City of Columbia


301 Area code: Columbia, Howard - 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).

  • 3016299100 | +1 301-629-9100 Maryland U.S.A.
  • 3016299101 | +1 301-629-9101 Maryland U.S.A.
  • 3016299102 | +1 301-629-9102 Maryland U.S.A.
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  • 3016299110 | +1 301-629-9110 Maryland U.S.A.
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  • 3016299112 | +1 301-629-9112 Maryland U.S.A.
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  • 3016299178 | +1 301-629-9178 Maryland U.S.A.
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  • 3016299199 | +1 301-629-9199 Maryland U.S.A.