301 Area Code — Rockville, Maryland

Area code 301 serves Rockville, MD.

Most looked-up 301 numbers

• 301-969-4232
• 301-538-6436
• 301-969-9948
• 301-709-8723
• 301-572-7740
• 301-291-8732

Phone prefixes in 301

• 301-538
• 301-969
• 301-709
• 301-572
• 301-291

Carriers serving 301

• Bandwidth (1 numbers)
• T-Mobile (1 numbers)
• At&t (1 numbers)
• Verizon Maryland, Inc. (1 numbers)

Frequently asked questions

Where is area code 301?

Area code 301 serves Rockville, MD.

What prefixes are in area code 301?

Phone2.io tracks 5 phone prefixes in area code 301, with carrier and spam-report data on individual numbers.

More about area code 301

Area code 301 overview, history, and local numbers · Get a MD phone number

Last updated: April 16, 2026