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

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-692 8 Washington Zone 11 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-24   
301-692 9 Washington Zone 11 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-24   
301-693 A Frederick MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-694 A Frederick MD FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
301-695 A Frederick MD FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
301-696 A Frederick MD FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
301-697 A Cumberland MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
301-698 A Frederick MD FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
301-699 A Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-701 A Washington Zone 13 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-701 0 Washington Zone 13 MD   5562 METROPCS, INC. 236   2018-04-08   
301-701 1 Washington Zone 13 MD   624H ONVOY SPECTRUM, LLC 236   2024-12-05   
301-701 2 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2020-12-03   
301-701 3 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2020-12-03   
301-701 4 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2020-12-03   
301-701 5 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2020-12-03   
301-701 6 Washington Zone 13 MD   197D VONAGE AMERICA LLC 236   2020-05-20   
301-701 7 Washington Zone 13 MD   624H ONVOY SPECTRUM, LLC 236   2024-12-05   
301-701 8 Washington Zone 13 MD   624H ONVOY SPECTRUM, LLC 236   2024-12-05   
301-701 9 Washington Zone 13 MD   624H ONVOY SPECTRUM, LLC 236   2024-12-05   
301-702 A Washington Zone 5 MD TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-703 A Mount Airy MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
301-703 0 Mount Airy MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2014-05-05   
301-703 1 Mount Airy MD   318J COMCAST IP PHONE, LLC 240   2015-09-17   
301-703 2 Mount Airy MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2006-05-20   
301-703 3 Mount Airy MD   829J PAETEC ITEL, LLC 240   2009-11-16   
301-703 4 Mount Airy MD   9212 VERIZON MARYLAND, INC. 240   2004-11-17   
301-703 5 Mount Airy MD   318J COMCAST IP PHONE, LLC 240   2012-05-26   
301-703 6 Mount Airy MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 240   2013-06-10   
301-703 7 Mount Airy MD   624H ONVOY SPECTRUM, LLC 240   2021-11-08   
301-703 8 Mount Airy MD   318J COMCAST IP PHONE, LLC 240   2007-04-07   
301-703 9 Mount Airy MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2005-02-17   
301-704 A Washington Zone 3 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-705 A Waldorf MD WDRFMDWDDS0  9212 VERIZON MARYLAND, INC. 236      
301-705 0 Waldorf MD   9212 VERIZON MARYLAND, INC. 236      
301-705 2 Waldorf MD   9212 VERIZON MARYLAND, INC. 236      
301-705 3 Waldorf MD   9212 VERIZON MARYLAND, INC. 236      
301-705 4 Waldorf MD   9212 VERIZON MARYLAND, INC. 236      
301-705 5 Waldorf MD   9212 VERIZON MARYLAND, INC. 236      
301-705 6 Waldorf MD   9212 VERIZON MARYLAND, INC. 236      
301-705 7 Waldorf MD   9212 VERIZON MARYLAND, INC. 236      
301-705 8 Waldorf MD   9212 VERIZON MARYLAND, INC. 236      
301-705 9 Waldorf MD   9212 VERIZON MARYLAND, INC. 236      
301-706 A Washington Zone 3 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-707 A Cumberland MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-708 A Laurel (Baltimore LATA) MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
301-708 0 Laurel (Baltimore LATA) MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
301-708 1 Laurel (Baltimore LATA) MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-11-18   
301-708 2 Laurel (Baltimore LATA) MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
301-708 3 Laurel (Baltimore LATA) MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-09-12   
301-708 4 Laurel (Baltimore LATA) MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2014-09-01   
301-708 5 Laurel (Baltimore LATA) MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-12-16   
301-708 6 Laurel (Baltimore LATA) MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-12-16   
301-708 7 Laurel (Baltimore LATA) MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2014-09-01   
301-708 8 Laurel (Baltimore LATA) MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-11-18   
301-708 9 Laurel (Baltimore LATA) MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-11-18   
301-709 A Cumberland MD CMLDMDCMX0X  425J CSC WIRELESS, LLC 240      
301-709 0 Cumberland MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2020-09-11   
301-709 1 Cumberland MD   876D ONVOY, LLC - MD 240   2020-11-07   
301-709 2 Cumberland MD   425J CSC WIRELESS, LLC 240   2019-07-19   
301-709 3 Cumberland MD   876D ONVOY, LLC - MD 240   2020-01-05   
301-709 4 Cumberland MD   876D ONVOY, LLC - MD 240   2020-01-05   
301-709 5 Cumberland MD   876D ONVOY, LLC - MD 240   2020-02-10   
301-709 6 Cumberland MD   876D ONVOY, LLC - MD 240   2020-02-10   
301-709 7 Cumberland MD   876D ONVOY, LLC - MD 240   2020-02-10   
301-709 8 Cumberland MD   876D ONVOY, LLC - MD 240   2020-02-10   
301-709 9 Cumberland MD   876D ONVOY, LLC - MD 240   2020-11-07   
301-710 A Waldorf MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-710 0 Waldorf MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2007-10-17   
301-710 1 Waldorf MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2007-12-04   
301-710 2 Waldorf MD   5562 METROPCS, INC. 236   2010-11-10   
301-710 3 Waldorf MD   5562 METROPCS, INC. 236   2010-11-10   
301-710 4 Waldorf MD   5562 METROPCS, INC. 236   2010-11-10   
301-710 5 Waldorf MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-02-20   
301-710 6 Waldorf MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-02-20   
301-710 7 Waldorf MD   5562 METROPCS, INC. 236   2010-11-10   
301-710 8 Waldorf MD   5562 METROPCS, INC. 236   2010-11-10   
301-710 9 Waldorf MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2007-10-26   
301-712 A Frederick MD FRDRMDFRX7X  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 240      
301-712 0 Frederick MD   5562 METROPCS, INC. 240   2004-10-03   
301-712 1 Frederick MD   5562 METROPCS, INC. 240   2004-10-03   
301-712 2 Frederick MD   5562 METROPCS, INC. 240   2005-02-11   
301-712 3 Frederick MD   5562 METROPCS, INC. 240   2005-12-10   
301-712 4 Frederick MD   876D ONVOY, LLC - MD 240   2026-01-19   
301-712 5 Frederick MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240   2006-04-24   
301-712 6 Frederick MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240   2006-04-24   
301-712 7 Frederick MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240   2006-04-24   
301-712 8 Frederick MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240   2006-04-24   
301-712 9 Frederick MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 240   2004-09-13   
301-713 A Washington Zone 3 MD SLSPMDSSDSS  9212 VERIZON MARYLAND, INC. 236      
301-714 A Hagerstown MD HGTWMDHGDS0  9212 VERIZON MARYLAND, INC. 240      
301-714 0 Hagerstown MD   9212 VERIZON MARYLAND, INC. 240      
301-714 1 Hagerstown MD   9212 VERIZON MARYLAND, INC. 240      
301-714 2 Hagerstown MD   9212 VERIZON MARYLAND, INC. 240      
301-714 3 Hagerstown MD   9212 VERIZON MARYLAND, INC. 240      
301-714 4 Hagerstown MD   9212 VERIZON MARYLAND, INC. 240      
301-714 5 Hagerstown MD   9212 VERIZON MARYLAND, INC. 240      
301-714 6 Hagerstown MD   9212 VERIZON MARYLAND, INC. 240      
301-714 7 Hagerstown MD   9212 VERIZON MARYLAND, INC. 240      
301-714 8 Hagerstown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240   2015-11-27   

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Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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