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| Prefix | City | Company | Line type | Open |
|---|---|---|---|---|
| 509 | Mansfield | Sprint Spectrum L.p. | Wireless | View |
| 510 | Framingham | Rcn Telecom Services Inc. - Ma | Landline | View |
| 513 | Worcester | Teleport Communications Group - Boston | Landline | View |
| 514 | Worcester | Conversent Communications Of Massachusetts Llc | Landline | View |
| 517 | Avon | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 518 | Worcester | Teleport Communications Group - Boston | Landline | View |
| 519 | Quincy | Global Naps Inc.-ma | Landline | View |
| 520 | Franklin | Verizon New England Inc. | Landline | View |
| 521 | Avon | Ctc Communications Corp. - Ma | Landline | View |
| 522 | Framingham | Verizon New England Inc. | Landline | View |
| 523 | Westborough | Cellco Partnership Dba Verizon Wireless - Ma | Wireless | View |
| 524 | Avon | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 525 | Walpole | Rcn Telecom Services Inc. - Ma | Landline | View |
| 526 | Quincy | Global Naps Inc.-ma | Landline | View |
| 527 | Avon | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 528 | Franklin | Verizon New England Inc. | Landline | View |
| 529 | Upton | Verizon New England Inc. | Landline | View |
| 530 | Acton | Mcimetro Access Transmission Services Llc | Landline | View |
| 531 | Boston | Paetec Communications Inc. | Landline | View |
| 532 | Boston | Paetec Communications Inc. | Landline | View |
| 533 | Medway | Verizon New England Inc. | Landline | View |
| 534 | Boston | Global Crossing Local Services Inc.-ma | Landline | View |
| 535 | Boston | Paetec Communications Inc. | Landline | View |
| 536 | Cambridge | Broadwing Communications Llc - Ma | Landline | View |
| 537 | Auburn | Verizon New England Inc. | Landline | View |
| 538 | Worcester | Conversent Communications Of Massachusetts Llc | Landline | View |
| 539 | Mashpee | Verizon New England Inc. | Landline | View |
| 540 | Falmouth | Verizon New England Inc. | Landline | View |
| 541 | Franklin | Verizon New England Inc. | Landline | View |
| 542 | Avon | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 543 | Foxboro | Verizon New England Inc. | Landline | View |
| 544 | Hopkinton | Verizon New England Inc. | Landline | View |
| 545 | Chelmsford | Comcast Phone Of Massachusetts Inc. - Ma | Landline | View |
| 546 | Quincy | Global Naps Inc.-ma | Landline | View |
| 547 | Franklin | Norfolk County Internet Inc. | Landline | View |
| 548 | Falmouth | Verizon New England Inc. | Landline | View |
| 549 | Foxboro | Verizon New England Inc. | Landline | View |
| 551 | Worcester | Verizon New England Inc. | Landline | View |
| 552 | Worcester | Choice One Communications - Ma | Landline | View |
| 553 | Franklin | Verizon New England Inc. | Landline | View |
| 556 | Bedford | Rnk Inc. | Landline | View |
| 557 | Foxboro | Comcast Phone Of Massachusetts Inc. - Ma | Landline | View |
| 558 | Walpole | Level 3 Communications Llc - Ma | Landline | View |
| 559 | Unknown | Verizon New England Inc. | Landline | View |
| 560 | Avon | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 561 | Westborough | Cellco Partnership Dba Verizon Wireless - Ma | Wireless | View |
| 562 | Boston | Global Crossing Local Services Inc.-ma | Landline | View |
| 563 | Cataumet | Verizon New England Inc. | Landline | View |
| 564 | Cataumet | Verizon New England Inc. | Landline | View |
| 565 | Easton | Verizon New England Inc. | Landline | View |
| 566 | Avon | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 567 | Chelmsford | Comcast Phone Of Massachusetts Inc. - Ma | Landline | View |
| 568 | Unknown | Ctc Communications Corp. - Ma | Landline | View |
| 569 | Worcester | Verizon New England Inc. | Landline | View |
| 570 | Cambridge | Level 3 Communications Llc - Ma | Landline | View |
| 571 | Worcester | Teleport Communications Group - Boston | Landline | View |
| 572 | Avon | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 573 | Acton | Mcimetro Access Transmission Services Llc | Landline | View |
| 574 | Avon | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 575 | Woburn | Nep Llc | Landline | View |
| 576 | Cambridge | Broadwing Communications Llc - Ma | Landline | View |
| 577 | Avon | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 578 | Unknown | Verizon New England Inc. | Landline | View |
| 579 | Walpole | Sprint Spectrum L.p. | Wireless | View |
| 580 | Unknown | Verizon New England Inc. | Landline | View |
| 581 | Millbury | Verizon New England Inc. | Landline | View |
| 582 | Franklin | Norfolk County Internet Inc. | Landline | View |
| 583 | Unknown | Verizon New England Inc. | Landline | View |
| 584 | Unknown | Verizon New England Inc. | Landline | View |
| 585 | Franklin | Norfolk County Internet Inc. | Landline | View |
| 586 | Unknown | Verizon New England Inc. | Landline | View |
| 587 | Unknown | Verizon New England Inc. | Landline | View |
| 588 | Unknown | Verizon New England Inc. | Landline | View |
| 589 | Cambridge | Xo Massachusetts Inc. | Landline | View |
| 590 | Quincy | Global Naps Inc.-ma | Landline | View |
| 591 | Worcester | At&t Local | Landline | View |
| 592 | Framingham | Verizon New England Inc. | Landline | View |
| 593 | Cambridge | Level 3 Communications Llc - Ma | Landline | View |
| 594 | Worcester | Teleport Communications Group - Boston | Landline | View |
| 595 | Worcester | Verizon New England Inc. | Landline | View |
| 596 | Avon | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 597 | Cambridge | Xo Massachusetts Inc. | Landline | View |
| 598 | Boston | Mcimetro Access Transmission Services Llc | Landline | View |
| 599 | Boston | Mcimetro Access Transmission Services Llc | Landline | View |
| 600 | Framingham | Verizon New England Inc. | Landline | View |
| 603 | Cambridge | Level 3 Communications Llc - Ma | Landline | View |
| 612 | Westborough | Cellco Partnership Dba Verizon Wireless - Ma | Wireless | View |
| 613 | Cambridge | Broadwing Communications Llc - Ma | Landline | View |
| 614 | Framingham | At&t Local | Landline | View |
| 615 | Norton | Omnipoint Miami E License Llc | Wireless | View |
| 616 | Westborough | Verizon New England Inc. | Landline | View |
| 617 | Chelmsford | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 618 | Cambridge | Xo Massachusetts Inc. | Landline | View |
| 619 | Cambridge | Level 3 Communications Llc - Ma | Landline | View |
| 620 | Framingham | Verizon New England Inc. | Landline | View |
| 621 | Worcester | Teleport Communications Group - Boston | Landline | View |
| 622 | Foxboro | Comcast Phone Of Massachusetts Inc. - Ma | Landline | View |
| 623 | Boston | Paetec Communications Inc. | Landline | View |
| 624 | Marlborough | Verizon New England Inc. | Landline | View |
| 625 | Chelmsford | Comcast Phone Of Massachusetts Inc. - Ma | 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.