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.

Frederick, MD

1 2 3 4 5 6 7 8 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
227-203 A FRDRMDFRX7X  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 240      
227-203 0 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
227-203 1 FRDRMDFRX7X  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 240      
227-203 2 FRDRMDFRX7X  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 240      
227-203 3 FRDRMDFRX7X  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 240      
227-203 4 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
227-203 5 CMLDMDCMUMD  073H TELNYX LLC 240      
227-203 6 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
227-203 7   876D ONVOY, LLC - MD 240      
227-203 8   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
227-203 9 HGTWMD53DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 240      
227-223 A HGTWMD539MD  939H COMMIO, LLC 240   2024-01-22   
227-223 0 HGTWMD539MD  939H COMMIO, LLC 240      
227-223 1 HGTWMD539MD  939H COMMIO, LLC 240      
227-223 2 HGTWMD539MD  939H COMMIO, LLC 240      
227-223 3 HGTWMD53FMD  490J DISH WIRELESS, LLC 240      
227-223 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
227-223 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
227-223 7   071F BANDWIDTH.COM CLEC, LLC - MD 240      
227-223 8   071F BANDWIDTH.COM CLEC, LLC - MD 240      
227-223 9   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
227-226 A   876D ONVOY, LLC - MD 240   2024-03-30   
227-226 0   876D ONVOY, LLC - MD 240      
227-226 1   876D ONVOY, LLC - MD 240      
227-226 2   876D ONVOY, LLC - MD 240      
227-226 3   876D ONVOY, LLC - MD 240      
227-226 4   876D ONVOY, LLC - MD 240      
227-226 5   876D ONVOY, LLC - MD 240      
227-226 6   876D ONVOY, LLC - MD 240      
227-226 7   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
227-226 8   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
227-226 9   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
227-253 A   876D ONVOY, LLC - MD 240   2024-11-17   
227-253 0   876D ONVOY, LLC - MD 240      
227-253 1   732J NUSO, LLC 240      
227-253 2   732J NUSO, LLC 240      
227-253 3   732J NUSO, LLC 240      
227-253 4   876D ONVOY, LLC - MD 240      
227-253 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
227-253 8   073H TELNYX LLC 240      
227-253 9   073H TELNYX LLC 240      
227-800 A   624H ONVOY SPECTRUM, LLC 240   2025-01-02   
227-800 0   624H ONVOY SPECTRUM, LLC 240      
227-800 2   624H ONVOY SPECTRUM, LLC 240      
227-800 6   624H ONVOY SPECTRUM, LLC 240      
227-800 8   624H ONVOY SPECTRUM, LLC 240      
227-800 9   624H ONVOY SPECTRUM, LLC 240      
240-215 A FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
240-215 0 FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
240-215 1 FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
240-215 2 MNRVMDMODS1  7421 AT&T - LOCAL 240      
240-215 3 FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
240-215 4 FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
240-215 5 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-215 6 FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
240-215 7 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-215 8 FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
240-215 9 FRDRMDFRXPX  624H ONVOY SPECTRUM, LLC 240      
240-225 A HGTWMD53DS0  2593 CORE COMMUNICATIONS, INC.- MD 240      
240-236 A FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-236 0 FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-236 1 FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-236 2 FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-236 3 FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-236 4 FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-236 5 FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-236 6 FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-236 7 FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-236 8 FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-236 9 FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
240-285 A FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-285 0 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-285 1 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-285 2 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-285 3 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-285 4 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-285 5 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-285 6 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-285 7 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-285 8 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-285 9 HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
240-315 A FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-315 0 FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-315 1 FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
240-315 2 FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
240-315 3 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-315 4 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-315 5 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-315 6 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-315 7 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-315 8 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-315 9 FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-344 A MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
240-344 0 MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
240-344 1 MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
240-344 2 MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
240-344 3 MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
240-344 4 MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
240-344 5 MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
240-344 6 MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      

1 2 3 4 5 6 7 8 >>

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.