All assignees
800 prefixes in 240 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 240-300 | WALDORF | 6395 | 2010-12-07 | Yes |
| 240-301 | CLEAR SPG | 876D | 2020-06-09 | Yes |
| 240-302 | LAUREL236 | 4036 | 2016-09-28 | Yes |
| 240-303 | WSNGTNZN16 | 829J | — | Yes |
| 240-304 | WSHNGTNZN5 | 6855 | 2002-07-03 | Yes |
| 240-305 | WSHNGTNZN3 | 6855 | — | Yes |
| 240-306 | GAITHERSBG | 7229 | — | Yes |
| 240-307 | EMMITSBURG | 071F | 2003-03-27 | Yes |
| 240-308 | DAMASCS236 | 4036 | — | Yes |
| 240-309 | LEONARDTN | 6395 | 2012-09-10 | Yes |
| 240-310 | HAGERSTOWN | 4720 | — | Yes |
| 240-311 | XXXXXXXXXX | MULT | — | — |
| 240-312 | WSHNGTNZN5 | 829J | — | Yes |
| 240-313 | HAGERSTOWN | 9212 | — | Yes |
| 240-314 | WSNGTNZN10 | 9212 | — | Yes |
| 240-315 | FREDERICK | 9212 | — | Yes |
| 240-316 | WSHNGTNZN2 | 6855 | — | Yes |
| 240-317 | LXTNPKGRML | 8832 | — | Yes |
| 240-318 | WSNGTNZN16 | 9212 | — | Yes |
| 240-319 | LAUREL238 | 6395 | 2008-06-06 | Yes |
| 240-320 | WALDORF | 829J | — | Yes |
| 240-321 | OAKLAND | 4720 | — | Yes |
| 240-322 | MCCOOLE | 2593 | — | — |
| 240-323 | EMMITSBURG | 2593 | — | — |
| 240-324 | ASHTON238 | 281E | 2008-10-08 | Yes |
| 240-325 | DAMASCS236 | 2593 | — | — |
| 240-326 | WSNG236Z15 | 829J | — | Yes |
| 240-327 | GAITHERSBG | 2593 | — | — |
| 240-328 | WSNGTNZN10 | 9212 | — | Yes |
| 240-329 | HAGERSTOWN | 6119 | — | Yes |
| 240-330 | WSHNGTNZN2 | 6855 | 2007-12-14 | Yes |
| 240-331 | WSHNGTNZN3 | 568G | — | Yes |
| 240-332 | TOMPKINSVL | 568G | — | Yes |
| 240-333 | WSHNGTNZN2 | 829J | 2001-05-09 | — |
| 240-334 | WSNG236Z14 | 6119 | — | Yes |
| 240-335 | WSNG236Z14 | 829J | — | Yes |
| 240-336 | WSHNGTNZN2 | 2593 | — | — |
| 240-337 | WSHNGTNZN5 | 876D | — | Yes |
| 240-338 | WSHNGTNZN3 | 6395 | — | Yes |
| 240-339 | WSNG236Z15 | 829J | — | Yes |
| 240-340 | WSHNGTNZN2 | 6855 | 2011-08-18 | Yes |
| 240-341 | BUCKEYSTN | 7228 | 2009-02-25 | Yes |
| 240-342 | ASHTON236 | 8832 | — | Yes |
| 240-343 | HANCOCK | 6395 | 2011-05-10 | Yes |
| 240-344 | FREDERICK | 4036 | 2002-10-15 | Yes |
| 240-345 | ASHTON238 | 6119 | 2006-03-09 | Yes |
| 240-346 | WALDORF | 5562 | — | Yes |
| 240-347 | HAGERSTOWN | 071F | 2008-08-04 | Yes |
| 240-348 | WSNGTNZN16 | 6119 | — | Yes |
| 240-349 | LA PLATA | 876D | — | Yes |
| 240-350 | WSHNGTNZN3 | 6855 | — | Yes |
| 240-351 | WSHNGTNZN3 | 6855 | — | Yes |
| 240-352 | LA PLATA | 568G | — | Yes |
| 240-353 | WSHNGTNZN3 | 6855 | — | Yes |
| 240-354 | WSHNGTNZN3 | 6855 | — | Yes |
| 240-355 | WSHNGTNZN3 | 6855 | — | Yes |
| 240-356 | MYERSVILLE | 6119 | — | Yes |
| 240-357 | FREDERICK | 6395 | 2006-06-12 | Yes |
| 240-358 | DAMASCS236 | 568G | — | Yes |
| 240-359 | INDIANHEAD | 568G | — | Yes |
| 240-360 | LAUREL236 | 6855 | 2013-09-17 | Yes |
| 240-361 | GAITHERSBG | 829J | — | Yes |
| 240-362 | CUMBERLAND | 9212 | — | Yes |
| 240-363 | WSNGTNZN11 | 876D | — | — |
| 240-364 | GAITHERSBG | 829J | 2001-05-09 | Yes |
| 240-365 | DAMASCS236 | 8697 | — | — |
| 240-366 | WILLIAMSPT | 071F | — | Yes |
| 240-367 | FREDERICK | 6855 | 2002-10-18 | Yes |
| 240-368 | WALDORF | 568G | — | Yes |
| 240-369 | MOUNT AIRY | 2593 | — | — |
| 240-370 | WSHNGTNZN2 | 6855 | 2007-12-14 | Yes |
| 240-371 | WSNGTNZN12 | 568G | — | Yes |
| 240-372 | GAITHERSBG | 5562 | — | Yes |
| 240-373 | WSNG236Z13 | 9212 | — | — |
| 240-374 | LAUREL236 | 6119 | — | Yes |
| 240-375 | WSHNGTNZN5 | 6855 | — | Yes |
| 240-376 | HUGHESVL | 568G | — | Yes |
| 240-377 | INDIANHEAD | 6119 | — | Yes |
| 240-378 | CUMBERLAND | 2593 | — | — |
| 240-379 | FREDERICK | 9212 | — | — |
| 240-380 | WSHNGTNZN2 | 6395 | 2007-09-17 | Yes |
| 240-381 | WSHNGTNZN3 | 4036 | — | — |
| 240-382 | HAGERSTOWN | 7325 | 2009-06-11 | Yes |
| 240-383 | WSHNGTNZN2 | 4036 | — | Yes |
| 240-384 | LXTNPKGRML | 568G | — | Yes |
| 240-385 | MYERSVILLE | 9212 | — | Yes |
| 240-386 | WSNGTNZN10 | 9212 | — | Yes |
| 240-387 | WSNG236Z13 | 829J | — | Yes |
| 240-388 | GAITHERSBG | 5562 | 2002-11-04 | Yes |
| 240-389 | ASHTON236 | 829J | — | Yes |
| 240-390 | ASHTON236 | 829J | — | Yes |
| 240-391 | WSNG236Z13 | 876D | — | Yes |
| 240-392 | WSHNGTNZN5 | 8832 | — | Yes |
| 240-393 | WSHNGTNZN3 | 6395 | — | Yes |
| 240-394 | MOUNT AIRY | 4036 | 2004-12-13 | Yes |
| 240-395 | WSHNGTNZN2 | 829J | — | Yes |
| 240-396 | WSHNGTNZN2 | 6119 | — | Yes |
| 240-397 | FREDERICK | 6395 | 2009-03-06 | Yes |
| 240-398 | WSHNGTNZN3 | 6855 | 2002-07-03 | Yes |
| 240-399 | WSNGTNZN10 | 7229 | — | — |
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.