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: ASPECOMADS0

Remotes:

Switch Switch name Switch type
SNMSCOMARS1  SNOWMASS  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
970-205 A Aspen CO 9636 QWEST CORPORATION 656      
970-205 0 Aspen CO 9636 QWEST CORPORATION 656      
970-205 1 Aspen CO 9636 QWEST CORPORATION 656      
970-205 2 Aspen CO 9636 QWEST CORPORATION 656      
970-205 3 Aspen CO 9636 QWEST CORPORATION 656      
970-205 4 Aspen CO 9636 QWEST CORPORATION 656      
970-205 5 Aspen CO 9636 QWEST CORPORATION 656      
970-205 6 Aspen CO 9636 QWEST CORPORATION 656      
970-205 7 Aspen CO 9636 QWEST CORPORATION 656      
970-205 8 Aspen CO 9636 QWEST CORPORATION 656      
970-300 7 Aspen CO 9636 QWEST CORPORATION 656   2004-05-17   
970-429 A Aspen CO 9636 QWEST CORPORATION 656      
970-429 0 Aspen CO 9636 QWEST CORPORATION 656      
970-429 1 Aspen CO 9636 QWEST CORPORATION 656      
970-429 2 Aspen CO 9636 QWEST CORPORATION 656      
970-429 3 Aspen CO 9636 QWEST CORPORATION 656      
970-429 6 Aspen CO 9636 QWEST CORPORATION 656      
970-429 7 Aspen CO 9636 QWEST CORPORATION 656      
970-429 9 Aspen CO 9636 QWEST CORPORATION 656      
970-544 A Aspen CO 9636 QWEST CORPORATION 656      
970-920 A Aspen CO 9636 QWEST CORPORATION 656      
970-925 A Aspen CO 9636 QWEST CORPORATION 656      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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