Summary

blackhole.ukr.net has one IP number , but the reverse is localhost. ns4.de, sunx.org, cabi.net, celox.nl, jcaa.com and at least 100 other hosts point to the same IP. e.ukr.net, new.ukr.net, pop.ukr.net, mxs.ukr.net, ffe1.ukr.net and at least 18 other hosts use this as a mailserver. ukr.net is a domain controlled by two nameservers at ukr.net.ua. They are on the same IP network. Incoming mail for ukr.net is handled by one mailserver at ukr.net themselves. ukr.net has one IP number.

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