Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
PORTLAND prefixes in area code 503
NANPA records 347 assigned NXX blocks to rate center PORTLAND in area code 503, 44.3% of the 784 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 16 holders hold those blocks, the largest being QWEST CORPORATION (145), NEW CINGULAR WIRELESS PCS, LLC (55), T-MOBILE USA, INC. (40). The earliest assignment on record here is 2002-04-25 and the most recent 2009-08-28. 124 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 207, 260, 517, 570 – overlay codes cover the same geography, so a rate center is served by all of them.
347 assigned blocks – 44.3% of 503
16 holders of record
124 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 503-200 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2006-10-17 | yes | yes |
| 503-201 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-202 | Spok SPOK, INC. | – | no | yes |
| 503-203 | Lumen QWEST CORPORATION | – | no | yes |
| 503-204 | Spok SPOK, INC. | – | no | yes |
| 503-205 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 503-206 | Onvoy ONVOY, LLC - OR | 2006-03-13 | yes | yes |
| 503-208 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2008-10-27 | yes | yes |
| 503-209 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-215 | Lumen QWEST CORPORATION | – | no | yes |
| 503-216 | Lumen QWEST CORPORATION | – | no | yes |
| 503-219 | Lumen QWEST CORPORATION | – | no | yes |
| 503-220 | Lumen QWEST CORPORATION | – | no | yes |
| 503-221 | Lumen QWEST CORPORATION | – | no | yes |
| 503-222 | Lumen QWEST CORPORATION | – | no | yes |
| 503-223 | Lumen QWEST CORPORATION | – | no | yes |
| 503-224 | Lumen QWEST CORPORATION | – | no | yes |
| 503-225 | Lumen QWEST CORPORATION | – | no | yes |
| 503-226 | Lumen QWEST CORPORATION | – | no | yes |
| 503-227 | Lumen QWEST CORPORATION | – | no | yes |
| 503-228 | Lumen QWEST CORPORATION | – | no | yes |
| 503-229 | Lumen QWEST CORPORATION | – | no | yes |
| 503-230 | Lumen QWEST CORPORATION | – | no | yes |
| 503-231 | Lumen QWEST CORPORATION | – | no | yes |
| 503-232 | Lumen QWEST CORPORATION | – | no | yes |
| 503-233 | Lumen QWEST CORPORATION | – | no | yes |
| 503-234 | Lumen QWEST CORPORATION | – | no | yes |
| 503-235 | Lumen QWEST CORPORATION | – | no | yes |
| 503-236 | Lumen QWEST CORPORATION | – | no | yes |
| 503-237 | Spok SPOK, INC. | – | no | yes |
| 503-238 | Lumen QWEST CORPORATION | – | no | yes |
| 503-239 | Lumen QWEST CORPORATION | – | no | yes |
| 503-240 | Lumen QWEST CORPORATION | – | no | yes |
| 503-241 | Lumen QWEST CORPORATION | – | no | yes |
| 503-242 | Lumen QWEST CORPORATION | – | no | yes |
| 503-243 | Lumen QWEST CORPORATION | – | no | yes |
| 503-244 | Lumen QWEST CORPORATION | – | no | yes |
| 503-245 | Lumen QWEST CORPORATION | – | no | yes |
| 503-246 | Lumen QWEST CORPORATION | – | no | yes |
| 503-247 | Lumen QWEST CORPORATION | – | no | yes |
| 503-248 | Lumen QWEST CORPORATION | – | no | yes |
| 503-249 | Lumen QWEST CORPORATION | – | no | yes |
| 503-250 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-251 | Lumen QWEST CORPORATION | – | no | yes |
| 503-252 | Lumen QWEST CORPORATION | – | no | yes |
| 503-253 | Lumen QWEST CORPORATION | – | no | yes |
| 503-254 | Lumen QWEST CORPORATION | – | no | yes |
| 503-255 | Lumen QWEST CORPORATION | – | no | yes |
| 503-256 | Lumen QWEST CORPORATION | – | no | yes |
| 503-257 | Lumen QWEST CORPORATION | – | no | yes |
| 503-258 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-260 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-261 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-262 | Lumen QWEST CORPORATION | – | no | yes |
| 503-265 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - OR | – | yes | yes |
| 503-267 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-271 | Spok SPOK, INC. | – | no | yes |
| 503-273 | Lumen QWEST CORPORATION | – | no | yes |
| 503-274 | Lumen QWEST CORPORATION | – | no | yes |
| 503-275 | Lumen QWEST CORPORATION | – | no | yes |
| 503-276 | Lumen QWEST CORPORATION | – | no | yes |
| 503-278 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2008-08-05 | yes | yes |
| 503-279 | Lumen QWEST CORPORATION | – | no | yes |
| 503-280 | Lumen QWEST CORPORATION | – | no | yes |
| 503-281 | Lumen QWEST CORPORATION | – | no | yes |
| 503-282 | Lumen QWEST CORPORATION | – | no | yes |
| 503-283 | Lumen QWEST CORPORATION | – | no | yes |
| 503-284 | Lumen QWEST CORPORATION | – | no | yes |
| 503-285 | Lumen QWEST CORPORATION | – | no | yes |
| 503-286 | Lumen QWEST CORPORATION | – | no | yes |
| 503-287 | Lumen QWEST CORPORATION | – | no | yes |
| 503-288 | Lumen QWEST CORPORATION | – | no | yes |
| 503-289 | Lumen QWEST CORPORATION | – | no | yes |
| 503-290 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 503-291 | Lumen QWEST CORPORATION | – | no | yes |
| 503-292 | Lumen QWEST CORPORATION | – | no | yes |
| 503-293 | Lumen QWEST CORPORATION | – | no | yes |
| 503-294 | Lumen QWEST CORPORATION | – | no | yes |
| 503-295 | Lumen QWEST CORPORATION | – | no | yes |
| 503-296 | Lumen QWEST CORPORATION | – | no | yes |
| 503-297 | Lumen QWEST CORPORATION | – | no | yes |
| 503-299 | Lumen QWEST CORPORATION | – | no | yes |
| 503-301 | Spok SPOK, INC. | – | no | yes |
| 503-306 | Lumen QWEST CORPORATION | – | no | yes |
| 503-307 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-309 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-310 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-312 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-313 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-314 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-317 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-318 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-319 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-320 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-321 | Lumen QWEST CORPORATION | – | no | yes |
