classstack.co - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`classstack.co`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::6815:3168^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:bdbd^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.49.104^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.189.189^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`elly.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:26f6^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elly.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2f6^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`elly.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22f6^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`elly.ns.cloudflare.com`
		A	108.162.194.246^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elly.ns.cloudflare.com`
		A	162.159.38.246^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elly.ns.cloudflare.com`
		A	172.64.34.246^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elly.ns.cloudflare.com`
NS	`langston.ns.cloudflare.com`
		A	2606:4700:58::a29f:2cfc^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`langston.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3fc^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`langston.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23fc^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`langston.ns.cloudflare.com`
		A	108.162.195.252^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`langston.ns.cloudflare.com`
		A	162.159.44.252^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`langston.ns.cloudflare.com`
		A	172.64.35.252^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`langston.ns.cloudflare.com`
MX	`eforward1.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward2.registrar-servers.com` ⭐
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward3.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward4.registrar-servers.com`⁽¹⁵⁾
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward5.registrar-servers.com`⁽²⁰⁾
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
TXT	`google-site-verification=z5wv5gkUQqPf27GVLpA5tBGBAF18ZxK8pyu9GduJ0YI`
TXT	`v=spf1 include:spf.efwd.registrar-servers.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.49.104, 172.67.189.189
		IPv6 hints	2606:4700:3030::6815:3168, 2606:4700:3035::ac43:bdbd
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=110, name=cloudflare-ech.com
SOA	`elly.ns.cloudflare.com`dns@cloudflare.com serial=2411476118

`co`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns0.centralnic.net` ⭐
	NS	`a.registrydns.co`
	NS	`b.registrydns.co`
	NS	`c.registrydns.co`
	NS	`d.registrydns.co`
	SOA	`ns0.centralnic.net`hostmaster@centralnic.net serial=1759753545

Same first word

classstack.in

classstack.co

classstack.org

classstack.app

Similar names

stackclass.ai

classtacks.workers.dev

stackclass.dev

stackclass.live

stackclass.net

stackclass.academy

Previous names

Next names

DNS History

15 records (11 active, 4 former)

