The STD codes of various cities and towns of Bihar are listed here.
| S.No | City | STD Code |
|---|---|---|
| 1. | Adhaura | 06180 |
| 2. | Adityapur | 0657 |
| 3. | Akbarnagar | 0641 |
| 4. | Akhagaon | 06182 |
| 5. | Akorhigola | 06184 |
| 6. | Amarpur | 0641 |
| 7. | Amarpur | 06420 |
| 8. | Andar | 06154 |
| 9. | Areraj | 06258 |
| 10. | Arrah | 06182 |
| 11. | Arraria | 06453 |
| 12. | Arwal | 06114 |
| 13. | Arwal | 06337 |
| 14. | Asarganj | 06342 |
| 15. | Asthawan | 06112 |
| 16. | Athmalgola | 06132 |
| 17. | Aura | 0653233 |
| 18. | Aurai | 0621 |
| 19. | Aurangabad | 06186 |
| 20. | Ayerkotha | 06184 |
| 21. | Azamnagar | 06452 |
| 22. | Bachaha | 0621 |
| 23. | Bagaha | 06251 |
| 24. | Baghmara | 0326 |
| 25. | Bagodar | 06557 |
| 26. | Bahadurganj | 06456 |
| 27. | Baijnathpur | 06478 |
| 28. | Bairgaina | 06226 |
| 29. | Baisi | 06454 |
| 30. | Baktrarpur | 06132 |
| 31. | Baliapur | 0326 |
| 32. | Balidih | 06542 |
| 33. | Baluahot | 06478 |
| 34. | Balwa | 06456 |
| 35. | Bangawan | 06478 |
| 36. | Baniapur | 06152 |
| 37. | Banka | 06424 |
| 38. | Banmankhi | 06467 |
| 39. | Banmanki | 06457 |
| 40. | Barachakia | 06257 |
| 41. | Barahi | 06543 |
| 42. | Baraipatti | 06156 |
| 43. | Barauli | 06156 |
| 44. | Barauni | 06279 |
| 45. | Barauni | 06343 |
| 46. | Barganj | 06344 |
| 47. | Barh | 06132 |
| 48. | Barhaiya | 06346 |
| 49. | Barharia | 06154 |
| 50. | Bariyarpur | 06344 |
| 51. | Barjamda | 065882 |
| 52. | Barosi | 06451 |
| 53. | Barsoni | 06454 |
| 54. | Barun | 06184 |
| 55. | Barwadih | 06567 |
| 56. | Baryare | 061887 |
| 57. | Basantpur | 06154 |
| 58. | Basia | 06533 |
| 59. | Basl | 0655375 |
| 60. | Baunsia | 06424 |
| 61. | Begusarai | 06243 |
| 62. | Begusarai | 06342 |
| 63. | Behia | 06181 |
| 64. | Behragora | 06594 |
| 65. | Bela | 0631 |
| 66. | Bengabad | 0653236 |
| 67. | Benipatti | 06271 |
| 68. | Benipur | 06242 |
| 69. | Bermo | 06549 |
| 70. | Bero | 06539 |
| 71. | Betla | 0656286 |
| 72. | Bettiah | 06254 |
| 73. | Bhabhua | 06189 |
| 74. | Bhagalpur | 0641 |
| 75. | Bhagwanpur | 0622485 |
| 76. | Bhapatia | 06478 |
| 77. | Bharichnagar | 0655387 |
| 78. | Bheldi | 06152 |
| 79. | Bhurkunda | 0655389 |
| 80. | Bidupur | 06229 |
| 81. | Biharsharif | 06112 |
| 82. | Bihat | 061352 |
| 83. | Bikram | 06135 |
| 84. | Bikramganj | 06185 |
| 85. | Bikramganj | 06385 |
| 86. | Bind | 06112 |
| 87. | Bisfi | 06276 |
| 88. | Bishanpur | 06456 |
| 89. | Bishunpur | 06342 |
| 90. | Bitho | 0631 |
| 91. | Bokaro | 06542 |
| 92. | Bokaro Steel | 06542 |
| 93. | Borsoi | 06452 |
| 94. | Bundu | 06530 |
| 95. | Buxar | 06183 |
| 96. | Chaibasa | 06582 |
