City of Washington


301 Area code: Washington, District of Columbia - Landline

Directory Numbers

How to dial a U.S. number internationally:

  • Start with your country's exit code (e.g., 011 for the U.S. or Canada).
  • Dial the U.S. country code (+1).
  • Dial the 10-digit phone number (area code + local number).

  • 3015479900 | +1 301-547-9900 Maryland U.S.A.
  • 3015479901 | +1 301-547-9901 Maryland U.S.A.
  • 3015479902 | +1 301-547-9902 Maryland U.S.A.
  • 3015479903 | +1 301-547-9903 Maryland U.S.A.
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  • 3015479999 | +1 301-547-9999 Maryland U.S.A.