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: 9748 AMERICAN MESSAGING SERVICES, LLC

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
313-705 A Detroit Zone 5 MI CMPTMIIFCM0  340      
313-709 A Detroit Zone 5 MI CMPTMIIFCM0  340      
313-714 A Detroit Zone 5 MI CMPTMIIFCM0  340      
313-754 A Detroit Zone 5 MI CMPTMIIFCM0  340      
313-781 A Detroit Zone 5 MI CMPTMIIFCM0  340      
313-793 A Detroit Zone 4 MI CMPTMIIFCM0  340      
313-795 A Detroit Zone 4 MI CMPTMIIFCM0  340      
313-796 A Detroit Zone 4 MI CMPTMIIFCM0  340      
313-803 A Detroit Zone 5 MI CMPTMIIFCM0  340      
313-813 A Detroit Zone 4 MI CMPTMIIFCM0  340      
313-814 A Detroit Zone 4 MI CMPTMIIFCM0  340      
313-840 A Detroit Zone 5 MI CMPTMIIFCM0  340      
313-851 A Detroit Zone 6 MI CMPTMIIFCM0  340      
313-990 A Detroit Zone 5 MI CMPTMIIFCM0  340      
314-294 A Ladue MO STLSMO05XKX  520      
314-360 A Ladue MO STLSMO05XKX  520      
314-407 A Ladue MO STLSMO05XKX  520      
314-419 A Ladue MO STLSMO05XKX  520      
314-424 A Ladue MO STLSMO05XKX  520      
314-483 A St Louis MO STLSMO05XKX  520      
314-490 A Ladue MO STLSMO05XKX  520      
314-491 A Ladue MO STLSMO05XKX  520      
314-508 A St Louis MO STLSMO05XKX  520      
314-509 A St Louis MO STLSMO05XKX  520      
314-510 A St Louis MO STLSMO05XKX  520      
314-559 A St Louis MO STLSMO05XKX  520      
314-663 A St Louis MO STLSMO05XKX  520      
314-670 A St Louis MO STLSMO05XKX  520      
314-672 A St Louis MO STLSMO05XKX  520      
314-734 A Ladue MO STLSMO05XKX  520      
314-790 A Ladue MO STLSMO05XKX  520      
314-836 A St Louis MO STLSMO05XKX  520      
314-840 A St Louis MO STLSMO05XKX  520      
314-841 A St Louis MO STLSMO05XKX  520      
314-871 A St Louis MO STLSMO05XKX  520      
315-490 A Syracuse NY SYRCNYSUXNY  136      
315-739 A Utica NY SYRCNYSUXNY  136      
316-466 A Wichita KS WCHTKSMR7MD  532      
316-579 A Wichita KS WCHTKSMR7MD  532      
317-235 A Indianapolis IN IPLCINGNCM0  336      
317-301 A Indianapolis IN IPLCINGNCM0  336      
317-302 A Indianapolis IN IPLCINGNCM0  336      
317-304 A Indianapolis IN IPLCINGNCM0  336      
317-305 A Indianapolis IN IPLCINGNCM0  336      
317-310 A Indianapolis IN IPLCINGNCM0  336      
317-312 A Indianapolis IN IPLCINGNCM0  336      
317-365 A Indianapolis IN IPLCINGNCM0  336      
317-367 A Indianapolis IN IPLCINGNCM0  336      
317-368 A Indianapolis IN IPLCINGNCM0  336      
317-404 A Indianapolis IN IPLCINGNCM0  336      

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Last updated: Tue, 04 May 2021 15:04:27 UTC

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