CF1762778992305-tsm20251109205412

NSLIST.NET - smtp.machra.cz

Search for IP or hostnames:

smtp.machra.cz checked at 2025-11-10T12:49:52.286Z 196ms 25/25/25 100% R:14 allDone:true timedOut:false

smtp.machra.cz

A81.91.87.11🇨🇿 WEB4U
PTRsmtp.web4u.cz

machra.cz

NSns2.web4u.cz
NSns.web4u.cz
MXmx1.mailchannels.net
MXmx2.mailchannels.net
A81.91.86.12🇨🇿 WEB4U

Starts with same word

Starts similarily

AI analysis

smtp.machra.cz points to a single IP: 81.91.87.11.

Other host names, for instance smtp.web4u.cz, smtp4u.atas.cz, smtp.bayercropscience.cz, smtp.jgolem.cz and smtp.year2100.eu share IP numbers with smtp.machra.cz.

Perform reverse DNS lookup as well as normal forward DNS. Check Autonomous System Numbers (ASNs) and BGP connections between Internet Service Providers.
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