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: CLLKSDXADS0

Remotes:

Switch Switch name Switch type
ASTRSDXARS1  ASTORIA  RSC 
BRNTSDXARS2  BRANDT  RSC 
CSWDSDXARS1  CASTLEWOOD  AXR 
EKTNSDXARS3  ELKTON  RSC 
GDWNSDXARS4  GOODWIN  RSC 
HNDRMNXHRS2  HENDRICKS  DMT 
STKHSDXARS0  STOCKHOLM  GB2 
TOROSDXARS5  TORONTO  RSC 
WHTESDXARS6  WHITE  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
507-277 A East Gary MN 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
507-548 A East Elkton MN 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-272 A Gary SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-542 A Elkton SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-623 A Revillo SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-629 A White SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-676 A Stockholm SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-756 A South Shore SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-793 A Castlewood SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-794 A Toronto SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-795 A Goodwin SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-832 A Astoria SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-874 A Clear Lake SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-876 A Brandt SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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