AdSense placeholder
Paste your AdSense script + ad units in src/layout_bottom.php, then set $ads_enabled = true.
Home / Area 312
Ad slot (sidebar)
Ad Unit
Place a vertical ad here.| Prefix | City | Company | Line type | Open |
|---|---|---|---|---|
| 525 | Bensenville | Mcimetro Access Transmission Services Llc | Landline | View |
| 526 | Chicago | Ameritech Illinois | Landline | View |
| 527 | Chicago | Ameritech Illinois | Landline | View |
| 528 | Chicago | Ameritech Illinois | Landline | View |
| 529 | Chicago | At&t Local | Landline | View |
| 530 | Hinsdale | Usa Mobility Wireless Inc. | Wireless | View |
| 531 | Willowbrook | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 532 | Chicago | T-mobile Usa Inc. | Wireless | View |
| 533 | Elgin | Cellco Partnership Dba Verizon Wireless - Il | Wireless | View |
| 534 | Chicago | Ameritech Illinois | Landline | View |
| 537 | Chicago | Ameritech Illinois | Landline | View |
| 540 | Chicago | Ameritech Illinois | Landline | View |
| 541 | Chicago | Ameritech Illinois | Landline | View |
| 542 | Chicago | Ameritech Illinois | Landline | View |
| 543 | Willowbrook | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 544 | Chicago | Ameritech Illinois | Landline | View |
| 545 | Bridgeview | Sprint Spectrum L.p. | Wireless | View |
| 546 | Chicago | Level 3 Communications Llc - Il | Landline | View |
| 547 | Chicago | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 548 | Chicago | Broadwing Communications Llc - Il | Landline | View |
| 550 | Elgin | Cellco Partnership Dba Verizon Wireless - Il | Wireless | View |
| 551 | Chicago | Ameritech Illinois | Landline | View |
| 552 | Chicago | Ameritech Illinois | Landline | View |
| 553 | Chicago | Ameritech Illinois | Landline | View |
| 554 | Chicago | Ameritech Illinois | Landline | View |
| 556 | Chicago | Ameritech Illinois | Landline | View |
| 557 | Chicago | Ameritech Illinois | Landline | View |
| 558 | Chicago | Ameritech Illinois | Landline | View |
| 559 | Chicago | Ameritech Illinois | Landline | View |
| 560 | Willowbrook | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 561 | Bridgeview | Cellco Partnership Dba Verizon Wireless - Il | Wireless | View |
| 562 | Hinsdale | Usa Mobility Wireless Inc. | Wireless | View |
| 563 | Chicago | Ameritech Illinois | Landline | View |
| 564 | Chicago | Cimco Communications Inc. - Il | Landline | View |
| 565 | Chicago | Ameritech Illinois | Landline | View |
| 566 | Chicago | Ameritech Illinois | Landline | View |
| 567 | Chicago | Ameritech Illinois | Landline | View |
| 568 | Chicago | Ameritech Illinois | Landline | View |
| 569 | Chicago | Ameritech Illinois | Landline | View |
| 570 | Chicago | Ameritech Illinois | Landline | View |
| 571 | Hinsdale | Usa Mobility Wireless Inc. | Wireless | View |
| 572 | Chicago | Ameritech Illinois | Landline | View |
| 573 | Chicago | Ameritech Illinois | Landline | View |
| 574 | Chicago | Ameritech Illinois | Landline | View |
| 575 | Chicago | Ameritech Illinois | Landline | View |
| 576 | Willowbrook | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 577 | Elk Grove Village | Mci Worldcom Communications Inc. - Il | Landline | View |
| 578 | Chicago | Ameritech Illinois | Landline | View |
| 580 | Chicago | Ameritech Illinois | Landline | View |
| 582 | Chicago | Ameritech Illinois | Landline | View |
| 583 | Chicago | Ameritech Illinois | Landline | View |
| 585 | Bensenville | Mcimetro Access Transmission Services Llc | Landline | View |
| 587 | Chicago | Ameritech Illinois | Landline | View |
| 588 | Chicago | Ameritech Illinois | Landline | View |
| 589 | Chicago | Ameritech Illinois | Landline | View |
| 590 | Elgin | Cellco Partnership Dba Verizon Wireless - Il | Wireless | View |
| 591 | Chicago | Ameritech Illinois | Landline | View |
| 592 | Chicago | Ameritech Illinois | Landline | View |
| 593 | Chicago | T-mobile Usa Inc. | Wireless | View |
| 594 | Bensenville | Mcimetro Access Transmission Services Llc | Landline | View |
| 595 | Chicago | Ameritech Illinois | Landline | View |
| 596 | Chicago | Teleport Communications America Llc - Il | Landline | View |
| 600 | Chicago | Cygnus Telecommunications Corporation - Il | Landline | View |
| 601 | Bensenville | Mcimetro Access Transmission Services Llc | Landline | View |
| 602 | Chicago | Broadwing Communications Llc - Il | Landline | View |
| 603 | Chicago | Ameritech Illinois | Landline | View |
| 604 | Wood Dale | Xo Illinois Inc. | Landline | View |
| 605 | Chicago | Ovation Communications Of Illinois Inc. | Landline | View |
| 606 | Chicago | Ameritech Illinois | Landline | View |
| 607 | Willowbrook | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 608 | Willowbrook | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 609 | Chicago | Ameritech Illinois | Landline | View |
| 610 | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless | View |
| 612 | Chicago | Ameritech Illinois | Landline | View |
| 613 | Willowbrook | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 614 | Chicago | Ameritech Illinois | Landline | View |
| 615 | Schaumburg | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 616 | Chicago | Ameritech Illinois | Landline | View |
| 617 | Buffalo Grove | Sprint Spectrum L.p. | Wireless | View |
| 618 | Willowbrook | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 619 | Chicago | T-mobile Usa Inc. | Wireless | View |
| 620 | Chicago | Bandwidth.com Clec Llc - Il | Landline | View |
| 621 | Chicago | Ameritech Illinois | Landline | View |
| 622 | Willowbrook | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 623 | Willowbrook | New Cingular Wireless Pcs Llc - Il | Wireless | View |
| 624 | Chicago | Rcn Telecom Services Of Illinois Inc. - Il | Landline | View |
| 625 | Oak Brook | Global Naps Inc. - Il | Landline | View |
| 626 | Chicago | Broadvox-clec Llc - Il | Landline | View |
| 627 | Chicago | Ameritech Illinois | Landline | View |
| 628 | Chicago | Xo Illinois Inc. | Landline | View |
| 629 | Chicago | Ameritech Illinois | Landline | View |
| 630 | Chicago | Ameritech Illinois | Landline | View |
| 631 | Bridgeview | Qwest Communications Company Llc | Landline | View |
| 632 | Chicago | Ameritech Illinois | Landline | View |
| 633 | Chicago | Ameritech Illinois | Landline | View |
| 634 | Chicago | Ameritech Illinois | Landline | View |
| 635 | Chicago | Global Crossing Local Services Inc.-il | Landline | View |
| 636 | Elgin | Cellco Partnership Dba Verizon Wireless - Il | Wireless | View |
| 637 | Chicago | Broadwing Communications Llc - Il | Landline | View |
| 638 | Chicago | Broadwing Communications Llc - Il | Landline | View |
Page Overview
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.
© 2026 Phone Directory.
Light theme (AdSense-ready).