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
225-512 8 Baton Rouge LA BTRGLA12XQZ  492   2023-05-11   
225-512 9 Baton Rouge LA BTRGLA12XQZ  492   2023-05-11   
225-935 6 Baton Rouge LA   492   2025-08-15   
227-222 7 Washington Zone 16 MD WASHDCSWNMD  236   2023-12-18   
227-244 A Ridge MD   236      
227-244 6 Ridge MD   236   2024-07-27   
227-295 5 Hagerstown MD   240   2026-01-26   
227-295 6 Hagerstown MD   240   2026-01-26   
227-295 7 Hagerstown MD   240   2026-01-26   
227-303 3 Washington Zone 10 MD   236   2026-01-18   
227-777 1 Ashton (Baltimore LATA) MD BLTMMDCHXVX  238   2023-09-30   
227-888 7 Washington Zone 15 (Baltimore LATA) MD BLTMMDCHXVX  238   2023-11-20   
227-999 7 Washington Zone 10 MD WASHDCSWNMD  236   2023-12-15   
228-279 2 Gulfport MS   484   2026-02-14   
228-279 3 Gulfport MS   484   2026-02-14   
228-279 4 Gulfport MS   484   2026-02-14   
228-338 A Biloxi MS BILXMSAT8MD  484      
228-338 8 Biloxi MS BILXMSAT8MD  484   2020-07-19   
228-338 9 Biloxi MS BILXMSAT8MD  484   2020-07-19   
231-293 A Frankfort MI BRSPMI099MD  348      
231-293 9 Frankfort MI BRSPMI099MD  348   2021-07-05   
231-442 5 Harrietta MI   348   2025-11-03   
234-279 A Akron OH AKRNOH2533Z  325      
234-279 8 Akron OH AKRNOH2533Z  325   2020-09-25   
234-279 9 Akron OH AKRNOH2533Z  325   2020-09-25   
234-370 A Youngstown OH YNTWOH74X4X  322      
234-370 8 Youngstown OH YNTWOH74X4X  322   2023-05-11   
234-370 9 Youngstown OH YNTWOH74X4X  322   2023-05-11   
234-451 3 Warren OH   322   2026-02-20   
234-451 4 Warren OH   322   2026-02-20   
235-204 A Columbia MO   521   2026-02-08   
235-204 2 Columbia MO   521   2026-02-08   
235-204 3 Columbia MO   521   2026-02-08   
235-204 5 Columbia MO   521   2026-02-08   
235-204 9 Columbia MO   521   2026-02-08   
239-328 A Fort Myers FL FTMYFL027MD  93902      
239-328 8 Fort Myers FL FTMYFL027MD  93902   2020-09-14   
239-328 9 Fort Myers FL FTMYFL027MD  93902   2020-09-14   
239-523 2 Fort Myers FL   93902   2026-01-05   
239-523 3 Fort Myers FL   93902   2026-01-05   
239-523 4 Fort Myers FL   93902   2026-01-05   
240-570 0 Ashton (Baltimore LATA) MD BLTMMDCHXVX  238   2016-05-14   
240-570 1 Ashton (Baltimore LATA) MD BLTMMDCHXVX  238   2016-05-14   
240-570 2 Ashton (Baltimore LATA) MD BLTMMDCHXVX  238   2016-05-14   
240-570 3 Ashton (Baltimore LATA) MD BLTMMDCHXVX  238   2016-05-14   
240-570 4 Ashton (Baltimore LATA) MD BLTMMDCHXVX  238   2016-05-14   
240-570 5 Ashton (Baltimore LATA) MD BLTMMDCHXVX  238   2016-05-14   
240-570 6 Ashton (Baltimore LATA) MD BLTMMDCHXVX  238   2016-05-14   
240-570 9 Ashton (Baltimore LATA) MD   238   2016-05-14   
240-730 A Hagerstown MD HGTWMD53DMD  240      

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

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