`crystal-courses.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:3cc4^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:c87e^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.60.196^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.200.126^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`buck.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b4e^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`buck.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c14e^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`buck.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:214e^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`buck.ns.cloudflare.com`
		A	108.162.193.78^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`buck.ns.cloudflare.com`
		A	172.64.33.78^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`buck.ns.cloudflare.com`
		A	173.245.59.78^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`buck.ns.cloudflare.com`
NS	`mariah.ns.cloudflare.com`
		A	2606:4700:50::a29f:26c8^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mariah.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2c8^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`mariah.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22c8^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`mariah.ns.cloudflare.com`
		A	108.162.194.200^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mariah.ns.cloudflare.com`
		A	162.159.38.200^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mariah.ns.cloudflare.com`
		A	172.64.34.200^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mariah.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.60.196, 172.67.200.126
		IPv6 hints	2606:4700:3031::6815:3cc4, 2606:4700:3035::ac43:c87e
SOA	`buck.ns.cloudflare.com`dns@cloudflare.com serial=2402932744

`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=1778811906

⚠️ On DNS blocklist: tif

Same first word

crystal-courses.com

DNS History

6 records (6 active, 0 former)

●NSbuck.ns.cloudflare.com2026-05-01 → 2026-05-15 · 2 obs

● 2026-05-01 08:48:44
● 2026-05-15 02:30:00

●NSmariah.ns.cloudflare.com2026-05-01 → 2026-05-15 · 2 obs

● 2026-05-01 08:48:44
● 2026-05-15 02:30:00

●A104.21.60.1962026-05-01 → 2026-05-15 · 2 obs

● 2026-05-01 08:48:44
● 2026-05-15 02:30:00

●A172.67.200.1262026-05-01 → 2026-05-15 · 2 obs

● 2026-05-01 08:48:44
● 2026-05-15 02:30:00

●A2606:4700:3031::6815:3cc42026-05-01 → 2026-05-15 · 2 obs

● 2026-05-01 08:48:44
● 2026-05-15 02:30:00

●A2606:4700:3035::ac43:c87e2026-05-01 → 2026-05-15 · 2 obs

● 2026-05-01 08:48:44
● 2026-05-15 02:30:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, b.gtld-servers.net, f.gtld-servers.net, d.gtld-servers.net...	-
crystal-courses.com	buck.ns.cloudflare.com, mariah.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.78

NS records: buck.ns.cloudflare.com, mariah.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for crystal-courses.com (unsigned zone)

⏱️ Timing

Total: 174ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.60.196, 172.67.200.126`
AAAA	2	`2606:4700:3031::6815:3cc4, 2606:4700:3035::ac43:c87e`
NS	2	`buck.ns.cloudflare.com, mariah.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`buck.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

crystal-courses.com resolves to four IP numbers: 2606:4700:3031::6815:3cc4, 2606:4700:3035::ac43:c87e, 104.21.60.196 and 172.67.200.126.

other host names for instance mostrathess.gr, enterprise365spark.click, huge(0x626f6f62)sobsession.com, rubineia.sp.gov.br and arresalah.de share IP numbers with crystal-courses.com.

Name Servers

crystal-courses.com is delegated to two name servers: buck.ns.cloudflare.com and mariah.ns.cloudflare.com.

crystal-courses.com shares the same name server setup as other domains, for example plansaskdirect-intergo.com, supertvaovivo.top, supertvaovivo.com, supertvaovivo.lat and filestek.com.

crystal-courses.com at least partially shares name servers with other domains, for instance unblocked-76.io, hdfcinvest.co.in, botinok.co.il, b98f9c488902340d.com and uyguniptv.com.

These name servers are often used with dylan.ns.cloudflare.com and corey.ns.cloudflare.com.

Host names with six IP numbers:

buck.ns.cloudflare.com points to: 2606:4700:58::adf5:3b4e, 2803:f800:50::6ca2:c14e, 2a06:98c1:50::ac40:214e, 108.162.193.78, 172.64.33.78 and 173.245.59.78; mariah.ns.cloudflare.com points to: 2606:4700:50::a29f:26c8, 2803:f800:50::6ca2:c2c8, 2a06:98c1:50::ac40:22c8, 108.162.194.200, 162.159.38.200 and 172.64.34.200.

crystal-courses.com - robtex.com