain Madhya Pradesh
744 Kota Rajasthan
755 Bhopal Madhya Pradesh
816 Tumkur Karnataka
821 Mysore Karnataka
824 Bangalore Karnataka
831 Belgaum Karnataka
836 Hubli Karnataka
861 Nellore Andhra Pradesh
863 Guntur Andhra Pradesh
866 Vijayawada Andhra Pradesh
877 Tirupati Andhra Pradesh
883 Rajahmundry Andhra Pradesh
884 Kakinada Andhra Pradesh
870 Warangal Telengana
891 Visakhapatanam Andhra Pradesh


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