Prefix 414-451 — Milwaukee Zone 1, WI
- Area code
- 414
- Prefix (NXX)
- 451
- Rate center
- Milwaukee Zone 1
- State
- Wisconsin
- Time zone
- Central
- Code holder
- ONVOY SPECTRUM, LLC
- OCN
- 624H
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2025-01-29
- LATA
- 356
The 414-451 prefix belongs to area code 414 and is anchored to the Milwaukee Zone 1 rate center (WI). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.
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.
NANPA's central-office code records list ONVOY SPECTRUM, LLC (OCN 624H) as the code holder, assigned January 29, 2025. Because 414-451 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
Caller ID showing 414-451 is not proof the call came from Milwaukee Zone 1: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 414-448 | Milwaukee Zone 3 | PAETEC ITEL, LLC |
| 414-449 | Milwaukee Zone 1 | WISCONSIN BELL INC |
| 414-450 | Milwaukee Zone 4 | EON TELECOM, INC. |
| 414-452 | Milwaukee Zone 1 | UNITED STATES CELLULAR - WI |
| 414-453 | Milwaukee Zone 1 | WISCONSIN BELL INC |
| 414-454 | Milwaukee Zone 1 | WISCONSIN BELL INC |
FAQ
Where is 414-451 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 414-451 numbers?
ONVOY SPECTRUM, LLC 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 414-451 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.