AFRINIC manages reverse delegations (RDNS) for the IPv4 and IPv6 address space allocated by IANA to AFRINIC.
When resources are issued to network operators, AFRINIC delegates the authority of reverse zones to those operators, who in turn have to publish the name servers of their reverse zones in AFRINIC managed zones. As you know, RDNS allow applications on the Internet to map an IP to a host and is considered to be an important mechanism used by many applications on the Internet for example by mail servers in the prevention of spam. It is therefore very important to have accurate data about reverse domains in the AFRINIC WHOIS database as those misconfigurations can have multiple adverse impact on the robustness of the DNS.
AFRINIC has around 30000 domain objects with 72000+ NS records with more than 45% of lame NS records in IPv4 zones and 32% of lame NS records IPv6. This constitutes around 25% of all domain objects being lame.