301 Area Code — Rockville, Maryland

Area code 301 serves Rockville, MD.

Most looked-up 301 numbers

• 301-969-4232
• 301-969-9948
• 301-709-8723
• 301-572-7740
• 301-291-8732
• 301-206-4001
• 301-933-4444
• 301-340-2309
• 301-471-7829
• 301-256-8384
• 301-747-7610
• 301-538-6436

Phone prefixes in 301

• 301-538
• 301-969
• 301-709
• 301-572
• 301-291
• 301-206
• 301-933
• 301-340
• 301-471
• 301-256
• 301-747

Carriers serving 301

• Bandwidth (4 numbers)
• T-Mobile (2 numbers)
• Verizon Maryland, Inc. (2 numbers)
• Verizon (1 numbers)
• At&t (1 numbers)
• Atlantech Online, Inc. - DC (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 11 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