252.10.193.in-addr.arpa is a domain controlled by four nameservers. Two of them are on the same IP network. uio.no, com.mt, mork.no, tele2.se, swip.net and at least 66 other hosts share nameservers with this domain. 10.193.in-addr.arpa is a domain controlled by four nameservers. All of them are on different IP networks.