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: FAMTMNXFDS0

Remotes:

Switch Switch name Switch type
CYLNMNXCRS6  CEYLON  RLC 
ECHNMNXERS7  EAST CHAIN  RLC 
LWVLMNXLRS4  LEWISVILLE  RLC 
NROPMNXNRS4  NORTHROP  RLC 
SHBNMNXSRS7  SHERBURN  RLC 
TRMNMNXTRS7  TRUMAN  RLC 
TRMTMNXTRS0  TRIMONT  RSC 
WLCMMNXWRS7  WELCOME  RLC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
507-235 A Fairmont MN 1367 FRONTIER COMMUNICATIONS OF MINNESOTA, INC. 620      

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

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