knowledge.su - dns.ninja

`knowledge.su`

DNSSEC	⚠️ Not signed
A	81.90.180.86^{🇷🇺 SELECTEL-MSK81.90.180.0/22}
		PTR	`ruvip66-acdafae.hostiman.com`
NS	`ruvip66.hostiman.ru` ⭐
		A	81.90.180.54^{🇷🇺 SELECTEL-MSK81.90.180.0/22}
			PTR	`ruvip66.hostiman.ru`
NS	`ns1.hostiman.ru`
		A	81.90.180.66^{🇷🇺 SELECTEL-MSK81.90.180.0/22}
			PTR	`ns1.hostiman.ru`
NS	`ns2.hostiman.ru`
		A	188.68.220.162^{🇷🇺 SELECTEL188.68.220.0/22 Selectel Route Object}
			PTR	`ns2.hostiman.ru`
NS	`ns3.hostiman.ru`
		A	81.90.180.68^{🇷🇺 SELECTEL-MSK81.90.180.0/22}
			PTR	`ns3.hostiman.ru`
NS	`ns4.hostiman.ru`
		A	62.217.180.16^{🇷🇺 BEGET-AS62.217.180.0/24 BEGET.RU}
			PTR	`ns4.hostiman.ru`
MX	`mail.knowledge.su`⁽²⁰⁾
		A	81.90.180.86^{🇷🇺 SELECTEL-MSK81.90.180.0/22}
			PTR	`ruvip66-acdafae.hostiman.com`
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

`su`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.dns.ripn.net` ⭐
	NS	`b.dns.ripn.net`
	NS	`d.dns.ripn.net`
	NS	`e.dns.ripn.net`
	NS	`f.dns.ripn.net`
	SOA	`a.dns.ripn.net`hostmaster@ripn.net serial=650209407

WOT: UNKNOWN (69/100)

Subdomains

mail.knowledge.su

Same first word

knowledge.ru

knowledge.ch

knowledge.io

knowledge.money

knowledge.co.uk

knowledge.systems

knowledge.works

knowledge.productions

knowledge.chat

knowledge.center

knowledge.com.kw

knowledge.network

knowledge.university

knowledge.builders

knowledge.de

knowledge.info

knowledge.academy

knowledge.asia

knowledge.lv

knowledge.ly

knowledge.com.in

knowledge.wine

knowledge.wiki

knowledge.net.nz

knowledge.or.kr

knowledge.org.uk

knowledge.ne.jp

knowledge.kr

knowledge.no-ip.org

knowledge.agency

knowledge.buzz

knowledge.cn.com

knowledge.co.th

knowledge.be

knowledge.com

knowledge.org

knowledge.kz

knowledge.ie

knowledge.net

knowledge.com.br

knowledge.tank.jp

knowledge.company

knowledge.pl

knowledge.pk

knowledge.community

knowledge.kitchen

knowledge.li

knowledge.at

knowledge.la

knowledge.org.ua

knowledge.it

knowledge.gr

knowledge.edu.krd

knowledge.tech

knowledge.ee

knowledge.enterprises

knowledge.tv

knowledge.edu.pl

knowledge.city

knowledge.org.tw

knowledge.cz

knowledge.bio

knowledge.life

knowledge.no

knowledge.cards

knowledge.cafe

knowledge.services

knowledge.homes

knowledge.store

knowledge.de.com

knowledge.capital

knowledge.com.pa

knowledge.su

knowledge.ca

Similar names

knowlegde.com

kwonglede.com

ledgeknow.com

degenkolw.dk

knolwedge.com

egdelwonk.com

DNS History

10 records (7 active, 3 former)

●NSns1.hostiman.ru2026-03-24 → 2026-06-09 · 3 obs

○ 2016-12-05 01:13:30
● 2026-03-24 15:49:12
● 2026-06-09 02:12:00

●NSns2.hostiman.ru2026-03-24 → 2026-06-09 · 3 obs

○ 2016-12-05 01:13:30
● 2026-03-24 15:49:12
● 2026-06-09 02:12:00

●NSns3.hostiman.ru2026-03-24 → 2026-06-09 · 3 obs

○ 2016-12-05 01:13:30
● 2026-03-24 15:49:12
● 2026-06-09 02:12:00

●NSns4.hostiman.ru2026-03-24 → 2026-06-09 · 3 obs

○ 2016-12-05 01:13:30
● 2026-03-24 15:49:12
● 2026-06-09 02:12:00

○NSns65.hostlife.net2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:13:30
○ 2026-03-24 15:49:12
○ 2026-06-09 02:12:00

○NSns66.hostlife.net2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:13:30
○ 2026-03-24 15:49:12
○ 2026-06-09 02:12:00

●NSruvip66.hostiman.ru2026-03-24 → 2026-06-09 · 3 obs

○ 2016-12-05 01:13:30
● 2026-03-24 15:49:12
● 2026-06-09 02:12:00

●MXmail.knowledge.su2016-12-05 → 2026-06-09 · 2 obs

● 2016-12-05 01:13:30
● 2026-06-09 02:12:00

○A185.74.252.92016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:13:30
○ 2026-03-24 15:49:12
○ 2026-06-09 02:12:00

●A81.90.180.862026-03-24 → 2026-06-09 · 3 obs

○ 2016-12-05 01:13:30
● 2026-03-24 15:49:12
● 2026-06-09 02:12:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
su	e.dns.ripn.net, a.dns.ripn.net, f.dns.ripn.net, b.dns.ripn.net...	10 records
knowledge.su	ns1.hostiman.ru, ns2.hostiman.ru, ns3.hostiman.ru, ns4.hostiman.ru	-

✅ Authoritative Response

Server:81.90.180.66

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: 1054ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.90.180.86`
NS	4	`ns3.hostiman.ru, ns2.hostiman.ru...`
MX	2	`mail.knowledge.su (pri: 10), mail.knowledge.su (pri: 20)`
TXT	1	`v=spf1 ip4:81.90.180.54 ip4:81.90.180.86`
SOA	1	`ruvip66.hostiman.ru dnsmanager.hostiman.`

📌 Glue Records Collected

Total: 10

Out-of-bailiwick: 10 (f.dns.ripn.net, e.dns.ripn.net, d.dns.ripn.net...)

Analysis

Hierarchy

knowledge.su serves as the parent of mail.knowledge.su.

IP Addresses

knowledge.su has exactly one IP address — 81.90.180.86.

www.gofrotrek.ru, winterlife.ru, www.ikea-dv.ru plus two other host names have IP numbers in common with knowledge.su.

Name Servers

DNS delegation for knowledge.su uses 5 name servers, including ns1.hostiman.ru, ns2.hostiman.ru, ns3.hostiman.ru and two others.

knowledge.su has at least partial name server overlap with other domains, such as bessrebrenik.ru, remont-ot-zheni.ru, goldfishotel.ru and two others.

These name servers tend to appear in conjunction with ns4.hostiman.ru, ruvip66.hostiman.ru, ns3.hostiman.com and seven others.

Host names with one IP number:

ns1.hostiman.ru points to the IP address 81.90.180.66.

ns2.hostiman.ru points to the IP address 188.68.220.162.

ns3.hostiman.ru points to the IP address 81.90.180.68.

ns4.hostiman.ru points to the IP address 62.217.180.16.

ruvip66.hostiman.ru points to the IP address 81.90.180.54.

Mail Servers

knowledge.su uses one mail server — mail.knowledge.su.

There is one IP number for mail.knowledge.su: 81.90.180.86.