Area Code 443: Maryland, Maryland
443 is a telephone area code serving Maryland. It is part of the North American Numbering Plan and is dialed with the country code +1.
Numbers beginning with 443 are located in Maryland, United States (NANP region: Central).
How to Dial Area Code 443
| Calling from | What to dial |
|---|---|
| Anywhere in the US or Canada | 1 443 XXX-XXXX (10-digit dialing: 443 + 7-digit number) |
| Local call inside the same area code | 7-digit number in most areas; 10 digits where an overlay code is active |
| From the UK or Europe | 00 1 443 XXX XXXX |
| From Australia | 0011 1 443 XXX XXXX |
| From a mobile phone anywhere | +1 443 XXX XXXX |
Whatever country you are calling from, the + symbol replaces the exit code. Save the contact as +1 443 XXXXXXX and it will dial correctly from any phone in the world.
Time Zone for Area Code 443
Calls to a 443 number ring in the America/New_York time zone, standard offset UTC-05:00. Daylight saving time applies here, so the offset moves forward one hour from March to November.
Other Area Codes in Maryland
These codes also serve Maryland. Area codes are assigned by the North American Numbering Plan Administration (NANPA).
| Area Code | Cities / Coverage |
|---|---|
| 240 | Suburban MD (overlay) |
| 301 | Silver Spring, Rockville |
| 410 | Baltimore, Annapolis |
| 667 | Baltimore (overlay) |
See all 5 area codes in Maryland →
Frequently Asked Questions
Where is area code 443?
Area code 443 is in Maryland, United States. It covers Baltimore (overlay).
What time zone is area code 443 in?
Area code 443 rings in the America/New_York time zone (UTC-05:00 standard).
Do I need to dial 1 before area code 443?
Yes, for a long-distance call inside the US and Canada you dial 1 first, then 443, then the seven-digit number. The 1 is the North American long-distance trunk prefix — it is not the country code. From outside North America you dial your exit code then 1 then 443.
Is area code 443 toll-free?
No. 443 is a standard geographic area code, so normal long-distance rates apply unless your plan includes them. Toll-free NANP codes are 800, 833, 844, 855, 866, 877 and 888.