coursesite.com - dns.ninja

`coursesite.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:8ddf^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:5979^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.89.121^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.141.223^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`clarissa.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:267b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clarissa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c27b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`clarissa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:227b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`clarissa.ns.cloudflare.com`
		A	108.162.194.123^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clarissa.ns.cloudflare.com`
		A	162.159.38.123^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clarissa.ns.cloudflare.com`
		A	172.64.34.123^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clarissa.ns.cloudflare.com`
NS	`colin.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c4b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`colin.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c34b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`colin.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:234b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`colin.ns.cloudflare.com`
		A	108.162.195.75^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`colin.ns.cloudflare.com`
		A	162.159.44.75^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`colin.ns.cloudflare.com`
		A	172.64.35.75^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`colin.ns.cloudflare.com`
MX	`mx1.cloudhosting.net` ⭐
		A	185.53.56.44^{🇬🇧 KRYSTAL185.53.56.0/22}
			PTR	`mx1.strikemail.co.uk`
		A	185.53.56.46^{🇬🇧 KRYSTAL185.53.56.0/22}
			PTR	`mx1.strikemail.co.uk`
MX	`mx2.cloudhosting.net`⁽²⁰⁾
		A	185.53.56.45^{🇬🇧 KRYSTAL185.53.56.0/22}
			PTR	`mx2.strikemail.co.uk`
		A	185.53.56.47^{🇬🇧 KRYSTAL185.53.56.0/22}
			PTR	`mx2.strikemail.co.uk`
TXT	`v=spf1 a:mail.coursesite.com include:spf.ahasend.com include:relay.mailchanne...`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.89.121, 172.67.141.223
		IPv6 hints	2606:4700:3033::ac43:8ddf, 2606:4700:3035::6815:5979
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=146, name=cloudflare-ech.com
SOA	`clarissa.ns.cloudflare.com`dns@cloudflare.com serial=2406642331

`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=1784802907

Subdomains

smtp.coursesite.com

Same first word

coursesite.com

coursesite.biz

Similar names

DNS History

20 records (8 active, 12 former)

●NSclarissa.ns.cloudflare.com2026-05-10 → 2026-07-23 · 3 obs

○ 2019-12-23 23:09:38
● 2026-05-10 07:04:00
● 2026-07-23 11:01:46

●NScolin.ns.cloudflare.com2026-05-10 → 2026-07-23 · 3 obs

○ 2019-12-23 23:09:38
● 2026-05-10 07:04:00
● 2026-07-23 11:01:46

○NSns05.domaincontrol.com2015-06-17 → 2019-12-23 · 4 obs

● 2015-06-17 12:46:30
● 2019-12-23 23:09:38
○ 2026-05-10 07:04:00
○ 2026-07-23 11:01:46

○NSns06.domaincontrol.com2015-06-17 → 2019-12-23 · 4 obs

● 2015-06-17 12:46:30
● 2019-12-23 23:09:38
○ 2026-05-10 07:04:00
○ 2026-07-23 11:01:46

○NSns1.dyna-ns.net2026-05-10 → 2026-07-23 · 2 obs

○ 2026-05-10 07:04:00
○ 2026-07-23 11:01:46

○NSns2.dyna-ns.net2026-05-10 → 2026-07-23 · 2 obs

○ 2026-05-10 07:04:00
○ 2026-07-23 11:01:46

○MXmailstore1.secureserver.net2015-06-17 → 2019-12-23 · 4 obs

● 2015-06-17 12:46:30
● 2019-12-23 23:09:38
○ 2026-05-10 07:04:00
○ 2026-07-23 11:01:46

●MXmx1.cloudhosting.net2026-06-27 → 2026-07-23 · 3 obs

○ 2026-06-02 13:22:40
● 2026-06-27 01:55:10
● 2026-07-23 11:01:46

●MXmx2.cloudhosting.net2026-06-27 → 2026-07-23 · 3 obs

○ 2026-06-02 13:22:40
● 2026-06-27 01:55:10
● 2026-07-23 11:01:46

○MXsmtp.coursesite.com2026-05-10 → 2026-06-02 · 5 obs

○ 2019-12-23 23:09:38
● 2026-05-10 07:04:00
● 2026-06-02 13:22:40
○ 2026-06-27 01:55:10
○ 2026-07-23 11:01:46

○MXsmtp.secureserver.net2015-06-17 → 2019-12-23 · 4 obs

● 2015-06-17 12:46:30
● 2019-12-23 23:09:38
○ 2026-05-10 07:04:00
○ 2026-07-23 11:01:46

