STD Codes of Bihar
| City Name | STD Code |
|---|
| Adhaura | 06180 |
| Amarpur | 06420 |
| Araria | 06453 |
| Areraj | 06258 |
| Arrah | 06182 |
| Arwal | 06337 |
| Aurangabad | 06186 |
| Bagaha | 06251 |
| Banka | 06424 |
| Banmankhi | 06467 |
| Barachakia | 06257 |
| Barauni | 06279 |
| Barh | 06132 |
| Barsoi | 06451 |
| Begusarai | 06243 |
| Benipatti | 06271 |
| Benipur | 06242 |
| Bettiah | 06254 |
| Bhabhua | 06189 |
| Bhagalpur | 0641 |
| Bidupur | 06229 |
| Biharsharif | 06112 |
| Bikram | 06135 |
| Bikramganj | 06185 |
| Birpur | 06471 |
| Buxar | 06183 |
| Chakai | 06347 |
| Chapra | 06152 |
| Dalsinghsarai | 06278 |
| Danapur | 06115 |
| Darbhanga | 06272 |
| Daudnagar | 06328 |
| Dhaka | 06250 |
| Dhamdaha | 06462 |
| Dumraon | 06323 |
| Ekma | 06155 |
| Forbesganj | 06455 |
| Gaya | 0631 |
| Gogri | 06245 |
| Gopalganj | 06156 |
| H-Kharagpur | 06342 |
| Hajipur | 06224 |
| Hathua | 06150 |
| Hilsa | 06111 |
| Imamganj | 06331 |
| Jahanabad | 06114 |
| Jainagar | 06246 |
| Jamui | 06345 |
| Jhajha | 06349 |
| Jhajharpur | 06273 |
| Kahalgaon | 06429 |
| Katihar | 06452 |
| Katoria | 06425 |
| Khagaria | 06244 |
| Kishanganj | 06456 |
| Korha | 06457 |
| Lakhisarai | 06346 |
| Madhepura | 06476 |
| Madhubani | 06276 |
| Maharajganj | 06153 |
| Mahua | 06227 |
| Mairwa | 06157 |
| Mallehpur | 06348 |
| Marhaurah-Masrakh | 06159 |
| Mohania | 06187 |
| Monghyr | 06344 |
| Motihari | 06252 |
| Motipur | 06223 |
| Muzaffarpur | 0621 |
| Nabinagar | 06332 |
| Narkatiaganj | 06253 |
| Naugachia | 06421 |
| Nawada | 06324 |
| Pakribarwan | 06325 |
| Pakridayal | 06259 |
| Patna | 0612 |
| Phulparas | 06277 |
| Piro | 06181 |
| Pupri | 06228 |
| Purnea | 06454 |
| Rafiganj | 06327 |
| Rajauli | 06336 |
| Ramnagar | 06256 |
| Raniganj | 06461 |
| Raxaul | 06255 |
| Rohtas | 06188 |
| Rosera | 06275 |
| S-Bakhtiarpur | 06475 |
| Saharsa | 06478 |
| Samastipur | 06274 |
| Sasaram | 06184 |
| Seikhpura | 06341 |
| Sheohar | 06222 |
| Sherghati | 06326 |
| Sidhawalia | 06151 |
| Singhwara | 06247 |
| Sitamarhi | 06226 |
| Siwan | 06154 |
| Sonepur | 06158 |
| Supaul | 06473 |
| Thakurganj | 06459 |
| Triveniganj | 06477 |
| Udakishanganj | 06479 |
| Wazirganj | 06322 |