`courselink.net`

DNSSEC	⚠️ Not signed
A	2606:4700:3035::6815:2b4b^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:de8e^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.43.75^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.222.142^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`ashley.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a47^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ashley.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c047^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ashley.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2047^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ashley.ns.cloudflare.com`
		A	108.162.192.71^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ashley.ns.cloudflare.com`
		A	172.64.32.71^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ashley.ns.cloudflare.com`
		A	173.245.58.71^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ashley.ns.cloudflare.com`
NS	`ray.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b8a^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ray.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c18a^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ray.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:218a^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ray.ns.cloudflare.com`
		A	108.162.193.138^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ray.ns.cloudflare.com`
		A	172.64.33.138^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ray.ns.cloudflare.com`
		A	173.245.59.138^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ray.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.43.75, 172.67.222.142
		IPv6 hints	2606:4700:3035::6815:2b4b, 2606:4700:3035::ac43:de8e
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=93, name=cloudflare-ech.com
SOA	`ashley.ns.cloudflare.com`dns@cloudflare.com serial=2400829672

`net`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1775363557

Same first word

courselink.app

courselink.net

courselink.io

courselink.com

Similar names

DNS History

13 records (6 active, 7 former)

●NSashley.ns.cloudflare.com2026-03-26 → 2026-04-05 · 3 obs

○ 2018-09-01 13:50:14
● 2026-03-26 06:20:42
● 2026-04-05 04:56:18

○NSns13.domaincontrol.com2015-06-20 → 2016-05-05 · 4 obs

● 2015-06-20 14:07:04
● 2016-05-05 10:32:22
○ 2017-01-16 20:58:46
○ 2026-04-05 04:56:18

○NSns14.domaincontrol.com2015-06-20 → 2016-05-05 · 4 obs

● 2015-06-20 14:07:04
● 2016-05-05 10:32:22
○ 2017-01-16 20:58:46
○ 2026-04-05 04:56:18

●NSray.ns.cloudflare.com2026-03-26 → 2026-04-05 · 3 obs

○ 2018-09-01 13:50:14
● 2026-03-26 06:20:42
● 2026-04-05 04:56:18

○NSvip1.alidns.com2018-09-01 → 2018-09-01 · 4 obs

○ 2017-01-16 20:58:46
● 2018-09-01 13:50:14
○ 2026-03-26 06:20:42
○ 2026-04-05 04:56:18

○NSvip2.alidns.com2018-09-01 → 2018-09-01 · 4 obs

○ 2017-01-16 20:58:46
● 2018-09-01 13:50:14
○ 2026-03-26 06:20:42
○ 2026-04-05 04:56:18

○MXmailstore1.secureserver.net2015-06-20 → 2016-05-05 · 4 obs

● 2015-06-20 14:07:04
● 2016-05-05 10:32:22
○ 2017-01-16 20:58:46
○ 2026-04-05 04:56:18

○MXsmtp.secureserver.net2015-06-20 → 2016-05-05 · 4 obs

● 2015-06-20 14:07:04
● 2016-05-05 10:32:22
○ 2017-01-16 20:58:46
○ 2026-04-05 04:56:18

●A104.21.43.752026-03-26 → 2026-04-05 · 3 obs

○ 2017-01-16 20:58:46
● 2026-03-26 06:20:42
● 2026-04-05 04:56:18

●A172.67.222.1422026-03-26 → 2026-04-05 · 3 obs

○ 2017-01-16 20:58:46
● 2026-03-26 06:20:42
● 2026-04-05 04:56:18

●A2606:4700:3035::6815:2b4b2026-03-26 → 2026-04-05 · 3 obs

○ 2017-01-16 20:58:46
● 2026-03-26 06:20:42
● 2026-04-05 04:56:18

●A2606:4700:3035::ac43:de8e2026-03-26 → 2026-04-05 · 3 obs

○ 2017-01-16 20:58:46
● 2026-03-26 06:20:42
● 2026-04-05 04:56:18

○A50.63.202.622015-06-20 → 2016-05-05 · 4 obs

● 2015-06-20 14:07:04
● 2016-05-05 10:32:22
○ 2017-01-16 20:58:46
○ 2026-04-05 04:56:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	g.gtld-servers.net, i.gtld-servers.net, h.gtld-servers.net, a.gtld-servers.net...	-
courselink.net	ray.ns.cloudflare.com, ashley.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.138

NS records: ray.ns.cloudflare.com, ashley.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for courselink.net (unsigned zone)

⏱️ Timing

Total: 439ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.222.142, 104.21.43.75`
AAAA	2	`2606:4700:3035::6815:2b4b, 2606:4700:3035::ac43:de8e`
NS	2	`ashley.ns.cloudflare.com, ray.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`ashley.ns.cloudflare.com dns.cloudflare.`

Analysis

IP Addresses

courselink.net maps to four IP numbers: 2606:4700:3035::6815:2b4b, 2606:4700:3035::ac43:de8e, 104.21.43.75 and 172.67.222.142.

Other host names, for instance leix.com.cn, nhtfw.com, ingatlanmenedzser.hu, christianarticons.com and i24slot.org share IP numbers with courselink.net.

Name Servers

Two name servers ashley.ns.cloudflare.com and ray.ns.cloudflare.com handle delegation for courselink.net.

courselink.net uses the same name server setup as other domains, for example datagrapevine.com, telect.com, nodex.co.uk, znamenitka.ru and clarion.info.

courselink.net partially shares name servers with other domains; examples include rositacetina.com, 18598.cn, chinta.web.id, arabic-text.com and uralkras.ru.

These name servers commonly accompany lina.ns.cloudflare.com, henrik.ns.cloudflare.com, marjory.ns.cloudflare.com and brodie.ns.cloudflare.com.

Host names with six IP numbers: ashley.ns.cloudflare.com points to: 2606:4700:50::adf5:3a47, 2803:f800:50::6ca2:c047, 2a06:98c1:50::ac40:2047, 108.162.192.71, 172.64.32.71 and 173.245.58.71; ray.ns.cloudflare.com points to: 2606:4700:58::adf5:3b8a, 2803:f800:50::6ca2:c18a, 2a06:98c1:50::ac40:218a, 108.162.193.138, 172.64.33.138 and 173.245.59.138.

courselink.net - robtex.com

courselink.net

net

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

`courselink.net`

`net`