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: 612K CSC VOICE, 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 74 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
573-978 5 Centertown MO   521   2024-05-12   
580-208 7 Idabel OK   536   2023-05-26   
580-297 A Enid OK ENIDOKMA7MD  536      
580-297 3 Enid OK   536   2013-12-29   
580-297 4 Enid OK   536   2013-12-29   
580-297 5 Enid OK   536   2013-12-29   
580-302 8 Weatherford OK   536   2014-03-02   
580-327 9 Alva OK   536   2014-06-13   
580-400 1 Lawton OK   536   2022-10-19   
580-412 0 Fairview OK   536   2024-03-31   
580-502 4 Wilson OK   536   2024-04-08   
580-540 4 Enid OK   536   2007-01-10   
580-540 8 Enid OK   536   2009-01-08   
580-540 9 Enid OK   536   2012-04-06   
580-572 5 Perry OK   536   2014-08-09   
580-650 2 Weatherford OK   536   2012-05-24   
580-804 4 Woodward OK   536   2022-03-10   
580-910 4 Healdton OK   536   2024-04-08   
580-969 4 Hugo OK   536   2024-04-13   
606-230 1 Allen KY   466   2014-03-01   
606-257 1 South Williamson KY   466   2014-03-01   
606-257 5 South Williamson KY   466   2007-01-10   
606-259 7 Allen KY   466   2009-02-04   
606-263 4 Prestonsburg KY   466   2007-01-10   
606-264 A Paintsville KY WNCHKYMAXLY  466      
606-264 4 Paintsville KY   466   2014-03-01   
606-264 5 Paintsville KY   466   2007-01-10   
606-313 2 Pikeville KY   466   2022-03-12   
606-333 1 Virgie KY   466   2022-09-18   
606-390 2 Warfield KY   466   2014-03-01   
606-390 5 Warfield KY   466   2007-01-10   
606-431 9 Elkhorn City KY   466   2022-03-12   
606-458 1 Grayson KY   466   2024-04-20   
606-506 A Prestonsburg KY WNCHKYMAXLY  466      
606-506 4 Prestonsburg KY   466   2013-12-28   
606-506 5 Prestonsburg KY   466   2013-12-28   
606-518 9 Fedscreek KY   466   2022-09-18   
606-519 A Stone KY WNCHKYMAXLY  466      
606-519 3 Stone KY   466   2014-03-01   
606-519 4 Stone KY   466   2007-01-10   
606-534 3 Inez KY   466   2014-03-01   
606-534 4 Inez KY   466   2014-03-01   
606-534 7 Inez KY   466   2007-01-10   
606-646 6 Meads KY   466   2024-03-04   
609-208 3 Allentown NJ CMDNNJCEXZY  222   2011-07-15   
609-223 0 Allentown NJ CMDNNJCEXZY  222   2004-07-11   
609-223 2 Allentown NJ CMDNNJCEXZY  222   2004-07-11   
609-228 3 Princeton NJ CMDNNJCEXZY  222   2004-07-11   
609-245 8 Mercerville NJ CMDNNJCEXZY  222   2011-10-13   
609-249 4 Mercerville NJ CMDNNJCEXZY  222   2013-05-04   

<< 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 74 >>

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.