Prefix 410-307 — Towson, MD

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

The 410-307 prefix belongs to area code 410 and is anchored to the Towson rate center (MD). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

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

Code-holder of record: VERIZON MARYLAND, INC. (OCN 9212). The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 410-307 numbers may be served by different companies.

Caller ID showing 410-307 is not proof the call came from Towson: 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 410-307 located?

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

Which company owns 410-307 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 410-307 safe to answer?

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