coursetool.org - dns.ninja

`coursetool.org`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:8205^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:30d^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.3.13^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.130.5^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`aryanna.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:265f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`aryanna.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c25f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`aryanna.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:225f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`aryanna.ns.cloudflare.com`
		A	108.162.194.95^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`aryanna.ns.cloudflare.com`
		A	162.159.38.95^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`aryanna.ns.cloudflare.com`
		A	172.64.34.95^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`aryanna.ns.cloudflare.com`
NS	`vern.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bf3^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`vern.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1f3^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`vern.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21f3^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`vern.ns.cloudflare.com`
		A	108.162.193.243^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`vern.ns.cloudflare.com`
		A	172.64.33.243^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`vern.ns.cloudflare.com`
		A	173.245.59.243^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`vern.ns.cloudflare.com`
MX	`mx1.pub.mailpod11-cph3.one.com` ⭐
		A	104.37.34.230^{🇩🇰 ONECOM104.37.32.0/21 One.com A/S}
			PTR	`mx1.pub.mailpod11-cph3.one.com`
MX	`mx2.pub.mailpod11-cph3.one.com` ⭐
		A	104.37.34.231^{🇩🇰 ONECOM104.37.32.0/21 One.com A/S}
			PTR	`mx2.pub.mailpod11-cph3.one.com`
MX	`mx3.pub.mailpod11-cph3.one.com` ⭐
		A	104.37.34.232^{🇩🇰 ONECOM104.37.32.0/21 One.com A/S}
			PTR	`mx3.pub.mailpod11-cph3.one.com`
MX	`mx4.pub.mailpod11-cph3.one.com` ⭐
		A	104.37.34.233^{🇩🇰 ONECOM104.37.32.0/21 One.com A/S}
			PTR	`mx4.pub.mailpod11-cph3.one.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.3.13, 172.67.130.5
		IPv6 hints	2606:4700:3031::ac43:8205, 2606:4700:3035::6815:30d
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=178, name=cloudflare-ech.com
SOA	`aryanna.ns.cloudflare.com`dns@cloudflare.com serial=2410143437

`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=1784899257

Subdomains

www.coursetool.org

Same first word

coursetool.com

coursetool.org

Similar names

sourcetool.com

coeurtools.xyz

toolsource.cn

scooterlou.com

coolroutes.com.au

toolsource.com

toolsource.co.uk

DNS History

28 records (10 active, 18 former)

●NSaryanna.ns.cloudflare.com2026-04-21 → 2026-07-24 · 3 obs

○ 2021-04-06 06:17:40
● 2026-04-21 16:01:34
● 2026-07-24 13:46:42

○NSns01.one.com2026-04-21 → 2026-07-24 · 2 obs

○ 2026-04-21 16:01:34
○ 2026-07-24 13:46:42

○NSns02.one.com2026-04-21 → 2026-07-24 · 2 obs

○ 2026-04-21 16:01:34
○ 2026-07-24 13:46:42

○NSns1.gratisdns.dk2021-03-24 → 2021-04-06 · 5 obs

○ 2017-05-16 17:56:54
● 2021-03-24 17:54:58
● 2021-04-06 06:17:40
○ 2026-04-21 16:01:34
○ 2026-07-24 13:46:42

○NSns1.surf-town.net2015-05-13 → 2017-05-16 · 4 obs

● 2015-05-13 11:09:48
● 2017-05-16 17:56:54
○ 2021-03-24 17:54:58
○ 2026-07-24 13:46:42

○NSns2.gratisdns.dk2021-03-24 → 2021-04-06 · 5 obs

○ 2017-05-16 17:56:54
● 2021-03-24 17:54:58
● 2021-04-06 06:17:40
○ 2026-04-21 16:01:34
○ 2026-07-24 13:46:42

○NSns2.surf-town.net2015-05-13 → 2017-05-16 · 4 obs

● 2015-05-13 11:09:48
● 2017-05-16 17:56:54
○ 2021-03-24 17:54:58
○ 2026-07-24 13:46:42

