Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 939 [Rate centres in NPA 939] [Dial plan for NPA 939]

NXX: 478

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
939-478 A Cayey PR PBVJPRCO0MD  8645 SUNCOM DBA T-MOBILE USA 820      
939-478 0 Cayey PR   8645 SUNCOM DBA T-MOBILE USA 820   2018-06-15   
939-478 1 Cayey PR   8645 SUNCOM DBA T-MOBILE USA 820   2018-06-15   
939-478 2 Cayey PR   559F NEUTRAL TANDEM - PR 820   2021-07-31   
939-478 3 Cayey PR   559F NEUTRAL TANDEM - PR 820   2021-07-31   
939-478 4 Cayey PR   8645 SUNCOM DBA T-MOBILE USA 820   2021-09-18   
939-478 5 Cayey PR   8645 SUNCOM DBA T-MOBILE USA 820   2021-09-18   
939-478 6 Cayey PR   8645 SUNCOM DBA T-MOBILE USA 820   2021-09-18   
939-478 7 Cayey PR   8645 SUNCOM DBA T-MOBILE USA 820   2021-09-18   
939-478 8 Cayey PR   8645 SUNCOM DBA T-MOBILE USA 820   2021-09-18   
939-478 9 Cayey PR   8645 SUNCOM DBA T-MOBILE USA 820   2018-06-15   

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

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