667 area code
Baltimore area, Eastern Time.Area code 667 covers Baltimore, Pikesville, Salisbury and 99 more places in Maryland, on Eastern Time. 410 and 443 cover the same area.
Right now in Baltimore
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer)
Calling hours: Every day, 8 AM to 8 PM (Maryland law)
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Where 667 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 667 has 102. Each one's share is how many 667 numbers start there. Its biggest metro area is Baltimore-Columbia-Towson, MD.
- Baltimore17%
- Pikesville5%
- Salisbury5%
- Aberdeen5%
- Annapolis4%
- Catonsville3%
- Columbia3%
- Towson2%
Also: Glen Burnie, Odenton, Bel Air, Elkton, Parkville, Essex, Prince Frederick, Westminster, Severn, Cambridge, Elkridge, Severna Park + 82 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 667 number?
Sales calls to homes and cell phones have legal hours, set by Maryland law. Hold every 667 number to them, since you can't tell a work line from a personal cell.
What applies to 667Every day, 8 AM to 8 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
- Maryland lawEvery day, 8 AM to 8 PMAlso no more than 3 calls in 24 hours on the same subject.Md. Code, Com. Law 14-4502(c) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
667 and 410 and 443
667 went into service on March 24, 2012. 667, 410 and 443 cover the same area, so new numbers can get any of them and neighbors can have different area codes. 667 holds 22% of the area's exchanges; 443 holds the most. Local calls take all 10 digits.
- 1991410 overlay
- 1997443 overlay
- 2012667 starts
Source: NANPA area code database
Other Maryland area codes
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667 area code FAQ
What area code is 667?
667 is a Maryland area code for Baltimore, Pikesville, Salisbury, Aberdeen and 98 more places.
What time zone is the 667 area code in?
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer).
Is 410 the same as 667?
Same area, different code. 667, 410 and 443 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 667 numbers?
Every day, 8 AM to 8 PM, local time, under Maryland law.
When did the 667 area code start?
On March 24, 2012.
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