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: 1942 ROCK PORT TEL. CO.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
660-389 A South Hamburg MO RCPTMOXBRS0  524      
660-744 A Rock Port MO RCPTMOXADS0  524      
660-744 0 Rock Port MO RCPTMOXADS0  524      
660-744 1 Rock Port MO RCPTMOXADS0  524      
660-744 2 Rock Port MO RCPTMOXADS0  524      
660-744 5 Rock Port MO RCPTMOXADS0  524      
660-744 6 Rock Port MO RCPTMOXADS0  524      
660-744 8 Rock Port MO RCPTMOXADS0  524      
660-744 9 Rock Port MO RCPTMOXADS0  524      
660-993 A Watson MO WTSNMOXARS0  524      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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