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: 661 [Rate centres in NPA 661] [Dial plan for NPA 661]

<< 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

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-998 6 Palmdale: Palmdale DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2008-10-23   
661-998 7 Palmdale: Palmdale DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2008-10-23   
661-998 8 Palmdale: Palmdale DA CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2007-07-30   
661-998 9 Palmdale: Palmdale DA CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2007-12-09   
661-999 A Edwards CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-999 1 Edwards CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-999 2 Edwards CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-999 3 Edwards CA BKFDCA11GMD  649C ONVOY, LLC - CA 734      
661-999 5 Edwards CA   965H FRACTEL, LLC 734   2020-06-26   

<< 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

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.