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Area Codes > 503 > Central Office Codes

Exchange Rate Center State Operating Company
503-505 PORTLAND OR INTEGRA TELECOM OF OREGON, INC. - OR
503-506 STFRD-SNDY OR AT&T LOCAL
503-507 SALEM OR CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR
503-508 SALEM OR BLUE LICENSES HOLDING, LLC
503-509 SALEM OR SCS COMMUNICATIONS AND SECURITY, INC. - OR
503-510 SALEM OR BLUE LICENSES HOLDING, LLC
503-511 OR
503-512 GRESHAM OR TIME WARNER TELECOM OF OREGON, LLC-OR
503-513 CLACKAMAS OR QWEST CORPORATION
503-514 PORTLAND OR ARCH WIRELESS HOLDINGS, INC.
503-515 PORTLAND OR T-MOBILE USA, INC.
503-516 PORTLAND OR T-MOBILE USA, INC.
503-517 PORTLAND OR INTEGRA TELECOM OF OREGON, INC. - OR
503-518 CLACKAMAS OR BEAVER CREEK COOPERATIVE TELEPHONE CO.
503-519 PORTLAND OR NEXTEL COMMUNICATIONS, INC.
503-520 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-521 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-522 PORTLAND OR CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR
503-523 BEAVERTON OR GLOBAL CROSSING LOCAL SERVICES,INC.-OR
503-524 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-525 PORTLAND OR QWEST CORPORATION
503-526 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-527 PORTLAND OR ARCH WIRELESS HOLDINGS, INC.
503-528 PORTLAND OR QWEST CORPORATION
503-529 PORTLAND OR ARCH WIRELESS HOLDINGS, INC.
503-530 BEAVERTON OR TELEPORT COMMUNICATIONS GROUP, INC. - OR
503-531 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-532 BEAVERTON OR MCIMETRO, ATS, INC.
503-533 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-534 CLACKAMAS OR QWEST CORPORATION
503-535 PORTLAND OR TELEPORT COMMUNICATIONS GROUP, INC. - OR
503-536 BEAVERTON OR GLOBAL CROSSING LOCAL SERVICES,INC.-OR
503-537 NEWBERG OR VERIZON NORTHWEST INC.-OR
503-538 NEWBERG OR VERIZON NORTHWEST INC.-OR
503-539 PORTLAND OR BLUE LICENSES HOLDING, LLC
503-540 SALEM OR QWEST CORPORATION
503-542 PORTLAND OR ESCHELON TELECOMM OF OREGON, INC. - OR
503-543 SCAPPOOSE OR CENTURYTEL OF OREGON, INC.
503-544 PORTLAND OR T-MOBILE USA, INC.
503-545 PORTLAND OR CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR
503-546 PORTLAND OR INTEGRA TELECOM OF OREGON, INC. - OR
503-547 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-548 PORTLAND OR ELECTRIC LIGHTWAVE, LLC DBA INTEGRA TELECOM - OR
503-549 BEAVERTON OR GLOBAL CROSSING LOCAL SERVICES,INC.-OR
503-550 NEWBERG OR BLUE LICENSES HOLDING, LLC
503-551 SALEM OR BLUE LICENSES HOLDING, LLC
503-552 PORTLAND OR QWEST CORPORATION
503-553 PORTLAND OR QWEST CORPORATION
503-554 NEWBERG OR VERIZON NORTHWEST INC.-OR
503-555 PORTLAND OR QWEST CORPORATION
503-556 RAINIER OR QWEST CORPORATION
503-557 CLACKAMAS OR QWEST CORPORATION
503-558 STFRD-SNDY OR VERIZON NORTHWEST INC.-OR
503-559 SALEM OR BLUE LICENSES HOLDING, LLC
503-560 MCMINNVL OR T-MOBILE USA, INC.
503-561 SALEM OR INTEGRA TELECOM OF OREGON, INC. - OR
503-562 SALEM OR INTEGRA TELECOM OF OREGON, INC. - OR
503-563 STFRD-SNDY OR GLOBAL CROSSING LOCAL SERVICES,INC.-OR
503-564 HOOD LAND OR LEVEL 3 COMMUNICATIONS, LLC - OR
503-565 MCMINNVL OR OREGON TEL, LLC - OR
503-566 SALEM OR QWEST CORPORATION
503-567 BEAVERTON OR GREAT WEST SERVICES, LTD. - OR
503-569 SALEM OR SPRINT SPECTRUM L.P.
503-570 STFRD-SNDY OR VERIZON NORTHWEST INC.-OR
503-571 CLACKAMAS OR QWEST CORPORATION
503-572 PORTLAND OR NEXTEL COMMUNICATIONS, INC.
503-573 GRESHAM OR GLOBAL CROSSING LOCAL SERVICES,INC.-OR
503-574 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-576 SALEM OR QWEST CORPORATION
503-577 PORTLAND OR CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR
503-578 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-579 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-580 SALEM OR BLUE LICENSES HOLDING, LLC
503-581 SALEM OR QWEST CORPORATION
503-582 STFRD-SNDY OR VERIZON NORTHWEST INC.-OR
503-584 SALEM OR QWEST CORPORATION
503-585 SALEM OR QWEST CORPORATION
503-586 SALEM OR ADVANCED TELCOM GROUP, INC. - OR
503-587 SALEM OR QWEST CORPORATION
503-588 SALEM OR QWEST CORPORATION
503-589 SALEM OR QWEST CORPORATION
503-590 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-591 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-592 CANBYNEEDY OR TIME WARNER TELECOM OF OREGON, LLC-OR
503-593 PORTLAND OR CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR
503-594 CLACKAMAS OR INTEGRA TELECOM OF OREGON, INC. - OR
503-595 PORTLAND OR ESCHELON TELECOMM OF OREGON, INC. - OR
503-596 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-597 BEAVERTON OR INTEGRA TELECOM OF OREGON, INC. - OR
503-598 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-599 PORTLAND OR ARCH WIRELESS HOLDINGS, INC.
503-601 BEAVERTON OR INTEGRA TELECOM OF OREGON, INC. - OR
503-602 SALEM OR SPRINT SPECTRUM L.P.
503-603 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-604 PORTLAND OR ARCH WIRELESS HOLDINGS, INC.
503-605 BEAVERTON OR VERIZON NORTHWEST INC.-OR
503-606 DALLAS OR QWEST CORPORATION
503-607 CLACKAMAS OR ESCHELON TELECOMM OF OREGON, INC. - OR
503-608 BEAVERTON OR TIME WARNER TELECOM OF OREGON, LLC-OR
503-609 CORBETT OR TIME WARNER TELECOM OF OREGON, LLC-OR