All assignees
800 prefixes in 773 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 773-200 | CHICGOZN02 | 598J | 2023-05-18 | Yes |
| 773-201 | CHICGOZN01 | 6630 | — | — |
| 773-202 | CHICGOZN03 | 9329 | — | Yes |
| 773-203 | CHICGOZN01 | 6534 | — | — |
| 773-204 | CHICGOZN07 | 7136 | 2025-04-30 | Yes |
| 773-205 | CHICGOZN03 | 9329 | — | Yes |
| 773-206 | CHICGOZN01 | 6534 | — | — |
| 773-207 | CHICGOZN10 | 224C | 2019-08-07 | Yes |
| 773-208 | CHICGOZN01 | 6534 | — | — |
| 773-209 | CHICGOZN03 | 6529 | — | Yes |
| 773-210 | CHICGOZN01 | 9329 | — | — |
| 773-211 | XXXXXXXXXX | MULT | — | — |
| 773-212 | CHICGOZN03 | 6630 | — | — |
| 773-213 | CHICGOZN01 | 6534 | — | — |
| 773-214 | CHICGOZN01 | 6630 | — | — |
| 773-215 | CHICGOZN01 | 6630 | — | — |
| 773-216 | CHICGOZN01 | 6529 | — | Yes |
| 773-217 | CHICGOZN09 | 6534 | 2009-05-19 | Yes |
| 773-218 | CHICGOZN01 | 6534 | — | — |
| 773-219 | CHICGOZN07 | 6529 | — | Yes |
| 773-220 | CHICGOZN03 | 6529 | — | Yes |
| 773-221 | CHICGOZN09 | 9329 | — | — |
| 773-222 | CHICGOZN01 | 6630 | — | — |
| 773-223 | CHICGOZN06 | 6630 | — | — |
| 773-224 | CHICGOZN07 | 9329 | — | — |
| 773-225 | CHICGOZN03 | 6529 | 2006-03-15 | Yes |
| 773-226 | CHICGOZN10 | 6529 | 2007-11-27 | Yes |
| 773-227 | CHICGOZN04 | 9329 | — | — |
| 773-228 | CHICGOZN01 | 6630 | — | — |
| 773-229 | CHICGOZN08 | 9329 | — | — |
| 773-230 | CHICGOZN03 | 6534 | — | — |
| 773-231 | CHICGOZN07 | 6115 | 2011-09-08 | Yes |
| 773-232 | CHICGOZN10 | 224C | 2020-02-05 | Yes |
| 773-233 | CHICGOZN10 | 9329 | — | — |
| 773-234 | CHICGOZN06 | 984E | 2009-06-26 | Yes |
| 773-235 | CHICGOZN04 | 9329 | — | — |
| 773-236 | CHICGOZN07 | 6529 | 2009-06-26 | Yes |
| 773-237 | CHICGOZN05 | 9329 | — | — |
| 773-238 | CHICGOZN10 | 9329 | — | — |
| 773-239 | CHICGOZN10 | 9329 | — | — |
| 773-240 | CHICGOZN10 | 6529 | 2007-10-16 | Yes |
| 773-241 | CHICGOZN07 | 9329 | — | Yes |
| 773-242 | CHICGOZN06 | 9329 | — | Yes |
| 773-243 | CHICGOZN03 | 7229 | — | Yes |
| 773-244 | CHICGOZN04 | 9329 | — | — |
| 773-245 | CHICGOZN08 | 984E | 2010-06-16 | Yes |
| 773-246 | CHICGOZN04 | 6795 | — | — |
| 773-247 | CHICGOZN06 | 9329 | — | — |
| 773-248 | CHICGOZN04 | 9329 | — | — |
| 773-249 | CHICGOZN11 | 6115 | — | Yes |
| 773-250 | CHICGOZN02 | 7229 | — | Yes |
| 773-251 | CHICGOZN03 | 6534 | — | — |
| 773-252 | CHICGOZN04 | 9329 | — | — |
| 773-253 | CHICGOZN10 | 7136 | — | Yes |
| 773-254 | CHICGOZN06 | 9329 | — | — |
| 773-255 | CHICGOZN03 | 6534 | — | — |
| 773-256 | CHICGOZN07 | 9329 | — | Yes |
| 773-257 | CHICGOZN06 | 9329 | — | Yes |
| 773-258 | CHICGOZN01 | 6630 | — | — |
| 773-259 | CHICGOZN01 | 6534 | — | — |
| 773-260 | CHICGOZN10 | 9329 | — | Yes |
| 773-261 | CHICGOZN05 | 9329 | — | Yes |
| 773-262 | CHICGOZN02 | 9329 | — | — |
| 773-263 | CHICGOZN03 | 6529 | — | Yes |
| 773-264 | CHICGOZN10 | 9329 | — | — |
| 773-265 | CHICGOZN06 | 9329 | — | — |
| 773-266 | CHICGOZN01 | 6534 | — | — |
| 773-267 | CHICGOZN02 | 9329 | — | — |
| 773-268 | CHICGOZN07 | 9329 | — | — |
| 773-269 | CHICGOZN04 | 7136 | — | Yes |
| 773-270 | CHICGOZN04 | 5562 | 2009-06-04 | Yes |
| 773-271 | CHICGOZN02 | 9329 | — | — |
| 773-272 | CHICGOZN03 | 7229 | — | Yes |
| 773-273 | CHICGOZN02 | 9329 | — | Yes |
| 773-274 | CHICGOZN02 | 9329 | — | — |
| 773-275 | CHICGOZN02 | 9329 | — | — |
| 773-276 | CHICGOZN04 | 9329 | — | — |
| 773-277 | CHICGOZN06 | 9329 | — | Yes |
| 773-278 | CHICGOZN04 | 9329 | — | — |
| 773-279 | CHICGOZN02 | 9329 | — | Yes |
| 773-280 | CHICGOZN06 | 6529 | — | Yes |
| 773-281 | CHICGOZN04 | 9329 | — | — |
| 773-282 | CHICGOZN03 | 9329 | — | — |
| 773-283 | CHICGOZN03 | 9329 | — | — |
| 773-284 | CHICGOZN08 | 9329 | — | — |
| 773-285 | CHICGOZN07 | 9329 | — | Yes |
| 773-286 | CHICGOZN03 | 9329 | — | — |
| 773-287 | CHICGOZN05 | 9329 | — | — |
| 773-288 | CHICGOZN07 | 9329 | — | Yes |
| 773-289 | CHICGOZN04 | 7229 | — | Yes |
| 773-290 | CHICGOZN02 | 6115 | — | Yes |
| 773-291 | CHICGOZN10 | 9329 | — | — |
| 773-292 | CHICGOZN04 | 9329 | — | — |
| 773-293 | CHICGOZN02 | 9329 | — | Yes |
| 773-294 | CHICGOZN03 | 6534 | — | — |
| 773-295 | CHICGOZN05 | 7229 | — | Yes |
| 773-296 | CHICGOZN04 | 9329 | — | — |
| 773-297 | CHICGOZN03 | 6529 | — | Yes |
| 773-298 | CHICGOZN10 | 9329 | — | — |
| 773-299 | CHICGOZN06 | 7229 | — | Yes |
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.