410 Area Code: Baltimore's Number on the Harbor

410 was created in 1991 when Maryland's original 301 area code split, giving Baltimore and the eastern part of the state their own dedicated prefix.

History & Coverage

410 launched in 1991 covering Baltimore and the Eastern Shore of Maryland. As demand grew, the 443 overlay was added in 1997, followed by 667 in 2016, but 410 remains the number most associated with the city itself.

Why Businesses Choose 410

• World-class healthcare research: Johns Hopkins Hospital and University, globally renowned for medical research, anchor 410's healthcare-industry credibility
• Port and logistics hub: the Port of Baltimore is one of the busiest on the East Coast, giving 410 strong logistics and trade relevance
• Biotech corridor growth: Maryland's biotech industry, clustered around Johns Hopkins and federal research funding, adds further weight to the code

Key Industries & Neighborhoods

The Inner Harbor anchors tourism and hospitality, while East Baltimore's Johns Hopkins medical campus drives one of the largest concentrations of biotech and healthcare research in the country.

Fun Facts

• Johns Hopkins Hospital, within the 410 area, has been ranked among the top hospitals in the US for decades
• The Port of Baltimore is one of the busiest ports on the East Coast for automobile and specialized cargo

Conclusion

For healthcare, biotech, and logistics businesses on the mid-Atlantic coast, 410 remains the definitive number tied to Baltimore's research and port economy.