Maryland’s largest city and a historic Chesapeake Bay port, Baltimore is “Charm City” — famous for its Inner Harbor, its blue crabs, and its Orioles and Ravens. It is covered by the 410 code and two overlays. This guide breaks down Baltimore’s 410, 443, and 667 codes, the required 10-digit dialing, major ZIP codes, and local scam warnings.
Baltimore Area Codes at a Glance
| Detail | Information |
|---|---|
| Primary Area Code(s) | 410 |
| Overlay Area Code(s) | 443 & 667 |
| Time Zone | Eastern Time (ET) – EST / EDT |
| Major County | Baltimore City |
| Region | Baltimore Metro |
| Dialing Format | 10-digit dialing required |
Area Code Breakdown & Regional Mapping
410 – Baltimore & Eastern MD Code
Area code 410 was created in 1991 when it split from 301, serving Baltimore, the Eastern Shore, and southern Maryland. It is Baltimore’s original code and the historic mark of the Chesapeake region.
443 – Baltimore Area Overlay
Area code 443 arrived in 1997 as the first overlay for the 410 region, sharing the same Baltimore-and-eastern-Maryland geography. Many Baltimore lines carry a 443 prefix.
667 – Baltimore Area Overlay (newest)
Area code 667 is the 2012 overlay, layered over both 410 and 443 across the same region. Newer Baltimore-area lines may be issued a 667 number, fully local to the existing codes.
Neighborhoods & Local Coverage
Baltimore’s 410/443/667 codes cover a city of distinct waterfront neighborhoods. The Inner Harbor anchors downtown, while the cobblestoned Fells Point and the rowhouse-lined Federal Hill and Canton draw crowds to their pubs and restaurants. The cultural district of Mount Vernon holds the Washington Monument and the Peabody Institute.
Beyond the harbor, the same codes reach the artsy Hampden and Station North districts, the historic Bolton Hill and Roland Park neighborhoods, the maritime Locust Point near Fort McHenry, and the working communities of Highlandtown and East Baltimore near Johns Hopkins. The three codes tie the whole city and its inner suburbs together.
Local Dialing Rules & International Format
Baltimore and all of eastern Maryland have required 10-digit dialing for years — always dial the area code plus the 7-digit number. The 410, 443, and 667 codes are all local to one another. The Washington suburbs and western Maryland use a separate complex, 301/240.
Baltimore is in the Eastern Time Zone (EST/EDT), like all of Maryland. To call the city from outside the United States, dial your country’s exit code, then the U.S. country code +1, followed by the 10-digit number (for example, +1 410 XXX-XXXX). From inside the U.S. and Canada, simply dial 1 before the 10-digit number for long-distance calls.
Major ZIP Codes Covered
The 410 service area spans many of Baltimore’s core ZIP codes, including 21201, 21202, 21205, 21209, 21211, 21214, 21217, 21218, 21224, 21230, and 21231.
Spam & Scam Call Warnings in Baltimore
Baltimore residents report heavy volumes of neighbor-spoofing robocalls faking a local 410 prefix. Common scams impersonate BGE (utility shutoff), the IRS, and delivery services, along with fake-toll (E-ZPass Maryland) text scams.
| Scam Type | What to Watch For |
|---|---|
| Neighbor Spoofing | Calls that mimic a local 410 prefix to look familiar. |
| Utility / Toll Scams | Threats to shut off power or demand toll payment via gift cards. |
| IRS / Government | Robocalls claiming legal action — agencies never call to demand instant payment. |
Red flag: Any caller who pressures you to pay immediately with gift cards, wire transfers, or cryptocurrency is almost certainly running a scam. Hang up and verify through an official number.
↑ See the complete list of All US Area Codes by State for every code across the country.
Nearby & Related Maryland Cities
Frequently Asked Questions
What area code is Baltimore, MD?
Baltimore uses three area codes: the original 410, plus overlays 443 and 667.
Is 667 a real Baltimore area code?
Yes. 667 is the newest FCC-approved overlay for the 410/443 region, added in 2012 to expand number capacity across the Baltimore area.
Do I need to dial 10 digits in Baltimore?
Yes. All local calls in Baltimore and eastern Maryland require 10-digit dialing.
What time zone is Baltimore in?
Baltimore observes Eastern Time (EST/EDT), like all of Maryland.
Stay Safe & Explore More
- Verify an unknown caller in our Scam Alerts directory.
- Comparing nationwide numbers? See our Toll-Free Numbers guides.