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: 414 [Rate centres in NPA 414] [Dial plan for NPA 414]

NXX: 255

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
414-255 A Milwaukee Zone 1 WI MILXWI142MD  553B WINDSTREAM NORLIGHT, INC. - WI 356      
414-255 0 Milwaukee Zone 1 WI MILWWIDK6MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 356   2009-02-02   
414-255 1 Milwaukee Zone 1 WI MILXWI142MD  553B WINDSTREAM NORLIGHT, INC. - WI 356   2008-08-14   
414-255 2 Milwaukee Zone 1 WI MILWWIDK6MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 356   2009-06-25   
414-255 3 Milwaukee Zone 1 WI MILWWIDK6MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 356   2009-06-25   
414-255 4 Milwaukee Zone 1 WI MILXWIILCMD  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356   2009-10-19   
414-255 5 Milwaukee Zone 1 WI MILXWIILCMD  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356   2009-10-19   
414-255 6 Milwaukee Zone 1 WI MILXWIILCMD  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356   2009-10-19   
414-255 7 Milwaukee Zone 1 WI MILWWI13X4X  369E YMAX COMMUNICATIONS CORP. - WI 356   2009-01-19   
414-255 8 Milwaukee Zone 1 WI MILWWI13X4X  369E YMAX COMMUNICATIONS CORP. - WI 356   2009-01-19   
414-255 9 Milwaukee Zone 1 WI MILWWI13X4X  369E YMAX COMMUNICATIONS CORP. - WI 356   2009-01-19   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.