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: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

<< 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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-629 6 Berlin MD   9212 VERIZON MARYLAND, INC. 242   2004-10-06   
410-629 7 Berlin MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-02   
410-629 8 Berlin MD   281E YMAX COMMUNICATIONS CORP. - MD 242   2011-04-03   
410-629 9 Berlin MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2005-03-24   
410-630 A Chase MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-630 0 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
410-630 1 Chase MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-12-12   
410-630 2 Chase MD   318J COMCAST IP PHONE, LLC 238   2005-03-10   
410-630 3 Chase MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-14   
410-630 4 Chase MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-02-07   
410-630 5 Chase MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-14   
410-630 6 Chase MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-14   
410-630 7 Chase MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-14   
410-630 8 Chase MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-12-12   
410-630 9 Chase MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-631 A Baltimore MD DNDLMDDNDS0  9212 VERIZON MARYLAND, INC. 238      
410-631 0 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-631 1 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-631 2 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-631 3 Baltimore MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2020-10-12   
410-631 4 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-631 5 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-631 6 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-631 7 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-631 8 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-631 9 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-632 A Snow Hill MD SNHLMDSHRS0  9212 VERIZON MARYLAND, INC. 242      
410-632 0 Snow Hill MD   9212 VERIZON MARYLAND, INC. 242      
410-632 1 Snow Hill MD   9212 VERIZON MARYLAND, INC. 242      
410-632 2 Snow Hill MD   9212 VERIZON MARYLAND, INC. 242      
410-632 3 Snow Hill MD   9212 VERIZON MARYLAND, INC. 242      
410-632 4 Snow Hill MD   9212 VERIZON MARYLAND, INC. 242      
410-632 5 Snow Hill MD   9212 VERIZON MARYLAND, INC. 242      
410-632 6 Snow Hill MD   876D ONVOY, LLC - MD 242   2018-09-13   
410-632 7 Snow Hill MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2004-04-03   
410-632 8 Snow Hill MD   073H TELNYX LLC 242   2017-09-13   
410-632 9 Snow Hill MD   9212 VERIZON MARYLAND, INC. 242      
410-633 A Baltimore MD DNDLMDDNDS0  9212 VERIZON MARYLAND, INC. 238      
410-634 A Ridgely MD HLBOMDTKRS0  9212 VERIZON MARYLAND, INC. 242      
410-634 0 Ridgely MD   624H ONVOY SPECTRUM, LLC 242   2023-09-02   
410-634 1 Ridgely MD   9212 VERIZON MARYLAND, INC. 242      
410-634 2 Ridgely MD   9212 VERIZON MARYLAND, INC. 242      
410-634 3 Ridgely MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2004-04-03   
410-634 4 Ridgely MD   228C IDT AMERICA, CORP. - MD 242   2012-06-01   
410-634 5 Ridgely MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-02   
410-634 6 Ridgely MD   073H TELNYX LLC 242   2017-09-13   
410-634 7 Ridgely MD   876D ONVOY, LLC - MD 242   2017-04-14   
410-634 8 Ridgely MD   318J COMCAST IP PHONE, LLC 242   2006-07-31   
410-634 9 Ridgely MD   9212 VERIZON MARYLAND, INC. 242   2003-12-31   
410-635 A New Windsor MD NWWNMDNWRS0  9212 VERIZON MARYLAND, INC. 238      

<< 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 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.