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: CHCGILWBXSZ

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
219-338 3 Cedar Lake IN 478J NUSO, LLC 358      
219-338 4 Cedar Lake IN 478J NUSO, LLC 358      
219-587 0 Cedar Lake IN 478J NUSO, LLC 358      
262-222 9 North Antioch WI 478J NUSO, LLC 358      
262-272 A North Antioch WI 478J NUSO, LLC 358      
262-272 1 North Antioch WI 478J NUSO, LLC 358      
262-435 1 North Antioch WI 478J NUSO, LLC 358      
312-682 A Chicago Zone 01-Calumet IL 478J NUSO, LLC 358      
312-682 1 Chicago Zone 01-Calumet IL 478J NUSO, LLC 358      
312-682 6 Chicago Zone 01-Calumet IL 478J NUSO, LLC 358      
312-682 7 Chicago Zone 01-Calumet IL 478J NUSO, LLC 358      
331-271 8 Hinsdale IL 478J NUSO, LLC 358      
331-271 9 Hinsdale IL 478J NUSO, LLC 358      
331-289 1 Hinsdale IL 478J NUSO, LLC 358      
872-275 5 Chicago Zone 01-Calumet IL 478J NUSO, LLC 358      

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

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