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.

Switch: KSCYMO24DS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
816-313 A Kansas City MO 9533 SOUTHWESTERN BELL 524      
816-353 A Kansas City MO 9533 SOUTHWESTERN BELL 524      
816-356 A Kansas City MO 9533 SOUTHWESTERN BELL 524      
816-358 A Kansas City MO 9533 SOUTHWESTERN BELL 524      
816-737 A Kansas City MO 9533 SOUTHWESTERN BELL 524      
816-743 A Kansas City MO 9533 SOUTHWESTERN BELL 524      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.