How To Call Mumong, Brunei Darussalam

from the United States

  1. Dial 011 (the international access code)
  2. then dial 673 (the country code for Brunei Darussalam)
  3. then dial 3 (the city code for Mumong)
  4. then dial the local telephone number
  5. depending on your phone company, you may be able to finish by pressing #, which will connect the call more quickly.

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