Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 301 [Rate centres in NPA 301] [Dial plan for NPA 301]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-235 5 Washington Zone 16 MD WASHDC126MD  964H BARR TELL USA, INC. 236      
301-235 6 Washington Zone 16 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-235 7 Washington Zone 16 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-235 8 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-235 9 Washington Zone 16 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-236 A Washington Zone 12 MD SLSPMDCVDS0  9212 VERIZON MARYLAND, INC. 236      
301-237 A Washington Zone 3 MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-237 0 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-237 1 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-237 2 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-237 3 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-237 4 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-237 5 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-237 6 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-237 7 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-237 8 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-237 9 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-238 A Washington Zone 16 MD TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-238 0 Washington Zone 16 MD TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-238 1 Washington Zone 16 MD TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-238 2 Washington Zone 16 MD TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-238 3 Washington Zone 16 MD TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-238 4 Washington Zone 16 MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-238 5 Washington Zone 16 MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-238 6 Washington Zone 16 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-238 7 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-238 8 Washington Zone 16 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-238 9 Washington Zone 16 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-239 A Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-240 A Washington Zone 10 MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 0 Washington Zone 10 MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 1 Washington Zone 10 MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 2 Washington Zone 10 MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 3 Washington Zone 10 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-240 4 Washington Zone 10 MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 5 Washington Zone 10 MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 6 Washington Zone 10 MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 7 Washington Zone 10 MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 8 Washington Zone 10 MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 9 Washington Zone 10 MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-241 A Highfield MD HGFLMDHFRS0  9212 VERIZON MARYLAND, INC. 240      
301-241 0 Highfield MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-241 1 Highfield MD HGFLMDHFRS0  9212 VERIZON MARYLAND, INC. 240      
301-241 2 Highfield MD FRDRMDFRXTX  318J COMCAST IP PHONE, LLC 240      
301-241 3 Highfield MD HGFLMDHFRS0  9212 VERIZON MARYLAND, INC. 240      
301-241 4 Highfield MD HGFLMDHFRS0  9212 VERIZON MARYLAND, INC. 240      
301-241 5 Highfield MD HGFLMDHFRS0  9212 VERIZON MARYLAND, INC. 240      
301-241 6 Highfield MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-241 7 Highfield MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-241 8 Highfield MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-241 9 Highfield MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-242 A Brandywine MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-242 0 Brandywine MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-242 1 Brandywine MD BTVLMD127MD  5562 METROPCS, INC. 236      
301-242 2 Brandywine MD CHCHMDBE1MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236      
301-242 3 Brandywine MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-242 4 Brandywine MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-242 5 Brandywine MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
301-242 6 Brandywine MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-242 7 Brandywine MD WASIDCRG7MD  508J CENTURYLINK COMMUNICATIONS, LLC 236      
301-242 8 Brandywine MD   515J IP HORIZON LLC 236      
301-242 9 Brandywine MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-243 A Washington Zone 2 MD BTHSMDWADS0  9212 VERIZON MARYLAND, INC. 236      
301-243 0 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236      
301-243 1 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236      
301-243 2 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236      
301-243 3 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236      
301-243 4 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236      
301-243 5 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236      
301-243 6 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236      
301-243 7 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236      
301-243 8 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236      
301-243 9 Washington Zone 2 MD   9212 VERIZON MARYLAND, INC. 236      
301-244 A Washington Zone 3 MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-244 0 Washington Zone 3 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-244 1 Washington Zone 3 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-244 2 Washington Zone 3 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-244 3 Washington Zone 3 MD HRNDVACKBMD  5977 BROADVIEW NETWORKS, INC. - DC 236      
301-244 4 Washington Zone 3 MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-244 5 Washington Zone 3 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-244 6 Washington Zone 3 MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-244 7 Washington Zone 3 MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-244 8 Washington Zone 3 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-244 9 Washington Zone 3 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-245 A Bittinger MD BTNRMDBRRS1  9212 VERIZON MARYLAND, INC. 240      
301-245 0 Bittinger MD   2593 CORE COMMUNICATIONS, INC.- MD 240      
301-245 1 Bittinger MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-245 2 Bittinger MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-245 3 Bittinger MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-245 4 Bittinger MD BTNRMDBRRS1  9212 VERIZON MARYLAND, INC. 240      
301-245 5 Bittinger MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
301-245 6 Bittinger MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-245 7 Bittinger MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-245 8 Bittinger MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
301-245 9 Bittinger MD FRDRMDFRXKX  508J CENTURYLINK COMMUNICATIONS, LLC 240      
301-246 A Nanjemoy MD NJMYMDNJRS0  9212 VERIZON MARYLAND, INC. 236      
301-246 0 Nanjemoy MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-246 1 Nanjemoy MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-246 2 Nanjemoy MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-246 3 Nanjemoy MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 >>

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.