Local Calling Guide

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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
301-485 9 Washington Zone 6 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
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   2018-10-23   
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   2018-10-23   
301-486 9 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
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   2019-04-29   
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      
301-489 6 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-489 7 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-489 8 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-489 9 Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-490 A Laurel MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-491 A Hagerstown MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-491 0 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-491 1 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-491 2 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-491 3 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-491 4 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-491 5 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-491 6 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-491 7 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-491 8 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-491 9 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-492 A Washington Zone 2 MD CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236      
301-493 A Washington Zone 2 MD BTHSMDWWDS0  9212 VERIZON MARYLAND, INC. 236      
301-494 A Washington Zone 15 (Baltimore LATA) MD PRFRMDPFRS1  9212 VERIZON MARYLAND, INC. 238      
301-494 0 Washington Zone 15 (Baltimore LATA) MD PRFRMDPFRS1  9212 VERIZON MARYLAND, INC. 238      
301-494 1 Washington Zone 15 (Baltimore LATA) MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-06-25   
301-494 2 Washington Zone 15 (Baltimore LATA) MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-03-27   
301-494 3 Washington Zone 15 (Baltimore LATA) MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-03-06   
301-494 4 Washington Zone 15 (Baltimore LATA) MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2011-03-11   
301-494 5 Washington Zone 15 (Baltimore LATA) MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2011-06-17   
301-494 6 Washington Zone 15 (Baltimore LATA) MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
301-494 7 Washington Zone 15 (Baltimore LATA) MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2011-06-17   
301-494 8 Washington Zone 15 (Baltimore LATA) MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-05   
301-494 9 Washington Zone 15 (Baltimore LATA) MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-05   

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Last updated: Fri, 10 Jul 2026 02:55:48 UTC

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