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: 939 [Rate centres in NPA 939] [Dial plan for NPA 939]

NXX: 641

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
939-641 A Mayaguez PR BYMNPRCO0MD  8645 SUNCOM DBA T-MOBILE USA 820      
939-641 0 Mayaguez PR   8645 SUNCOM DBA T-MOBILE USA 820   2022-04-16   
939-641 1 Mayaguez PR   8645 SUNCOM DBA T-MOBILE USA 820   2022-04-16   
939-641 2 Mayaguez PR   8645 SUNCOM DBA T-MOBILE USA 820   2022-04-16   
939-641 3 Mayaguez PR   8645 SUNCOM DBA T-MOBILE USA 820   2022-04-16   
939-641 4 Mayaguez PR   8645 SUNCOM DBA T-MOBILE USA 820   2022-04-16   
939-641 5 Mayaguez PR   8645 SUNCOM DBA T-MOBILE USA 820   2022-04-16   
939-641 6 Mayaguez PR   8645 SUNCOM DBA T-MOBILE USA 820   2022-04-16   
939-641 9 Mayaguez PR   8645 SUNCOM DBA T-MOBILE USA 820   2022-04-16   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.