Area code 443
Area code 443 serves Baltimore and nearby parts of Maryland, including Columbia, Towson and Glen Burnie. It is on Eastern Time, which observes daylight saving time. 410 and 667 are overlays for the same area.
Area code 443 at a glance
Cities in 443
- Baltimore
- Columbia
- Towson
- Glen Burnie
An area code shows where a number was first assigned. Mobile numbers keep their area code when people move, so the person you’re calling may be somewhere else.
When you can call a 443 number
Federal telemarketing rules under the TCPA allow sales calls between 8 AM and 9 PM in the called person’s local time. Here is that window for a 443 number, shown in your own time zone.
General information, not legal advice. Some states add rules for Sundays, holidays or the number of calls. See our calling hours guide.
| If you’re on | You can call 443 between |
|---|---|
| Eastern | 8:00 AM to 9:00 PM |
| Central | 7:00 AM to 8:00 PM |
| Mountain | 6:00 AM to 7:00 PM |
| Arizona | 5:00 AM to 6:00 PM |
| Pacific | 5:00 AM to 6:00 PM |
See the time in 443 without leaving your CRM
Parse is a free Chrome extension that shows the local time and weather beside every phone number on the page.
Other area codes in Maryland
Questions about 443
What time zone is area code 443?
Area code 443 is on Eastern Time. It observes daylight saving time.
Where is area code 443?
Area code 443 is in Maryland. Its main city is Baltimore, and it also covers Columbia, Towson and Glen Burnie.
What are the legal hours to call a 443 number?
Under the federal TCPA, sales calls are allowed from 8 AM to 9 PM in the called person’s local time. Personal and informational calls are not limited by these hours.
What area codes overlay 443?
410 and 667 cover the same area as 443, so numbers in the same town can have either code.