Area Code 301

Maryland (MD) • Silver Spring, Bethesda, Frederick, Gaithersburg, Hyattsville, Bowie, Rockville, Hagerstown • Eastern Time (ET)

What Stands Out

•Coverage: 3.0M people across 207 ZIP codes.
•Overlapping area codes: 227, 240.
•Major cities: Silver Spring, Bethesda, Frederick.

Spotlight: Coverage

Snapshot highlights for area code 301.

Income

91st

Home values

88th

Poverty rate

42nd

Area Code Basics

Primary State

Maryland (MD)

States Served

Maryland (MD)

Major Cities

Silver Spring, Bethesda, Frederick, Gaithersburg, Hyattsville, Bowie, Rockville, Hagerstown

Time Zone(s)

Eastern Time (ET)

Est. Population

3.0M

ZIP Codes

207

Data accuracy & methodology

This report aggregates 2020–2024 ACS 5-year estimates and geographic overlays for orientation. Area-code service areas can cross ZIP/state boundaries and change over time; verify official assignments with NANPA for critical use.