`21school.ru`

DNSSEC	⚠️ Not signed
A	62.122.170.171^{🇺🇸 SERVEREL-AS62.122.168.0/21}
		PTR	`62.122.170.171.serverel.net`
NS	`ns1.snparking.ru` ⭐ ⚠️ Not in parent delegation
		A	37.221.193.103^{🇩🇪 netcup-AS37.221.192.0/22}
			PTR	`v22016063652435391.goodsrv.de`
		A	194.63.142.195^{🇷🇺 I-SERVERS-NORTH-EU194.63.142.0/24}
			PTR	`ns1.snparking.ru`
NS	`ns2.snparking.ru` ⚠️ Not in parent delegation
		A	5.45.106.252^{🇩🇪 netcup-AS5.45.104.0/22}
			PTR	`v22016113652440052.goodsrv.de`
		A	62.122.170.168^{🇺🇸 SERVEREL-AS62.122.168.0/21}
			PTR	`62.122.170.168.serverel.net`
NS	`ns3.salenames.ru` ⚠️ Not in zone NS records
		A	37.221.193.103^{🇩🇪 netcup-AS37.221.192.0/22}
			PTR	`v22016063652435391.goodsrv.de`
		A	194.63.142.195^{🇷🇺 I-SERVERS-NORTH-EU194.63.142.0/24}
			PTR	`ns1.snparking.ru`
NS	`ns4.salenames.ru` ⚠️ Not in zone NS records
		A	5.45.106.252^{🇩🇪 netcup-AS5.45.104.0/22}
			PTR	`v22016113652440052.goodsrv.de`
		A	62.122.170.168^{🇺🇸 SERVEREL-AS62.122.168.0/21}
			PTR	`62.122.170.168.serverel.net`
MX	`void.blackhole.mx` ⭐
		A	2a01:4f8:1c0c:54b0::2^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
		A	2a01:4f8:1c17:4376::2^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
		A	2a01:4f9:c010:2ce2::2^{🇫🇮 Hetzner2a01:4f9::/32 HETZNER-IPv6-BLK}
		A	78.47.159.103^{🇩🇪 Hetzner78.46.0.0/15 HETZNER-RZ-NBG-BLK5}
			PTR	`static.103.159.47.78.clients.your-server.de`
		A	95.217.0.12^{🇫🇮 Hetzner95.217.0.0/16 HETZNER-DC}
			PTR	`static.12.0.217.95.clients.your-server.de`
		A	195.201.28.161^{🇩🇪 Hetzner195.201.0.0/16 HETZNER-DC}
			PTR	`static.161.28.201.195.clients.your-server.de`
SOA	`ns1.snparking.ru`hostmaster@21school.ru 2022-03-30 #91

`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=4068147

Same first word

21school.com

Similar names

school12.edu.mn

school21.ru

school21.org.uk

school21.net

12school.com.ua

school12.km.ua

school21.org

school12.ru

12school.ru

school21.jp

school12.cn.ua

12school.com

school12.com

school12.com.ua

DNS History

13 records (6 active, 7 former)

●NSns1.snparking.ru2017-03-15 → 2026-03-20 · 3 obs

○ 2016-04-21 06:58:08
● 2017-03-15 15:04:38
● 2026-03-20 11:58:30

●NSns2.snparking.ru2017-03-15 → 2026-03-20 · 3 obs

○ 2016-04-21 06:58:08
● 2017-03-15 15:04:38
● 2026-03-20 11:58:30

●NSns3.salenames.ru2015-06-11 → 2026-03-20 · 5 obs

● 2015-06-11 06:41:48
● 2016-04-21 06:58:08
○ 2017-03-15 15:04:38
● 2026-03-20 11:58:28
● 2026-03-20 11:58:30

●NSns4.salenames.ru2015-06-11 → 2026-03-20 · 5 obs

● 2015-06-11 06:41:48
● 2016-04-21 06:58:08
○ 2017-03-15 15:04:38
● 2026-03-20 11:58:28
● 2026-03-20 11:58:30

○NSsnparking.com2017-03-15 → 2017-03-15 · 4 obs

○ 2016-04-21 06:58:08
● 2017-03-15 15:04:38
○ 2026-03-20 11:58:28
○ 2026-03-20 11:58:30

○MX148.240.4.322015-11-01 → 2015-11-01 · 4 obs

○ 2015-06-11 06:41:48
● 2015-11-01 04:51:44
○ 2016-01-22 22:41:22
○ 2026-03-20 11:58:30