| 97. | Chainpur | 06187 |
| 98. | Chakai | 06347 |
| 99. | Chakradharpur | 06587 |
| 100. | Chakund | 0631 |
| 101. | Chamho | 06535 |
| 102. | Champanagar | 06457 |
| 103. | Chandi | 06111 |
| 104. | Chandil | 06591 |
| 105. | Chandrapura | 0326 |
| 106. | Chandwa | 06565 |
| 107. | Charuadih | 0653236 |
| 108. | Chas | 06548 |
| 109. | Chatra | 06541 |
| 110. | Chauparan | 06547 |
| 111. | Chaupatia | 06254 |
| 112. | Chausa | 06183 |
| 113. | Chewara | 06341 |
| 114. | Chhapra | 06152 |
| 115. | Chhatarpur | 0656285 |
| 116. | Chhipaddhar | 0656288 |
| 117. | Chirkunda | 06552 |
| 118. | Dakra | 065365 |
| 119. | Dalmia Nagar | 06188 |
| 120. | Dalsingsarai | 06278 |
| 121. | Daltanganj | 06562 |
| 122. | Damodarpur | 06252 |
| 123. | Danapur | 0612 |
| 124. | Daniama | 06188 |
| 125. | Daniawan | 06112 |
| 126. | Darbanga | 06272 |
| 127. | Daudnagar | 06328 |
| 128. | Daudpur | 06152 |
| 129. | Deo | 06186 |
| 130. | Deoghar | 06432 |
| 131. | Dhabauli | 06478 |
| 132. | Dhaka | 06250 |
| 133. | Dhamdaha | 06452 |
| 134. | Dhamdaha | 06462 |
| 135. | Dhamouly | 06112 |
| 136. | Dhanbad | 0326 |
| 137. | Dholi | 0621 |
| 138. | Dhruva | 0651 |
| 139. | Digha Duhauli | 06156 |
| 140. | Dipnagar | 06112 |
| 141. | Doriganj | 06152 |
| 142. | Drmanjhi | 065176 |
| 143. | Dumka | 06434 |
| 144. | Dumraon | 06323 |
| 145. | Dumrawan | 06112 |
| 146. | Durgawati | 06187 |
| 147. | Dwarpahari | 0653238 |
| 148. | Ekangar Sarai | 06111 |
| 149. | Ekatha | 06277 |
| 150. | Ekma | 06152 |
| 151. | Ekma | 06155 |
| 152. | Falka | 06452 |
| 153. | Fatuha | 06112 |
| 154. | Fatwah | 06136 |
| 155. | Forbasganj | 06455 |
| 156. | Gamharia | 06476 |
| 157. | Garhwa | 06561 |
| 158. | Garia | 06532 |
| 159. | Garkha | 0615289 |
| 160. | Gaya | 0631 |
| 161. | Ghato Tand | 0654662 |
| 162. | Ghatsila | 06585 |
| 163. | Ghoghardiha | 062733 |
| 164. | Gidha | 06182 |
| 165. | Gidhaur | 06345 |
| 166. | Gioob | 0655372 |
| 167. | Giridih | 06532 |
| 168. | Giriyak | 06112 |
| 169. | Godda | 06422 |
| 170. | Goh | 06187 |
| 171. | Gola | 0655374 |
| 172. | Golma | 06478 |
| 173. | Gomia | 06549 |
| 174. | Gomoh | 0326 |
| 175. | Gonawan | 06112 |
| 176. | Gopalganj | 06156 |
| 177. | Goraru | 0631 |
| 178. | Gulabbagh | 06454 |
| 179. | Gumla | 06524 |
| 180. | Gurubazar | 06452 |
| 181. | Haldi Pokhar | 0657 |
| 182. | Harda | 06454 |
| 183. | Hariharganj | 065667 |
| 184. | Harnahi | 065526 |
| 185. | Harnaut | 06112 |
| 186. | Harsidhi | 06252 |
| 187. | Haspura | 06186 |
| 188. | Hathidah | 06133 |
| 189. | Hathua | 06150 |
| 190. | Hathyama | 06341 |
| 191. | Hawali Kharagpur | 06342 |
