🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`classstack.org`

DNSSEC	⚠️ Not signed
A	2606:4700:3034::ac43:a08d^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::6815:ece^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.14.206^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.160.141^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`david.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b98^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`david.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c198^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`david.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2198^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`david.ns.cloudflare.com`
		A	108.162.193.152^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`david.ns.cloudflare.com`
		A	172.64.33.152^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`david.ns.cloudflare.com`
		A	173.245.59.152^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`david.ns.cloudflare.com`
NS	`kia.ns.cloudflare.com`
		A	2606:4700:50::adf5:3ab3^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kia.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0b3^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`kia.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20b3^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`kia.ns.cloudflare.com`
		A	108.162.192.179^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kia.ns.cloudflare.com`
		A	172.64.32.179^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kia.ns.cloudflare.com`
		A	173.245.58.179^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kia.ns.cloudflare.com`
MX	`mx2.zoho.com` ⭐
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx3.zoho.com`⁽²⁰⁾
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx.zoho.com`⁽⁵⁰⁾
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
TXT	`google-site-verification=hKiDC4A771n7lYuOFCky8Cw_Go05GS96w19mzI_1MXs`
TXT	`v=spf1 include:zohomail.com ~all`
TXT	`zoho-verification=zb85329823.zmverify.zoho.com`
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	104.21.14.206, 172.67.160.141
		IPv6 hints	2606:4700:3034::ac43:a08d, 2606:4700:3036::6815:ece
SOA	`david.ns.cloudflare.com`dns@cloudflare.com serial=2414430415

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1789383042

Same first word

classstack.in

classstack.co

classstack.org

classstack.app

Similar names

stackclass.live

stackclass.net

stackclass.academy

stackclass.ai

classtacks.workers.dev

stackclass.dev

Previous names

Next names

DNS History

13 records (9 active, 4 former)

●NSdavid.ns.cloudflare.com2026-08-21 → 2026-09-14 · 2 obs

● 2026-08-21 15:01:02
● 2026-09-14 11:15:06

●NSkia.ns.cloudflare.com2026-08-21 → 2026-09-14 · 2 obs

● 2026-08-21 15:01:02
● 2026-09-14 11:15:06

●MXmx.zoho.com2026-08-21 → 2026-09-14 · 2 obs

● 2026-08-21 15:01:02
● 2026-09-14 11:15:06

●MXmx2.zoho.com2026-08-21 → 2026-09-14 · 2 obs

● 2026-08-21 15:01:02
● 2026-09-14 11:15:06

●MXmx3.zoho.com2026-08-21 → 2026-09-14 · 2 obs

● 2026-08-21 15:01:02
● 2026-09-14 11:15:06

●A104.21.14.2062026-09-11 → 2026-09-14 · 3 obs

○ 2026-08-21 15:01:02
● 2026-09-11 04:01:14
● 2026-09-14 11:15:06

●A172.67.160.1412026-09-11 → 2026-09-14 · 3 obs

○ 2026-08-21 15:01:02
● 2026-09-11 04:01:14
● 2026-09-14 11:15:06

○A188.114.96.02026-08-21 → 2026-08-21 · 3 obs

● 2026-08-21 15:01:02
○ 2026-09-11 04:01:14
○ 2026-09-14 11:15:06

○A188.114.97.02026-08-21 → 2026-08-21 · 3 obs

● 2026-08-21 15:01:02
○ 2026-09-11 04:01:14
○ 2026-09-14 11:15:06

●A2606:4700:3034::ac43:a08d2026-09-11 → 2026-09-14 · 3 obs

○ 2026-08-21 15:01:02
● 2026-09-11 04:01:14
● 2026-09-14 11:15:06

●A2606:4700:3036::6815:ece2026-09-11 → 2026-09-14 · 3 obs

○ 2026-08-21 15:01:02
● 2026-09-11 04:01:14
● 2026-09-14 11:15:06

○A2a06:98c1:3120::2026-08-21 → 2026-08-21 · 3 obs

● 2026-08-21 15:01:02
○ 2026-09-11 04:01:14
○ 2026-09-14 11:15:06

○A2a06:98c1:3121::2026-08-21 → 2026-08-21 · 3 obs

● 2026-08-21 15:01:02
○ 2026-09-11 04:01:14
○ 2026-09-14 11:15:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
classstack.org	david.ns.cloudflare.com, kia.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.179

NS records: david.ns.cloudflare.com, kia.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classstack.org (unsigned zone)

⏱️ Timing

Total: 650ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.14.206, 172.67.160.141`
AAAA	2	`2606:4700:3036::6815:ece, 2606:4700:3034::ac43:a08d`
NS	2	`david.ns.cloudflare.com, kia.ns.cloudflare.com`
MX	3	`mx.zoho.com (pri: 10), mx2.zoho.com (pri: 20)...`
TXT	3	`google-site-verification=hKiDC4A771n7lYu, v=spf1 include:zohomail.com ~all...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h2"]`
SOA	1	`david.ns.cloudflare.com dns.cloudflare.c`

Analysis

IP Addresses

classstack.org points to the four IP addresses 104.21.14.206, 172.67.160.141, 2606:4700:3034::ac43:a08d and 2606:4700:3036::6815:ece.

Additional host names — get-amzmarketing.com, mail.docs-en-stock.com, sashadarling.com and two others — share IP numbers with classstack.org.

Name Servers

classstack.org is delegated to two name servers: david.ns.cloudflare.com and kia.ns.cloudflare.com.

classstack.org shares its name server setup with other domains, including smmservices360.com, planagency-edu.pages.dev, aviationcollegekenya.co.ke and two others.

There is at least partial name server overlap between classstack.org and other domains — 99ddzz.com, svfly1.xyz, bufirstbulast.workers.dev and two more among them.

These name servers are routinely deployed together with the name servers tom.ns.cloudflare.com.

Host names with 6 IP numbers:

david.ns.cloudflare.com resolves to 108.162.193.152, 172.64.33.152, 173.245.59.152 and 3 other IP addresses.

kia.ns.cloudflare.com resolves to 108.162.192.179, 172.64.32.179, 173.245.58.179 and 3 other IP addresses.

Mail Servers

Incoming mail for classstack.org is delivered via three mail servers: mx2.zoho.com, mx3.zoho.com and mx.zoho.com.

classstack.org shares mail servers — at least in part — with other domains, including mailodious.com, tama123.top, prismamaterials.com and two others.

mx2.zoho.com, mx3.zoho.com and mx.zoho.com each resolve to a single IP address: 136.143.191.44.

mx2.zoho.com, mx3.zoho.com and mx.zoho.com are host names that all point to 136.143.191.44.

classstack.org - robtex.com

classstack.org

org

Same first word

Similar names

Previous names

Next names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`classstack.org`

`org`