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: 339 [Rate centres in NPA 339] [Dial plan for NPA 339]

NXX: 339

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
339-339 A Waltham MA   125L MASS MOBILE LLC 128   2025-04-29   
339-339 0 Waltham MA   125L MASS MOBILE LLC 128   2025-04-29   
339-339 1 Waltham MA   125L MASS MOBILE LLC 128   2025-04-29   
339-339 2 Waltham MA   125L MASS MOBILE LLC 128   2025-04-29   
339-339 3 Waltham MA   125L MASS MOBILE LLC 128   2025-04-29   
339-339 4 Waltham MA   125L MASS MOBILE LLC 128   2025-04-29   
339-339 5 Waltham MA   125L MASS MOBILE LLC 128   2025-04-29   
339-339 6 Waltham MA   125L MASS MOBILE LLC 128   2025-04-29   
339-339 7 Waltham MA   125L MASS MOBILE LLC 128   2025-04-29   
339-339 8 Waltham MA   125L MASS MOBILE LLC 128   2025-04-29   
339-339 9 Waltham MA   125L MASS MOBILE LLC 128   2025-04-29   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.