`coursefocusworkshop.sbs`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:40af^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3031::ac43:bb34^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.64.175^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.187.52^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`hugh.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b75^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hugh.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c175^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`hugh.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2175^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`hugh.ns.cloudflare.com`
		A	108.162.193.117^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hugh.ns.cloudflare.com`
		A	172.64.33.117^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hugh.ns.cloudflare.com`
		A	173.245.59.117^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hugh.ns.cloudflare.com`
NS	`nena.ns.cloudflare.com`
		A	2606:4700:50::a29f:26a1^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nena.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2a1^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`nena.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22a1^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`nena.ns.cloudflare.com`
		A	108.162.194.161^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nena.ns.cloudflare.com`
		A	162.159.38.161^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nena.ns.cloudflare.com`
		A	172.64.34.161^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nena.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.64.175, 172.67.187.52
		IPv6 hints	2606:4700:3031::6815:40af, 2606:4700:3031::ac43:bb34
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=255, name=cloudflare-ech.com
SOA	`hugh.ns.cloudflare.com`dns@cloudflare.com serial=2410258025

`sbs`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns0.centralnic.net` ⭐
	NS	`a.nic.sbs`
	NS	`b.nic.sbs`
	NS	`c.nic.sbs`
	NS	`d.nic.sbs`
	SOA	`ns0.centralnic.net`hostmaster@centralnic.net serial=1785402021

⚠️ On DNS blocklist: tif

Same first word

coursefocusworkshop.sbs

DNS History

6 records (6 active, 0 former)

●NShugh.ns.cloudflare.com2026-07-27 → 2026-07-30 · 2 obs

● 2026-07-27 06:34:06
● 2026-07-30 09:06:48

●NSnena.ns.cloudflare.com2026-07-27 → 2026-07-30 · 2 obs

● 2026-07-27 06:34:06
● 2026-07-30 09:06:48

●A104.21.64.1752026-07-27 → 2026-07-30 · 2 obs

● 2026-07-27 06:34:06
● 2026-07-30 09:06:48

●A172.67.187.522026-07-27 → 2026-07-30 · 2 obs

● 2026-07-27 06:34:06
● 2026-07-30 09:06:48

●A2606:4700:3031::6815:40af2026-07-27 → 2026-07-30 · 2 obs

● 2026-07-27 06:34:06
● 2026-07-30 09:06:48

●A2606:4700:3031::ac43:bb342026-07-27 → 2026-07-30 · 2 obs

● 2026-07-27 06:34:06
● 2026-07-30 09:06:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
sbs	d.nic.sbs, b.nic.sbs, c.nic.sbs, a.nic.sbs	-
coursefocusworkshop.sbs	hugh.ns.cloudflare.com, nena.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.117

NS records: hugh.ns.cloudflare.com, nena.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coursefocusworkshop.sbs (unsigned zone)

⏱️ Timing

Total: 276ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.64.175, 172.67.187.52`
AAAA	2	`2606:4700:3031::ac43:bb34, 2606:4700:3031::6815:40af`
NS	2	`hugh.ns.cloudflare.com, nena.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`hugh.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

coursefocusworkshop.sbs resolves to four IP addresses: 104.21.64.175, 172.67.187.52, 2606:4700:3031::6815:40af and 2606:4700:3031::ac43:bb34.

yemenlinks.com, mindsisland.com, mail.tun.ac.th plus two other host names have IP numbers in common with coursefocusworkshop.sbs.

Name Servers

coursefocusworkshop.sbs uses two name servers for its delegation: hugh.ns.cloudflare.com and nena.ns.cloudflare.com.

The name server configuration of coursefocusworkshop.sbs is shared with other domains, for instance thecoursestrategy.digital, execadvancementclub.sbs, comparelinked.sbs and two others.

coursefocusworkshop.sbs has at least partial name server overlap with other domains, such as kenyarmosh.com, djebph.com, lamlion.nl and two others.

It is common to see these name servers used together with name servers harlan.ns.cloudflare.com and venkat.ns.cloudflare.com.

Hosts with 6 IP addresses each:

Hostname hugh.ns.cloudflare.com directs to 108.162.193.117, 172.64.33.117 and 173.245.59.117 along with 3 other IP addresses.

Hostname nena.ns.cloudflare.com directs to 108.162.194.161, 162.159.38.161 and 172.64.34.161 along with 3 other IP addresses.

coursefocusworkshop.sbs - robtex.com