Prefix 414-251 — Milwaukee Zone 1, WI

NANPA CO code assignment, current as of July 28, 2026.

Area code
414
Prefix (NXX)
251
Rate center
Milwaukee Zone 1
State
Wisconsin
Time zone
Central
Code holder
TELEPORT COMMUNICATIONS AMERICA, LLC WI
OCN
7216
Pooled
Yes (thousands-block pooling)
Assigned
2020-03-09
LATA
356

A phone number starting 414-251 was issued in the Milwaukee Zone 1 rate center of WI — part of area code 414.

The assigned code holder is TELEPORT COMMUNICATIONS AMERICA, LLC WI, operating company number 7216, assigned March 9, 2020. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

A scammer can display 414-251 without ever touching WI. When in doubt, end the call and reach the company or agency through its official website; unwanted robocalls belong in the FTC's fraud report queue.

Milwaukee Zone 1 is part of the Milwaukee-Waukesha, WI Metropolitan Statistical Area. For routing purposes it sits in LATA 356. Numbers here keep Central time.

Neighboring prefixes

Prefixes adjacent to 414-251
PrefixRate centerCode holder
414-248 Milwaukee Zone 1 NEW CINGULAR WIRELESS PCS, LLC - IL
414-249 Milwaukee Zone 1 T-MOBILE USA, INC.
414-250 Milwaukee Zone 1 TELEPORT COMMUNICATIONS AMERICA, LLC WI
414-252 Milwaukee Zone 1 AT&T ENTERPRISES, LLC
414-253 Milwaukee Zone 1 BANDWIDTH.COM CLEC, LLC - WI
414-254 Milwaukee Zone 1 UNITED STATES CELLULAR - WI

FAQ

Where is 414-251 located?

The prefix is assigned to the Milwaukee Zone 1 rate center in WI, area code 414. It is part of the Milwaukee-Waukesha, WI Metropolitan Statistical Area.

Which company owns 414-251 numbers?

TELEPORT COMMUNICATIONS AMERICA, LLC WI holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.

Is a call from 414-251 safe to answer?

The prefix itself says nothing about the caller. Legitimate Milwaukee Zone 1 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.