Prefix 414-400 — Milwaukee Zone 1, WI

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

Area code
414
Prefix (NXX)
400
Rate center
Milwaukee Zone 1
State
Wisconsin
Time zone
Central
Code holder
ONVOY, LLC - WI
OCN
225C
Pooled
Yes (thousands-block pooling)
Assigned
2012-10-18
LATA
356

A phone number starting 414-400 was issued in the Milwaukee Zone 1 rate center of WI — part of area code 414.

Code-holder of record: ONVOY, LLC - WI (OCN 225C), assigned October 18, 2012. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 414-400 numbers may be served by different companies.

A scammer can display 414-400 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 414-400
PrefixRate centerCode holder
414-397 Milwaukee Zone 1 T-MOBILE USA, INC.
414-398 Milwaukee Zone 1 ONVOY, LLC - WI
414-399 Milwaukee Zone 1 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI
414-401 Milwaukee Zone 1 NEW CINGULAR WIRELESS PCS, LLC - IL
414-402 Milwaukee Zone 1 SPOK, INC.
414-403 Milwaukee Zone 1 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI

FAQ

Where is 414-400 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 414-400 numbers?

ONVOY, 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 414-400 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.