| 503-323 | Lumen QWEST CORPORATION | – | no | yes |
| 503-326 | Lumen QWEST CORPORATION | – | no | yes |
| 503-327 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - OR | – | yes | yes |
| 503-329 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-331 | Lumen QWEST CORPORATION | – | no | yes |
| 503-333 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2006-09-21 | yes | yes |
| 503-334 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-335 | Lumen QWEST CORPORATION | – | no | yes |
| 503-340 | Lumen QWEST CORPORATION | – | no | yes |
| 503-341 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-345 | Lumen LEVEL 3 COMMUNICATIONS, LLC - OR | – | yes | yes |
| 503-346 | Lumen QWEST CORPORATION | – | no | yes |
| 503-347 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-348 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-349 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-351 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-358 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-360 | Onvoy ONVOY, LLC - OR | 2007-10-08 | yes | yes |
| 503-367 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2004-12-08 | yes | yes |
| 503-380 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-381 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-382 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - OR | – | yes | yes |
| 503-384 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-388 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2009-04-06 | yes | yes |
| 503-401 | Lumen QWEST CORPORATION | – | no | yes |
| 503-402 | Lumen QWEST CORPORATION | – | no | yes |
| 503-407 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-408 | Lumen QWEST CORPORATION | – | no | yes |
| 503-412 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-413 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-414 | Lumen QWEST CORPORATION | – | no | yes |
| 503-415 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-416 | Lumen LEVEL 3 TELECOM OF OREGON, LLC - OR | – | no | yes |
| 503-417 | Lumen QWEST CORPORATION | – | no | yes |
| 503-418 | Lumen QWEST CORPORATION | – | no | yes |
| 503-419 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 503-421 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-422 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-423 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-425 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-426 | NORTH COUNTY COMMUNICATION CORPORATION - OR | – | no | yes |
| 503-432 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - OR | – | yes | yes |
| 503-441 | Lumen QWEST CORPORATION | – | no | yes |
| 503-442 | T-Mobile T-MOBILE USA, INC. | 2005-01-26 | yes | yes |
| 503-444 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 503-445 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 503-446 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2009-07-01 | yes | yes |
| 503-449 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-450 | Lumen QWEST CORPORATION | – | no | yes |
| 503-452 | Lumen QWEST CORPORATION | – | no | yes |
| 503-453 | Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | – | yes | yes |
| 503-459 | Lumen LEVEL 3 TELECOM OF OREGON, LLC - OR | 2002-04-25 | yes | yes |
| 503-460 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-464 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-467 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 503-471 | Lumen QWEST CORPORATION | – | no | yes |
| 503-473 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 503-475 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-477 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2006-12-19 | yes | yes |
| 503-478 | Lumen QWEST CORPORATION | – | no | yes |
| 503-481 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-484 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - OR | – | yes | yes |
| 503-488 | Lumen LEVEL 3 TELECOM OF OREGON, LLC - OR | – | yes | yes |
| 503-490 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-493 | Lumen QWEST CORPORATION | – | no | yes |
| 503-494 | Lumen QWEST CORPORATION | – | no | yes |
| 503-497 | Lumen QWEST CORPORATION | – | no | yes |
| 503-499 | Lumen QWEST CORPORATION | – | no | yes |
| 503-500 | Charter ONVOY SPECTRUM, LLC | 2009-04-06 | yes | yes |
| 503-501 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2008-03-10 | yes | yes |
| 503-502 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-504 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-505 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 2008-06-03 | yes | yes |
| 503-514 | Spok SPOK, INC. | – | no | yes |
| 503-515 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-516 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-517 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | no | yes |
| 503-519 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-522 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-525 | Lumen QWEST CORPORATION | – | no | yes |
| 503-527 | Spok SPOK, INC. | – | no | yes |
| 503-528 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-529 | Spok SPOK, INC. | – | no | yes |
| 503-535 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - OR | – | yes | yes |
| 503-539 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-542 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 503-544 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-545 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2005-09-22 | yes | yes |
| 503-546 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | no | yes |
| 503-548 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 503-552 | Lumen QWEST CORPORATION | – | no | yes |
