`federatedclusterlab.courses`

DNSSEC	⚠️ Not signed
A	104.21.93.10^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.201.223^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`tim.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b91^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tim.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c191^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`tim.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2191^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`tim.ns.cloudflare.com`
		A	108.162.193.145^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tim.ns.cloudflare.com`
		A	172.64.33.145^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tim.ns.cloudflare.com`
		A	173.245.59.145^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tim.ns.cloudflare.com`
NS	`zelda.ns.cloudflare.com`
		A	2606:4700:50::adf5:3af2^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0f2^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`zelda.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20f2^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`zelda.ns.cloudflare.com`
		A	108.162.192.242^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
		A	172.64.32.242^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
		A	173.245.58.242^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.93.10, 172.67.201.223
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=119, name=cloudflare-ech.com
SOA	`tim.ns.cloudflare.com`dns@cloudflare.com serial=2410820665

`courses`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.nic.courses` ⭐
	NS	`b.nic.courses`
	NS	`c.nic.courses`
	NS	`x.nic.courses`
	NS	`y.nic.courses`
	NS	`z.nic.courses`
	SOA	`a.nic.courses`admin@tldns.godaddy serial=1786528270

⚠️ On DNS blocklist: tif
⚠️ On DNS blocklist: spam-tlds

Subdomains

www.federatedclusterlab.courses

Same first word

federatedclusterlab.courses

DNS History

6 records (4 active, 2 former)

●NStim.ns.cloudflare.com2026-05-23 → 2026-08-12 · 2 obs

● 2026-05-23 06:35:56
● 2026-08-12 09:59:44

●NSzelda.ns.cloudflare.com2026-05-23 → 2026-08-12 · 2 obs

● 2026-05-23 06:35:56
● 2026-08-12 09:59:44

●A104.21.93.102026-05-23 → 2026-08-12 · 4 obs

● 2026-05-23 06:35:56
● 2026-06-06 22:21:32
○ 2026-06-20 12:14:04
● 2026-08-12 09:59:44

●A172.67.201.2232026-05-23 → 2026-08-12 · 4 obs

● 2026-05-23 06:35:56
● 2026-06-06 22:21:32
○ 2026-06-20 12:14:04
● 2026-08-12 09:59:44

○A188.114.96.02026-06-20 → 2026-06-20 · 3 obs

○ 2026-06-06 22:21:32
● 2026-06-20 12:14:04
○ 2026-08-12 09:59:44

○A188.114.97.02026-06-20 → 2026-06-20 · 3 obs

○ 2026-06-06 22:21:32
● 2026-06-20 12:14:04
○ 2026-08-12 09:59:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
courses	a.nic.courses, b.nic.courses, c.nic.courses, x.nic.courses...	12 records
federatedclusterlab.courses	tim.ns.cloudflare.com, zelda.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.192.242

NS records: tim.ns.cloudflare.com, zelda.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for federatedclusterlab.courses (unsigned zone)

⏱️ Timing

Total: 299ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.93.10, 172.67.201.223`
NS	2	`tim.ns.cloudflare.com, zelda.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`tim.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (a.nic.courses, b.nic.courses, c.nic.courses...)

Analysis

Hierarchy

www.federatedclusterlab.courses is delegated beneath federatedclusterlab.courses.

IP Addresses

federatedclusterlab.courses has two IP addresses: 104.21.93.10 and 172.67.201.223

smmkalite.com, (0x736578)omercadobcn.top, mail.eduunivkas.ru and two other host names share IP numbers with federatedclusterlab.courses.

Name Servers

DNS delegation for federatedclusterlab.courses points to two name servers: tim.ns.cloudflare.com and zelda.ns.cloudflare.com.

federatedclusterlab.courses uses the same name servers as several other domains — among them eligoins.com, avjheights.in, irpmail.com and two more.

There is at least partial name server overlap between federatedclusterlab.courses and other domains — indobet365c.icu, oandainsider.mobi, grandcanals.com and two more among them.

These name servers frequently co-occur with the name servers adrian.ns.cloudflare.com and arvind.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

tim.ns.cloudflare.com has IP addresses 108.162.193.145, 172.64.33.145 and 173.245.59.145, plus 3 other.

zelda.ns.cloudflare.com has IP addresses 108.162.192.242, 172.64.32.242 and 173.245.58.242, plus 3 other.

federatedclusterlab.courses - robtex.com