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: 484 [Rate centres in NPA 484] [Dial plan for NPA 484]

NXX: 521

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
484-521 A Philadelphia Suburban Zone 17 PA KGPRPADODS0  7434 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 228      
484-521 0 Philadelphia Suburban Zone 17 PA PHLAPAFGXCX  073H TELNYX LLC 228   2017-06-21   
484-521 1 Philadelphia Suburban Zone 17 PA PHLAPAMKGMD  551G NUSO, LLC 228   2018-11-07   
484-521 2 Philadelphia Suburban Zone 17 PA PHLAPAMK20Z  002F BANDWIDTH.COM CLEC, LLC - PA 228   2013-02-22   
484-521 3 Philadelphia Suburban Zone 17 PA PHLAPAFGD4S  967E PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 228   2013-04-28   
484-521 4 Philadelphia Suburban Zone 17 PA WNRTPAAHCMA  5562 METROPCS, INC. 228   2019-01-16   
484-521 5 Philadelphia Suburban Zone 17 PA   515J IP HORIZON LLC 228   2013-08-29   
484-521 6 Philadelphia Suburban Zone 17 PA WNRTPAAHCMA  6626 OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 228   2019-04-05   
484-521 7 Philadelphia Suburban Zone 17 PA PHLAPAFGD2S  547E ONVOY, LLC - PA 228   2019-12-09   
484-521 8 Philadelphia Suburban Zone 17 PA PHLAPAFGD4S  967E PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 228   2013-04-28   
484-521 9 Philadelphia Suburban Zone 17 PA PHLAPAMKGMD  551G NUSO, LLC 228   2018-11-07   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.