mail.knowledge.su - dns.ninja

`mail.knowledge.su`

DNSSEC	⚠️ Not signed
A	81.90.180.86^{🇷🇺 SELECTEL-MSK81.90.180.0/22}
		PTR	`ruvip66-acdafae.hostiman.com`

`knowledge.su`

	DNSSEC	⚠️ Not signed
	A	81.90.180.86^{🇷🇺 SELECTEL-MSK81.90.180.0/22}
	NS	`ruvip66.hostiman.ru` ⭐
	NS	`ns1.hostiman.ru`
	NS	`ns2.hostiman.ru`
	NS	`ns3.hostiman.ru`
	NS	`ns4.hostiman.ru`
	MX	`mail.knowledge.su`⁽²⁰⁾
	TXT	`v=spf1 ip4:81.90.180.54 ip4:81.90.180.86 a mx ~all`
	SOA	`ruvip66.hostiman.ru`dnsmanager@hostiman.ru 2025-06-02 #4

WOT: UNKNOWN (61/100)
WOT: UNKNOWN (69/100)

MX for

knowledge.su

Same first word

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mail.fm

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DNS History

1 record (1 active, 0 former)

●A81.90.180.862026-03-24 → 2026-07-29 · 2 obs

● 2026-03-24 15:49:12
● 2026-07-29 17:12:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
su	a.dns.ripn.net, d.dns.ripn.net, e.dns.ripn.net, b.dns.ripn.net...	12 records
knowledge.su	ns1.hostiman.ru, ns2.hostiman.ru, ns3.hostiman.ru, ns4.hostiman.ru	-

✅ Authoritative Response

Server:62.217.180.16

NS records: ns1.hostiman.ru, ns2.hostiman.ru, ns3.hostiman.ru, ns4.hostiman.ru

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knowledge.su (unsigned zone)

⏱️ Timing

Total: 1194ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.90.180.86`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (f.dns.ripn.net, e.dns.ripn.net, d.dns.ripn.net...)

Analysis

Mail Server Role

mail.knowledge.su serves as a mail server for knowledge.su.

IP Addresses

mail.knowledge.su points to a single IP number: 81.90.180.86.

Additional host names — xn----7sbgcn3ad0bkho0k.xn--p1ai, play4games.ru, thinkandrich.ru and two others — share IP numbers with mail.knowledge.su.