coursemarks.com - dns.ninja

`coursemarks.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:ac28^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:2fc5^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.47.197^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.172.40^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`charles.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b53^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`charles.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c153^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`charles.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2153^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`charles.ns.cloudflare.com`
		A	108.162.193.83^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`charles.ns.cloudflare.com`
		A	172.64.33.83^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`charles.ns.cloudflare.com`
		A	173.245.59.83^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`charles.ns.cloudflare.com`
NS	`hope.ns.cloudflare.com`
		A	2606:4700:50::adf5:3aa3^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hope.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0a3^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`hope.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20a3^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`hope.ns.cloudflare.com`
		A	108.162.192.163^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hope.ns.cloudflare.com`
		A	172.64.32.163^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hope.ns.cloudflare.com`
		A	173.245.58.163^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hope.ns.cloudflare.com`
MX	`route1.mx.cloudflare.net` ⭐
		A	2606:4700:f5::b^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::c^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::d^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.11^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.12^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.13^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
MX	`route3.mx.cloudflare.net`⁽⁵⁶⁾
		A	2606:4700:f5::11^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::12^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::13^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.23^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.24^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.25^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
MX	`route2.mx.cloudflare.net`⁽⁷⁷⁾
		A	2606:4700:f5::e^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::f^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::10^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.17^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.18^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.19^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
TXT	`google-site-verification=PPF_0PqdMwbg8-Dao0eioiJ2WCfY2oFqvpxrQSQmOCA`
TXT	`google-site-verification=x2agMm8YZ-wZ6g_H5yuX7l-97POhDm2XCWI4mNUv6uI`
TXT	`mc-domain-verification=0qs76yq2580ngq03wik6`
TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.47.197, 172.67.172.40
		IPv6 hints	2606:4700:3033::ac43:ac28, 2606:4700:3035::6815:2fc5
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=214, name=cloudflare-ech.com
SOA	`charles.ns.cloudflare.com`dns@cloudflare.com serial=2410818131

`com`

	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=1785633862

Subdomains

www.coursemarks.com

Same first word

coursemarks.com

Similar names

markcourses.bond

DNS History

11 records (9 active, 2 former)

●NScharles.ns.cloudflare.com2026-03-02 → 2026-08-02 · 2 obs

● 2026-03-02 23:56:50
● 2026-08-02 01:45:04

●NShope.ns.cloudflare.com2026-03-02 → 2026-08-02 · 2 obs

● 2026-03-02 23:56:50
● 2026-08-02 01:45:04

●MXroute1.mx.cloudflare.net2026-03-02 → 2026-08-02 · 2 obs

● 2026-03-02 23:56:50
● 2026-08-02 01:45:04

●MXroute2.mx.cloudflare.net2026-03-02 → 2026-08-02 · 2 obs

● 2026-03-02 23:56:50
● 2026-08-02 01:45:04

●MXroute3.mx.cloudflare.net2026-03-02 → 2026-08-02 · 2 obs

● 2026-03-02 23:56:50
● 2026-08-02 01:45:04

●A104.21.47.1972026-03-02 → 2026-08-02 · 2 obs

● 2026-03-02 23:56:50
● 2026-08-02 01:45:04

●A172.67.172.402026-03-02 → 2026-08-02 · 2 obs

● 2026-03-02 23:56:50
● 2026-08-02 01:45:04

●A2606:4700:3033::ac43:ac282026-07-02 → 2026-08-02 · 3 obs

○ 2026-06-15 19:46:14
● 2026-07-02 23:22:04
● 2026-08-02 01:45:04

○A2606:4700:3034::ac43:ac282026-03-02 → 2026-06-15 · 4 obs

● 2026-03-02 23:56:50
● 2026-06-15 19:46:14
○ 2026-07-02 23:22:04
○ 2026-08-02 01:45:04

●A2606:4700:3035::6815:2fc52026-07-02 → 2026-08-02 · 3 obs

○ 2026-06-15 19:46:14
● 2026-07-02 23:22:04
● 2026-08-02 01:45:04

○A2606:4700:3036::6815:2fc52026-03-02 → 2026-06-15 · 4 obs

● 2026-03-02 23:56:50
● 2026-06-15 19:46:14
○ 2026-07-02 23:22:04
○ 2026-08-02 01:45:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
coursemarks.com	charles.ns.cloudflare.com, hope.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.163

NS records: charles.ns.cloudflare.com, hope.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 222ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.172.40, 104.21.47.197`
AAAA	2	`2606:4700:3035::6815:2fc5, 2606:4700:3033::ac43:ac28`
NS	2	`charles.ns.cloudflare.com, hope.ns.cloudflare.com`
MX	3	`route1.mx.cloudflare.net (pri: 33), route3.mx.cloudflare.net (pri: 56)...`
TXT	4	`google-site-verification=PPF_0PqdMwbg8-D, google-site-verification=x2agMm8YZ-wZ6g_...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`charles.ns.cloudflare.com dns.cloudflare`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (charles.ns.cloudflare.com, charles.ns.cloudflare.com, charles.ns.cloudflare.com...)

Analysis

Hierarchy

coursemarks.com is a parent domain of www.coursemarks.com.

IP Addresses

coursemarks.com has four IP addresses: 104.21.47.197, 172.67.172.40, 2606:4700:3033::ac43:ac28 and 2606:4700:3035::6815:2fc5.

Additional host names — www.potnhub.org, dontleave.us, allello.com and two others — share IP numbers with coursemarks.com.

Name Servers

coursemarks.com is served by two delegated name servers, charles.ns.cloudflare.com and hope.ns.cloudflare.com.

coursemarks.com shares its name server setup with other domains, including hopeinstruggle.com, 1link.club, apkscenter.com and two others.

coursemarks.com shares at least some of its name servers with other domains, including vic88.diy, alphaintra.com, pinnacledigest.com and two others.

These name servers are frequently paired with the name servers anuj.ns.cloudflare.com, dora.ns.cloudflare.com and aida.ns.cloudflare.com.

Host names with 6 IP numbers:

charles.ns.cloudflare.com carries IP addresses 108.162.193.83, 172.64.33.83 and 173.245.59.83, with 3 other addresses beyond those.

hope.ns.cloudflare.com carries IP addresses 108.162.192.163, 172.64.32.163 and 173.245.58.163, with 3 other addresses beyond those.

Mail Servers

coursemarks.com is handled by three mail servers: route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

coursemarks.com shares mail servers — at least in part — with other domains, including coinage-code.com, move-easy-umzuege.de, ifs-company.com and two others.

Host names with 6 IP numbers:

route1.mx.cloudflare.net carries IP addresses 162.159.205.11, 162.159.205.12 and 162.159.205.13, with 3 other addresses beyond those.

route2.mx.cloudflare.net carries IP addresses 162.159.205.17, 162.159.205.18 and 162.159.205.19, with 3 other addresses beyond those.

route3.mx.cloudflare.net carries IP addresses 162.159.205.23, 162.159.205.24 and 162.159.205.25, with 3 other addresses beyond those.