All assignees
466 prefixes in 667 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 667-200 | COLUMBIA | 876D | 2015-12-18 | Yes |
| 667-201 | BEL AIR | 6395 | 2015-11-17 | Yes |
| 667-202 | ELKTON | 876D | 2016-02-17 | Yes |
| 667-203 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-204 | ANNAPOLIS | 829J | 2016-12-29 | Yes |
| 667-205 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-206 | TOWSON | 5562 | 2013-07-16 | Yes |
| 667-207 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-208 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-209 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-210 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-211 | XXXXXXXXXX | MULT | — | — |
| 667-212 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-213 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-214 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-215 | ELKTON | 318J | 2016-09-27 | Yes |
| 667-216 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-217 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-218 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-219 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-220 | GREENSBORO | 876D | 2017-03-24 | Yes |
| 667-221 | SALISBURY | 073H | 2017-06-14 | Yes |
| 667-222 | ARGRGBSNIS | 876D | 2015-08-17 | Yes |
| 667-223 | BALTIMORE | 197D | 2017-08-04 | Yes |
| 667-224 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-225 | ANNAPOLIS | 4036 | 2014-07-15 | Yes |
| 667-226 | STMICHAELS | 876D | 2017-03-27 | Yes |
| 667-227 | SALISBURY | 361H | 2017-09-15 | Yes |
| 667-228 | ABERDEEN | 6855 | 2015-01-21 | Yes |
| 667-229 | ABERDEEN | 6855 | 2016-02-18 | Yes |
| 667-230 | CENTREVL | 568G | 2018-02-13 | Yes |
| 667-231 | ABERDEEN | 6855 | — | Yes |
| 667-232 | GLENBURNIE | 7325 | 2018-04-04 | Yes |
| 667-233 | BALTIMORE | 9212 | 2015-02-13 | Yes |
| 667-234 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-235 | SALISBURY | 197D | 2018-06-01 | Yes |
| 667-236 | PERRYVILLE | 2593 | 2018-06-11 | Yes |
| 667-237 | WEST RIVER | 2593 | 2018-06-11 | Yes |
| 667-238 | PRESTON | 2593 | 2018-06-12 | Yes |
| 667-239 | BALTIMORE | 6395 | 2012-02-08 | Yes |
| 667-240 | COLUMBIA | 964H | 2016-11-22 | Yes |
| 667-241 | RIDGELY | 2593 | 2018-06-12 | Yes |
| 667-242 | ROCK HALL | 2593 | 2018-06-12 | Yes |
| 667-243 | OXFORD | 2593 | 2018-06-04 | Yes |
| 667-244 | STILL POND | 2593 | 2018-06-12 | Yes |
| 667-245 | CECILTON | 2593 | 2018-06-12 | Yes |
| 667-246 | CENTREVL | 2593 | 2018-06-12 | Yes |
| 667-247 | CHESAPKECY | 2593 | 2018-06-12 | Yes |
| 667-248 | DENTON | 2593 | 2018-06-12 | Yes |
| 667-249 | GALENA | 2593 | 2018-06-12 | Yes |
| 667-250 | BALTIMORE | 624H | 2018-06-19 | Yes |
| 667-251 | TOWSON | 6119 | 2014-12-24 | Yes |
| 667-252 | SALISBURY | 624H | 2018-06-19 | Yes |
| 667-253 | SALISBURY | 551G | 2013-03-11 | Yes |
| 667-254 | CHESTERTN | 2593 | — | Yes |
| 667-255 | HILLSBORO | 876D | 2018-08-22 | Yes |
| 667-256 | ABERDEEN | 114J | 2018-09-27 | Yes |
| 667-257 | COLUMBIA | 197D | 2018-11-14 | Yes |
| 667-258 | BALTIMORE | 996H | 2018-11-14 | Yes |
| 667-259 | REISTERSTN | 7228 | 2018-12-21 | Yes |
| 667-260 | BALTIMORE | 876D | — | Yes |
| 667-261 | COLUMBIA | 4036 | 2019-12-24 | Yes |
| 667-262 | BALTIMORE | 624H | — | Yes |
| 667-263 | DUNDALK | 4036 | 2020-03-09 | Yes |
| 667-264 | DELMAR | 7228 | 2019-02-20 | Yes |
| 667-265 | VIENNA | 7229 | 2019-03-22 | Yes |
| 667-266 | SALISBURY | 939H | 2017-06-20 | Yes |
| 667-267 | ANNAPOLIS | 2593 | 2018-10-22 | Yes |
| 667-268 | DARLINGTON | 071F | 2019-06-19 | Yes |
| 667-269 | ELKTON | 2593 | 2018-10-15 | Yes |
| 667-270 | ANNAPOLIS | 6395 | 2019-08-16 | Yes |
| 667-271 | SALISBURY | 114J | 2019-09-03 | Yes |
| 667-272 | WESTMINSTR | 4036 | 2019-09-18 | Yes |
| 667-273 | PIKESVILLE | 425J | 2019-10-09 | Yes |
| 667-274 | ELKRIDGE | 4036 | 2019-10-11 | Yes |
| 667-275 | TOWSON | 6395 | 2019-11-01 | Yes |
| 667-276 | BEL AIR | 7228 | 2020-01-27 | Yes |
| 667-277 | SHERWD FOR | 2593 | 2018-05-31 | Yes |
| 667-278 | TOWSON | 4036 | 2020-03-09 | Yes |
| 667-279 | BISHOPVL | 876D | 2020-03-12 | Yes |
| 667-280 | ELLICOTTCY | 197D | 2020-05-05 | Yes |
| 667-281 | SALISBURY | 568G | 2016-05-25 | Yes |
| 667-282 | TILGHMAN | 876D | 2020-05-28 | Yes |
| 667-283 | FORK | 7421 | 2020-07-06 | Yes |
| 667-284 | BALTIMORE | 6119 | 2020-07-30 | Yes |
| 667-285 | HURLOCK | 876D | 2017-03-24 | Yes |
| 667-286 | SALISBURY | 321J | 2020-08-12 | Yes |
| 667-287 | BISHOPVL | 478J | 2020-09-01 | Yes |
| 667-288 | BERLIN | 6119 | 2020-09-01 | Yes |
| 667-289 | ABERDEEN | 6855 | 2020-09-01 | Yes |
| 667-290 | BALTIMORE | 515J | 2020-09-09 | Yes |
| 667-291 | MILLINGTON | 876D | 2017-03-27 | Yes |
| 667-292 | SALISBURY | 515J | 2020-09-09 | Yes |
| 667-293 | SHARPTOWN | 876D | 2020-09-21 | Yes |
| 667-294 | TOWSON | 4036 | 2020-09-21 | Yes |
| 667-295 | CROFTON | 2593 | 2018-10-15 | Yes |
| 667-296 | REISTERSTN | 7228 | 2020-09-22 | Yes |
| 667-297 | EDGEWOOD | 5562 | 2020-12-09 | Yes |
| 667-298 | ABERDEEN | 6855 | 2021-01-18 | Yes |
| 667-299 | ANNAPOLIS | 321J | 2020-04-10 | 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.