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: 4129 O1 COMMUNICATIONS, INC. - CA

<< 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

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
951-901 4 Woodcrest CA   730      
951-934 A Mira Loma CA LSANCARCD9S  730   2006-10-09   
951-934 1 Mira Loma CA   730   2006-10-09   
951-934 2 Mira Loma CA   730   2006-10-09   

<< 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

Last updated: Wed, 01 Apr 2020 02:09:16 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.