`webcours.co`

DNSSEC	⚠️ Not signed
A	2606:4700:3036::6815:5f87^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:90fd^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.95.135^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.144.253^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`elliott.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2ce4^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elliott.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3e4^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`elliott.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23e4^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`elliott.ns.cloudflare.com`
		A	108.162.195.228^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elliott.ns.cloudflare.com`
		A	162.159.44.228^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elliott.ns.cloudflare.com`
		A	172.64.35.228^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elliott.ns.cloudflare.com`
NS	`rayne.ns.cloudflare.com`
		A	2606:4700:50::a29f:260b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rayne.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c20b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`rayne.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:220b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`rayne.ns.cloudflare.com`
		A	108.162.194.11^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rayne.ns.cloudflare.com`
		A	162.159.38.11^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rayne.ns.cloudflare.com`
		A	172.64.34.11^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rayne.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.95.135, 172.67.144.253
		IPv6 hints	2606:4700:3036::6815:5f87, 2606:4700:3036::ac43:90fd
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=64, name=cloudflare-ech.com
SOA	`elliott.ns.cloudflare.com`dns@cloudflare.com serial=2410737553

`co`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns0.centralnic.net` ⭐
	NS	`a.registrydns.co`
	NS	`b.registrydns.co`
	NS	`c.registrydns.co`
	NS	`d.registrydns.co`
	SOA	`ns0.centralnic.net`hostmaster@centralnic.net serial=1759723821

Same first word

webcours.co

Similar names

coursweb.ch

webcurso.net

cursoweb.net

webcurso.es

DNS History

16 records (6 active, 10 former)

●NSelliott.ns.cloudflare.com2026-07-31 → 2026-08-03 · 3 obs

○ 2020-01-02 08:48:04
● 2026-07-31 10:57:48
● 2026-08-03 15:17:14

○NSns1.above.com2020-01-02 → 2020-01-02 · 4 obs

○ 2016-12-05 01:54:48
● 2020-01-02 08:48:04
○ 2026-07-31 10:57:48
○ 2026-08-03 15:17:14

○NSns2.above.com2020-01-02 → 2020-01-02 · 4 obs

○ 2016-12-05 01:54:48
● 2020-01-02 08:48:04
○ 2026-07-31 10:57:48
○ 2026-08-03 15:17:14

○NSns49.domaincontrol.com2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:54:48
○ 2020-01-02 08:48:04
○ 2026-08-03 15:17:14

○NSns50.domaincontrol.com2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:54:48
○ 2020-01-02 08:48:04
○ 2026-08-03 15:17:14

●NSrayne.ns.cloudflare.com2026-07-31 → 2026-08-03 · 3 obs

○ 2020-01-02 08:48:04
● 2026-07-31 10:57:48
● 2026-08-03 15:17:14

○MXpark-mx.above.com2020-01-02 → 2020-01-02 · 3 obs

● 2020-01-02 08:48:04
○ 2026-07-31 10:57:48
○ 2026-08-03 15:17:14

○A103.224.182.2532020-01-02 → 2020-01-02 · 4 obs

○ 2016-12-05 01:54:48
● 2020-01-02 08:48:04
○ 2026-07-31 10:57:48
○ 2026-08-03 15:17:14

●A104.21.95.1352026-07-31 → 2026-08-03 · 3 obs

○ 2020-01-02 08:48:04
● 2026-07-31 10:57:48
● 2026-08-03 15:17:14

●A172.67.144.2532026-07-31 → 2026-08-03 · 3 obs

○ 2020-01-02 08:48:04
● 2026-07-31 10:57:48
● 2026-08-03 15:17:14

○A216.239.32.212016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:54:48
○ 2020-01-02 08:48:04
○ 2026-08-03 15:17:14

○A216.239.34.212016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:54:48
○ 2020-01-02 08:48:04
○ 2026-08-03 15:17:14

○A216.239.36.212016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:54:48
○ 2020-01-02 08:48:04
○ 2026-08-03 15:17:14

○A216.239.38.212016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:54:48
○ 2020-01-02 08:48:04
○ 2026-08-03 15:17:14

●A2606:4700:3036::6815:5f872026-07-31 → 2026-08-03 · 3 obs

○ 2020-01-02 08:48:04
● 2026-07-31 10:57:48
● 2026-08-03 15:17:14

●A2606:4700:3036::ac43:90fd2026-07-31 → 2026-08-03 · 3 obs

○ 2020-01-02 08:48:04
● 2026-07-31 10:57:48
● 2026-08-03 15:17:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
co	a.registrydns.co, b.registrydns.co, c.registrydns.co, d.registrydns.co	-
webcours.co	rayne.ns.cloudflare.com, elliott.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.38.11

NS records: rayne.ns.cloudflare.com, elliott.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for webcours.co (unsigned zone)

⏱️ Timing

Total: 420ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.95.135, 172.67.144.253`
AAAA	2	`2606:4700:3036::6815:5f87, 2606:4700:3036::ac43:90fd`
NS	2	`elliott.ns.cloudflare.com, rayne.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`elliott.ns.cloudflare.com dns.cloudflare`

Analysis

IP Addresses

webcours.co has four IP addresses: 104.21.95.135, 172.67.144.253, 2606:4700:3036::6815:5f87 and 2606:4700:3036::ac43:90fd.

Among the host names that share IP numbers with webcours.co are www.sportgear.co.il.cdn.cloudflare.net, binhpro.com, clausthorhauge.dk and two others.

Name Servers

The NS records for webcours.co delegate to elliott.ns.cloudflare.com and rayne.ns.cloudflare.com.

webcours.co has the same name server delegation as a number of other domains, such as accessroosendaal.nl, adsscripts.nl, duhoceden.com and two more.

webcours.co shares at least some of its name servers with other domains, including whatchat.vip, maxsamasta.com, mediabox-net.com and two others.

These name servers are frequently seen alongside the name servers emma.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

elliott.ns.cloudflare.com maps to 108.162.195.228, 162.159.44.228, 172.64.35.228 and 3 additional IP addresses.

rayne.ns.cloudflare.com maps to 108.162.194.11, 162.159.38.11, 172.64.34.11 and 3 additional IP addresses.

webcours.co - robtex.com

webcours.co

co

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

`webcours.co`

`co`