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.

Switch: STLSMO40RPA

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
314-830 A Ladue MO 9533 SOUTHWESTERN BELL 520      
314-830 0 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-830 1 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-830 2 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-830 3 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-830 4 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-830 5 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-830 6 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-830 7 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-830 9 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-831 A Ladue MO 9533 SOUTHWESTERN BELL 520      
314-837 A Ladue MO 9533 SOUTHWESTERN BELL 520      
314-838 A Ladue MO 9533 SOUTHWESTERN BELL 520      
314-839 A Ladue MO 9533 SOUTHWESTERN BELL 520      
314-921 A Ladue MO 9533 SOUTHWESTERN BELL 520      
314-972 A Ladue MO 9533 SOUTHWESTERN BELL 520      
314-972 0 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-972 1 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-972 5 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-972 6 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-972 7 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-972 8 Ladue MO 9533 SOUTHWESTERN BELL 520      
314-972 9 Ladue MO 9533 SOUTHWESTERN BELL 520      

Last updated: Sat, 02 May 2026 12:20:53 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.