The Domain Name System (or DNS) converts human readable domain names (like: www.google.com) into Internet Protocol (IP) addresses (like: 126.96.36.199).
Computers can only communicate using series of numbers, so DNS was developed as a sort of “phone book” that translates the domain you enter in your browser into a computer readable IP.
DNS - which controls what your domain name points to is different from REGISTRAR, the place where you purchased and renew your domain. But while DNS can be managed from a service other than your REGISTRAR, for most cases the REGISTRAR also handles the DNS.
So if you bought your domain at GoDaddy, most likely you are also managing DNS through GoDaddy.
Not sure what company controls your registration and DNS?, do a WhoIS search on your domain: https://whois.icann.org/en