Summary

ns1.dom.yahoo.co.jp, ns2.dom.yahoo.co.jp, dns1.dom.yahoo.co.jp, ns04.dom.yahoo.co.jp, dns2.dom.yahoo.co.jp and at least eight other hosts are subdomains to this hostname. yahoo.co.jp is a domain controlled by two nameservers on different IP networks. Incoming mail for yahoo.co.jp is handled by four mailservers having a total of ten IP numbers. There are four duplicated IP numbers. Some of them are on the same IP network. yahoo.co.jp has two IP numbers. They are on different IP networks.