courseinterest.com - dns.ninja

`courseinterest.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:ac95^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::6815:3fe6^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.63.230^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.172.149^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`eric.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b70^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c170^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`eric.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2170^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`eric.ns.cloudflare.com`
		A	108.162.193.112^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
		A	172.64.33.112^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
		A	173.245.59.112^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
NS	`mira.ns.cloudflare.com`
		A	2606:4700:50::adf5:3acc^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mira.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0cc^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`mira.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20cc^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`mira.ns.cloudflare.com`
		A	108.162.192.204^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mira.ns.cloudflare.com`
		A	172.64.32.204^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mira.ns.cloudflare.com`
		A	173.245.58.204^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mira.ns.cloudflare.com`
TXT	`ca3-6b10ed959b6a4f86a13437697804895c`
TXT	`v=spf1 -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.63.230, 172.67.172.149
		IPv6 hints	2606:4700:3030::ac43:ac95, 2606:4700:3033::6815:3fe6
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=188, name=cloudflare-ech.com
SOA	`eric.ns.cloudflare.com`dns@cloudflare.com serial=2406941143

`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=1784013172

Same first word

courseinterest.com

DNS History

11 records (6 active, 5 former)

●NSeric.ns.cloudflare.com2026-02-23 → 2026-07-14 · 3 obs

○ 2020-03-29 06:26:46
● 2026-02-23 17:14:36
● 2026-07-14 07:22:26

●NSmira.ns.cloudflare.com2026-02-23 → 2026-07-14 · 3 obs

○ 2020-03-29 06:26:46
● 2026-02-23 17:14:36
● 2026-07-14 07:22:26

○NSns71.domaincontrol.com2020-03-29 → 2020-03-29 · 3 obs

● 2020-03-29 06:26:46
○ 2026-02-23 17:14:36
○ 2026-07-14 07:22:26

○NSns72.domaincontrol.com2020-03-29 → 2020-03-29 · 3 obs

● 2020-03-29 06:26:46
○ 2026-02-23 17:14:36
○ 2026-07-14 07:22:26

●A104.21.63.2302026-02-23 → 2026-07-14 · 3 obs

○ 2020-03-29 06:26:46
● 2026-02-23 17:14:36
● 2026-07-14 07:22:26

●A172.67.172.1492026-02-23 → 2026-07-14 · 3 obs

○ 2020-03-29 06:26:46
● 2026-02-23 17:14:36
● 2026-07-14 07:22:26

●A2606:4700:3030::ac43:ac952026-07-12 → 2026-07-14 · 3 obs

○ 2026-02-23 17:14:36
● 2026-07-12 06:29:12
● 2026-07-14 07:22:26

○A2606:4700:3032::ac43:ac952026-02-23 → 2026-02-23 · 4 obs

○ 2020-03-29 06:26:46
● 2026-02-23 17:14:36
○ 2026-07-12 06:29:12
○ 2026-07-14 07:22:26

●A2606:4700:3033::6815:3fe62026-07-12 → 2026-07-14 · 3 obs

○ 2026-02-23 17:14:36
● 2026-07-12 06:29:12
● 2026-07-14 07:22:26

○A2606:4700:3035::6815:3fe62026-02-23 → 2026-02-23 · 4 obs

○ 2020-03-29 06:26:46
● 2026-02-23 17:14:36
○ 2026-07-12 06:29:12
○ 2026-07-14 07:22:26

○A50.63.202.512020-03-29 → 2020-03-29 · 3 obs

● 2020-03-29 06:26:46
○ 2026-02-23 17:14:36
○ 2026-07-14 07:22:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	e.gtld-servers.net, c.gtld-servers.net, m.gtld-servers.net, g.gtld-servers.net...	-
courseinterest.com	eric.ns.cloudflare.com, mira.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.112

NS records: eric.ns.cloudflare.com, mira.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for courseinterest.com (unsigned zone)

⏱️ Timing

Total: 41ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.63.230, 172.67.172.149`
AAAA	2	`2606:4700:3030::ac43:ac95, 2606:4700:3033::6815:3fe6`
NS	2	`eric.ns.cloudflare.com, mira.ns.cloudflare.com`
TXT	2	`ca3-6b10ed959b6a4f86a13437697804895c, v=spf1 -all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`eric.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

courseinterest.com resolves to four IP addresses: 104.21.63.230, 172.67.172.149, 2606:4700:3030::ac43:ac95 and 2606:4700:3033::6815:3fe6.

i3dfree.com, isaudjf1777.com, forbot.eu and two other host names share IP numbers with courseinterest.com.

Name Servers

Two name servers handle the delegation for courseinterest.com: eric.ns.cloudflare.com and mira.ns.cloudflare.com.

courseinterest.com uses the same name servers as several other domains — among them krizanet.com, manifiesto.biz, chipsforfree.com and two more.

courseinterest.com shares at least some of its name servers with other domains, including steelserve.co.uk, filewebspace.com, crowdstrikehome.net and two others.

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

Hostnames that resolve to 6 IP addresses:

eric.ns.cloudflare.com resolves to 108.162.193.112, 172.64.33.112 and 173.245.59.112 among others, with 3 other IP addresses in total.

mira.ns.cloudflare.com resolves to 108.162.192.204, 172.64.32.204 and 173.245.58.204 among others, with 3 other IP addresses in total.