Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

OCN: 321J HD CARRIER LLC

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
412-410 9 Pittsburgh Zone 1 PA   234   2016-05-20   
412-662 1 Pittsburgh Suburban Zone 22 PA PITBPADTXHX  234   2016-05-20   
412-662 2 Pittsburgh Suburban Zone 22 PA PITBPADTXHX  234   2016-05-20   
412-662 3 Pittsburgh Suburban Zone 22 PA PITBPADTXHX  234   2016-05-20   
412-662 4 Pittsburgh Suburban Zone 22 PA PITBPADTXHX  234   2016-05-20   
412-662 5 Pittsburgh Suburban Zone 22 PA PITBPADTXHX  234   2016-05-20   
412-662 6 Pittsburgh Suburban Zone 22 PA PITBPADTXHX  234   2016-05-20   
412-662 7 Pittsburgh Suburban Zone 22 PA   234   2016-05-20   
412-662 8 Pittsburgh Suburban Zone 22 PA   234   2016-05-20   
412-844 A Pittsburgh Zone 8 PA PITBPADTXHX  234      
412-844 9 Pittsburgh Zone 8 PA PITBPADTXHX  234   2019-05-16   
413-288 A Springfield MA SPFDMAOI9MD  126      
413-288 8 Springfield MA SPFDMAOI9MD  126   2023-05-11   
413-288 9 Springfield MA SPFDMAOI9MD  126   2023-05-11   
413-421 2 Holyoke MA   126   2025-11-28   
413-421 3 Holyoke MA   126   2025-11-28   
413-421 4 Holyoke MA   126   2025-11-28   
413-524 A Springfield MA   126   2025-11-22   
413-524 3 Springfield MA   126   2025-11-22   
413-524 4 Springfield MA   126   2025-11-22   
413-601 1 Pittsfield MA   126   2025-11-28   
413-601 2 Pittsfield MA   126   2025-11-28   
413-601 3 Pittsfield MA   126   2025-11-28   
414-261 A Milwaukee Zone 1 WI MILWWIAU07Z  356      
414-261 9 Milwaukee Zone 1 WI MILWWIAU07Z  356   2020-11-23   
414-300 4 Milwaukee Zone 1 WI   356   2025-08-10   
414-300 5 Milwaukee Zone 1 WI   356   2025-08-10   
415-909 1 San Francisco: Juniper DA CA SNFCCA21XOZ  722   2016-06-09   
415-909 2 San Francisco: Juniper DA CA SNFCCA21XOZ  722   2016-06-09   
415-909 6 San Francisco: Juniper DA CA SNFCCA21XOZ  722   2016-06-28   
417-604 A Springfield MO SPFDMOMCXVX  522      
417-604 8 Springfield MO SPFDMOMCXVX  522   2023-05-11   
417-604 9 Springfield MO SPFDMOMCXVX  522   2023-05-11   
417-618 6 Springfield MO   522   2025-11-14   
417-618 7 Springfield MO   522   2025-11-14   
423-993 A Chattanooga TN   472   2026-01-22   
423-993 6 Chattanooga TN   472   2026-01-22   
423-993 7 Chattanooga TN   472   2026-01-22   
423-993 8 Chattanooga TN   472   2026-01-22   
423-993 9 Chattanooga TN   472   2026-01-22   
423-995 A Johnson City TN   956   2026-01-22   
423-995 6 Johnson City TN   956   2026-01-22   
423-995 7 Johnson City TN   956   2026-01-22   
423-995 8 Johnson City TN   956   2026-01-22   
423-995 9 Johnson City TN   956   2026-01-22   
424-304 3 Redondo CA LSANCARCY1X  730   2016-06-02   
424-304 5 Redondo CA LSANCARCY1X  730   2016-06-02   
424-304 6 Redondo CA LSANCARCY1X  730   2016-06-02   
424-304 7 Redondo CA LSANCARCY1X  730   2016-06-02   
424-304 8 Redondo CA LSANCARCY1X  730   2016-06-02   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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