| 503-553 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-568 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2008-08-21 | yes | yes |
| 503-572 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-575 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2008-11-18 | yes | yes |
| 503-577 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-593 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2005-11-14 | yes | yes |
| 503-595 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | no | yes |
| 503-599 | Spok SPOK, INC. | – | no | yes |
| 503-604 | Spok SPOK, INC. | – | no | yes |
| 503-621 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-679 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-680 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-688 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 503-701 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-702 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-703 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-704 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-705 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-706 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-708 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-709 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-715 | Lumen LEVEL 3 COMMUNICATIONS, LLC - OR | – | yes | yes |
| 503-719 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2008-04-22 | yes | yes |
| 503-720 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-721 | Lumen QWEST CORPORATION | – | no | yes |
| 503-724 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2006-08-08 | yes | yes |
| 503-725 | Lumen QWEST CORPORATION | – | no | yes |
| 503-727 | Lumen QWEST CORPORATION | – | no | yes |
| 503-729 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2006-10-23 | yes | yes |
| 503-730 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-731 | Lumen QWEST CORPORATION | – | no | yes |
| 503-733 | Lumen QWEST CORPORATION | – | no | yes |
| 503-734 | Lumen LEVEL 3 TELECOM OF OREGON, LLC - OR | – | yes | yes |
| 503-735 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-736 | Lumen QWEST CORPORATION | – | no | yes |
| 503-737 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-740 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-745 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 503-750 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-752 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-753 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-754 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-756 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-757 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-758 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2005-08-16 | yes | yes |
| 503-760 | Lumen QWEST CORPORATION | – | no | yes |
| 503-761 | Lumen QWEST CORPORATION | – | no | yes |
| 503-762 | Lumen QWEST CORPORATION | – | no | yes |
| 503-764 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 2005-10-12 | yes | yes |
| 503-768 | Lumen QWEST CORPORATION | – | no | yes |
| 503-771 | Lumen QWEST CORPORATION | – | no | yes |
| 503-772 | Lumen QWEST CORPORATION | – | no | yes |
| 503-774 | Lumen QWEST CORPORATION | – | no | yes |
| 503-775 | Lumen QWEST CORPORATION | – | no | yes |
| 503-777 | Lumen QWEST CORPORATION | – | no | yes |
| 503-778 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-780 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-781 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-784 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-788 | Lumen QWEST CORPORATION | – | no | yes |
| 503-789 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-790 | Lumen QWEST CORPORATION | – | no | yes |
| 503-793 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-795 | Lumen QWEST CORPORATION | – | no | yes |
| 503-796 | Lumen QWEST CORPORATION | – | no | yes |
| 503-797 | Lumen QWEST CORPORATION | – | no | yes |
| 503-799 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-802 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | no | yes |
| 503-803 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-804 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-805 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-806 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-807 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-808 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 503-810 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-813 | Lumen QWEST CORPORATION | – | no | yes |
| 503-816 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-817 | Spok SPOK, INC. | – | no | yes |
| 503-818 | Spok SPOK, INC. | – | no | yes |
| 503-819 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-820 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 503-821 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 503-823 | Lumen QWEST CORPORATION | – | no | yes |
| 503-827 | Lumen QWEST CORPORATION | – | no | yes |
| 503-830 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-833 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-839 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2006-07-28 | yes | yes |
| 503-841 | T-Mobile T-MOBILE USA, INC. | 2005-10-21 | yes | yes |
| 503-847 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2008-11-19 | yes | yes |
| 503-849 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-853 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2006-02-24 | yes | yes |
| 503-860 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-863 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2006-10-17 | yes | yes |
| 503-865 | Lumen QWEST CORPORATION | – | no | yes |
| 503-866 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 503-867 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2006-08-17 | yes | yes |