| 192. | Hazari Bagh | 06546 |
| 193. | Hazipur | 06224 |
| 194. | Hemzapur | 06344 |
| 195. | Hilsa | 06111 |
| 196. | Hinoo | 0651 |
| 197. | Ichak | 06548 |
| 198. | Imamganj | 06331 |
| 199. | Isipur | 06429 |
| 200. | Isri Bazar | 0653233 |
| 201. | Jadugoda | 065773 |
| 202. | Jagdishpur | 06181 |
| 203. | Jahanabad | 06114 |
| 204. | Jainagar | 06246 |
| 205. | Jairam Raghopur | 06473 |
| 206. | Jalalgarh | 06454 |
| 207. | Jalalpur | 06152 |
| 208. | Jalkauro | 06244 |
| 209. | Jamalpur | 06344 |
| 210. | Jamhore | 0618685 |
| 211. | Jamni | 06345 |
| 212. | Jamshedpur | 0657 |
| 213. | Jamsi | 0641 |
| 214. | Jamtara | 06433 |
| 215. | Jamtara | 064331 |
| 216. | Jamui | 06345 |
| 217. | Janakinagar | 06457 |
| 218. | Japla | 06566 |
| 219. | Jhajha | 06345 |
| 220. | Jhajha | 06349 |
| 221. | Jhandapur | 06421 |
| 222. | Jhanjharpur | 06273 |
| 223. | Jharia | 0326 |
| 224. | Jhikpani | 06589 |
| 225. | Jhumri Tillaiya | 06534 |
| 226. | Jogbani | 06455 |
| 227. | Jokihat | 06452 |
| 228. | Kahalgaon | 06429 |
| 229. | Kamtaul | 062728 |
| 230. | Kanke | 0651 |
| 231. | Kapasia | 06478 |
| 232. | Karakat | 06385 |
| 233. | Karba | 06454 |
| 234. | Karikbazar | 06421 |
| 235. | Karma | 0621 |
| 236. | Katihar | 06452 |
| 237. | Katoria | 06425 |
| 238. | Katras | 0326 |
| 239. | Katrisarai | 06112 |
| 240. | Khagaria | 06244 |
| 241. | Khaja | 06454 |
| 242. | Laheria Saria | 06272 |
| 243. | Lakhisarai | 06346 |
| 244. | Lakminia | 06342 |
| 245. | Lalgang | 0622487 |
| 246. | Latehar | 06565 |
| 247. | Lesligang | 0656282 |
| 248. | Loharoaga | 06526 |
| 249. | Loyabed | 0326 |
| 250. | Maculaskiganj | 06535 |
| 251. | Madhepura | 06476 |
| 252. | Madhuban | 0653232 |
| 253. | Madhubani | 06276 |
| 254. | Madhupur | 06438 |
| 255. | Madnichowki | 06346 |
| 256. | Maharajganj | 06153 |
| 257. | Maheshkhut | 06244 |
| 258. | Maheshmunda | 0653237 |
| 259. | Mahua | 0622483 |
| 260. | Mahua | 06227 |
| 261. | Maina | 06478 |
| 262. | Mairwa | 06157 |
| 263. | Majegain | 06342 |
| 264. | Majhagarh | 06156 |
| 265. | Makhdoompur | 06114 |
| 266. | Mallehpur | 06345 |
| 267. | Mallehpur | 06348 |
| 268. | Mandar | 06535 |
| 269. | Maner | 06115 |
| 270. | Maner | 06135 |
| 271. | Manihari | 06452 |
| 272. | Manjhi | 06152 |
| 273. | Mansi | 06244 |
| 274. | Marhaurah | 06152 |
| 275. | Masauri | 06129 |
| 276. | Masrakh | 06159 |
| 277. | Masubani | 06485 |
| 278. | Mathurapur | 06429 |
| 279. | Medanpur | 06186 |
| 280. | Meghatugun | 065884 |
| 281. | Mehus | 06341 |
| 282. | Meru | 06546368 |
| 283. | Mesra | 065172 |
| 284. | Mirajpur | 06478 |
| 285. | Mirganj | 0615682 |
