667 Area Code: Baltimore's Newest Number, Explained

Introduction

The Baltimore region of Maryland has used the 667 area code since 2012. It is the newest of three codes that share the same ground, layered on top of the older 410 and 443. Maybe a call from this prefix just landed on your phone. Maybe you run a business and want a fresh local number in Baltimore or Annapolis. Either way, the 667 area code works a little differently than most, and this guide explains how. You'll learn its geography, its history, the cities it reaches, and the dialing rules that come with it.

Key Takeaways:

• The 667 area code has overlaid the same Baltimore and Eastern Shore territory as 410 and 443 since March 24, 2012.
• It is the third and newest code in the Baltimore stack, so open numbers are usually the easiest to find.
• Because it shares ground with 410 and 443, every local call needs the full 10-digit format.
• A 667 number carries the same local presence as a 410 or 443 one, just with a fresher range.

Where Is the 667 Area Code Located?

This area code covers the eastern half of the state, centered on Baltimore. It does not carve out its own patch of the map. Instead, it sits on top of the exact same territory already served by 410 and 443. That means the 667 area code reaches from the city and its suburbs across the Chesapeake Bay to the Eastern Shore. There is no separate "667 zone," because it shares every mile with two older codes. What makes it unusual is simple: it was added purely to keep new numbers flowing.

• 667 covers the Baltimore metro and its suburbs.
• It stretches east across the bay to the Eastern Shore.
• It runs on Eastern Time, like the whole region.
• It shares its footprint with 410 and 443.

History and Origin of the 667 Area Code

The 667 area code went into service on March 24, 2012. It was the third code added to the Baltimore region, after 410 in 1991 and the 443 overlay in 1997. By 2012, even two codes were running low on numbers, so regulators layered on a third. An overlay adds a new code to the same area without redrawing any lines or forcing anyone to switch. So no one with a 410 or 443 number had to change it. New phone lines simply started drawing from the 667 range.

How 667 Completes the Baltimore Code Stack

The 667 area code, 410, and 443 are not rivals or neighbors. They are three prefixes stacked on one region. A home on one street might have a 410 number while the business next door has a 667 number. You can read the story of the codes it joined in our guide to the 443 area code.

• All three codes cover the identical Baltimore and Eastern Shore region.
• A 667 number is no less local than a 410 or 443 number.
• New lines are most likely to draw 667, the freshest of the three.
• Neighbors can hold different codes on the very same block.

Cities and Communities Served by the 667 Area Code

This area code reaches a wide mix of communities across Maryland's eastern half. Baltimore anchors it as the largest city and a historic port. Around it spread suburbs like Towson, Glen Burnie, Dundalk, and Ellicott City. Columbia adds a large planned community in Howard County.

Southeast of the city, Annapolis serves as the state capital on the bay. Across the water, the Eastern Shore brings Salisbury, Easton, and the beach crowds of Ocean City. Choosing which of these markets to target is its own decision, and our area code guide helps weigh the options.

Time Zone and Dialing Rules for the 667 Area Code

Every community in this area code runs on Eastern Time. That means Eastern Standard Time in winter and Eastern Daylight Time in summer, matching the rest of the region. The dialing rule is where the overlay shows its hand. Because the 667 area code shares the same ground as 410 and 443, seven digits alone can no longer tell two numbers apart. So callers must dial all 10 digits, area code included, for every local call. The Wikipedia entry on area codes 410, 443, and 667 lays out the full timeline.

Why Businesses Choose a 667 Area Code Number

A local number in this area code sends a clear signal. It tells customers a business belongs to Baltimore and the bay, not a call center three states away. That local trust runs deep in a region proud of its roots. Because 667 is the newest code, it is usually the easiest to find an available number in, which helps when you want a clean, memorable line.

This is where a cloud phone provider like Rozper fits in. A business doesn't need a physical office in the region. Rozper lets it set up a local 667 number through a VoIP platform instead. The local presence stays intact, and calls can route anywhere the team actually works. Rozper backs that setup with 99.999% uptime and coverage across 150+ countries. A company can claim a Baltimore identity while its support or sales team works from anywhere else. It's a practical way to plant a flag without signing a lease.

How to Get a 667 Area Code Number

Getting a new number in this area code is usually quick. Because 667 is the freshest code in the region, open numbers are plentiful. The process looks the same as it does anywhere else:

1. Pick a cloud or VoIP provider that offers coverage in the region.
2. Search available numbers in the 667 area code and choose one that fits.
3. Confirm the number and point it at your existing phones or app.
4. Route incoming calls to any team, wherever they actually sit.

Businesses moving a number from an old provider need one extra step. They file a standard porting request, which usually takes a few business days. It's worth confirming the old number keeps working normally during the transfer.

Conclusion

Area code 667 joined the Baltimore region in 2012 as the third code layered on top of 410 and 443. It covers the city, its suburbs, the state capital at Annapolis, and the Eastern Shore across the bay, all on Eastern Time. Because it shares that ground with two older codes, every local call in the region needs 10 digits. For residents, the 667 area code is simply the newest local prefix for Baltimore and eastern Maryland. For businesses, it's an easy way to claim a fresh, unmistakably local number.