Effective Dates for Prefixes in Area Code 414

Effective Dates for Prefixes

Search in Area Code 414
WISCONSIN
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We only have date information for U.S. prefixes effective starting in 2001. No information is available for prefixes before 2001 or other countries..

You can only look up ONE area code/prefix at a time and only by typing in a three number prefix. Typing in anything else will just give you an "error message" as the program will not be able to find anything but ONE prefix in this specific area code.

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