Area Code 631 is located in the state of New York.
The New York`s major city is Huntington
The state of New York is in Eastern timezone.
More important cities in New York:
Bay Shore, NY; Brentwood, NY; Centereach, NY; Central Islip, NY; Commack, NY; Copiague, NY; Coram, NY; Deer Park, NY; Dix Hills, NY; East Northport, NY; East Patchogue, NY; Hauppauge, NY; Holbrook, NY; Huntington Station, NY; Islip, NY; Lindenhurst, NY; Medford, NY; Ronkonkoma, NY; Selden, NY; Shirley, NY; Smithtown, NY; West Babylon, NY; West Islip, NY;
Prefixes within the 631 Area Code what we have in our database.
| Prefix | Primary City | County | Usage |
| (631) 325 | Eastport, NY | Suffolk | Landline |
| (631) 326 | Commack, NY | Suffolk | Landline |
| (631) 327 | Huntington, NY | Suffolk | Cell Number |
| (631) 328 | Bay Shore, NY | Suffolk | Landline |
| (631) 329 | East Hampton, NY | Suffolk | Landline |
| (631) 331 | Port Jefferson, NY | Suffolk | Landline |
| (631) 332 | Brentwood, NY | Suffolk | Cell Number |
| (631) 333 | Greenport, NY | Not filled | Unknown |
| (631) 334 | Central Islip, NY | Suffolk | Cell Number |
| (631) 335 | Brentwood, NY | Suffolk | Cell Number |
| (631) 336 | Brentwood, NY | Not filled | Unknown |
| (631) 337 | Sayville, NY | Suffolk | Landline |
| (631) 338 | Brentwood, NY | Suffolk | Cell Number |
| (631) 339 | Brentwood, NY | Not filled | Unknown |
| (631) 340 | Babylon, NY | Suffolk | Cell Number |
| (631) 341 | Yaphank, NY | Suffolk | Landline |
| (631) 342 | Central Islip, NY | Suffolk | Landline |
| (631) 343 | Commack, NY | Suffolk | Landline |
| (631) 344 | Yaphank, NY | Suffolk | Landline |
| (631) 345 | Yaphank, NY | Suffolk | Landline |
| (631) 346 | Selden, NY | Not filled | Unknown |
| (631) 348 | Central Islip, NY | Suffolk | Landline |
| (631) 349 | Stony Brook, NY | Suffolk | Cell Number |
| (631) 350 | Westbury, NY | Nassau | Landline |
| (631) 351 | Huntington, NY | Suffolk | Landline |
| (631) 352 | Smithtown, NY | Not filled | Unknown |
| (631) 353 | Southampton, NY | Not filled | Unknown |
| (631) 354 | Mattituck, NY | Suffolk | Landline |
| (631) 355 | Brentwood, NY | Suffolk | Cell Number |
| (631) 356 | Brentwood, NY | Suffolk | Cell Number |
| (631) 357 | Brentwood, NY | Suffolk | Landline |
| (631) 358 | Babylon, NY | Not filled | Unknown |
| (631) 360 | Smithtown, NY | Suffolk | Landline |
| (631) 361 | Smithtown, NY | Suffolk | Landline |
| (631) 363 | Patchogue, NY | Suffolk | Landline |
| (631) 364 | Stony Brook, NY | Not filled | Unknown |
| (631) 365 | Brentwood, NY | Suffolk | Cell Number |
| (631) 366 | Smithtown, NY | Suffolk | Landline |
| (631) 367 | Cold Spring Harbor, NY | Suffolk | Landline |
| (631) 368 | Commack, NY | Suffolk | Landline |
| (631) 369 | Riverhead, NY | Suffolk | Landline |
| (631) 370 | Farmingdale, NY | Nassau | Landline |
| (631) 371 | St James, NY | Suffolk | Cell Number |
| (631) 372 | Not filled | Not filled | Unknown |
