Prefix 410-338 — Baltimore, MD

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

The 410-338 prefix belongs to area code 410 and is anchored to the Baltimore rate center (MD). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

Baltimore is part of the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area. For routing purposes it sits in LATA 238. Numbers here keep Eastern time.

The assigned code holder is VERIZON MARYLAND, INC., operating company number 9212. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

Caller ID showing 410-338 is not proof the call came from Baltimore: 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

FAQ

Where is 410-338 located?

The prefix is assigned to the Baltimore rate center in MD, area code 410. It is part of the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area.

Which company owns 410-338 numbers?

VERIZON MARYLAND, 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 410-338 safe to answer?

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