○MX148.240.4.322015-06-11 → 2015-06-11 · 3 obs

● 2015-06-11 06:41:48
○ 2015-11-01 04:51:44
○ 2026-03-20 11:58:30

●MXvoid.blackhole.mx2016-01-22 → 2026-03-20 · 6 obs

○ 2015-11-01 04:51:44
● 2016-01-22 22:41:22
● 2016-04-21 06:58:08
○ 2017-03-15 15:04:38
● 2026-03-20 11:58:28
● 2026-03-20 11:58:30

○A109.206.190.542015-11-01 → 2015-11-01 · 4 obs

○ 2015-06-11 06:41:48
● 2015-11-01 04:51:44
○ 2016-01-22 22:41:22
○ 2026-03-20 11:58:30

○A185.53.179.402017-03-15 → 2017-03-15 · 4 obs

○ 2016-04-21 06:58:08
● 2017-03-15 15:04:38
○ 2026-03-20 11:58:28
○ 2026-03-20 11:58:30

○A192.237.187.2082016-01-22 → 2016-01-22 · 4 obs

○ 2015-11-01 04:51:44
● 2016-01-22 22:41:22
○ 2016-04-21 06:58:08
○ 2026-03-20 11:58:30

●A62.122.170.1712026-03-20 → 2026-03-20 · 3 obs

○ 2017-03-15 15:04:38
● 2026-03-20 11:58:28
● 2026-03-20 11:58:30

○A91.195.241.862015-06-11 → 2016-04-21 · 6 obs

● 2015-06-11 06:41:48
○ 2015-11-01 04:51:44
○ 2016-01-22 22:41:22
● 2016-04-21 06:58:08
○ 2017-03-15 15:04:38
○ 2026-03-20 11:58:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
ru	d.dns.ripn.net, f.dns.ripn.net, a.dns.ripn.net, b.dns.ripn.net...	-
21school.ru	ns4.salenames.ru, ns3.salenames.ru	-

✅ Authoritative Response

Server: 37.221.193.103

NS records: ns4.salenames.ru, ns3.salenames.ru

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21school.ru (unsigned zone)

⏱️ Timing

Total: 1107ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`62.122.170.171`
NS	2	`ns2.snparking.ru, ns1.snparking.ru`
MX	1	`void.blackhole.mx (pri: 0)`
SOA	1	`ns1.snparking.ru hostmaster.21school.ru`

Analysis

IP Addresses

21school.ru maps to IP address 62.122.170.171.

Other host names, for instance acse.ru, svini.ru, isopolin.ru, 148.240.4.32.vevo.ru and goodnow.ru share IP numbers with 21school.ru.

Name Servers

21school.ru is delegated to four name servers: ns3.salenames.ru, ns4.salenames.ru, ns1.snparking.ru and ns2.snparking.ru.

21school.ru at least partially shares name servers with other domains such as ngds.ru, intimcom.ru, tcse.ru, wekb.ru and i-bus.ru.

These name servers are commonly used with ns1.privateperson.ru and ns2.privateperson.ru.

Host names with two IPs

ns3.salenames.ru points to 37.221.193.103 and 194.63.142.195

ns4.salenames.ru points to 5.45.106.252 and 62.122.170.168

ns1.snparking.ru points to 37.221.193.103 and 194.63.142.195

ns2.snparking.ru points to 5.45.106.252 and 62.122.170.168

Host names that point to 37.221.193.103: ns3.salenames.ru and ns1.snparking.ru

Host names that point to 194.63.142.195: ns3.salenames.ru and ns1.snparking.ru

Host names that point to 5.45.106.252: ns4.salenames.ru and ns2.snparking.ru

Host names that point to 62.122.170.168: ns4.salenames.ru and ns2.snparking.ru

Mail Servers

21school.ru is handled by a single mail server, void.blackhole.mx.

21school.ru shares the same mail server setup as other domains, including volos.ru, mobtech.ru, tvkr.ru, kobot.ru and fulltv.ru.

void.blackhole.mx resolves to six IP numbers: 2a01:4f8:1c0c:54b0::2, 2a01:4f8:1c17:4376::2, 2a01:4f9:c010:2ce2::2, 78.47.159.103, 95.217.0.12 and 195.201.28.161.

21school.ru - robtex.com

21school.ru

ru