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: 568G PEERLESS NETWORK OF MARYLAND, LLC

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

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
240-509 6 Washington Zone 14 (Baltimore LATA) MD BLTQMD01DS0  238   2019-12-28   
240-509 8 Washington Zone 14 (Baltimore LATA) MD BLTQMD01DS0  238   2013-05-05   
240-512 5 Washington Zone 13 (Baltimore LATA) MD BLTQMD01DS0  238   2012-11-23   
240-514 6 Washington Zone 11 MD SLSPMD91DS0  236   2020-04-19   
240-518 0 Waldorf MD WASHDC12DS6  236   2023-07-24   
240-524 A Laurel MD WASHDC12DS6  236      
240-524 4 Laurel MD WASHDC12DS6  236      
240-524 5 Laurel MD WASHDC12DS6  236      
240-524 7 Laurel MD WASHDC12DS6  236      
240-524 9 Laurel MD WASHDC12DS6  236      
240-525 A Washington Zone 15 MD WASHDC12DS6  236      
240-525 9 Washington Zone 15 MD WASHDC12DS6  236      
240-526 A Leonardtown MD WASHDC12DS6  236      
240-526 9 Leonardtown MD WASHDC12DS6  236      
240-530 8 Waldorf MD WASHDC12DS6  236   2013-10-26   
240-536 A Ashton MD WASHDC12DS6  236      
240-536 9 Ashton MD WASHDC12DS6  236      
240-539 A Washington Zone 4 MD SLSPMD91DS0  236      
240-539 3 Washington Zone 4 MD SLSPMD91DS0  236   2020-04-19   
240-539 5 Washington Zone 4 MD SLSPMD91DS0  236   2020-09-05   
240-539 9 Washington Zone 4 MD SLSPMD91DS0  236      
240-540 3 Washington Zone 13 (Baltimore LATA) MD BLTQMD01DS0  238   2020-03-18   
240-545 7 Washington Zone 15 MD WASHDC12DS6  236   2010-08-19   
240-549 8 Frederick MD HGTWMD53DS0  240   2018-03-09   
240-558 0 Washington Zone 11 MD SLSPMD91DS0  236   2013-05-03   
240-558 9 Washington Zone 11 MD SLSPMD91DS0  236   2013-05-03   
240-563 4 Washington Zone 5 MD SLSPMD91DS0  236   2018-11-20   
240-563 7 Washington Zone 5 MD SLSPMD91DS0  236   2018-06-24   
240-590 6 Washington Zone 12 MD SLSPMD91DS0  236   2020-02-26   
240-591 0 Hagerstown MD HGTWMD53DS0  240   2020-04-15   
240-597 A Gaithersburg MD SLSPMD91DS0  236      
240-597 0 Gaithersburg MD SLSPMD91DS0  236      
240-597 1 Gaithersburg MD SLSPMD91DS0  236      
240-597 7 Gaithersburg MD SLSPMD91DS0  236   2019-12-28   
240-597 9 Gaithersburg MD SLSPMD91DS0  236      
240-598 3 Hughesville MD SLSPMD91DS0  236   2019-06-24   
240-625 9 Hagerstown MD HGTWMD53DS0  240   2004-01-25   
240-635 3 Tompkinsville MD WASHDC12DS6  236   2019-12-18   
240-641 A Washington Zone 3 MD SLSPMD91DS0  236      
240-641 9 Washington Zone 3 MD SLSPMD91DS0  236   2015-06-13   
240-642 3 Washington Zone 10 MD SLSPMD91DS0  236   2019-11-17   
240-648 3 Keedysville MD HGTWMD53DS0  240   2018-11-20   
240-649 3 Smithsburg MD HGTWMD53DS0  240   2018-11-20   
240-649 8 Smithsburg MD HGTWMD53DS0  240   2023-10-28   
240-650 1 Washington Zone 3 MD WASHDC12DS6  236   2012-09-15   
240-652 7 Mechanicsville MD WASHDC12DS6  236   2013-10-26   
240-653 A Laurel (Baltimore LATA) MD BLTQMD01DS0  238      
240-653 3 Laurel (Baltimore LATA) MD BLTQMD01DS0  238   2020-03-18   
240-653 5 Laurel (Baltimore LATA) MD BLTQMD01DS0  238   2018-11-18   
240-656 6 Frederick MD HGTWMD53DS0  240   2020-10-28   

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

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.