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.

Washington Zone 2, MD

1 2 3 4 5 6 7 8 9 10 11 12 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
227-200 A BTVLMD18GT6  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
227-200 0   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2023-12-08   
227-200 1   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-10-20   
227-200 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-10-20   
227-200 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-10-20   
227-200 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-10-20   
227-200 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-10-20   
227-200 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-10-20   
227-200 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-10-20   
227-200 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-10-07   
227-200 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-10-07   
227-224 A BTVLMD18GT6  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-02-05   
227-224 0   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-02-10   
227-224 1   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-02-10   
227-224 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-02-10   
227-224 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-02-10   
227-224 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-02-10   
227-224 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-02-10   
227-224 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-02-05   
227-224 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-02-05   
227-224 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-02-05   
227-224 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-02-05   
227-228 A VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-03-30   
227-228 0   876D ONVOY, LLC - MD 236   2024-03-30   
227-228 1   876D ONVOY, LLC - MD 236   2024-03-30   
227-228 2   876D ONVOY, LLC - MD 236   2024-03-30   
227-228 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-03-31   
227-228 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-03-31   
227-228 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-03-31   
227-228 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-03-31   
227-228 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-03-31   
227-228 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-03-31   
227-228 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-03-31   
227-233 A BTVLMD18GT6  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-04-08   
227-233 0   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2024-06-15   
227-233 1   478J NUSO, LLC 236   2024-06-17   
227-233 2   478J NUSO, LLC 236   2024-06-17   
227-233 3   478J NUSO, LLC 236   2024-06-17   
227-233 4   876D ONVOY, LLC - MD 236   2024-07-05   
227-233 5   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2024-07-14   
227-233 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-04-08   
227-233 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-04-08   
227-233 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-04-08   
227-233 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-04-08   
227-248 A VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-08-24   
227-248 0   876D ONVOY, LLC - MD 236   2024-08-24   
227-248 1   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-09-02   
227-248 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-10-04   
227-248 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-10-04   
227-248 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-10-04   
227-248 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-10-04   
227-248 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-10-04   
227-248 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-10-04   
227-248 8   876D ONVOY, LLC - MD 236   2024-10-04   
227-248 9   071F BANDWIDTH.COM CLEC, LLC - MD 236   2024-10-19   
227-256 A VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-12-05   
227-256 0   876D ONVOY, LLC - MD 236   2024-12-05   
227-256 1   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-06   
227-256 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-06   
227-256 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-06   
227-256 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-06   
227-256 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-06   
227-256 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-06   
227-256 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-31   
227-256 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-31   
227-256 9   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2024-12-17   
227-261 A BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-01-11   
227-261 0   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-01-11   
227-261 1   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-01-11   
227-261 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-01-11   
227-261 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-01-11   
227-261 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-01-11   
227-261 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-01-11   
227-261 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-01-11   
227-261 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-01-11   
227-261 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-01-11   
227-261 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-01-11   
227-266 A BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-02-02   
227-266 0   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-02-02   
227-266 1   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-02-02   
227-266 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-02-02   
227-266 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-02-02   
227-266 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-02-02   
227-266 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-02-02   
227-266 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-02-02   
227-266 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-02-02   
227-266 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-02-02   
227-266 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-02-02   
227-444 A   876D ONVOY, LLC - MD 236   2025-10-16   
227-444 4   876D ONVOY, LLC - MD 236   2025-10-16   
227-444 5   876D ONVOY, LLC - MD 236   2025-10-16   
227-444 6   876D ONVOY, LLC - MD 236   2025-10-16   
227-444 7   876D ONVOY, LLC - MD 236   2025-10-16   
227-444 8   876D ONVOY, LLC - MD 236   2025-10-19   
227-444 9   876D ONVOY, LLC - MD 236   2025-10-19   
227-997 A   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2025-04-11   
227-997 0   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2025-12-12   
227-997 1   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2025-12-12   
227-997 3   876D ONVOY, LLC - MD 236   2025-04-14   
227-997 7   876D ONVOY, LLC - MD 236   2025-05-10   

1 2 3 4 5 6 7 8 9 10 11 12 >>

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.