# Registrars

ZNS Registrars represent two levels of contracts responsible for the registration of root (World) domains and subdomains, as well as revocation, reclamation, and subdomain distribution. Registrars tie all ZNS contracts together to achieve atomic operations for the crucial flows of the system.

[idistributionconfig](registrars/idistributionconfig "mention")

[iznsrootregistrar](registrars/iznsrootregistrar "mention")

[znsrootregistrar](registrars/znsrootregistrar "mention")

[iznssubregistrar](registrars/iznssubregistrar "mention")

[znssubregistrar](registrars/znssubregistrar "mention")
