`knowledgecheck.ru`

DNSSEC	⚠️ Not signed
A	46.182.29.27^{🇷🇺 SELECTEL46.182.29.0/24 -NET}
		PTR	`knowledgecheck.ru`
NS	`a.namesrv.ru` ⭐
		A	212.57.115.158^{🇷🇺 RU-JSCIOT212.57.115.0/24}
			PTR	`a.namesrv.ru`
NS	`b.namesrv.ru`
		A	95.213.140.230^{🇷🇺 SELECTEL95.213.140.0/24 -NET}
			PTR	`b.namesrv.ru`
NS	`c.namesrv.ru`
		A	212.132.104.168^{🇬🇧 IONOS-AS212.132.96.0/19 IONOS SE ber.de}
			PTR	`c.namesrv.ru`
NS	`d.namesrv.ru`
		A	159.253.20.43^{🇪🇪 PAGM-AS159.253.20.0/24 PAGM routed network}
			PTR	`d.namesrv.ru`
MX	`mail.knowledgecheck.ru` ⭐
		A	46.182.29.27^{🇷🇺 SELECTEL46.182.29.0/24 -NET}
			PTR	`knowledgecheck.ru`
MX	`mail.knowledgecheck.ru`⁽²⁰⁾
		A	46.182.29.27^{🇷🇺 SELECTEL46.182.29.0/24 -NET}
			PTR	`knowledgecheck.ru`
TXT	`v=spf1 ip4:46.182.29.16/28 ip4:95.213.140.224/28 ip4:95.213.150.104/29 ip4:95...`
SOA	`a.namesrv.ru`hostmaster@namesrv.ru 2026-03-05 #75

`ru`

	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=4068653

PTR for

27.29.182.46.in-addr.arpa

Previously MX for

xn----7sbbfpoiid7abdmod.xn--p1ai

Subdomains

mail.knowledgecheck.ru

Same first word

knowledgecheck.ru

Similar names

checkknowledge.com

DNS History

10 records (6 active, 4 former)

●NSa.namesrv.ru2026-04-26 → 2026-04-26 · 3 obs

○ 2019-12-20 10:26:18
● 2026-04-26 09:03:48
● 2026-04-26 09:03:52

●NSb.namesrv.ru2026-04-26 → 2026-04-26 · 3 obs

○ 2019-12-20 10:26:18
● 2026-04-26 09:03:48
● 2026-04-26 09:03:52

●NSc.namesrv.ru2026-04-26 → 2026-04-26 · 3 obs

○ 2019-12-20 10:26:18
● 2026-04-26 09:03:48
● 2026-04-26 09:03:52

●NSd.namesrv.ru2026-04-26 → 2026-04-26 · 3 obs

○ 2019-12-20 10:26:18
● 2026-04-26 09:03:48
● 2026-04-26 09:03:52

○NSns1.edupublisher.ru2019-12-20 → 2019-12-20 · 3 obs

● 2019-12-20 10:26:18
○ 2026-04-26 09:03:48
○ 2026-04-26 09:03:52

○NSns2.edupublisher.ru2019-12-20 → 2019-12-20 · 3 obs

● 2019-12-20 10:26:18
○ 2026-04-26 09:03:48
○ 2026-04-26 09:03:52

○MXedupublisher.ru2019-12-20 → 2019-12-20 · 3 obs

● 2019-12-20 10:26:18
○ 2026-04-26 09:03:48
○ 2026-04-26 09:03:52

○MXknowledgecheck.ru2019-12-20 → 2019-12-20 · 3 obs

● 2019-12-20 10:26:18
○ 2026-04-26 09:03:48
○ 2026-04-26 09:03:52

●MXmail.knowledgecheck.ru2026-04-26 → 2026-04-26 · 3 obs

○ 2019-12-20 10:26:18
● 2026-04-26 09:03:48
● 2026-04-26 09:03:52

●A46.182.29.272019-12-20 → 2026-04-26 · 2 obs

● 2019-12-20 10:26:18
● 2026-04-26 09:03:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
ru	a.dns.ripn.net, b.dns.ripn.net, d.dns.ripn.net, e.dns.ripn.net...	-
knowledgecheck.ru	c.namesrv.ru, a.namesrv.ru, b.namesrv.ru, d.namesrv.ru	4 records

✅ Authoritative Response

Server:212.57.115.158

NS records: c.namesrv.ru, a.namesrv.ru, b.namesrv.ru, d.namesrv.ru

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knowledgecheck.ru (unsigned zone)

⏱️ Timing

Total: 854ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`46.182.29.27`
NS	4	`c.namesrv.ru, b.namesrv.ru...`
MX	2	`mail.knowledgecheck.ru (pri: 20), mail.knowledgecheck.ru (pri: 10)`
TXT	1	`v=spf1 ip4:46.182.29.16/28 ip4:95.213.14`
SOA	1	`a.namesrv.ru hostmaster.namesrv.ru`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (d.namesrv.ru, c.namesrv.ru, b.namesrv.ru...)

Analysis

Hierarchy

knowledgecheck.ru is the parent of mail.knowledgecheck.ru.

IP Addresses

knowledgecheck.ru points to a single IP number: 46.182.29.27.

Other host names, for instance mail.knowledgecheck.ru, xn----7sbbfpoiid7abdmod.xn--p1ai and www.xn----7sbbfpoiid7abdmod.xn--p1ai share IP numbers with knowledgecheck.ru.

Name Servers

knowledgecheck.ru is delegated to four name servers: a.namesrv.ru, b.namesrv.ru, c.namesrv.ru and d.namesrv.ru.

knowledgecheck.ru at least partially shares name servers with other domains, for instance onlineoffice.ru, fgoscheck.ru, kiddysteps.ru, knowitall.ru and edupublisher.ru.

These name servers are commonly used with the name servers ns1.aclyx.net.

Host names with one IP number:

a.namesrv.ru points to 212.57.115.158

b.namesrv.ru points to 95.213.140.230

c.namesrv.ru points to 212.132.104.168

d.namesrv.ru points to 159.253.20.43

Mail Servers

knowledgecheck.ru is handled by two mail servers mail.knowledgecheck.ru and mail.knowledgecheck.ru.

Host names with one IP number: mail.knowledgecheck.ru points to: 46.182.29.27.

knowledgecheck.ru - robtex.com