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
631-633 3 Bellport NY NYCMNY37UMD  132   2014-08-01   
631-637 7 Brentwood NY NYCMNY37UMD  132   2014-08-01   
631-652 2 Smithtown NY NYCMNY37UMD  132   2014-08-01   
631-659 6 Cold Spring Harbor NY NYCMNY37UMD  132   2016-08-22   
631-659 7 Cold Spring Harbor NY NYCMNY37UMD  132   2016-08-22   
631-659 9 Cold Spring Harbor NY NYCMNY37UMD  132   2016-08-22   
631-674 5 Midland NY NYCMNY37UMD  132   2014-08-01   
631-743 3 Port Jefferson NY NYCMNY37UMD  132   2014-08-01   
631-763 0 Cold Spring Harbor NY NYCMNY37UMD  132   2016-08-22   
631-800 5 Southampton NY NYCMNY37UMD  132   2014-08-01   
631-832 2 Bayport NY   132   2014-08-01   
631-837 7 Northport NY   132   2014-08-01   
631-856 6 Hampton Bays NY NYCMNY37UMD  132   2014-08-01   
631-857 8 Cold Spring Harbor NY NYCMNY37UMD  132   2014-08-01   
631-858 4 West Commack NY NYCMNY37UMD  132   2014-08-01   
631-881 1 Central Islip NY NYCMNY37UMD  132   2014-08-01   
631-888 7 Lindenhurst NY   132   2014-08-01   
631-931 1 East Hampton NY   132   2016-07-23   
631-960 9 Islip NY NYCMNY37UMD  132   2014-08-01   
631-973 9 Kings Park NY NYCMNY37UMD  132   2014-08-01   
631-992 9 Deer Park NY NYCMNY37UMD  132   2014-08-01   
636-347 A De Soto MO STLSMOGZKMD  520      
636-347 9 De Soto MO STLSMOGZKMD  520   2021-07-05   
636-407 6 De Soto MO   520   2025-11-14   
636-407 7 De Soto MO   520   2025-11-14   
640-280 2 Pleasantville NJ   220   2025-12-08   
640-280 3 Pleasantville NJ   220   2025-12-08   
640-280 4 Pleasantville NJ   220   2025-12-08   
640-280 5 Pleasantville NJ   220   2025-12-08   
640-280 6 Pleasantville NJ   220   2025-12-08   
640-288 5 Trenton NJ   222   2025-12-11   
640-288 6 Trenton NJ   222   2025-12-11   
640-288 7 Trenton NJ   222   2025-12-11   
640-288 8 Trenton NJ   222   2025-12-11   
640-292 2 Atlantic City NJ   220   2026-01-19   
640-292 3 Atlantic City NJ   220   2026-01-19   
640-292 4 Atlantic City NJ   220   2026-01-19   
641-461 A Charles City IA RUDDIA012MD  632      
641-461 9 Charles City IA RUDDIA012MD  632   2019-10-20   
645-222 0 Miami FL   46017   2024-01-04   
645-222 3 Miami FL   46017   2024-01-04   
645-222 4 Miami FL   46017   2024-01-04   
645-222 5 Miami FL   46017   2024-01-04   
645-222 6 Miami FL   46017   2024-01-04   
645-222 7 Miami FL   46017   2024-01-04   
645-222 8 Miami FL   46017   2024-01-04   
645-222 9 Miami FL   46017   2024-01-04   
645-233 4 Miami FL   46017   2026-01-04   
645-233 5 Miami FL   46017   2026-01-04   
645-233 6 Miami FL   46017   2026-01-04   

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

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