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
301-200 INDIANHEAD 071F 2011-02-24 Yes
301-201 WSNGTNZN10 4036 2022-11-07 Yes
301-202 WSHNGTNZN2 4036 2008-12-19 Yes
301-203 WSHNGTNZN6 9212 — —
301-204 WSHNGTNZN2 4036 — Yes
301-205 WSNG238Z14 9212 — Yes
301-206 WSNG236Z13 9212 — —
301-207 WSNG236Z13 6630 — —
301-208 GAITHERSBG 9212 — —
301-209 WSHNGTNZN4 9212 — —
301-210 LAUREL236 9212 — —
301-211 XXXXXXXXXX MULT — —
301-212 WSNGTNZN10 9212 — Yes
301-213 WSHNGTNZN3 6855 — Yes
301-214 WSHNGTNZN2 9212 — —
301-215 WSHNGTNZN2 9212 — Yes
301-216 GAITHERSBG 9212 — —
301-217 WSNGTNZN10 9212 — —
301-218 WSNG236Z14 9212 — —
301-219 WSHNGTNZN2 4036 — —
301-220 WSNG236Z13 9212 — Yes
301-221 WSHNGTNZN2 4036 — —
301-222 WSHNGTNZN2 829J — Yes
301-223 WILLIAMSPT 9212 — Yes
301-224 WSHNGTNZN2 6630 — —
301-225 WSNG236Z14 7529 2009-05-21 Yes
301-226 WSHNGTNZN4 9212 — —
301-227 WSHNGTNZN2 9212 — —
301-228 FREDERICK 9212 — Yes
301-229 WSHNGTNZN2 9212 — —
301-230 WSNGTNZN11 9212 — —
301-231 WSNGTNZN11 9212 — Yes
301-232 ASHTON236 7229 — Yes
301-233 WSHNGTNZN3 6395 — —
301-234 WSNGTNZN16 9212 — Yes
301-235 WSNGTNZN16 7229 — Yes
301-236 WSNGTNZN12 9212 — —
301-237 WSHNGTNZN3 6855 — Yes
301-238 WSNGTNZN16 9212 — Yes
301-239 WSHNGTNZN4 9212 — —
301-240 WSNGTNZN10 9212 — Yes
301-241 HIGHFIELD 9212 — Yes
301-242 BRANDYWINE 7229 — Yes
301-243 WSHNGTNZN2 9212 2006-07-20 Yes
301-244 WSHNGTNZN3 829J — Yes
301-245 BITTINGER 9212 — Yes
301-246 NANJEMOY 9212 — Yes
301-247 LEONARDTN 4036 — —
301-248 WSHNGTNZN6 9212 — —
301-249 WSNG236Z14 9212 — —
301-250 GAITHERSBG 7229 — Yes
301-251 WSNGTNZN10 9212 — —
301-252 GAITHERSBG 5562 — Yes
301-253 DAMASCS236 9212 — —
301-254 WSHNGTNZN3 6855 — Yes
301-255 WSNGTNZN11 9212 — Yes
301-256 LAUREL236 7229 — Yes
301-257 WSHNGTNZN3 6855 — Yes
301-258 WSNGTNZN10 9212 — —
301-259 TOMPKINSVL 9212 — Yes
301-260 ASHTON236 9212 — Yes
301-261 WSNG238Z14 9212 — —
301-262 WSNG236Z14 9212 — —
301-263 WSHNGTNZN2 9212 — Yes
301-264 MT SAVAGE 9212 — Yes
301-265 WSHNGTNZN6 9212 — Yes
301-266 WALDORF 4036 — —
301-267 WSHNGTNZN3 6855 2011-10-04 Yes
301-268 CUMBERLAND 4720 — Yes
301-269 WSHNGTNZN2 7229 2014-11-11 Yes
301-270 WSHNGTNZN3 9212 — —
301-271 THURMONT 9212 — Yes
301-272 WSHNGTNZN2 7229 — Yes
301-273 WSHNGTNZN3 7229 — Yes
301-274 HUGHESVL 9212 — Yes
301-275 WSHNGTNZN2 4036 — Yes
301-276 WSHNGTNZN4 7229 — Yes
301-277 WSHNGTNZN4 9212 — —
301-278 WSHNGTNZN5 7229 — Yes
301-279 WSNGTNZN10 9212 — —
301-280 WSHNGTNZN2 9212 — —
301-281 WSHNGTNZN6 7229 — Yes
301-282 WSNGTNZN12 9212 — —
301-283 WSHNGTNZN6 9212 — Yes
301-284 WSNGTNZN10 7229 — Yes
301-285 WSHNGTNZN3 9212 — —
301-286 WSNG236Z13 9212 — —
301-287 WSNGTNZN11 7229 — Yes
301-288 WSNGTNZN12 7229 — Yes
301-289 WSNG236Z13 7229 — Yes
301-290 MECHANCSVL 9212 — Yes
301-291 WSNG236Z14 7229 — Yes
301-292 WSHNGTNZN6 9212 — —
301-293 MYERSVILLE 9212 — —
301-294 WSNGTNZN10 9212 — —
301-295 WSHNGTNZN2 9212 — —
301-296 WSNGTNZN10 7229 — Yes
301-297 WSNGTNZN16 9212 — Yes
301-298 WSNG236Z15 7229 — Yes
301-299 WSNGTNZN10 9212 — —

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.