The 667 area code is a telephone areas codes in the North American Numbering Plan (NANP) that serves the U.S. state of Maryland. It works as an overlay area code for the 410 and 443 area codes, providing additional phone numbers without changing existing ones. Whether you receive a call from a 667 number or plan to get one for your home or business, understanding its coverage, history, and benefits can help you identify where the call originates and whether it is legitimate.
What Is the 667 Area Code?
The area code 667 is a telephone areas codes serving eastern and central Maryland, including the city of Baltimore and surrounding suburbs. It is one of three overlay area codes, 410, 443, and 667, that all serve the same numbering plan area, which includes the Baltimore metropolitan area and the Eastern Shore.
Where Is the 667 Area Code Located?
The 667 area code location serves central and eastern Maryland. Instead of replacing an existing area code, it overlays the 410 and 443 area codes, meaning all three area codes cover the same geographic region.
Residents and businesses within this service area can receive phone numbers beginning with 410, 443, or 667, regardless of their exact location.
Major cities covered
Some of the largest cities and communities using the 667 area code usa include:
History and Origin of the 667 Area Code
The story of 667 is really the story of Maryland running out of phone numbers over several decades. Telephone authorities created the 410 area code in 1991 by splitting it from the 301 area code to serve the Baltimore metropolitan area and Maryland’s Eastern Shore. However, within just five years, the rapid growth of cell phones, pagers, and other communication services nearly exhausted the available phone numbers. As a result, authorities introduced the 443 area code as an overlay for the 410 region on July 1, 1997, ensuring a continued supply of telephone numbers.
How the Overlay System Works
Unlike older area code splits, which divided a region and required some residents to accept a new area code, the overlay system adds a new area code on top of an existing one without forcing anyone to change their current phone number. If you already have a phone number in the region, your current area code and seven-digit number won’t change. The price of your calls, wireless plan, coverage area, and other rates and services remain unaffected by the 667 overlay.
Time zone
The area code 667 location operates in the Eastern Time Zone (ET), which means the region follows Eastern Standard Time (UTC−5) during fall and winter, and switches to Eastern Daylight Time (UTC−4) during spring and summer when daylight saving time is in effect. This consistency makes it straightforward for callers across the country to know exactly what time it is in the Baltimore region before placing a call.
Key Facts and Numbering Details
Area code 667 usa currently has 379 active prefixes, of which about 65.7% are assigned to landlines, 34.3% to wireless numbers, and the remainder is unclassified. Roughly half of the possible prefixes remain inactive and unassigned, and telecom regulators have stated that the area code is not in jeopardy of running out of numbers anytime soon, so no additional relief planning is currently underway.
Demographics of the Region
The Baltimore-area overlay region is large and economically significant. Combined, the 410/443/667 overlay area serves a population of more than 4.3 million people. Maryland’s economy in this region is strong and diverse, anchored by healthcare, biotechnology, defense, IT, and education, as well as growing aerospace, cybersecurity, and government services sectors.
How to Dial a Number
To call a 667 number from within the United States, dial 1-667-XXX-XXXX, where XXX-XXXX represents the local number. From outside the U.S., dial your country’s exit code first, followed by +1-667-XXX-XXXX. Remember that because is part of an overlay system, ten-digit dialing is mandatory for all local calls in the region; you can’t drop the area code even when calling a neighbor.
Frequently Asked Questions (FAQs)
Conclusion
The 667 area code plays an essential role in Maryland’s telecommunications system by serving central and eastern parts of the state alongside the 410 and 443 areas codes. Introduced in 2012 to meet the growing demand for new phone numbers, it now supports millions of residents, businesses, government agencies, and mobile users.
