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| Prefix | City | Company | Line type | Open |
|---|---|---|---|---|
| 307 | North Billerica | Mcimetro Access Transmission Services Llc | Landline | View |
| 308 | Cambridge | Omnipoint Miami E License Llc | Wireless | View |
| 309 | Boston | Mcimetro Access Transmission Services Llc | Landline | View |
| 310 | Dedham | Verizon New England Inc. | Landline | View |
| 312 | Bedford | Rnk Inc. | Landline | View |
| 313 | Boston | Mcimetro Access Transmission Services Llc | Landline | View |
| 314 | Waltham | Verizon New England Inc. | Landline | View |
| 315 | North Billerica | Rcn Telecom Services Inc. - Ma | Landline | View |
| 316 | Boston | Rcn Telecom Services Inc. - Ma | Landline | View |
| 317 | Waltham | Verizon New England Inc. | Landline | View |
| 318 | Boston | Mcimetro Access Transmission Services Llc | Landline | View |
| 319 | Marshfield | Verizon New England Inc. | Landline | View |
| 320 | Dedham | Verizon New England Inc. | Landline | View |
| 321 | Malden | Verizon New England Inc. | Landline | View |
| 322 | Malden | Verizon New England Inc. | Landline | View |
| 323 | Boston | Global Crossing Local Services Inc.-ma | Landline | View |
| 324 | Malden | Verizon New England Inc. | Landline | View |
| 325 | Cambridge | Level 3 Communications Llc - Ma | Landline | View |
| 326 | Dedham | Verizon New England Inc. | Landline | View |
| 327 | Bedford | Rnk Inc. | Landline | View |
| 328 | Cambridge | Level 3 Communications Llc - Ma | Landline | View |
| 329 | Dedham | Verizon New England Inc. | Landline | View |
| 330 | Walpole | Sprint Spectrum L.p. | Wireless | View |
| 331 | East Weymouth | Verizon New England Inc. | Landline | View |
| 332 | Boston | Paetec Communications Inc. | Landline | View |
| 333 | Worcester | Conversent Communications Of Massachusetts Llc | Landline | View |
| 334 | Lynnfield | Verizon New England Inc. | Landline | View |
| 335 | East Weymouth | Verizon New England Inc. | Landline | View |
| 336 | Cambridge | Level 3 Communications Llc - Ma | Landline | View |
| 337 | East Weymouth | Verizon New England Inc. | Landline | View |
| 338 | Malden | Verizon New England Inc. | Landline | View |
| 340 | East Weymouth | Verizon New England Inc. | Landline | View |
| 341 | Stoughton | Verizon New England Inc. | Landline | View |
| 342 | Lynnfield | Verizon New England Inc. | Landline | View |
| 343 | Boston | Global Crossing Local Services Inc.-ma | Landline | View |
| 344 | Stoughton | Verizon New England Inc. | Landline | View |
| 345 | Cambridge | Xo Massachusetts Inc. | Landline | View |
| 346 | Norton | Conversent Communications Of Massachusetts Llc | Landline | View |
| 347 | Cambridge | Mcimetro Access Transmission Services Llc | Landline | View |
| 348 | Braintree | Verizon New England Inc. | Landline | View |
| 349 | Cambridge | Ctc Communications Corp. - Ma | Landline | View |
| 350 | Cambridge | Teleport Communications Group - Boston | Landline | View |
| 351 | Walpole | Sprint Spectrum L.p. | Wireless | View |
| 352 | Cambridge | Ctc Communications Corp. - Ma | Landline | View |
| 353 | Cambridge | Broadwing Communications Llc - Ma | Landline | View |
| 354 | Norton | Omnipoint Miami E License Llc | Wireless | View |
| 355 | Cambridge | At&t Local | Landline | View |
| 356 | Braintree | Verizon New England Inc. | Landline | View |
| 357 | Boston | Allegiance Telecom Inc. - Ma | Landline | View |
| 358 | Boston | Allegiance Telecom Inc. - Ma | Landline | View |
