Incoming mail for ns.tfm.com is handled by one mailserver at bsd.org. ns.tfm.com has one IP number , which also has a corresponding reverse pointer. ns.roycroft.us point to the same IP. db.net, bsd.org, tik.com, tfm.net, tfm.com and at least 32 other hosts use this as a nameserver. hp.tfm.com, ppp.tfm.com, pop.tfm.com, ns2.tfm.com, ns1.tfm.com and at least 30 other hosts share mailservers with this domain. tfm.com is a domain controlled by three nameservers at tfm.com themselves. All of them are on different IP networks. Incoming mail for tfm.com is handled by four mailservers. All of them are on the same IP network. ns.tfm.com is hosted on a server in United States.