Area codes in Baltimore, Maryland

Baltimore, Maryland uses 6 area codes — 301, 410, 240, 443, 667 and 227. The main Baltimore area code is 301.

Area codes serving Baltimore

• 301 — Baltimore
• 410 — Baltimore
• 240 — Baltimore
• 443 — Baltimore
• 667 — Baltimore
• 227 — Baltimore

Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.