| 286. | Mirjaganj | 0653234 |
| 287. | Mohania | 06187 |
| 288. | Mokhamah | 06133 |
| 289. | Monghyr | 06344 |
| 290. | Moraliganj | 064764 |
| 291. | Motihari | 06252 |
| 292. | Motipur | 06223 |
| 293. | Murhu | 06528 |
| 294. | Murhu | 06538 |
| 295. | Muri | 06522 |
| 296. | Murliganj | 064764 |
| 297. | Mushari Ghasari | 06274 |
| 298. | Muzzafarpur | 0621 |
| 299. | Nabinagar | 06186 |
| 300. | Nabinagar | 06332 |
| 301. | Nagaruntari | 06564 |
| 302. | Nagra | 06152 |
| 303. | Nagri | 0651756 |
| 304. | Nalanda | 061194 |
| 305. | Namkum | 0651 |
| 306. | Narainpur | 06182 |
| 307. | Narainpur | 06421 |
| 308. | Narkatiaganj | 06253 |
| 309. | Narwa Pahar | 0657 |
| 310. | Natwar | 06385 |
| 311. | Naugachia | 06421 |
| 312. | Nauhata | 06478 |
| 313. | Nayagaon | 06152 |
| 314. | Nechua Zalalpur | 06156 |
| 315. | Nirmali | 062732 |
| 316. | Noamundi | 065883 |
| 317. | Nokha | 06184 |
| 318. | Noor Sarai | 06112 |
| 319. | Pachdohi | 0621 |
| 320. | Pachgachia | 06478 |
| 321. | Pakridayal | 06259 |
| 322. | Pakur | 06435 |
| 323. | Paliganj | 06135 |
| 324. | Palkot | 06527 |
| 325. | Pandarak | 06132 |
| 326. | Pandra | 0651 |
| 327. | Paraiya | 0631 |
| 328. | Parsa | 06152 |
| 329. | Parwalpur | 06112 |
| 330. | Pataratu | 0655386 |
| 331. | Patna | 0612 |
| 332. | Pattam | 06344 |
| 333. | Pausa | 062753 |
| 334. | Pawai | 06186 |
| 335. | Pawapuri | 061195 |
| 336. | Phulpras | 06277 |
| 337. | Piperwar | 06535 |
| 338. | Piprakotta | 06252 |
| 339. | Piro | 06182 |
| 340. | Pirpanti | 064363 |
| 341. | Poiwan | 06186 |
| 342. | Punpun | 0612 |
| 343. | Pupri | 0622684 |
| 344. | Pupri | 06228 |
| 345. | Puraini | 0641 |
| 346. | Purnia | 06454 |
| 347. | Pusa | 062753 |
| 348. | Pusauli | 06187 |
| 349. | Rahui | 06112 |
| 350. | Rai Ranchi | 06535 |
| 351. | Raipur Chaur | 06184 |
| 352. | Rajauli | 06325 |
| 353. | Rajauli | 06336 |
| 354. | Rajdhanwar | 06554 |
| 355. | Rajgir | 06112 |
| 356. | Rajgir | 061192 |
| 357. | Rajiganj | 06327 |
| 358. | Rajrappa | 0655373 |
| 359. | Ramgarh | 06187 |
| 360. | Ramgarh | 06346 |
| 361. | Ramgarh | 06553 |
| 362. | Ramgarh Rohtas | 061811 |
| 363. | Ramnagar | 06256 |
| 364. | Rampur | 06184 |
| 365. | Rampur | 06346 |
| 366. | Ranchi | 0651 |
| 367. | Raniganj | 06455 |
| 368. | Raniganj | 06461 |
| 369. | Rankaraj | 06561 |
| 370. | Ranta | 06454 |
| 371. | Raxaul | 06255 |
| 372. | Rehla | 06584 |
| 373. | Rehlan | 0656283 |
| 374. | Ribilganj | 06152 |
| 375. | Rohua Lutriyahi | 06478 |
| 376. | Rosera | 06275 |
| 377. | Rosera | 062751 |
| 378. | Runisaidpur | 06226 |
| 379. | S.Bakhtiarpur | 06475 |
