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.
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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
915-989 7 El Paso TX ELPSTXEY9MD  540   2025-06-21   
915-989 8 El Paso TX ELPSTXEY9MD  540   2025-06-21   
915-989 9 El Paso TX ELPSTXEY9MD  540   2025-06-21   
916-656 1 Pleasant Grove CA SCRMCA0105Z  726   2016-06-12   
916-656 2 Pleasant Grove CA SCRMCA0105Z  726   2016-06-12   
916-656 4 Pleasant Grove CA SCRMCA0105Z  726   2016-06-12   
916-656 5 Pleasant Grove CA SCRMCA0105Z  726   2016-06-12   
916-656 6 Pleasant Grove CA SCRMCA0105Z  726   2016-08-26   
916-656 8 Pleasant Grove CA SCRMCA0105Z  726   2016-08-26   
916-702 0 Pleasant Grove CA SCRMCA0105Z  726   2016-08-26   
916-702 2 Pleasant Grove CA SCRMCA0105Z  726   2016-08-26   
917-409 9 New York City Zone 01 NY NYCMNY37UMD  132   2026-01-11   
917-410 9 New York City Zone 01 NY NYCMNY37UMD  132   2026-01-11   
918-580 4 Bartlesville OK TULSOKTBXGZ  538   2026-04-09   
918-634 0 Tulsa OK TULSOKTBXGZ  538   2026-04-09   
918-796 4 Tulsa OK TULSOKTBXGZ  538   2025-12-01   
918-796 6 Tulsa OK TULSOKTBXGZ  538   2025-12-01   
918-796 7 Tulsa OK TULSOKTBXGZ  538   2025-12-01   
918-925 8 Tulsa OK TULSOKTBXGZ  538   2026-04-09   
920-384 A Green Bay WI GNBYWIELEMD  350      
920-384 9 Green Bay WI GNBYWIELEMD  350   2020-11-23   
920-466 A Green Bay WI GNBYWIELEMD  350   2025-09-08   
920-466 8 Green Bay WI GNBYWIELEMD  350   2025-09-08   
920-466 9 Green Bay WI GNBYWIELEMD  350   2025-09-08   
920-610 4 Green Bay WI   350   2026-08-09   
920-610 6 Green Bay WI   350   2026-08-09   
925-500 6 Martinez CA SNFCCA21XOZ  722   2016-06-06   
925-500 7 Martinez CA SNFCCA21XOZ  722   2016-06-06   
925-500 9 Martinez CA SNFCCA21XOZ  722   2016-06-06   
925-514 4 Martinez CA SNFCCA21XOZ  722   2026-05-25   
925-514 5 Martinez CA SNFCCA21XOZ  722   2026-05-25   
925-514 6 Martinez CA SNFCCA21XOZ  722   2026-05-25   
925-623 0 Pleasanton CA SNFCCA21XOZ  722   2016-10-20   
925-693 2 Clayton CA SNFCCA21XOZ  722   2016-10-20   
925-693 4 Clayton CA SNFCCA21XOZ  722   2016-10-20   
925-693 5 Clayton CA SNFCCA21XOZ  722   2016-10-20   
925-693 6 Clayton CA SNFCCA21XOZ  722   2016-10-20   
925-723 5 Martinez CA SNFCCA21XOZ  722   2016-06-06   
925-723 6 Martinez CA SNFCCA21XOZ  722   2016-06-06   
925-844 0 Clayton CA SNFCCA21XOZ  722   2016-10-20   
925-844 6 Clayton CA SNFCCA21XOZ  722   2016-10-20   
925-844 8 Clayton CA SNFCCA21XOZ  722   2016-10-20   
925-957 3 Martinez CA SNFCCA21XOZ  722   2013-04-05   
925-993 A Clayton CA SNFCCA21XOZ  722      
925-993 0 Clayton CA SNFCCA21XOZ  722   2016-10-20   
925-993 3 Clayton CA SNFCCA21XOZ  722   2016-10-20   
925-993 5 Clayton CA SNFCCA21XOZ  722   2016-10-20   
925-993 6 Clayton CA SNFCCA21XOZ  722   2016-10-20   
928-293 4 Kingman AZ PHNXAZMAXTY  666   2018-01-28   
928-293 6 Kingman AZ PHNXAZMAXTY  666   2018-01-28   

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

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