Area Code 443 Phone Number
for Your Business
Get a local 443 number for your business in Baltimore, MD. Cloud VoIP with SMS, an auto attendant (IVR), and more — starting at $30/ext/mo. No contracts.
What Is Area Code 443?
Area code 443 is a North American telephone area code serving Baltimore, Maryland and 1 other city in the region. It has been in service since June 1, 1997 and operates on Eastern Time. It is part of the 410/443/667 overlay complex. Businesses operating in the 443 area code region use local numbers to build trust with customers, improve answer rates, and establish a professional local presence.
With Zonitel, you can get a new 443 area code number or port your existing one with guided onboarding — no hardware required. Your team can make and receive calls from any device using the Zonitel mobile app or web portal.
Area Code 443 at a Glance
- Region
- Baltimore (overlay), Maryland
- In service
- Since June 1, 1997
- Time zone
- Eastern Time
- History
- Added on June 1, 1997 as an overlay of 410
- Telemarketing hours
- 8 a.m.–9 p.m. Eastern Time for residential numbers (TCPA, 47 CFR 64.1200(c)(1))
Cities Served by Area Code 443
Why Your Business Needs a 443 Local Number
A local number tells customers you're part of the community. People in Baltimore are more likely to pick up a call from a 443 number they recognize than from an unfamiliar out-of-area number.
Everything Included With Your 443 Number
Zonitel is not just a phone number — it's a complete cloud business phone system. Every plan includes:
Frequently Asked Questions About Area Code 443
What cities use area code 443?
Area code 443 serves the Baltimore (overlay) area of Maryland. Cities in the 443 region include Baltimore, MD; Columbia, MD.
Is area code 443 an overlay?
Yes. 443 is part of the 410/443/667 overlay, so new numbers in this region can come from any of those area codes, and local calls require 10-digit dialing.
What time zone is area code 443 in?
Area code 443 is in Eastern Time. Telemarketing calls to residential 443 numbers are limited to 8 a.m.–9 p.m. Eastern Time under the TCPA (47 CFR 64.1200(c)(1)).
Can I get a 443 number for my business without moving there?
Yes. With Zonitel's cloud VoIP, you can get a 443 area code number regardless of where your business is physically located. This lets you establish a local presence in Baltimore without a physical office.
Can I keep my existing 443 number and switch to Zonitel?
Yes. Number porting is free. Porting commonly takes 5–10 business days depending on your current carrier, and your old service stays active until the coordinated cutover.
How much does a 443 business phone number cost?
Zonitel plans start at $30/extension/month plus tax, with no setup fees and no contracts. Your 443 local number is included in the plan.
Get Your 443 Area Code Number Today
30-day free trial. No annual contract required. Guided onboarding.