Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: LSANCARCY9X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
840-221 A San Bernardino CA 321J HD CARRIER LLC 730      
840-221 8 San Bernardino CA 321J HD CARRIER LLC 730   2022-12-22   
840-221 9 San Bernardino CA 321J HD CARRIER LLC 730   2022-12-22   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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