Prefix 414-210 — Milwaukee Zone 1, WI

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

Area code
414
Prefix (NXX)
210
Rate center
Milwaukee Zone 1
State
Wisconsin
Time zone
Central
Code holder
T-MOBILE USA, INC.
OCN
6529
Pooled
Yes (thousands-block pooling)
Assigned
2015-02-05
LATA
356

Numbers in the 414-210 prefix are registered to the Milwaukee Zone 1 rate center in WI, inside area code 414. The prefix is the second block of a ten-digit US number (414-210-XXXX) and pins the number to a billing locality.

Code-holder of record: T-MOBILE USA, INC. (OCN 6529), assigned February 5, 2015. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 414-210 numbers may be served by different companies.

The rate center lies in the Milwaukee-Waukesha, WI Metropolitan Statistical Area. The serving LATA is 356. Local time follows the Central zone.

Spoofing means this prefix on your screen doesn't guarantee a Milwaukee Zone 1 caller. Verify independently before trusting a request for money or data.

Neighboring prefixes

Prefixes adjacent to 414-210
PrefixRate centerCode holder
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
414-212 Milwaukee Zone 1 WISCONSIN BELL INC
414-213 Milwaukee Zone 1 T-MOBILE USA, INC.
414-214 Milwaukee Zone 4 MCIMETRO ACCESS TRANSMISSION SERVICES LLC

FAQ

Where is 414-210 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 414-210 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 414-210 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.