probabilitycourse.org - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`probabilitycourse.org`

DNSSEC	⚠️ Not signed
A	216.239.136.99^{🇺🇸 Omnis216.239.136.0/21 Network, LLC}
NS	`ns1.jethostns.com` ⭐
		A	2a0e:acc0:1::cafe:cafe:ca20^{🇨🇿 WEDOS-GLOBAL2a0e:acc0:1::/48}
			PTR	`ns1.jethostns.com`
		A	45.138.106.20^{🇨🇿 WEDOS-GLOBAL45.138.106.0/24 WEDOS Global}
			PTR	`ns1.jethostns.com`
NS	`ns2.jethostns.com`
		A	2a0e:acc0:2::b:1:b20^{🇨🇿 WEDOS-GLOBAL2a0e:acc0:2::/48}
			PTR	`ns2.jethostns.com`
		A	185.8.238.20^{🇨🇿 WEDOS-GLOBAL185.8.238.0/24 WEDOS Global}
			PTR	`ns2.jethostns.com`
NS	`ns3.jethostns.com`
		A	2a0e:acc0:1::cafe:cafe:ca21^{🇨🇿 WEDOS-GLOBAL2a0e:acc0:1::/48}
			PTR	`ns3.jethostns.com`
		A	45.138.106.21^{🇨🇿 WEDOS-GLOBAL45.138.106.0/24 WEDOS Global}
			PTR	`ns3.jethostns.com`
NS	`ns4.jethostns.com`
		A	2a0e:acc0:2::b:1:b21^{🇨🇿 WEDOS-GLOBAL2a0e:acc0:2::/48}
			PTR	`ns4.jethostns.com`
		A	185.8.238.21^{🇨🇿 WEDOS-GLOBAL185.8.238.0/24 WEDOS Global}
			PTR	`ns4.jethostns.com`
SOA	`ns1.jethostns.com`wedos@wedos.com 2026-07-30 #2

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1786916662

Same first word

probabilitycourse.com

probabilitycourse.org

DNS History

12 records (5 active, 7 former)

●NSns1.jethostns.com2026-08-16 → 2026-08-16 · 2 obs

○ 2026-07-04 12:59:16
● 2026-08-16 22:07:26

○NSns1.omnis.com2015-07-18 → 2020-02-23 · 3 obs

● 2015-07-18 21:10:34
● 2020-02-23 18:22:04
○ 2026-08-16 22:07:26

●NSns2.jethostns.com2026-08-16 → 2026-08-16 · 2 obs

○ 2026-07-04 12:59:16
● 2026-08-16 22:07:26

○NSns2.omnis.com2015-07-18 → 2020-02-23 · 3 obs

● 2015-07-18 21:10:34
● 2020-02-23 18:22:04
○ 2026-08-16 22:07:26

●NSns3.jethostns.com2026-08-16 → 2026-08-16 · 2 obs

○ 2026-07-04 12:59:16
● 2026-08-16 22:07:26

○NSns3.omnis.com2015-07-18 → 2020-02-23 · 3 obs

● 2015-07-18 21:10:34
● 2020-02-23 18:22:04
○ 2026-08-16 22:07:26

●NSns4.jethostns.com2026-08-16 → 2026-08-16 · 2 obs

○ 2026-07-04 12:59:16
● 2026-08-16 22:07:26

○NSorigin.onlydns.com2026-07-04 → 2026-07-04 · 3 obs

○ 2026-04-05 21:41:56
● 2026-07-04 12:59:16
○ 2026-08-16 22:07:26

○NSprimary.guardeddns.net2015-07-18 → 2026-04-05 · 4 obs

● 2015-07-18 21:10:34
● 2026-04-05 21:41:56
○ 2026-07-04 12:59:16
○ 2026-08-16 22:07:26

○A216.239.128.702015-07-18 → 2015-07-18 · 3 obs

● 2015-07-18 21:10:34
○ 2015-11-24 13:32:36
○ 2026-08-16 22:07:26

○A216.239.130.2202015-11-24 → 2017-02-11 · 5 obs

○ 2015-07-18 21:10:34
● 2015-11-24 13:32:36
● 2017-02-11 18:12:20
○ 2020-02-23 18:22:04
○ 2026-08-16 22:07:26

●A216.239.136.992020-02-23 → 2026-08-16 · 3 obs

○ 2017-02-11 18:12:20
● 2020-02-23 18:22:04
● 2026-08-16 22:07:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
probabilitycourse.org	ns3.jethostns.com, ns4.jethostns.com, ns1.jethostns.com, ns2.jethostns.com	-

✅ Authoritative Response

Server:45.138.106.21

NS records: ns3.jethostns.com, ns4.jethostns.com, ns1.jethostns.com, ns2.jethostns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for probabilitycourse.org (unsigned zone)

⏱️ Timing

Total: 339ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`216.239.136.99`
NS	4	`ns1.jethostns.com, ns2.jethostns.com...`
SOA	1	`ns1.jethostns.com wedos.wedos.com`

Analysis

IP Addresses

probabilitycourse.org directs to one IP number, which is 216.239.136.99.

Among the host names that share IP numbers with probabilitycourse.org are dvw2.com, lulucrm.com, chloeanya.com and two others.

Name Servers

The domain probabilitycourse.org is delegated to these four name servers: ns1.jethostns.com, ns2.jethostns.com, ns3.jethostns.com and ns4.jethostns.com.

The name servers of probabilitycourse.org overlap at least partially with those of other domains — among them palio.co, kleinnco.com, glenys.com and two more.

These name servers commonly appear in delegations together with ns1.omnis.com, ns2.omnis.com, ns1.guardedhost.com and 6 other.

Each of the four hosts ns1.jethostns.com, ns2.jethostns.com, ns3.jethostns.com and ns4.jethostns.com has two IP addresses. ns1.jethostns.com points to 45.138.106.20 and 2a0e:acc0:1::cafe:cafe:ca20. ns2.jethostns.com points to 185.8.238.20 and 2a0e:acc0:2::b:1:b20. ns3.jethostns.com points to 45.138.106.21 and 2a0e:acc0:1::cafe:cafe:ca21. ns4.jethostns.com points to 185.8.238.21 and 2a0e:acc0:2::b:1:b21.