All assignees
800 prefixes in 503 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 503-200 | PORTLAND | 6010 | 2006-10-17 | Yes |
| 503-201 | PORTLAND | 5820 | — | — |
| 503-202 | PORTLAND | 6630 | — | — |
| 503-203 | PORTLAND | 9638 | — | — |
| 503-204 | PORTLAND | 6630 | — | — |
| 503-205 | PORTLAND | 7229 | — | — |
| 503-206 | PORTLAND | 750E | 2006-03-13 | Yes |
| 503-207 | BEAVERTON | 7229 | — | Yes |
| 503-208 | PORTLAND | 6010 | 2008-10-27 | Yes |
| 503-209 | PORTLAND | 6529 | — | Yes |
| 503-210 | CLACKAMAS | 7172 | — | Yes |
| 503-211 | XXXXXXXXXX | MULT | — | — |
| 503-212 | CLACKAMAS | 7172 | — | Yes |
| 503-213 | BEAVERTON | 7172 | — | Yes |
| 503-214 | BEAVERTON | 7172 | — | Yes |
| 503-215 | PORTLAND | 9638 | — | — |
| 503-216 | PORTLAND | 9638 | — | — |
| 503-217 | SHERWOOD | 7172 | — | Yes |
| 503-218 | STFRD-SNDY | 7172 | — | Yes |
| 503-219 | PORTLAND | 9638 | — | — |
| 503-220 | PORTLAND | 9638 | — | — |
| 503-221 | PORTLAND | 9638 | — | — |
| 503-222 | PORTLAND | 9638 | — | — |
| 503-223 | PORTLAND | 9638 | — | — |
| 503-224 | PORTLAND | 9638 | — | — |
| 503-225 | PORTLAND | 9638 | — | — |
| 503-226 | PORTLAND | 9638 | — | — |
| 503-227 | PORTLAND | 9638 | — | — |
| 503-228 | PORTLAND | 9638 | — | — |
| 503-229 | PORTLAND | 9638 | — | — |
| 503-230 | PORTLAND | 9638 | — | — |
| 503-231 | PORTLAND | 9638 | — | — |
| 503-232 | PORTLAND | 9638 | — | — |
| 503-233 | PORTLAND | 9638 | — | — |
| 503-234 | PORTLAND | 9638 | — | — |
| 503-235 | PORTLAND | 9638 | — | — |
| 503-236 | PORTLAND | 9638 | — | — |
| 503-237 | PORTLAND | 6630 | — | — |
| 503-238 | PORTLAND | 9638 | — | — |
| 503-239 | PORTLAND | 9638 | — | — |
| 503-240 | PORTLAND | 9638 | — | — |
| 503-241 | PORTLAND | 9638 | — | — |
| 503-242 | PORTLAND | 9638 | — | — |
| 503-243 | PORTLAND | 9638 | — | — |
| 503-244 | PORTLAND | 9638 | — | — |
| 503-245 | PORTLAND | 9638 | — | — |
| 503-246 | PORTLAND | 9638 | — | — |
| 503-247 | PORTLAND | 9638 | — | — |
| 503-248 | PORTLAND | 9638 | — | — |
| 503-249 | PORTLAND | 9638 | — | — |
| 503-250 | PORTLAND | 9638 | — | Yes |
| 503-251 | PORTLAND | 9638 | — | — |
| 503-252 | PORTLAND | 9638 | — | — |
| 503-253 | PORTLAND | 9638 | — | — |
| 503-254 | PORTLAND | 9638 | — | — |
| 503-255 | PORTLAND | 9638 | — | — |
| 503-256 | PORTLAND | 9638 | — | — |
| 503-257 | PORTLAND | 9638 | — | — |
| 503-258 | PORTLAND | 9638 | — | Yes |
| 503-259 | BEAVERTON | 4323 | — | — |
| 503-260 | PORTLAND | 5820 | — | — |
| 503-261 | PORTLAND | 9638 | — | Yes |
| 503-262 | PORTLAND | 9638 | — | — |
| 503-263 | CANBYNEEDY | 2362 | — | — |
| 503-264 | BEAVERTON | 7229 | — | — |
| 503-265 | PORTLAND | 7531 | — | Yes |
| 503-266 | CANBYNEEDY | 2362 | — | — |
| 503-267 | PORTLAND | 6529 | — | — |
| 503-268 | BEAVERTON | 7531 | — | Yes |
| 503-269 | SALEM | 6529 | — | Yes |
| 503-270 | BEAVERTON | 7531 | — | Yes |
| 503-271 | PORTLAND | 6630 | — | — |
| 503-272 | GOVENTCAMP | 2360 | — | Yes |
| 503-273 | PORTLAND | 9638 | — | — |
| 503-274 | PORTLAND | 9638 | — | — |
| 503-275 | PORTLAND | 9638 | — | — |
| 503-276 | PORTLAND | 9638 | — | — |
| 503-277 | BEAVERTON | 4323 | — | Yes |
| 503-278 | PORTLAND | 5820 | 2008-08-05 | Yes |
| 503-279 | PORTLAND | 9638 | — | — |
| 503-280 | PORTLAND | 9638 | — | — |
| 503-281 | PORTLAND | 9638 | — | — |
| 503-282 | PORTLAND | 9638 | — | — |
| 503-283 | PORTLAND | 9638 | — | — |
| 503-284 | PORTLAND | 9638 | — | — |
| 503-285 | PORTLAND | 9638 | — | — |
| 503-286 | PORTLAND | 9638 | — | — |
| 503-287 | PORTLAND | 9638 | — | — |
| 503-288 | PORTLAND | 9638 | — | — |
| 503-289 | PORTLAND | 9638 | — | — |
| 503-290 | PORTLAND | 7229 | — | Yes |
| 503-291 | PORTLAND | 9638 | — | — |
| 503-292 | PORTLAND | 9638 | — | — |
| 503-293 | PORTLAND | 9638 | — | — |
| 503-294 | PORTLAND | 9638 | — | — |
| 503-295 | PORTLAND | 9638 | — | — |
| 503-296 | PORTLAND | 9638 | — | — |
| 503-297 | PORTLAND | 9638 | — | — |
| 503-298 | ASTORIA | 3234 | 2002-07-25 | Yes |
| 503-299 | PORTLAND | 9638 | — | — |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.