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: 361

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
939-361 A Mayaguez PR BYMNPRCO0MD  8645 SUNCOM DBA T-MOBILE USA 820      
939-361 0 Mayaguez PR BYMNPRCO0MD  8645 SUNCOM DBA T-MOBILE USA 820   2023-05-20   
939-361 1 Mayaguez PR BYMNPRCO0MD  8645 SUNCOM DBA T-MOBILE USA 820   2023-05-20   
939-361 2 Mayaguez PR BYMNPRCO0MD  8645 SUNCOM DBA T-MOBILE USA 820   2023-05-20   
939-361 3 Mayaguez PR BYMNPRCO4MD  624H ONVOY SPECTRUM, LLC 820   2023-12-05   
939-361 9 Mayaguez PR BYMNPRCO0MD  8645 SUNCOM DBA T-MOBILE USA 820   2023-05-20   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.