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.
  • 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

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
314-278 1 Kirkwood MO STLSMOGZJMD  520   2026-02-23   
314-278 2 Kirkwood MO STLSMOGZJMD  520   2026-02-23   
314-292 1 Ladue MO   520   2026-09-21   
314-383 9 St Louis MO   520   2026-08-31   
314-600 9 St Louis MO   520   2026-08-31   
314-723 8 St Louis MO   520   2026-08-31   
314-769 8 St Louis MO   520   2026-08-31   
314-806 A St Louis MO STLSMOGZJMD  520      
314-806 9 St Louis MO STLSMOGZJMD  520   2020-11-21   
315-484 1 Syracuse NY SYRCNY020MD  136   2026-01-18   
315-885 2 Syracuse NY SYRCNY020MD  136   2026-02-09   
316-368 A Wichita KS WCHTKSTPWMD  532      
316-368 9 Wichita KS WCHTKSTPWMD  532   2020-09-25   
317-348 7 Fishers IN   336   2026-10-10   
317-794 9 Indianapolis IN IPLWIN75X0X  336   2026-05-21   
318-454 3 Shreveport LA SHPTLAMA30Z  486   2026-06-27   
318-454 4 Shreveport LA SHPTLAMA30Z  486   2026-06-27   
318-454 5 Shreveport LA SHPTLAMA30Z  486   2026-06-27   
318-454 6 Shreveport LA SHPTLAMA30Z  486   2026-06-27   
318-522 A Shreveport LA SHPTLAMA30Z  486      
318-522 8 Shreveport LA SHPTLAMA30Z  486   2023-05-11   
318-522 9 Shreveport LA SHPTLAMA30Z  486   2023-05-11   
318-735 7 Shreveport LA SHPTLAMA30Z  486   2025-08-15   
318-735 8 Shreveport LA SHPTLAMA30Z  486   2025-08-15   
319-379 A Iowa City IA IWCYIA708MD  635      
319-379 8 Iowa City IA IWCYIA708MD  635   2020-11-20   
319-379 9 Iowa City IA IWCYIA708MD  635   2020-11-20   
320-472 A St Cloud MN STCDMNTOXMY  626      
320-472 8 St Cloud MN STCDMNTOXMY  626   2023-05-11   
320-472 9 St Cloud MN STCDMNTOXMY  626   2023-05-11   
323-504 7 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-08-18   
323-504 8 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-08-18   
323-504 9 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-08-18   
323-701 3 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-06-02   
323-701 4 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-06-02   
323-701 5 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-06-02   
323-701 6 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-06-02   
323-701 7 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-06-02   
323-701 8 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-08-18   
323-701 9 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-08-18   
323-897 2 Los Angeles: DA 08 CA LSANCARCY1X  730   2016-06-02   
323-897 3 Los Angeles: DA 08 CA LSANCARCY1X  730   2016-06-02   
323-897 4 Los Angeles: DA 08 CA LSANCARCY1X  730   2016-06-02   
323-946 0 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-08-18   
323-946 4 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-08-18   
323-946 5 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-08-18   
323-946 8 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-08-18   
323-946 9 Los Angeles: DA 14 CA LSANCARCY1X  730   2016-08-18   
324-587 3 Jacksonville FL JCVLFLCLY2X  45204   2026-05-18   
324-587 4 Jacksonville FL JCVLFLCLY2X  45204   2026-05-18   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 >>

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.