Summary
wvbizdns03.imsbiz.com has one IP number , which also has a corresponding reverse pointer.
ns6.imsbiz.com point to the same IP.
imsbiz.com is a domain controlled by two nameservers at
imsbiz.com themselves. They are on different IP networks. Incoming mail for
imsbiz.com is handled by one mailserver having a total of two IP numbers. They are on the same IP network.
wvbizdns03.imsbiz.com is hosted on a server in Hong Kong.