Why Voter Registration Data is Available Here
Per North Carolina law (General Statute 132), "The public records and public information compiled by the agencies of North Carolina Government or its subdivisions are the property of the people. Therefore, it is the policy of this State that the people may obtain copies of their public records and public information free or at minimal cost unless otherwise specifically provided by law." (Voter registration records are not exempt from this law.)
Date of birth is not provided in voter records. Per § 163-82.10, effective June 1, 2005, dates of birth that may be generated in the voter registration process, by either the State Board of Elections or a County Board of Elections, are confidential and shall not be considered public records and subject to disclosure to the general public under Chapter 132 of the General Statutes. No list produced under this section shall contain a voter's date of birth; however, lists may be produced according to voters' ages.