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
301-563 7 Washington Zone 3 MD SLSPMDSSDS0  9212 VERIZON MARYLAND, INC. 236      
301-563 8 Washington Zone 3 MD SLSPMDSSDS0  9212 VERIZON MARYLAND, INC. 236      
301-563 9 Washington Zone 3 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2007-12-04   
301-564 A Washington Zone 2 MD BTHSMDWWDS0  9212 VERIZON MARYLAND, INC. 236      
301-565 A Washington Zone 3 MD SLSPMDSSDS0  9212 VERIZON MARYLAND, INC. 236      
301-566 A Washington Zone 13 MD MRKKMDMKDS0  9212 VERIZON MARYLAND, INC. 236      
301-567 A Washington Zone 6 MD OXHLMDOHDS0  9212 VERIZON MARYLAND, INC. 236      
301-568 A Washington Zone 5 MD STLDMDSLDS0  9212 VERIZON MARYLAND, INC. 236      
301-569 A Gaithersburg MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-569 0 Gaithersburg MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2013-09-17   
301-569 1 Gaithersburg MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2014-05-01   
301-569 2 Gaithersburg MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-07   
301-569 3 Gaithersburg MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2014-06-01   
301-569 4 Gaithersburg MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2013-12-10   
301-569 5 Gaithersburg MD WASIDCRG7MD  508J CENTURYLINK COMMUNICATIONS, LLC 236   2013-10-01   
301-569 6 Gaithersburg MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2011-09-08   
301-569 7 Gaithersburg MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2012-01-14   
301-569 8 Gaithersburg MD WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2011-09-02   
301-569 9 Gaithersburg MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2012-04-05   
301-570 A Ashton MD OLNYMDOKDS0  9212 VERIZON MARYLAND, INC. 236      
301-571 A Washington Zone 2 MD BTHSMDWWDS0  9212 VERIZON MARYLAND, INC. 236      
301-572 A Washington Zone 3 MD BTVLMDBVDS0  9212 VERIZON MARYLAND, INC. 236      
301-573 A Hagerstown MD FRDRMDFRKMD  4098 SPRINT SPECTRUM, LP - MD 240      
301-573 0 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-573 1 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-573 2 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-573 3 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-573 4 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-573 5 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-573 6 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-573 7 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-573 8 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-573 9 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-574 A Washington Zone 15 MD MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 0 Washington Zone 15 MD MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 1 Washington Zone 15 MD MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 2 Washington Zone 15 MD MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 3 Washington Zone 15 MD MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 4 Washington Zone 15 MD MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 5 Washington Zone 15 MD MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 6 Washington Zone 15 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
301-574 7 Washington Zone 15 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2018-11-29   
301-574 8 Washington Zone 15 MD MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 9 Washington Zone 15 MD MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-575 A Laurel MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
301-575 0 Laurel MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
301-575 1 Laurel MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
301-575 2 Laurel MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
301-575 3 Laurel MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
301-575 4 Laurel MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-01-02   

<< 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: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.