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Wisconsin NXX Codes
This Excel file tells what telephone exchange name is associated
with each area code plus NXX code, or first three digits of the
telephone number. Once downloaded, it may be sorted by exchange
name (community) to find all the codes assigned to each exchange.
The file also tells the company that each code is assigned to. However,
since customers may keep their number when changing companies, it
is not possible to associate a particular telephone number with
a particular company. This file will be updated periodically. The
data comes from the North American Number Plan Administrator and
may be accessed via its web site: www.nanpa.com For additional information,
contact Gary Evenson at: Gary.Evenson@psc.state.wi.us.
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