NRNumberResearch Membership · Data 09/17/2026

← Area code 301

All assignees

800 prefixes in 301 · initial assignments from the NANPA CO code file, 09/17/2026

Prefixes held by all assignees in area code 301
NPA-NXXRate centerOCNAssignedPooled
301-300 WSHNGTNZN2 6395 2007-03-30 Yes
301-301 GAITHERSBG 876D 2022-08-30 Yes
301-302 HAGERSTOWN 5562 2004-10-05 Yes
301-303 WSNG236Z13 6630 — —
301-304 WALKERSVL 318J 2007-03-06 Yes
301-305 FREDERICK 5562 — Yes
301-306 WSHNGTNZN4 9212 — —
301-307 WSNG238Z13 9212 — Yes
301-308 WSNG236Z13 6630 — —
301-309 WSNGTNZN10 9212 — Yes
301-310 LAUREL238 9212 — Yes
301-311 XXXXXXXXXX MULT — —
301-312 WSHNGTNZN2 4036 — Yes
301-313 WSNG236Z13 9212 — Yes
301-314 WSHNGTNZN4 829J — —
301-315 WSNGTNZN10 9212 — —
301-316 WSHNGTNZN5 9212 — Yes
301-317 LAUREL236 9212 — —
301-318 WSHNGTNZN2 4036 — Yes
301-319 WSHNGTNZN2 9212 — —
301-320 WSHNGTNZN2 9212 — —
301-321 WSNGTNZN11 876D — Yes
301-322 WSHNGTNZN4 9212 — —
301-323 LAUREL236 7591 — Yes
301-324 WSHNGTNZN5 9212 — —
301-325 WSHNGTNZN3 6395 — —
301-326 WSHNGTNZN3 6855 — Yes
301-327 WSNG238Z15 318J 2006-03-09 Yes
301-328 WSHNGTNZN3 318J 2006-06-21 Yes
301-329 ASHTON238 876D — Yes
301-330 GAITHERSBG 9212 — —
301-331 HAGERSTOWN 4036 — Yes
301-332 WSHNGTNZN3 4036 — —
301-333 WSHNGTNZN5 9212 — —
301-334 OAKLAND 9212 — —
301-335 WSHNGTNZN2 4036 — Yes
301-336 WSHNGTNZN5 9212 — —
301-337 GAITHERSBG 7229 — Yes
301-338 CUMBERLAND 228C 2006-01-31 Yes
301-339 WSNGTNZN10 829J — Yes
301-340 WSNGTNZN10 9212 — —
301-341 WSHNGTNZN4 9212 — —
301-342 LXTNPKGRML 9212 — —
301-343 WSHNGTNZN5 5562 — Yes
301-344 WSNG236Z13 9212 — —
301-345 WSNG236Z13 9212 — —
301-346 WSHNGTNZN3 4036 — —
301-347 WSHNGTNZN2 9212 — Yes
301-348 WSNGTNZN11 7229 — Yes
301-349 POOLESVL 9212 — Yes
301-350 WSHNGTNZN5 9212 — —
301-351 WSHNGTNZN3 6395 — —
301-352 WSNG236Z14 9212 — —
301-353 WSNGTNZN10 9212 — —
301-354 WSNGTNZN10 7529 — Yes
301-355 GAITHERSBG 9212 2005-12-08 Yes
301-356 LAUREL236 4492 — Yes
301-357 WSHNGTNZN3 6395 2006-10-12 Yes
301-358 WSNG236Z15 6119 — Yes
301-359 WESTERNPT 9212 — Yes
301-360 FREDERICK 9212 — Yes
301-361 WSHNGTNZN4 7591 — —
301-362 LAUREL236 9212 — —
301-363 DAMASCS240 6119 2006-08-16 Yes
301-364 WSHNGTNZN4 7229 — Yes
301-365 WSHNGTNZN2 9212 — —
301-366 GAITHERSBG 5562 — Yes
301-367 WSHNGTNZN3 6395 — —
301-368 DAMASCS236 9212 — Yes
301-369 WSNG236Z13 9212 — —
301-370 GAITHERSBG 5562 — Yes
301-371 MIDDLETOWN 9212 — Yes
301-372 WSNGTNZN16 9212 — Yes
301-373 LEONARDTN 9212 — Yes
301-374 WALDORF 9212 — Yes
301-375 INDIANHEAD 9212 — Yes
301-376 LAUREL236 9212 — —
301-377 LAUREL236 318J — Yes
301-378 FREDERICK 318J 2007-02-20 Yes
301-379 WSHNGTNZN3 6855 — Yes
301-380 WSHNGTNZN2 9212 — —
301-381 WSHNGTNZN2 876D 2022-07-15 Yes
301-382 WSNGTNZN11 9212 — —
301-383 WSNG236Z14 318J — Yes
301-384 WSNGTNZN12 9212 — —
301-385 WSHNGTNZN2 4036 — —
301-386 WSHNGTNZN4 9212 — —
301-387 OAKLAND 9212 — Yes
301-388 WSNGTNZN12 9212 — Yes
301-389 WSNG236Z13 7591 — Yes
301-390 WSNG236Z14 9212 — —
301-391 DAMASCS236 9212 — Yes
301-392 LA PLATA 9212 — Yes
301-393 HAGERSTOWN 9212 — Yes
301-394 WSHNGTNZN3 9212 — —
301-395 LAUREL238 6395 — Yes
301-396 WALDORF 9212 — Yes
301-397 WSNG236Z13 9212 — Yes
301-398 WSNGTNZN10 9212 2003-10-09 Yes
301-399 WALDORF 5562 — 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.