| 503-869 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-870 | Spok SPOK, INC. | – | no | yes |
| 503-872 | Lumen QWEST CORPORATION | – | no | yes |
| 503-875 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2006-07-20 | yes | yes |
| 503-880 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-886 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-887 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-888 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-889 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - OR | – | yes | yes |
| 503-890 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-891 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-892 | Lumen QWEST CORPORATION | – | no | yes |
| 503-893 | IP HORIZON LLC | 2009-07-10 | yes | yes |
| 503-894 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2009-08-28 | yes | yes |
| 503-896 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2007-09-20 | yes | yes |
| 503-901 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-903 | Spok SPOK, INC. | – | no | yes |
| 503-904 | Spok SPOK, INC. | – | no | yes |
| 503-909 | Lumen QWEST CORPORATION | – | no | yes |
| 503-913 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-914 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-915 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2008-12-18 | yes | yes |
| 503-916 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-920 | Spok SPOK, INC. | – | no | yes |
| 503-921 | Spok SPOK, INC. | – | no | yes |
| 503-922 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2005-05-18 | yes | yes |
| 503-926 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2008-09-10 | yes | yes |
| 503-927 | T-Mobile T-MOBILE USA, INC. | 2006-01-12 | yes | yes |
| 503-928 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2006-08-08 | yes | yes |
| 503-929 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2005-11-03 | yes | yes |
| 503-933 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2006-07-28 | yes | yes |
| 503-935 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2007-03-12 | yes | yes |
| 503-936 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-937 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 503-938 | Spok SPOK, INC. | – | no | yes |
| 503-939 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | – | no | yes |
| 503-940 | Spok SPOK, INC. | – | no | yes |
| 503-942 | Spok SPOK, INC. | – | no | yes |
| 503-943 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 503-944 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-946 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - OR | – | yes | yes |
| 503-948 | Lumen QWEST CORPORATION | – | no | yes |
| 503-952 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-953 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2007-08-08 | yes | yes |
| 503-954 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2007-03-12 | yes | yes |
| 503-955 | Spok SPOK, INC. | – | no | yes |
| 503-956 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2005-06-14 | yes | yes |
| 503-957 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-960 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2007-02-26 | yes | yes |
| 503-961 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | yes | yes |
| 503-962 | Lumen QWEST CORPORATION | – | yes | yes |
| 503-963 | Lumen QWEST CORPORATION | – | no | yes |
| 503-964 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 2009-07-10 | yes | yes |
| 503-969 | T-Mobile METROPCS, INC. | – | yes | yes |
| 503-970 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 503-972 | Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | – | no | yes |
| 503-973 | Lumen QWEST CORPORATION | – | no | yes |
| 503-975 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 503-977 | Lumen QWEST CORPORATION | – | no | yes |
| 503-978 | Lumen QWEST CORPORATION | – | no | yes |
| 503-988 | Lumen QWEST CORPORATION | – | no | yes |
| 503-993 | Spok SPOK, INC. | – | no | yes |
| 503-995 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2007-02-08 | yes | yes |
| 503-997 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
| 503-998 | T-Mobile T-MOBILE USA, INC. | – | no | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| QWEST CORPORATION | Lumen | 145 | 41.8% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 55 | 15.9% |
| T-MOBILE USA, INC. | T-Mobile | 40 | 11.5% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | Verizon | 38 | 11% |
| SPOK, INC. | Spok | 22 | 6.3% |
| ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | Allstream | 16 | 4.6% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 10 | 2.9% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - OR | AT&T | 8 | 2.3% |
| LEVEL 3 TELECOM OF OREGON, LLC - OR | Lumen | 4 | 1.2% |
| ONVOY, LLC - OR | Onvoy | 2 | 0.6% |
| LEVEL 3 COMMUNICATIONS, LLC - OR | Lumen | 2 | 0.6% |
| NORTH COUNTY COMMUNICATION CORPORATION - OR | – | 1 | 0.3% |
| ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | Ziply Fiber | 1 | 0.3% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 0.3% |
| IP HORIZON LLC | – | 1 | 0.3% |
| METROPCS, INC. | T-Mobile | 1 | 0.3% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to PORTLAND in area code 503?
347 blocks: 200, 201, 202, 203, 204, 205, 206, 208, 209, 215, 216, 219 and 335 more, all listed in the table above.
Which carriers have numbers in PORTLAND?
QWEST CORPORATION (145 blocks), NEW CINGULAR WIRELESS PCS, LLC (55 blocks), T-MOBILE USA, INC. (40 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR (38 blocks), SPOK, INC. (22 blocks), ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (16 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is PORTLAND a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.