○NSns3.gratisdns.dk2021-03-24 → 2021-04-06 · 5 obs

○ 2017-05-16 17:56:54
● 2021-03-24 17:54:58
● 2021-04-06 06:17:40
○ 2026-04-21 16:01:34
○ 2026-07-24 13:46:42

○NSns3.surf-town.net2015-05-13 → 2017-05-16 · 4 obs

● 2015-05-13 11:09:48
● 2017-05-16 17:56:54
○ 2021-03-24 17:54:58
○ 2026-07-24 13:46:42

○NSns4.gratisdns.dk2021-03-24 → 2021-04-06 · 5 obs

○ 2017-05-16 17:56:54
● 2021-03-24 17:54:58
● 2021-04-06 06:17:40
○ 2026-04-21 16:01:34
○ 2026-07-24 13:46:42

○NSns5.gratisdns.dk2021-03-24 → 2021-04-06 · 5 obs

○ 2017-05-16 17:56:54
● 2021-03-24 17:54:58
● 2021-04-06 06:17:40
○ 2026-04-21 16:01:34
○ 2026-07-24 13:46:42

●NSvern.ns.cloudflare.com2026-04-21 → 2026-07-24 · 3 obs

○ 2021-04-06 06:17:40
● 2026-04-21 16:01:34
● 2026-07-24 13:46:42

○MXmailb4.surftown.dk2015-05-13 → 2017-05-16 · 4 obs

● 2015-05-13 11:09:48
● 2017-05-16 17:56:54
○ 2021-03-24 17:54:58
○ 2026-07-24 13:46:42

●MXmx1.pub.mailpod11-cph3.one.com2026-04-21 → 2026-07-24 · 3 obs

○ 2021-03-24 17:54:58
● 2026-04-21 16:01:34
● 2026-07-24 13:46:42

●MXmx2.pub.mailpod11-cph3.one.com2026-04-21 → 2026-07-24 · 3 obs

○ 2021-03-24 17:54:58
● 2026-04-21 16:01:34
● 2026-07-24 13:46:42

●MXmx3.pub.mailpod11-cph3.one.com2026-04-21 → 2026-07-24 · 3 obs

○ 2021-03-24 17:54:58
● 2026-04-21 16:01:34
● 2026-07-24 13:46:42

●MXmx4.pub.mailpod11-cph3.one.com2026-04-21 → 2026-07-24 · 3 obs

○ 2021-03-24 17:54:58
● 2026-04-21 16:01:34
● 2026-07-24 13:46:42

●A104.21.3.132026-04-21 → 2026-07-24 · 3 obs

○ 2021-04-06 06:17:40
● 2026-04-21 16:01:34
● 2026-07-24 13:46:42

●A172.67.130.52026-04-21 → 2026-07-24 · 3 obs

○ 2021-04-06 06:17:40
● 2026-04-21 16:01:34
● 2026-07-24 13:46:42

○A212.97.132.2062015-05-13 → 2016-04-10 · 4 obs

● 2015-05-13 11:09:48
● 2016-04-10 05:14:44
○ 2016-09-26 02:17:04
○ 2026-07-24 13:46:42

○A212.97.135.1052016-09-26 → 2017-05-16 · 5 obs

○ 2016-04-10 05:14:44
● 2016-09-26 02:17:04
● 2017-05-16 17:56:54
○ 2021-03-24 17:54:58
○ 2026-07-24 13:46:42

○A2606:4700:3031::6815:30d2026-04-21 → 2026-05-24 · 7 obs

○ 2021-04-06 06:17:40
● 2026-04-21 16:01:34
○ 2026-04-29 18:37:02
● 2026-05-03 20:51:50
● 2026-05-24 16:03:00
○ 2026-07-03 12:14:48
○ 2026-07-24 13:46:42

●A2606:4700:3031::ac43:82052026-07-03 → 2026-07-24 · 3 obs

○ 2026-05-24 16:03:00
● 2026-07-03 12:14:48
● 2026-07-24 13:46:42

○A2606:4700:3033::ac43:82052026-04-21 → 2026-05-24 · 7 obs

○ 2021-04-06 06:17:40
● 2026-04-21 16:01:34
○ 2026-04-29 18:37:02
● 2026-05-03 20:51:50
● 2026-05-24 16:03:00
○ 2026-07-03 12:14:48
○ 2026-07-24 13:46:42

