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.

Waldorf, MD

<< 1 2 3 4 5 6 7 8 9 10 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-210 0 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-210 1 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-210 2 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-210 3 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-210 4 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-210 5 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-210 6 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-210 7 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2021-11-20   
240-210 8 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2007-07-27   
240-210 9 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-04-29   
240-213 A WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-213 0 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-01-03   
240-213 1 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-01-03   
240-213 2 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-01-03   
240-213 3 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-04-30   
240-213 4 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-04-30   
240-213 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-01-03   
240-213 6 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-10-17   
240-213 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-10-17   
240-213 8 VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-01-03   
240-213 9 WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-216 A BTVLMD12CMA  5562 METROPCS, INC. 236      
240-216 0 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-216 1 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-216 2 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-216 3 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-216 4 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-216 5 BTVLMD12CMA  5562 METROPCS, INC. 236   2010-11-10   
240-216 6 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-216 7 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-216 8 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-216 9 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2010-12-14   
240-222 A   829J PAETEC ITEL, LLC 236   2025-04-02   
240-222 0 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-09-02   
240-222 1 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-08-09   
240-222 2 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2005-06-02   
240-222 3 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2005-07-25   
240-222 4   829J PAETEC ITEL, LLC 236      
240-222 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-08-09   
240-222 6 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-06-11   
240-222 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-06-11   
240-222 8 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-06-11   
240-222 9   829J PAETEC ITEL, LLC 236      
240-229 A MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-229 0 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-229 1 BTVLMD12CMA  5562 METROPCS, INC. 236   2005-04-20   
240-229 2   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2005-09-19   
240-229 3 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2021-10-17   
240-229 4 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2021-10-17   
240-229 5 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2010-08-28   

<< 1 2 3 4 5 6 7 8 9 10 >>

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.