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 95 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-981 A Washington Zone 5 MD LARLMDCC5MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236      
301-982 A Washington Zone 13 MD CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-983 A Washington Zone 10 MD BTHSMDBDDS0  9212 VERIZON MARYLAND, INC. 236      
301-984 A Washington Zone 11 MD RKVLMDMRDS0  9212 VERIZON MARYLAND, INC. 236      
301-985 A Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-985 0 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-985 1 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-985 2 Washington Zone 4 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-01-01   
301-985 3 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-985 4 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-985 5 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-985 6 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-985 7 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-985 8 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-985 9 Washington Zone 4 MD HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-986 A Washington Zone 2 MD CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236      
301-987 A Gaithersburg MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-988 A Hagerstown MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-988 0 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-988 1 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-988 2 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-988 3 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-988 4 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-988 5 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-988 6 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-988 7 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-988 8 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-988 9 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-989 A Washington Zone 12 MD SLSPMDCVDS0  9212 VERIZON MARYLAND, INC. 236      
301-990 A Gaithersburg MD GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-991 A Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-991 0 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-991 1 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-991 2 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-991 3 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-991 4 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-991 5 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-991 6 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-991 7 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-991 8 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-991 9 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-992 A Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-992 0 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-992 1 Hagerstown MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
301-992 2 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-992 3 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-992 4 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-992 5 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-992 6 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      
301-992 7 Hagerstown MD FRDRMDFRKMD  5562 METROPCS, INC. 240      

<< 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 95 >>

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.