Prefix 414-312 — Milwaukee Zone 1, WI

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

Area code
414
Prefix (NXX)
312
Rate center
Milwaukee Zone 1
State
Wisconsin
Time zone
Central
Code holder
LEVEL 3 COMMUNICATIONS, LLC - WI
OCN
5489
Pooled
Yes (thousands-block pooling)
Assigned
2005-11-09
LATA
356

A phone number starting 414-312 was issued in the Milwaukee Zone 1 rate center of WI — part of area code 414.

NANPA's central-office code records list LEVEL 3 COMMUNICATIONS, LLC - WI (OCN 5489) as the code holder, assigned November 9, 2005. Because 414-312 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

A scammer can display 414-312 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 414-312
PrefixRate centerCode holder
414-308 Milwaukee Zone 1 PAETEC ITEL, LLC
414-309 Milwaukee Zone 1 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI
414-310 Milwaukee Zone 1 ONVOY, LLC - WI
414-313 Milwaukee Zone 1 UNITED STATES CELLULAR - WI
414-314 Milwaukee Zone 1 SPOK, INC.
414-315 Milwaukee Zone 1 UNITED STATES CELLULAR - WI

FAQ

Where is 414-312 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 414-312 numbers?

LEVEL 3 COMMUNICATIONS, 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 414-312 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.