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: 573 [Rate centres in NPA 573] [Dial plan for NPA 573]

NXX: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-257 A Jefferson City MO JFCYMOXAX6Y  624H ONVOY SPECTRUM, LLC 521      
573-257 0 Jefferson City MO   5562 METROPCS, INC. 521      
573-257 1 Jefferson City MO JFCYMOXAEMD  6529 T-MOBILE USA, INC. 521      
573-257 2 Jefferson City MO JFCYMOXAXSX  073H TELNYX LLC 521   2020-08-01   
573-257 3 Jefferson City MO JFCYMOXAXZX  5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 521   2023-07-14   
573-257 4 Jefferson City MO JFCYMOXAXZX  5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 521   2023-07-14   
573-257 5 Jefferson City MO JFCYMOXAXZX  5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 521   2023-07-15   
573-257 7 Jefferson City MO JFCYMOXAXLX  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 521   2013-12-01   
573-257 8 Jefferson City MO JFCYMOXAX6Y  624H ONVOY SPECTRUM, LLC 521   2022-08-19   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.