(301) Area Code Business Phone Numbers

Get a real 301 number and sound like you're right down the street from your customers in Frederick, Rockville, or Silver Spring. The 301 code has covered western and southern Maryland since 1947, and it still carries weight with locals who prefer doing business with neighbors.

Get a 301 Number

About the 301 Area Code

Area Code301

Established1947

Primary CityFrederick, MD

StateMaryland

TimezoneEastern

The 301 area code is one of the originals, dating back to 1947 when it covered the entire state of Maryland. Over the decades it got carved up, and today 301 sits alongside its overlay partner 240 across western Maryland, Frederick County, and the DC suburbs. If someone answers a 301 call, chances are they've been in the region a while.

Frederick has quietly turned into one of Maryland's economic powerhouses, with a $15.4 billion county GDP and a growing cluster of life sciences and biotech names like AstraZeneca, Lonza, and Kite[1]. The city itself now sits at roughly 94,800 people and is growing close to 3% a year, which means a steady stream of new residents, contractors, and small businesses looking for local vendors[2].

Whether you're running a plumbing crew out of Hagerstown or a small law practice in Rockville, a 301 number tells callers you're part of the community. People screen unknown numbers hard these days, and an out-of-area code often goes straight to voicemail. A local number is the cheapest trust signal you can buy.

Cities Served by the 301 Area Code

The 301 code stretches across a huge slice of Maryland, from Cumberland in the west to Bowie and Waldorf near the bay. Here are the biggest cities where a 301 number reads as local.

Aspen Hill, MD North Bethesda, MD Bowie, MD Chillum, MD Clinton, MD College Park, MD Cumberland, MD Fairland, MD Fort Washington, MD Frederick, MD Gaithersburg, MD Germantown, MD Greenbelt, MD Hagerstown, MD Landover, MD Montgomery Village, MD South Laurel, MD North Potomac, MD Olney, MD Potomac, MD Rockville, MD Silver Spring, MD Saint Charles, MD Suitland, MD Waldorf, MD White Oak, MD

Features Built for Frederick-Area Businesses

Every Tonet plan comes with the tools a small team actually uses day to day, without upsells or per-feature charges.

Auto Attendant

Route callers to the right person without hiring a receptionist. Great for contractors juggling job sites across Montgomery and Frederick counties.

Call Recording

Keep a record of quotes, service calls, and client conversations. Handy when a customer swears you said something different last week.

AI Transcription

Voicemails land in your inbox as text so you can read them between meetings or while driving down I-270.

Business SMS

Text customers from your 301 number. Perfect for confirming appointments or sending an ETA when traffic on the Beltway is a mess.

Mobile App

Take business calls on your cell without giving out your personal number. Works the same whether you're in Rockville or on vacation.

Daily Billing

Plans start at $10 per user per month, billed daily. Add or remove seats anytime and you only pay for what you use.

Frequently Asked Questions

Can I get a 301 number if my business isn't in Maryland?

Yes. Tonet doesn't require proof of a local address, so you can pick a 301 number even if your office is elsewhere. Plenty of businesses grab one to serve customers in the Frederick and DC-metro area.

What's the difference between 301 and 240?

They cover the same geographic area. 240 was added as an overlay in 1997 when 301 started running out of numbers. To locals, both read as western Maryland numbers.

How much does a 301 number cost?

Numbers are $2.50 per month each, and plans start at $10 per user per month billed daily. No contracts, no setup fees.

Can I port my existing 301 number to Tonet?

Yes. If you already have a 301 number with another carrier, we'll port it over for free. Most ports finish in about a week.

Do 301 numbers work with texting?

They do. Business SMS is included, so you can send and receive texts from your 301 number using the desktop or mobile app.

Ready to sound local in Maryland?

Pick a 301 number, set up your greeting, and start taking calls in a few minutes.

Get Started