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: 574 [Rate centres in NPA 574] [Dial plan for NPA 574]

NXX: 521

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
574-521 A Syracuse IN PLMOINXAQMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 332      
574-521 0 Syracuse IN PLMOINXAQMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 332      
574-521 1 Syracuse IN SBNDIN05NMD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 332   2022-01-03   
574-521 2 Syracuse IN SBNDIN05NMD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 332   2022-01-03   
574-521 3 Syracuse IN SBNDIN053MD  4803 LEVEL 3 COMMUNICATIONS, LLC - IN 332   2018-12-28   
574-521 4 Syracuse IN SBNDIN05NMD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 332   2022-01-03   
574-521 5 Syracuse IN SBNDIN05NMD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 332   2022-01-03   
574-521 6 Syracuse IN SBNDIN05NMD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 332   2022-01-03   
574-521 7 Syracuse IN SBNDIN05NMD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 332   2022-01-03   
574-521 9 Syracuse IN SBNDIN13NMD  490J BOOST SUBSCRIBERCO L.L.C. 332   2023-11-18   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.