In Denmark telephone numbers consist of eight digits. If you are calling from outside Denmark, the eight digit number must be preceded by the country code 45, often written as +45 followed by the eight digit telephone number.
In Greenland, telephone numbers consist of six digits preceded by country code 299 if calling from abroad.
The Faroe Islands country code is 298 followed by their five digit telephone numbers.
112 Police, ambulance, fire department
70 13 00 41 Doctor (between 8:00 am and 4:00 pm)
35 38 02 51 Dentist
Emergency calls (112) from public booths are free.