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Aerial view of the entire Inner Harbor, Baltimore, August 2020. Photo by Chris6d

Business phone numbers in Maryland

341,000+ local numbers available now, from Washington, D.C. suburbs, Baltimore, Gaithersburg and across the state. Pick one, and it's ringing in minutes.

341,000+
numbers available
6
area codes with stock
165
local calling areas
Free
porting, any volume
The Old Line State

Doing business by phone in Maryland

Maryland splits between the Baltimore region and the Washington, D.C. suburbs of Montgomery and Prince George's counties. Federal agencies and contractors, biotech, the port of Baltimore and the Eastern Shore's farms and resorts all depend on reliable phones.

Local tipBaltimore and the Eastern Shore are 410, 443 and 667. Western Maryland and the D.C. suburbs are 301, 240 and 227.
Capital
Annapolis
Largest metros
Baltimore, Columbia, Germantown, Silver Spring
Time zone
Eastern
Area codes with stock
410, 443, 667, 301, 240, 227
Inventory checked
November 4, 2026
For MSPs and IT shops

Sell phone service to Maryland businesses under your own name

SimuWave is the carrier behind it. You brand it, price it and own the customer, and we handle the numbers, the network, E911 and the paperwork. Same published rates in every state.

$0platform fee, ever
$4.00per extension, per month
$1.50per local number, per month
$0.019per minute, published
Questions

Maryland phone numbers: common questions

What area codes can I get in Maryland?

Right now we have numbers in 6 Maryland area codes: 410, 443, 667, 301, 240, 227. The most stock is in 410, which reaches Towson, Severna Park, Fork. Stock changes daily, so search for the exact town you want.

Can I get a number in a specific Maryland town?

Yes. Numbers are tied to a local calling area, so pick the town your customers are in and the number reads as local to them. Washington, D.C. suburbs, Baltimore, Gaithersburg have the deepest stock right now. Search above, or open the full search with every town in Maryland.

Can I keep my existing Maryland business number?

Yes. Porting is free, in any volume. Keep the number your customers already know and point it at SimuWave. It can ring desk phones and cell phones at the same time.

How fast can a Maryland number be working?

A new number is live in minutes: choose it, attach a call flow, and it rings. Ports take longer because the current carrier has to release the number, and the number keeps working on the old service until the port completes.

What time zone should I set for Maryland business hours?

Maryland is on Eastern time. Set your business hours once in the call flow, and after-hours calls go to voicemail, an answering service or a cell phone automatically.

Nearby

States next to Maryland

Photo: Inner Harbor, by Chris6d (Wikimedia Commons), CC BY-SA 4.0. Resized.

Maryland Business Phone Numbers — 6 Area Codes | SimuWave