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.

Switch: BYMNPRCO1MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
787-476 A San Germán PR 559F NEUTRAL TANDEM - PR 820      
787-965 A Vega Baja PR 559F NEUTRAL TANDEM - PR 820      
939-359 A Moca PR 559F NEUTRAL TANDEM - PR 820      
939-369 A Aguada PR 559F NEUTRAL TANDEM - PR 820      
939-569 A Orocovis PR 559F NEUTRAL TANDEM - PR 820      
939-610 A Bayamón Sur PR 559F NEUTRAL TANDEM - PR 820      
939-629 A Santana PR 559F NEUTRAL TANDEM - PR 820      
939-739 A Toa Alta PR 559F NEUTRAL TANDEM - PR 820      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.