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
301-854 2 Ashton (Baltimore LATA) MD CLVLMDCERP0  9212 VERIZON MARYLAND, INC. 238      
301-854 3 Ashton (Baltimore LATA) MD CLVLMDCERP0  9212 VERIZON MARYLAND, INC. 238      
301-854 4 Ashton (Baltimore LATA) MD GLWDMDGDRS1  9212 VERIZON MARYLAND, INC. 238      
301-854 5 Ashton (Baltimore LATA) MD GLWDMDGDRS1  9212 VERIZON MARYLAND, INC. 238      
301-854 6 Ashton (Baltimore LATA) MD GLWDMDGDRS1  9212 VERIZON MARYLAND, INC. 238      
301-854 7 Ashton (Baltimore LATA) MD GLWDMDGDRS1  9212 VERIZON MARYLAND, INC. 238      
301-854 8 Ashton (Baltimore LATA) MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
301-854 9 Ashton (Baltimore LATA) MD CLVLMDCERP0  9212 VERIZON MARYLAND, INC. 238      
301-855 A Washington Zone 15 (Baltimore LATA) MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-856 A Washington Zone 16 MD CLTNMDCLDS0  9212 VERIZON MARYLAND, INC. 236      
301-857 A Clear Spring MD HGTWMD53DS0  2593 CORE COMMUNICATIONS, INC.- MD 240      
301-857 0 Clear Spring MD FRDRMDFRPS0  2593 CORE COMMUNICATIONS, INC.- MD 240   2002-09-10   
301-857 1 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2012-10-06   
301-857 2 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2014-10-20   
301-857 3 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-10-29   
301-857 4 Clear Spring MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2016-09-12   
301-857 5 Clear Spring MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2016-09-12   
301-857 6 Clear Spring MD FRDRMDFRXKX  508J CENTURYLINK COMMUNICATIONS, LLC 240   2016-10-26   
301-857 7 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-05-17   
301-857 8 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2006-08-22   
301-857 9 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-05-17   
301-858 A Washington Zone 14 (Baltimore LATA) MD COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-859 A Oakland MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
301-859 0 Oakland MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2004-11-27   
301-859 1 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2019-05-02   
301-859 2 Oakland MD FRDRMDFRXAX  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 240   2019-04-22   
301-859 3 Oakland MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2002-03-10   
301-859 4 Oakland MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2004-05-27   
301-859 5 Oakland MD FRDRMDFRKMD  5562 METROPCS, INC. 240   2019-01-04   
301-859 6 Oakland MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2020-01-06   
301-859 7 Oakland MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2020-01-06   
301-859 8 Oakland MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2009-10-29   
301-859 9 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2019-05-02   
301-860 A Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 0 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 1 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 2 Washington Zone 14 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2016-12-25   
301-860 3 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 4 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 5 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 6 Washington Zone 14 MD BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-860 7 Washington Zone 14 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2015-02-05   
301-860 8 Washington Zone 14 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-860 9 Washington Zone 14 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2018-04-16   
301-861 A Waldorf MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-861 0 Waldorf MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-02-20   
301-861 1 Waldorf MD   829J PAETEC ITEL, LLC 236   2005-10-07   
301-861 2 Waldorf MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2006-08-01   
301-861 3 Waldorf MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-10-10   
301-861 4 Waldorf MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      

<< 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, 31 Mar 2026 13:56:49 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.