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.

OCN: 907K ALLO COMMUNICATIONS LLC

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
308-855 A Scottsbluff NE   646   2025-10-03   
308-855 5 Scottsbluff NE   646   2025-10-03   
308-910 A Grand Island NE   646      
308-910 5 Grand Island NE   646   2025-12-14   
417-585 A Joplin MO   522   2025-12-15   
417-585 5 Joplin MO   522   2025-12-15   
520-737 A Sierra Vista AZ   668      
520-737 5 Sierra Vista AZ   668   2024-08-16   
520-785 A Tucson AZ   668   2025-12-19   
520-785 5 Tucson AZ   668   2025-12-19   
531-795 A Lincoln NE   958   2025-10-03   
531-795 5 Lincoln NE   958   2025-10-03   
531-985 A Omaha NE   644   2025-10-03   
531-985 5 Omaha NE   644   2025-10-03   
623-307 A Phoenix AZ   666      
623-307 1 Phoenix AZ   666   2023-06-18   
623-955 A Phoenix AZ   666   2025-12-19   
623-955 5 Phoenix AZ   666   2025-12-19   
719-780 5 Pueblo-Main CO   658   2026-04-15   
719-975 A Colorado Springs-Main CO   658   2025-10-02   
719-975 5 Colorado Springs-Main CO   658   2025-10-02   
720-764 8 Hudson CO   656   2021-04-15   
720-967 8 Denver CO   656   2022-11-22   
913-985 A Kansas City KS   524   2025-12-25   
913-985 5 Kansas City KS   524   2025-12-25   
928-418 0 Kingman AZ   666   2023-09-25   
928-456 5 Flagstaff AZ   666   2023-11-24   
928-483 5 Yuma AZ   666   2023-08-31   
928-508 5 Yuma AZ   666   2025-05-26   
928-512 A Somerton AZ   666      
928-512 5 Somerton AZ   666   2023-11-24   
928-540 5 Lake Havasu City AZ   666   2025-05-26   
928-732 0 Lake Havasu City AZ   666   2023-08-28   
928-880 5 Kingman AZ   666   2025-06-30   
970-502 5 Greeley CO   656   2024-10-13   
970-503 A Greeley CO   656      
970-503 5 Greeley CO   656   2021-05-02   
970-604 5 Brush CO   656   2023-11-24   
970-743 A Fort Morgan CO   656      
970-743 3 Fort Morgan CO   656   2018-10-14   
970-771 4 Breckenridge CO   656   2019-06-24   
970-972 5 Eaton CO   656   2023-03-11   
983-955 A Denver CO   656   2025-10-24   
983-955 5 Denver CO   656   2025-10-24   

Last updated: Sat, 02 May 2026 12:20:53 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.