Prefix 410-264 — Waterloo 236, MD

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

The 410-264 prefix belongs to area code 410 and is anchored to the Waterloo 236 rate center (MD). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

Waterloo 236 is part of the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area. For routing purposes it sits in LATA 236. Numbers here keep Eastern time.

NANPA's central-office code records list VERIZON MARYLAND, INC. (OCN 9212) as the code holder. Because 410-264 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

Caller ID showing 410-264 is not proof the call came from Waterloo 236: 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 410-264 located?

The prefix is assigned to the Waterloo 236 rate center in MD, area code 410. It is part of the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area.

Which company owns 410-264 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 410-264 safe to answer?

The prefix itself says nothing about the caller. Legitimate Waterloo 236 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.