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: 618 [Rate centres in NPA 618] [Dial plan for NPA 618]

NXX: 903

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-903 A Dorchester IL STLSMOGZ00Z  490J DISH WIRELESS, LLC 520      
618-903 0 Dorchester IL STLSMO05XMX  624H ONVOY SPECTRUM, LLC 520   2025-01-04   
618-903 9 Dorchester IL STLSMOGZ00Z  490J DISH WIRELESS, LLC 520   2023-02-05   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.