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 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-261 A Washington Zone 14 (Baltimore LATA) MD COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-262 A Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-263 A Washington Zone 2 MD BTHSMDWADS0  9212 VERIZON MARYLAND, INC. 236      
301-263 0 Washington Zone 2 MD BTHSMDWADS0  9212 VERIZON MARYLAND, INC. 236      
301-263 1 Washington Zone 2 MD BTHSMDWADS0  9212 VERIZON MARYLAND, INC. 236      
301-263 2 Washington Zone 2 MD BTHSMDWADS0  9212 VERIZON MARYLAND, INC. 236      
301-263 3 Washington Zone 2 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-02-14   
301-263 4 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-03-20   
301-263 5 Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-06-08   
301-263 6 Washington Zone 2 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2005-08-15   
301-263 7 Washington Zone 2 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2005-08-15   
301-263 8 Washington Zone 2 MD LARLMDCCDS0  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 236   2004-04-06   
301-263 9 Washington Zone 2 MD BTHSMDWADS0  9212 VERIZON MARYLAND, INC. 236      
301-264 A Mount Savage MD MTSVMDMSRS0  9212 VERIZON MARYLAND, INC. 240      
301-264 1 Mount Savage MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2004-03-28   
301-264 2 Mount Savage MD CMLDMDCH0MD  228C IDT AMERICA, CORP. - MD 240   2006-03-10   
301-264 3 Mount Savage MD MTSVMDMSRS0  9212 VERIZON MARYLAND, INC. 240      
301-264 4 Mount Savage MD MTSVMDMSRS0  9212 VERIZON MARYLAND, INC. 240      
301-264 5 Mount Savage MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2012-08-24   
301-264 6 Mount Savage MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-03-01   
301-264 7 Mount Savage MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-07-04   
301-264 8 Mount Savage MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-11-07   
301-264 9 Mount Savage MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2021-07-11   
301-265 A Washington Zone 6 MD ALTWMDATRP0  9212 VERIZON MARYLAND, INC. 236      
301-265 0 Washington Zone 6 MD ALTWMDATRP0  9212 VERIZON MARYLAND, INC. 236      
301-265 1 Washington Zone 6 MD ALTWMDATRP0  9212 VERIZON MARYLAND, INC. 236      
301-265 2 Washington Zone 6 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-10-24   
301-265 3 Washington Zone 6 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-10-24   
301-265 4 Washington Zone 6 MD OCQNVAXAVMD  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2002-11-30   
301-265 5 Washington Zone 6 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-05-14   
301-265 6 Washington Zone 6 MD BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-07-23   
301-265 7 Washington Zone 6 MD WASIDCRG7MD  508J CENTURYLINK COMMUNICATIONS, LLC 236   2014-06-25   
301-265 8 Washington Zone 6 MD ALTWMDATRP0  9212 VERIZON MARYLAND, INC. 236      
301-265 9 Washington Zone 6 MD ALTWMDATRP0  9212 VERIZON MARYLAND, INC. 236      
301-266 A Waldorf MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-267 A Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-267 0 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2011-11-28   
301-267 1 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2011-11-28   
301-267 2 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2011-11-28   
301-267 3 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2011-11-28   
301-267 4 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2011-11-28   
301-267 5 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2011-11-28   
301-267 6 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2011-11-28   
301-267 7 Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2011-11-28   
301-267 8 Washington Zone 3 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2011-11-28   
301-268 A Cumberland MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-269 A Washington Zone 2 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-269 0 Washington Zone 2 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-05-29   
301-269 1 Washington Zone 2 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-05-29   
301-269 2 Washington Zone 2 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-05-29   

<< 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 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.