| 380. | Sabaur | 0641 |
| 381. | Saharsa | 06478 |
| 382. | Sahebganj | 06436 |
| 383. | Saidpur | 06421 |
| 384. | Sakri | 06276 |
| 385. | Salempur | 06132 |
| 386. | Salmari | 06452 |
| 387. | Samastipur | 06274 |
| 388. | Sandesh | 06182 |
| 389. | Sangrampur | 06344 |
| 390. | Sarai | 0622486 |
| 391. | Saria | 06557 |
| 392. | Sarmera | 06112 |
| 393. | Sasaram | 06184 |
| 394. | Saur Bazar | 06478 |
| 395. | Seimens | 0651 |
| 396. | Semapar | 06452 |
| 397. | Shahjadpur | 0641 |
| 398. | Shahpur | 06181 |
| 399. | Shapur | 06181 |
| 400. | Sharij | 0631 |
| 401. | Shashamosa | 06156 |
| 402. | Sheohar | 06222 |
| 403. | Sherghati | 06326 |
| 404. | Shivsagar | 06184 |
| 405. | Shultanganj | 06423 |
| 406. | Sidhawalia | 06151 |
| 407. | Sidhawalia | 06156 |
| 408. | Silao | 06112 |
| 409. | Simdegaa | 06525 |
| 410. | Simra | 061246 |
| 411. | Simra | 06186 |
| 412. | Sindri | 06544 |
| 413. | Singheshwar | 06476 |
| 414. | Singhwara | 06247 |
| 415. | Singhwara | 06272 |
| 416. | Sinhdih | 0326 |
| 417. | Sitamarhi | 06226 |
| 418. | Siwan | 06154 |
| 419. | Sonahatu | 06530 |
| 420. | Sonali | 06452 |
| 421. | Sonepur | 06158 |
| 422. | Sugauli | 06252 |
| 423. | Sultanganj | 0641 |
| 424. | Supaul | 06473 |
| 425. | Surajgawha | 06346 |
| 426. | Taitisilwai | 065171 |
| 427. | Tajpur | 062752 |
| 428. | Tamar | 06530 |
| 429. | Taraiyan | 06152 |
| 430. | Tarapur | 06344 |
| 431. | Tehta | 06114 |
| 432. | Tekari | 0631 |
| 433. | Telco | 0657 |
| 434. | Thakurganj | 06459 |
| 435. | Thakurgaon | 06546 |
| 436. | Thawe | 06156 |
| 437. | Tilauthu | 06188 |
| 438. | Topchachi | 0326 |
| 439. | Torpa | 06538 |
| 440. | Toto | 06524 |
| 441. | Triveniganj | 06471 |
| 442. | Triveniganj | 06477 |
| 443. | Tsrspur | 06342 |
| 444. | Turkaulia | 06252 |
| 445. | Turki | 0621 |
| 446. | Udakishanganj | 06474 |
| 447. | Udakishanganj | 06479 |
| 448. | Udawantnagar | 06182 |
| 449. | Uraini | 06474 |
| 450. | Vaishali | 06225 |
| 451. | Warsaliganj | 06324 |
| 452. | Wazirganj | 06322 |
| 453. | Zeeradei | 06154 |
STD (Subscriber Trunk Dialling) is a telephone numbering system that permits subscribers to dial trunk calls without operator's help. The term STD was introduced when it first became possible for making domestic long distance calls. Area codes are used to identify the location of the subscriber telephone connection. Area codes are preceded by a '0'. The '0' is an India's NDD (national direct dialing) code used for making statewide domestic calls. If you are dialing an inbound international call and phone number starts with '0', then you will need to remove that '0 '.