●A2606:4700:3035::6815:30d2026-07-03 → 2026-07-24 · 3 obs

○ 2026-05-24 16:03:00
● 2026-07-03 12:14:48
● 2026-07-24 13:46:42

○A2a06:98c1:3120::2026-04-29 → 2026-04-29 · 4 obs

○ 2026-04-21 16:01:34
● 2026-04-29 18:37:02
○ 2026-05-03 20:51:50
○ 2026-07-24 13:46:42

○A2a06:98c1:3121::2026-04-29 → 2026-04-29 · 4 obs

○ 2026-04-21 16:01:34
● 2026-04-29 18:37:02
○ 2026-05-03 20:51:50
○ 2026-07-24 13:46:42

○A89.188.76.1402021-03-24 → 2021-04-06 · 5 obs

○ 2017-05-16 17:56:54
● 2021-03-24 17:54:58
● 2021-04-06 06:17:40
○ 2026-04-21 16:01:34
○ 2026-07-24 13:46:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	d0.org.afilias-nst.org, b0.org.afilias-nst.org, b2.org.afilias-nst.org	-
coursetool.org	vern.ns.cloudflare.com, aryanna.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.243

NS records: vern.ns.cloudflare.com, aryanna.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coursetool.org (unsigned zone)

⏱️ Timing

Total: 499ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.130.5, 104.21.3.13`
AAAA	2	`2606:4700:3035::6815:30d, 2606:4700:3031::ac43:8205`
NS	2	`aryanna.ns.cloudflare.com, vern.ns.cloudflare.com`
MX	4	`mx1.pub.mailpod11-cph3.one.com (pri: 10), mx2.pub.mailpod11-cph3.one.com (pri: 10)...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`aryanna.ns.cloudflare.com dns.cloudflare`

Analysis

Hierarchy

The domain www.coursetool.org falls under the parent coursetool.org.

IP Addresses

coursetool.org points to the four IP addresses 104.21.3.13, 172.67.130.5, 2606:4700:3031::ac43:8205 and 2606:4700:3035::6815:30d.

muzica.life, heeae.com, www.sirotin.rs plus two other host names have IP numbers in common with coursetool.org.

Name Servers

coursetool.org is served by two delegated name servers, aryanna.ns.cloudflare.com and vern.ns.cloudflare.com.

The name server configuration of coursetool.org is shared with other domains, for instance chefcindy.com, otler.co.uk, pharmaoffer.com and two others.

At least some of coursetool.org's name servers are shared with other domains, for example bjsyf.net, ecowork.com, xevu.com and two more.

These name servers tend to be deployed in combination with the name servers dax.ns.cloudflare.com and derek.ns.cloudflare.com.

Hosts with 6 IP addresses each:

aryanna.ns.cloudflare.com carries IP addresses 108.162.194.95, 162.159.38.95 and 172.64.34.95, with 3 other addresses beyond those.

vern.ns.cloudflare.com carries IP addresses 108.162.193.243, 172.64.33.243 and 173.245.59.243, with 3 other addresses beyond those.

Mail Servers

The four mail servers for coursetool.org are mx1.pub.mailpod11-cph3.one.com, mx2.pub.mailpod11-cph3.one.com, mx3.pub.mailpod11-cph3.one.com and mx4.pub.mailpod11-cph3.one.com.

At least some of the mail servers used by coursetool.org are shared with other domains: learnlet.com, brygbrygbryg.dk, ns9.dk and two others among them.

Four host names, each with one IP address: mx1.pub.mailpod11-cph3.one.com has 104.37.34.230, mx2.pub.mailpod11-cph3.one.com has 104.37.34.231, mx3.pub.mailpod11-cph3.one.com has 104.37.34.232 and mx4.pub.mailpod11-cph3.one.com has 104.37.34.233.