Prefix 414-340 — Milwaukee Zone 1, WI
- Area code
- 414
- Prefix (NXX)
- 340
- Rate center
- Milwaukee Zone 1
- State
- Wisconsin
- Time zone
- Central
- Code holder
- ONVOY, LLC - WI
- OCN
- 225C
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2023-09-13
- LATA
- 356
414-340 identifies a block of numbers in Milwaukee Zone 1, WI, within the 414 area code. Every US prefix is tied to exactly one rate center; this one is Milwaukee Zone 1.
The rate center lies in the Milwaukee-Waukesha, WI Metropolitan Statistical Area. The serving LATA is 356. Local time follows the Central zone.
Treat the on-screen number as a hint, not evidence — 414-340 can be spoofed like any US prefix. If a call feels off, verify through an official callback number and file a complaint with the FCC or FTC.
Code-holder of record: ONVOY, LLC - WI (OCN 225C), assigned September 13, 2023. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 414-340 numbers may be served by different companies.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 414-337 | Milwaukee Zone 1 | WISCONSIN BELL INC |
| 414-338 | Milwaukee Zone 1 | ONVOY, LLC - WI |
| 414-339 | Milwaukee Zone 1 | NEW CINGULAR WIRELESS PCS, LLC - IL |
| 414-341 | Milwaukee Zone 1 | WISCONSIN BELL INC |
| 414-342 | Milwaukee Zone 1 | WISCONSIN BELL INC |
| 414-343 | Milwaukee Zone 1 | WISCONSIN BELL INC |
FAQ
Where is 414-340 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 414-340 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 414-340 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.