●NSelly.ns.cloudflare.com2026-08-27 → 2026-09-09 · 2 obs

● 2026-08-27 13:44:22
● 2026-09-09 05:33:14

●NSlangston.ns.cloudflare.com2026-08-27 → 2026-09-09 · 2 obs

● 2026-08-27 13:44:22
● 2026-09-09 05:33:14

●MXeforward1.registrar-servers.com2026-08-27 → 2026-09-09 · 2 obs

● 2026-08-27 13:44:22
● 2026-09-09 05:33:14

●MXeforward2.registrar-servers.com2026-08-27 → 2026-09-09 · 2 obs

● 2026-08-27 13:44:22
● 2026-09-09 05:33:14

●MXeforward3.registrar-servers.com2026-08-27 → 2026-09-09 · 2 obs

● 2026-08-27 13:44:22
● 2026-09-09 05:33:14

●MXeforward4.registrar-servers.com2026-08-27 → 2026-09-09 · 2 obs

● 2026-08-27 13:44:22
● 2026-09-09 05:33:14

●MXeforward5.registrar-servers.com2026-08-27 → 2026-09-09 · 2 obs

● 2026-08-27 13:44:22
● 2026-09-09 05:33:14

●A104.21.49.1042026-09-09 → 2026-09-09 · 2 obs

○ 2026-08-27 13:44:22
● 2026-09-09 05:33:14

●A172.67.189.1892026-09-09 → 2026-09-09 · 2 obs

○ 2026-08-27 13:44:22
● 2026-09-09 05:33:14

○A188.114.96.02026-08-27 → 2026-08-27 · 2 obs

● 2026-08-27 13:44:22
○ 2026-09-09 05:33:14

○A188.114.97.02026-08-27 → 2026-08-27 · 2 obs

● 2026-08-27 13:44:22
○ 2026-09-09 05:33:14

●A2606:4700:3030::6815:31682026-09-09 → 2026-09-09 · 2 obs

○ 2026-08-27 13:44:22
● 2026-09-09 05:33:14

●A2606:4700:3035::ac43:bdbd2026-09-09 → 2026-09-09 · 2 obs

○ 2026-08-27 13:44:22
● 2026-09-09 05:33:14

○A2a06:98c1:3120::2026-08-27 → 2026-08-27 · 2 obs

● 2026-08-27 13:44:22
○ 2026-09-09 05:33:14

○A2a06:98c1:3121::2026-08-27 → 2026-08-27 · 2 obs

● 2026-08-27 13:44:22
○ 2026-09-09 05:33:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
co	a.registrydns.co, b.registrydns.co, c.registrydns.co, d.registrydns.co	8 records
classstack.co	elly.ns.cloudflare.com, langston.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.38.246

NS records: elly.ns.cloudflare.com, langston.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classstack.co (unsigned zone)

⏱️ Timing

Total: 583ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.49.104, 172.67.189.189`
AAAA	2	`2606:4700:3035::ac43:bdbd, 2606:4700:3030::6815:3168`
NS	2	`elly.ns.cloudflare.com, langston.ns.cloudflare.com`
MX	5	`eforward1.registrar-servers.com (pri: 10, eforward2.registrar-servers.com (pri: 10...`
TXT	2	`google-site-verification=z5wv5gkUQqPf27G, v=spf1 include:spf.efwd.registrar-server`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`elly.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 8

In-bailiwick: 8 (a.registrydns.co, a.registrydns.co, b.registrydns.co...)

Analysis

IP Addresses

classstack.co directs to four IP numbers, which are 104.21.49.104, 172.67.189.189, 2606:4700:3030::6815:3168 and 2606:4700:3035::ac43:bdbd.

nyrolink.com.pk, y555meapp.com, wdpak.net and two other host names share IP numbers with classstack.co.

Name Servers

classstack.co has two authoritative name servers — elly.ns.cloudflare.com and langston.ns.cloudflare.com.

classstack.co uses the same name servers as several other domains — among them schema-interactif.pages.dev, o2y5l44h.workers.dev, appointize.pages.dev and two more.

The name servers of classstack.co overlap at least partially with those of other domains — among them ycdehongchem.com, 89fc.xin, empuries-partners.com and two more.

It is common to find these name servers alongside the name servers alexandra.ns.cloudflare.com, jasper.ns.cloudflare.com, jaime.ns.cloudflare.com and two others.

Hostnames that resolve to 6 IP addresses:

elly.ns.cloudflare.com points to 108.162.194.246, 162.159.38.246, 172.64.34.246 and 3 other IP addresses.

langston.ns.cloudflare.com points to 108.162.195.252, 162.159.44.252, 172.64.35.252 and 3 other IP addresses.

Mail Servers

Five mail servers handle classstack.co: eforward1.registrar-servers.com, eforward2.registrar-servers.com, eforward3.registrar-servers.com and two others.

classstack.co has at least partial mail server overlap with other domains such as neferina.com, playfieldhub.com, vita-medishop.com and two more.

The mail servers eforward4.registrar-servers.com and eforward5.registrar-servers.com are commonly paired with these mail servers.

Hosts with just one IP address:

eforward1.registrar-servers.com resolves to 162.255.118.51.

eforward2.registrar-servers.com resolves to 162.255.118.52.

eforward3.registrar-servers.com resolves to 162.255.118.51.

eforward4.registrar-servers.com resolves to 162.255.118.52.

eforward5.registrar-servers.com resolves to 162.255.118.51.

The host names eforward1.registrar-servers.com, eforward3.registrar-servers.com and eforward5.registrar-servers.com each resolve to 162.255.118.51.

The host names eforward2.registrar-servers.com and eforward4.registrar-servers.com both resolve to 162.255.118.52 IP addresses.