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: 409 [Rate centres in NPA 409] [Dial plan for NPA 409]

NXX: 983

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
409-983 A Port Arthur TX PTARTXYUDS0  9533 SOUTHWESTERN BELL 562      
409-983 0 Port Arthur TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 562   2008-10-18   
409-983 1 Port Arthur TX   9533 SOUTHWESTERN BELL 562      
409-983 2 Port Arthur TX   9533 SOUTHWESTERN BELL 562      
409-983 3 Port Arthur TX   9533 SOUTHWESTERN BELL 562      
409-983 4 Port Arthur TX   9533 SOUTHWESTERN BELL 562      
409-983 5 Port Arthur TX   9533 SOUTHWESTERN BELL 562      
409-983 6 Port Arthur TX   9533 SOUTHWESTERN BELL 562      
409-983 7 Port Arthur TX   9533 SOUTHWESTERN BELL 562      
409-983 8 Port Arthur TX   9533 SOUTHWESTERN BELL 562      
409-983 9 Port Arthur TX   939H COMMIO, LLC 562   2024-01-19   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.