Prefix 414-206 — Milwaukee Zone 4, WI

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

Area code
414
Prefix (NXX)
206
Rate center
Milwaukee Zone 4
State
Wisconsin
Time zone
Central
Code holder
T-MOBILE USA, INC.
OCN
6529
Pooled
Yes (thousands-block pooling)
Assigned
2015-05-22
LATA
356

The 414-206 prefix belongs to area code 414 and is anchored to the Milwaukee Zone 4 rate center (WI). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

Milwaukee Zone 4 is part of the Milwaukee-Waukesha, WI Metropolitan Statistical Area. For routing purposes it sits in LATA 356. Numbers here keep Central time.

Code-holder of record: T-MOBILE USA, INC. (OCN 6529), assigned May 22, 2015. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 414-206 numbers may be served by different companies.

Caller ID showing 414-206 is not proof the call came from Milwaukee Zone 4: 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

Prefixes adjacent to 414-206
PrefixRate centerCode holder
414-203 Milwaukee Zone 1 MCIMETRO ACCESS TRANSMISSION SERVICES LLC
414-204 Milwaukee Zone 1 NUSO, LLC
414-205 Milwaukee Zone 1 SPOK, INC.
414-207 Milwaukee Zone 1 MCIMETRO ACCESS TRANSMISSION SERVICES LLC
414-208 Milwaukee Zone 1 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI
414-209 Milwaukee Zone 3 MCIMETRO ACCESS TRANSMISSION SERVICES LLC

FAQ

Where is 414-206 located?

The prefix is assigned to the Milwaukee Zone 4 rate center in WI, area code 414. It is part of the Milwaukee-Waukesha, WI Metropolitan Statistical Area.

Which company owns 414-206 numbers?

T-MOBILE USA, INC. 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 414-206 safe to answer?

The prefix itself says nothing about the caller. Legitimate Milwaukee Zone 4 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.