| (631) 373 | Brentwood, NY | Suffolk | Cell Number |
| (631) 374 | Brentwood, NY | Suffolk | Cell Number |
| (631) 375 | Riverhead, NY | Suffolk | Cell Number |
| (631) 376 | Babylon, NY | Suffolk | Landline |
| (631) 377 | Southampton, NY | Not filled | Unknown |
| (631) 378 | Shoreham, NY | Suffolk | Landline |
| (631) 379 | Brentwood, NY | Suffolk | Cell Number |
| (631) 380 | Huntington, NY | Suffolk | Landline |
| (631) 381 | Not filled | Suffolk | Landline |
| (631) 382 | Smithtown, NY | Suffolk | Landline |
| (631) 383 | Bay Shore, NY | Suffolk | Cell Number |
| (631) 384 | Selden, NY | Suffolk | Cell Number |
| (631) 385 | Huntington, NY | Suffolk | Landline |
| (631) 386 | Farmingdale, NY | Nassau | Landline |
| (631) 387 | Commack, NY | Suffolk | Landline |
| (631) 388 | Woodbury, NY | Not filled | Unknown |
| (631) 389 | Ronkonkoma, NY | Suffolk | Landline |
| (631) 390 | Farmingdale, NY | Nassau | Landline |
| (631) 391 | Farmingdale, NY | Nassau | Landline |
| (631) 392 | Deer Park, NY | Not filled | Unknown |
| (631) 393 | Farmingdale, NY | Nassau | Landline |
| (631) 394 | Yaphank, NY | Not filled | Unknown |
| (631) 395 | Mastic, NY | Suffolk | Landline |
| (631) 396 | Farmingdale, NY | Nassau | Landline |
| (631) 397 | Amityville, NY | Not filled | Unknown |
| (631) 398 | Brentwood, NY | Suffolk | Cell Number |
| (631) 399 | Mastic, NY | Suffolk | Landline |
| (631) 400 | Amityville, NY | Not filled | Unknown |
| (631) 403 | Port Jefferson, NY | Not filled | Unknown |
| (631) 404 | Brentwood, NY | Suffolk | Landline |
| (631) 405 | Riverhead, NY | Not filled | Unknown |
| (631) 406 | Smithtown, NY | Suffolk | Landline |
| (631) 407 | Southold, NY | Not filled | Unknown |
| (631) 409 | Wantagh, NY | Nassau | Landline |
| (631) 410 | Commack, NY | Suffolk | Landline |
| (631) 412 | Lindenhurst, NY | Suffolk | Landline |
| (631) 413 | Selden, NY | Not filled | Unknown |
| (631) 414 | Farmingdale, NY | Nassau | Landline |
| (631) 415 | Central Islip, NY | Suffolk | Landline |
| (631) 416 | Not filled | Not filled | Unknown |
| (631) 418 | Huntington, NY | Suffolk | Landline |
| (631) 419 | Sayville, NY | Suffolk | Landline |
| (631) 420 | Farmingdale, NY | Nassau | Landline |
| (631) 421 | Huntington, NY | Suffolk | Landline |
| (631) 422 | Babylon, NY | Suffolk | Landline |
| (631) 423 | Huntington, NY | Suffolk | Landline |
| (631) 424 | Huntington, NY | Suffolk | Landline |
| (631) 425 | Huntington, NY | Suffolk | Landline |
| (631) 426 | Babylon, NY | Suffolk | Cell Number |
| (631) 427 | Huntington, NY | Suffolk | Landline |
| (631) 428 | Huntington, NY | Suffolk | Cell Number |
| (631) 431 | Central Islip, NY | Suffolk | Cell Number |
| (631) 433 | Brentwood, NY | Suffolk | Cell Number |
| (631) 434 | Brentwood, NY | Suffolk | Landline |
| (631) 435 | Brentwood, NY | Suffolk | Landline |
| (631) 436 | Brentwood, NY | Suffolk | Landline |
We have 673 Prefixes in our database.