ns4.blo.com has one IP number , which is the same as for blo.com. a1.com, ab.net, vr.com, lk.com, dos.com and at least 100 other hosts point to the same IP. hailscape.org use this as a nameserver. blo.com is a domain controlled by two nameservers at anything.com. They are on the same IP network. Incoming mail for blo.com is handled by one mailserver at blo.com themselves. ns4.blo.com is hosted on a server in United States.