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: 557 [Rate centres in NPA 557] [Dial plan for NPA 557]

NXX: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
557-203 A Mehlville MO STLVMOOH3MD  5562 METROPCS, INC. 520      
557-203 0 Mehlville MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
557-203 1 Mehlville MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
557-203 2 Mehlville MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
557-203 3 Mehlville MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
557-203 4 Mehlville MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
557-203 5 Mehlville MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
557-203 6 Mehlville MO NWTPMOABGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520      
557-203 8 Mehlville MO STLVMOOH3MD  5562 METROPCS, INC. 520      
557-203 9 Mehlville MO STLVMOOH3MD  5562 METROPCS, INC. 520      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.