Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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OCN: 321J HD CARRIER LLC

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
857-755 7 Quincy MA CMBRMABEQMD  128   2026-07-17   
857-799 A Cambridge MA CMBRMABEQMD  128      
857-799 9 Cambridge MA CMBRMABEQMD  128   2018-12-29   
857-990 7 Boston MA CMBRMABEQMD  128   2016-02-19   
857-997 A Somerville MA CMBRMABEQMD  128      
857-997 1 Somerville MA CMBRMABEQMD  128   2016-09-03   
857-997 5 Somerville MA CMBRMABEQMD  128   2016-04-11   
857-997 6 Somerville MA CMBRMABEQMD  128   2016-04-11   
857-997 7 Somerville MA CMBRMABEQMD  128   2016-04-11   
858-250 4 La Jolla CA SNDGCA0261Z  732   2016-10-20   
858-250 5 La Jolla CA SNDGCA0261Z  732   2016-10-20   
858-250 6 La Jolla CA SNDGCA0261Z  732   2016-10-20   
858-250 7 La Jolla CA SNDGCA0261Z  732   2016-10-20   
858-250 8 La Jolla CA SNDGCA0261Z  732   2016-10-20   
858-276 2 San Diego: Linda Vista DA CA SNDGCA0261Z  732   2016-06-09   
858-276 3 San Diego: Linda Vista DA CA SNDGCA0261Z  732   2016-06-09   
858-276 4 San Diego: Linda Vista DA CA SNDGCA0261Z  732   2016-06-09   
858-276 5 San Diego: Linda Vista DA CA SNDGCA0261Z  732   2016-06-09   
858-276 6 San Diego: Linda Vista DA CA SNDGCA0261Z  732   2016-06-09   
858-351 A San Diego: San Diego DA CA SNDGCA0275Z  732      
858-351 8 San Diego: San Diego DA CA SNDGCA0275Z  732   2022-12-11   
858-351 9 San Diego: San Diego DA CA SNDGCA0275Z  732   2022-12-11   
858-443 3 Chula Vista CA SNDGCA0261Z  732   2026-06-07   
858-443 6 Chula Vista CA SNDGCA0261Z  732   2026-06-30   
858-443 7 Chula Vista CA SNDGCA0261Z  732   2026-06-30   
858-443 8 Chula Vista CA SNDGCA0261Z  732   2026-06-30   
858-600 5 San Diego: San Diego DA CA SNDGCA0261Z  732   2026-05-15   
858-600 6 San Diego: San Diego DA CA SNDGCA0261Z  732   2026-05-15   
858-600 7 San Diego: San Diego DA CA SNDGCA0261Z  732   2026-05-15   
858-600 8 San Diego: San Diego DA CA SNDGCA0261Z  732   2026-05-15   
858-868 A San Diego: San Diego DA CA SNDGCA0261Z  732      
858-868 9 San Diego: San Diego DA CA SNDGCA0261Z  732   2019-02-09   
859-452 3 Richmond KY LXTNKYXA18Z  466   2026-03-23   
859-452 4 Richmond KY LXTNKYXA18Z  466   2026-03-23   
859-452 5 Richmond KY LXTNKYXA18Z  466   2026-03-23   
859-818 8 Boone KY CNCNOHWSXAZ  922   2019-01-10   
859-849 A Lexington KY LXTNKYXA18Z  466   2026-02-08   
859-849 6 Lexington KY LXTNKYXA18Z  466   2026-02-08   
859-849 7 Lexington KY LXTNKYXA18Z  466   2026-02-08   
859-849 8 Lexington KY LXTNKYXA18Z  466   2026-02-08   
859-849 9 Lexington KY LXTNKYXA18Z  466   2026-02-08   
862-208 7 Nutley NJ NWRKNJ0298Z  224   2016-05-19   
862-212 4 Orange NJ NWRKNJ0298Z  224   2016-05-19   
862-212 5 Orange NJ NWRKNJ0298Z  224   2016-05-19   
862-212 6 Orange NJ NWRKNJ0298Z  224   2016-05-19   
862-212 7 Orange NJ NWRKNJ0298Z  224   2016-05-19   
862-299 5 Hopatcong NJ NWRKNJ0298Z  224   2020-05-09   
862-299 7 Hopatcong NJ NWRKNJ0298Z  224   2020-05-09   
862-321 3 Orange NJ NWRKNJ0298Z  224   2016-05-19   
862-321 4 Orange NJ NWRKNJ0298Z  224   2016-05-19   

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Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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