Talking about STD codes, before dialing any fixed line in a city, other than the one you are in, you will have to affix the STD (Subscriber Trunk Dialing) code of former city, ahead of the phone number. In the same way, you will have to affix the ISD (International Subscriber Dialing) code to the fixed line number of a city, if you are calling from abroad. In case you are dialing a mobile/cell phone number, the STD code will be zero (0) and the ISD code will be 091, throughout the country. in the following lines, we have provided the complete lost of the STD and ISD codes of West Bengal.
| City | STD Code | ISD Code |
| Adra | 03251 | 091-3251 |
| Agradip | 03453 | 091-3453 |
| Ahivan | 03483 | 091-3483 |
| Ahmedpur | 03463 | 091-3463 |
| Aiho | 03511 | 091-3511 |
| Ajodhya | 03214 | 091-3214 |
| Algara | 03552 | 091-3552 |
| Anara | 03251 | 091-3251 |
| Asansol | 0341 | 091-341 |
| Bankura | 03242 | 091-3242 |
| Barabhum | 03253 | 091-3253 |
| Baraker | 03446 | 091-3446 |
| Bhiringi | 0343 | 091-343 |
| Burnia | 03474 | 091-3474 |
| Burdwan | 0342 | 091-342 |
| Chalsa | 03562 | 091-3562 |
| Chapra | 03474 | 091-3474 |
| Darjeeling | 0354 | 091-354 |
| Diamond Harbour | 03174 | 091-3174 |
| Digha | 032208 | 091-32208 |
| Durgapur | 0343 | 091-343 |
| Fatepur | 03172 | 091-3172 |
| Gangasagar | 03210 | 091-3210 |
| Ghoom | 0354 | 091-354 |
| Haldia | 03224 | 091-3224 |
| Howarh | 033 | 091-33 |
| Jalgaon | 03566 | 091-3566 |
| Jhanjra | 0341 | 091-341 |
| Jalpaiguri | 03561 | 091-3561 |
| Kalighat | 03582 | 091-3582 |
| Kalimpong | 03552 | 091-3552 |
| Kalindi | 03220 | 091-3220 |
| Kurseong | 03554 | 091-3554 |
| Kolkata | 033 | 091-33 |
| Lalbagh | 03483 | 091-3483 |
| Manikpur | 03664 | 091-3664 |
| Malda | 03512 | 091-3512 |
| Mankar | 0343 | 091-343 |
| Mirik | 0354 | 091-354 |
| Mirzapur | 03220 | 091-3220 |
| Murshidabad | 03483 | 091-3483 |
| Nabadwip | 03472 | 091-3472 |
| Nahata | 03215 | 091-3215 |
| Nandigram | 03224 | 091-3224 |
| Noorpur | 03172 | 091-3172 |
| Orgram | 03452 | 091-3452 |
| Palassy | 03474 | 091-3474 |
| Purulia | 03252 | 091-3252 |
| Parulia | 03454 | 091-3454 |
| Raigunj | 03523 | 091-3523 |
| Riapara | 03228 | 091-3228 |
| Rudranagar | 03210 | 091-3210 |
| Siliguri | 0353 | 091-353 |
| Tarapith | 03461 | 091-3461 |
| Tribeni | 03167 | 091-3167 |
| Triveni | 033 | 091-33 |
| Tamluk | 03228 | 091-228 |
