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.

OCN: 9212 VERIZON MARYLAND, INC.

<< 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 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
443-543 2 Arbutus MD   238      
443-543 3 Arbutus MD   238      
443-543 5 Arbutus MD   238      
443-546 A Columbia MD CLMAMDCBDS0  238      
443-546 1 Columbia MD   238      
443-550 6 North Beach MD   238   2004-10-01   
443-552 A Baltimore MD BLTMMDMDDS0  238      
443-552 2 Baltimore MD   238      
443-556 A Cockeysville MD   238      
443-558 5 Aberdeen MD   236   2010-05-10   
443-572 A Glen Burnie MD GLBRMDGLDS0  238      
443-572 0 Glen Burnie MD   238      
443-572 5 Glen Burnie MD   238      
443-572 8 Glen Burnie MD   238      
443-612 A Catonsville MD CTVLMDCTDS0  238      
443-627 A Baltimore MD BLTMMDCHDS2  238   2006-11-28   
443-634 A Waterloo (Washington DC LATA) MD ODTNMDAUDS0  236      
443-634 0 Waterloo (Washington DC LATA) MD   236   2012-01-08   
443-634 1 Waterloo (Washington DC LATA) MD   236   2012-01-08   
443-634 2 Waterloo (Washington DC LATA) MD   236   2012-01-08   
443-634 3 Waterloo (Washington DC LATA) MD   236   2012-01-08   
443-634 4 Waterloo (Washington DC LATA) MD   236   2012-01-08   
443-634 5 Waterloo (Washington DC LATA) MD   236   2012-01-08   
443-634 6 Waterloo (Washington DC LATA) MD   236   2012-01-08   
443-634 7 Waterloo (Washington DC LATA) MD   236   2012-01-08   
443-634 8 Waterloo (Washington DC LATA) MD   236   2012-01-08   
443-634 9 Waterloo (Washington DC LATA) MD   236   2012-01-08   
443-641 2 Pikesville MD   238   2004-10-10   
443-641 5 Pikesville MD   238   2004-10-10   
443-642 2 Baltimore MD   238   2007-01-08   
443-642 3 Baltimore MD   238   2007-01-08   
443-642 4 Baltimore MD   238   2007-01-08   
443-642 5 Baltimore MD   238   2007-01-08   
443-642 6 Baltimore MD   238   2007-01-08   
443-643 A Bel Air MD BLARMDBLDS0  238      
443-643 1 Bel Air MD   238      
443-643 2 Bel Air MD   238      
443-643 3 Bel Air MD   238      
443-643 4 Bel Air MD   238      
443-654 A Waterloo (Washington DC LATA) MD ODTNMDAUDS0  236   2008-09-27   
443-654 0 Waterloo (Washington DC LATA) MD   236   2008-09-27   
443-654 1 Waterloo (Washington DC LATA) MD   236   2008-09-27   
443-654 2 Waterloo (Washington DC LATA) MD   236   2008-09-27   
443-654 3 Waterloo (Washington DC LATA) MD   236   2008-09-27   
443-654 4 Waterloo (Washington DC LATA) MD   236   2008-09-27   
443-654 5 Waterloo (Washington DC LATA) MD   236   2008-09-27   
443-654 6 Waterloo (Washington DC LATA) MD   236   2008-09-27   
443-654 7 Waterloo (Washington DC LATA) MD   236   2008-09-27   
443-654 8 Waterloo (Washington DC LATA) MD   236   2008-09-27   
443-654 9 Waterloo (Washington DC LATA) MD   236   2008-09-27   

<< 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 >>

Last updated: Sat, 09 Mar 2019 02:16:03 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.