●A104.21.89.1212026-05-10 → 2026-07-23 · 3 obs

○ 2019-12-23 23:09:38
● 2026-05-10 07:04:00
● 2026-07-23 11:01:46

○A132.148.19.92019-12-23 → 2019-12-23 · 4 obs

○ 2017-02-02 07:15:56
● 2019-12-23 23:09:38
○ 2026-05-10 07:04:00
○ 2026-07-23 11:01:46

●A172.67.141.2232026-05-10 → 2026-07-23 · 3 obs

○ 2019-12-23 23:09:38
● 2026-05-10 07:04:00
● 2026-07-23 11:01:46

○A2606:4700:3032::ac43:8ddf2026-05-10 → 2026-06-02 · 5 obs

○ 2019-12-23 23:09:38
● 2026-05-10 07:04:00
● 2026-06-02 13:22:40
○ 2026-06-27 01:55:10
○ 2026-07-23 11:01:46

●A2606:4700:3033::ac43:8ddf2026-06-27 → 2026-07-23 · 3 obs

○ 2026-06-02 13:22:40
● 2026-06-27 01:55:10
● 2026-07-23 11:01:46

●A2606:4700:3035::6815:59792026-06-27 → 2026-07-23 · 3 obs

○ 2026-06-02 13:22:40
● 2026-06-27 01:55:10
● 2026-07-23 11:01:46

○A2606:4700:3037::6815:59792026-05-10 → 2026-06-02 · 5 obs

○ 2019-12-23 23:09:38
● 2026-05-10 07:04:00
● 2026-06-02 13:22:40
○ 2026-06-27 01:55:10
○ 2026-07-23 11:01:46

○A64.131.82.1482015-06-17 → 2017-02-02 · 4 obs

● 2015-06-17 12:46:30
● 2017-02-02 07:15:56
○ 2019-12-23 23:09:38
○ 2026-07-23 11:01:46

○A67.227.250.1902026-05-10 → 2026-07-23 · 2 obs

○ 2026-05-10 07:04:00
○ 2026-07-23 11:01:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, a.gtld-servers.net, f.gtld-servers.net, k.gtld-servers.net...	-
coursesite.com	clarissa.ns.cloudflare.com, colin.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.123

NS records: clarissa.ns.cloudflare.com, colin.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coursesite.com (unsigned zone)

⏱️ Timing

Total: 759ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.141.223, 104.21.89.121`
AAAA	2	`2606:4700:3035::6815:5979, 2606:4700:3033::ac43:8ddf`
NS	2	`clarissa.ns.cloudflare.com, colin.ns.cloudflare.com`
MX	2	`mx1.cloudhosting.net (pri: 10), mx2.cloudhosting.net (pri: 20)`
TXT	1	`v=spf1 a:mail.coursesite.com include:spf`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`clarissa.ns.cloudflare.com dns.cloudflar`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

smtp.coursesite.com is delegated beneath coursesite.com.

IP Addresses

coursesite.com points to the four IP addresses 104.21.89.121, 172.67.141.223, 2606:4700:3033::ac43:8ddf and 2606:4700:3035::6815:5979.

zonep2p.pl, gpeff.com, dspace.vn and two other host names share IP numbers with coursesite.com.

Name Servers

coursesite.com has two authoritative name servers — clarissa.ns.cloudflare.com and colin.ns.cloudflare.com.

coursesite.com uses the same name servers as several other domains — among them scgmbhd.com, strobic.com, diplomas.org and two more.

There is at least partial name server overlap between coursesite.com and other domains — vip66.channel, ecm.mn, xinguokafei.com and two more among them.

These name servers regularly appear alongside amanda.ns.cloudflare.com, laylah.ns.cloudflare.com, noor.ns.cloudflare.com and 3 other name servers in NS record sets.

Hostnames that resolve to 6 IP addresses:

clarissa.ns.cloudflare.com points to 108.162.194.123, 162.159.38.123, 172.64.34.123 and 3 other IP addresses.

colin.ns.cloudflare.com points to 108.162.195.75, 162.159.44.75, 172.64.35.75 and 3 other IP addresses.

Mail Servers

Mail for coursesite.com is handled by two mail servers — mx1.cloudhosting.net and mx2.cloudhosting.net.

coursesite.com uses an identical mail server configuration to several other domains — among them webuyanycoaches.com, calcurate.co.uk, taboard.com and two more.

Some mail servers of coursesite.com are also used by other domains, notably cwsdisposables.co.uk and caveofcult.co.uk.

Both mx1.cloudhosting.net and mx2.cloudhosting.net have two IP addresses each. mx1.cloudhosting.net resolves to 185.53.56.44 and 185.53.56.46; mx2.cloudhosting.net resolves to 185.53.56.45 and 185.53.56.47.