To find someone who lives in Denmark, use the Danish Civil Registration System, or CRS. The CRS contains personal registration details about those people who are living in Denmark.
The CRS was established in 1968. The Danish CRS contains information like date of birth, personal identification number, place of birth, parents' identities, place of residence, full name and citizenship status. Every person who is registered under the CRS has a special personal identification number called the CPR number. CPR stands for "Centrale Person Register." The Danish CRS is updated regularly for maintaining the latest personal details especially on vital status. Danish epidemiological researchers use the CRS data for performing representative population-based studies.