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.

NPA: 331 [Rate centres in NPA 331] [Dial plan for NPA 331]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-247 A Naperville IL   197D VONAGE NETWORK INC. 358   2019-01-12   
331-247 0 Naperville IL   197D VONAGE NETWORK INC. 358   2019-01-12   
331-247 1 Naperville IL   197D VONAGE NETWORK INC. 358   2019-01-12   
331-247 2 Naperville IL   197D VONAGE NETWORK INC. 358   2019-01-12   
331-247 3 Naperville IL   197D VONAGE NETWORK INC. 358   2019-01-12   
331-247 4 Naperville IL   197D VONAGE NETWORK INC. 358   2019-01-12   
331-247 5 Naperville IL   197D VONAGE NETWORK INC. 358   2019-01-12   
331-247 6 Naperville IL   197D VONAGE NETWORK INC. 358   2019-01-12   
331-247 7 Naperville IL   197D VONAGE NETWORK INC. 358   2019-01-12   
331-247 8 Naperville IL   197D VONAGE NETWORK INC. 358   2019-01-12   
331-247 9 Naperville IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-01-18   

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.