| 359 | Burlington | Verizon New England Inc. | Landline | View |
| 360 | Franklin | Norfolk County Internet Inc. | Landline | View |
| 361 | Avon | Rcn Telecom Services Inc. - Ma | Landline | View |
| 362 | Cambridge | Ctc Communications Corp. - Ma | Landline | View |
| 363 | Cambridge | Omnipoint Miami E License Llc | Wireless | View |
| 364 | Boston | Teleport Communications Group - Boston | Landline | View |
| 365 | Framingham | Comcast Phone Of Massachusetts Inc. - Ma | Landline | View |
| 366 | Cambridge | Mcimetro Access Transmission Services Llc | Landline | View |
| 367 | Woburn | Sprint Spectrum L.p. | Wireless | View |
| 368 | Winchester | Verizon New England Inc. | Landline | View |
| 369 | Framingham | Comcast Phone Of Massachusetts Inc. - Ma | Landline | View |
| 370 | Cambridge | Teleport Communications Group - Boston | Landline | View |
| 371 | Boston | Allegiance Telecom Inc. - Ma | Landline | View |
| 372 | Lexington | Verizon New England Inc. | Landline | View |
| 373 | Framingham | Comcast Phone Of Massachusetts Inc. - Ma | Landline | View |
| 374 | Cambridge | At&t Local | Landline | View |
| 375 | Boston | Teleport Communications Group - Boston | Landline | View |
| 376 | Winchester | Verizon New England Inc. | Landline | View |
| 377 | Lexington | Verizon New England Inc. | Landline | View |
| 378 | Chelmsford | Comcast Phone Of Massachusetts Inc. - Ma | Landline | View |
| 380 | Braintree | Verizon New England Inc. | Landline | View |
| 381 | Boston | Rcn Telecom Services Inc. - Ma | Landline | View |
| 382 | Bedford | Rnk Inc. | Landline | View |
| 383 | Hingham | Verizon New England Inc. | Landline | View |
| 384 | Bedford | Rnk Inc. | Landline | View |
| 385 | Walpole | Sprint Spectrum L.p. | Wireless | View |
| 386 | Boston | Verizon New England Inc. | Landline | View |
| 387 | Burlington | Verizon New England Inc. | Landline | View |
| 388 | Malden | Verizon New England Inc. | Landline | View |
| 389 | Boston | Sprint Spectrum L.p. | Wireless | View |
| 390 | Cambridge | Broadwing Communications Llc - Ma | Landline | View |
| 391 | Malden | Verizon New England Inc. | Landline | View |
| 392 | Waltham | Verizon New England Inc. | Landline | View |
| 393 | Malden | Verizon New England Inc. | Landline | View |
| 394 | Quincy | Global Naps Inc.-ma | Landline | View |
| 395 | Malden | Verizon New England Inc. | Landline | View |
| 396 | Malden | Verizon New England Inc. | Landline | View |
| 397 | Malden | Verizon New England Inc. | Landline | View |
| 398 | Waltham | Verizon New England Inc. | Landline | View |
| 399 | Cambridge | Level 3 Communications Llc - Ma | Landline | View |
| 400 | West Roxbury | Comcast Phone Of Massachusetts Inc. - Ma | Landline | View |
| 401 | Canton | Verizon New England Inc. | Landline | View |
| 402 | Lexington | Verizon New England Inc. | Landline | View |
| 404 | Cambridge | Ctc Communications Corp. - Ma | Landline | View |
| 405 | Woburn | Sprint Spectrum L.p. | Wireless | View |
| 406 | Cambridge | Teleport Communications Group - Boston | Landline | View |
| 407 | Dedham | Verizon New England Inc. | Landline | View |
| 408 | Walpole | Sprint Spectrum L.p. | Wireless | View |
| 409 | Waltham | Verizon New England Inc. | Landline | View |
| 410 | Boston | Mcimetro Access Transmission Services Llc | Landline | View |
This page provides detailed information and helpful insights related to your search. All data is based on telecom assignment records and community user reports. Use the navigation above to explore related area codes, prefixes, and reported numbers.