java-course.ru - dns.ninja

`java-course.ru`

DNSSEC	⚠️ Not signed
A	37.230.118.213^{🇷🇺 RU-JSCIOT37.230.118.0/23}
		PTR	`lake.multihost.cloud`
NS	`ns1.multihost.ru` ⭐
		A	82.202.173.207^{🇷🇺 RU-JSCIOT82.202.172.0/23}
			PTR	`ns1.multihost.ru`
NS	`ns2.multihost.ru`
		A	188.120.255.7^{🇷🇺 RU-JSCIOT188.120.254.0/23}
			PTR	`ns2.multihost.ru`
NS	`ns3.multihost.ru` ⚠️ Not in parent delegation
		A	188.120.255.7^{🇷🇺 RU-JSCIOT188.120.254.0/23}
			PTR	`ns2.multihost.ru`
MX	`java-course.ru` ⭐
		A	37.230.118.213^{🇷🇺 RU-JSCIOT37.230.118.0/23}
			PTR	`lake.multihost.cloud`
TXT	`v=spf1 ip4:37.230.118.213 ip4:37.230.118.162 ip4:37.230.118.162 ip4:185.42.12...`
SOA	`ns1.multihost.ru`root@lake.multihost.cloud 2026-07-06 #0

`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=4069576

WOT: UNKNOWN (63/100)

MX for

java-course.ru

Same first word

java-course.ru

Similar names

java-source.net

java-source.com

DNS History

6 records (5 active, 1 former)

●NSns1.multihost.ru2015-07-25 → 2026-07-11 · 2 obs

● 2015-07-25 10:45:32
● 2026-07-11 15:25:46

●NSns2.multihost.ru2015-07-25 → 2026-07-11 · 2 obs

● 2015-07-25 10:45:32
● 2026-07-11 15:25:46

●NSns3.multihost.ru2026-02-24 → 2026-07-11 · 3 obs

○ 2015-07-25 10:45:32
● 2026-02-24 04:57:46
● 2026-07-11 15:25:46

●MXjava-course.ru2015-07-25 → 2026-07-11 · 2 obs

● 2015-07-25 10:45:32
● 2026-07-11 15:25:46

○A185.42.12.162015-07-25 → 2017-04-04 · 4 obs

● 2015-07-25 10:45:32
● 2017-04-04 19:44:40
○ 2026-02-24 04:57:46
○ 2026-07-11 15:25:46

●A37.230.118.2132026-02-24 → 2026-07-11 · 3 obs

○ 2017-04-04 19:44:40
● 2026-02-24 04:57:46
● 2026-07-11 15:25:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
ru	a.dns.ripn.net, b.dns.ripn.net, d.dns.ripn.net, e.dns.ripn.net...	-
java-course.ru	ns2.multihost.ru, ns1.multihost.ru	2 records

✅ Authoritative Response

Server:82.202.173.207

NS records: ns2.multihost.ru, ns1.multihost.ru

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for java-course.ru (unsigned zone)

⏱️ Timing

Total: 929ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`37.230.118.213`
NS	3	`ns1.multihost.ru, ns2.multihost.ru...`
MX	1	`java-course.ru (pri: 0)`
TXT	1	`v=spf1 ip4:37.230.118.213 ip4:37.230.118`
SOA	1	`ns1.multihost.ru root.lake.multihost.clo`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns2.multihost.ru, ns1.multihost.ru)

Analysis

Mail Server Role

java-course.ru serves as a mail server for java-course.ru.

IP Addresses

java-course.ru has exactly one IP address — 37.230.118.213.

pogtehsnab.ru, isg-l.ru, kandrykul.ru plus two other host names have IP numbers in common with java-course.ru.

Name Servers

Three name servers are authoritative for java-course.ru: ns1.multihost.ru, ns2.multihost.ru and ns3.multihost.ru.

There is at least partial name server overlap between java-course.ru and other domains — r-ma.ru, culturerf.ru, delif.ru and two more among them.

ns1.multihost.ru resolves to 82.202.173.207. Notably, ns2.multihost.ru and ns3.multihost.ru share the same IP address, 188.120.255.7.

These two host names — ns2.multihost.ru and ns3.multihost.ru — each point to 188.120.255.7 IP addresses.

Mail Servers

java-course.ru uses exactly one mail server, which is java-course.ru.

There is one IP number for java-course.ru: 37.230.118.213.