email.udc.edu has one IP number , which also has a corresponding reverse pointer. pop.udc.edu, owa.udc.edu, pop3.udc.edu, email8.udc.edu, www.owa.udc.edu and at least three other hosts point to the same IP. www.email.udc.edu are subdomains to this hostname. udc.edu is a domain controlled by five nameservers. Some of them are on the same IP network. Incoming mail for udc.edu is handled by four mailservers. Two of them are on the same IP network. udc.edu has one IP number. email.udc.edu is hosted on a server in United States.