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
301-473 2 Frederick MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
301-473 3 Frederick MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
301-473 4 Frederick MD BRHGMDBHRS1  9212 VERIZON MARYLAND, INC. 240      
301-473 5 Frederick MD BRHGMDBHRS1  9212 VERIZON MARYLAND, INC. 240      
301-473 6 Frederick MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-473 7 Frederick MD BRHGMDBHRS1  9212 VERIZON MARYLAND, INC. 240      
301-473 8 Frederick MD BRHGMDBHRS1  9212 VERIZON MARYLAND, INC. 240      
301-473 9 Frederick MD BRHGMDBHRS1  9212 VERIZON MARYLAND, INC. 240      
301-474 A Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-475 A Leonardtown MD LNTWMDLTRS0  9212 VERIZON MARYLAND, INC. 236      
301-476 A Ashton MD SLSPMDCVDS0  9212 VERIZON MARYLAND, INC. 236      
301-476 0 Ashton MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-476 1 Ashton MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-476 2 Ashton MD SLSPMDCVDS0  9212 VERIZON MARYLAND, INC. 236      
301-476 3 Ashton MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-476 4 Ashton MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-476 5 Ashton MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-476 6 Ashton MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-476 7 Ashton MD SLSPMDCVDS0  9212 VERIZON MARYLAND, INC. 236      
301-476 8 Ashton MD SLSPMDCVDS0  9212 VERIZON MARYLAND, INC. 236      
301-476 9 Ashton MD SLSPMDCVDS0  9212 VERIZON MARYLAND, INC. 236      
301-477 A Washington Zone 13 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-477 0 Washington Zone 13 MD   876D ONVOY, LLC - MD 236      
301-477 1 Washington Zone 13 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-477 2 Washington Zone 13 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-477 3 Washington Zone 13 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-477 4 Washington Zone 13 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-477 5 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-477 6 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-477 7 Washington Zone 13 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-477 8 Washington Zone 13 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-477 9 Washington Zone 13 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-478 A Flintstone MD FLNTMDFSRS0  9212 VERIZON MARYLAND, INC. 240      
301-478 0 Flintstone MD   2593 CORE COMMUNICATIONS, INC.- MD 240      
301-478 1 Flintstone MD CMLDMDCH0MD  228C IDT AMERICA, CORP. - MD 240      
301-478 2 Flintstone MD FLNTMDFSRS0  9212 VERIZON MARYLAND, INC. 240      
301-478 3 Flintstone MD FLNTMDFSRS0  9212 VERIZON MARYLAND, INC. 240      
301-478 4 Flintstone MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-478 5 Flintstone MD OLTWMDOTRS0  9212 VERIZON MARYLAND, INC. 240      
301-478 6 Flintstone MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-478 7 Flintstone MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
301-478 8 Flintstone MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
301-478 9 Flintstone MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
301-479 A Washington Zone 13 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-479 0 Washington Zone 13 MD   876D ONVOY, LLC - MD 236      
301-479 1 Washington Zone 13 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-479 2 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-479 3 Washington Zone 13 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-479 4 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-479 5 Washington Zone 13 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-479 6 Washington Zone 13 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-479 7 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-479 8 Washington Zone 13 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-479 9 Washington Zone 13 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-480 A Washington Zone 2 MD BTHSMDRPDS0  9212 VERIZON MARYLAND, INC. 236      
301-481 A Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-482 A Damascus MD DMSCMDDEDS0  9212 VERIZON MARYLAND, INC. 236      
301-482 0 Damascus MD DMSCMDDEDS0  9212 VERIZON MARYLAND, INC. 236      
301-482 1 Damascus MD DMSCMDDEDS0  9212 VERIZON MARYLAND, INC. 236      
301-482 2 Damascus MD DMSCMDDEDS0  9212 VERIZON MARYLAND, INC. 236      
301-482 3 Damascus MD DMSCMDDEDS0  9212 VERIZON MARYLAND, INC. 236      
301-482 4 Damascus MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-482 5 Damascus MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-482 6 Damascus MD DMSCMDDEDS0  9212 VERIZON MARYLAND, INC. 236      
301-482 7 Damascus MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-482 8 Damascus MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-482 9 Damascus MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-483 A Laurel MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-484 A Washington Zone 4 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-485 A Washington Zone 6 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-485 0 Washington Zone 6 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-485 1 Washington Zone 6 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-485 2 Washington Zone 6 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-485 3 Washington Zone 6 MD HRNDVACKBMD  9170 BROADVIEW NETWORKS, INC. - MD 236      
301-485 4 Washington Zone 6 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-485 5 Washington Zone 6 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-485 6 Washington Zone 6 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-485 7 Washington Zone 6 MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-485 8 Washington Zone 6 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-485 9 Washington Zone 6 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-486 A Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-486 0 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-486 1 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-486 2 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-486 3 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-486 4 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-486 5 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-486 6 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-486 7 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-486 8 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-486 9 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-487 A Myersville MD MYVLMDMVRS0  9212 VERIZON MARYLAND, INC. 240      
301-488 A Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-489 A Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-489 0 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-489 1 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-489 2 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-489 3 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-489 4 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-489 5 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 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.