classstack.org - dns.ninja

🛡️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	204.141.43.44^{🇺🇸 ZohoAS204.141.42.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx3.zoho.com`⁽²⁰⁾
		A	204.141.43.44^{🇺🇸 ZohoAS204.141.42.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx.zoho.com`⁽⁵⁰⁾
		A	204.141.43.44^{🇺🇸 ZohoAS204.141.42.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.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=1789097792

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 → 2026-09-11 · 2 obs

● 2026-08-21 15:01:02
● 2026-09-11 04:01:18

●NSkia.ns.cloudflare.com2026-08-21 → 2026-09-11 · 2 obs

● 2026-08-21 15:01:02
● 2026-09-11 04:01:18

●MXmx.zoho.com2026-08-21 → 2026-09-11 · 2 obs

● 2026-08-21 15:01:02
● 2026-09-11 04:01:18

●MXmx2.zoho.com2026-08-21 → 2026-09-11 · 2 obs

● 2026-08-21 15:01:02
● 2026-09-11 04:01:18

●MXmx3.zoho.com2026-08-21 → 2026-09-11 · 2 obs

● 2026-08-21 15:01:02
● 2026-09-11 04:01:18

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

○ 2026-08-21 15:01:02
● 2026-09-11 04:01:14
● 2026-09-11 04:01:18

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

○ 2026-08-21 15:01:02
● 2026-09-11 04:01:14
● 2026-09-11 04:01:18

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

● 2026-08-21 15:01:02
○ 2026-09-11 04:01:14
○ 2026-09-11 04:01:18

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

● 2026-08-21 15:01:02
○ 2026-09-11 04:01:14
○ 2026-09-11 04:01:18

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

○ 2026-08-21 15:01:02
● 2026-09-11 04:01:14
● 2026-09-11 04:01:18

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

○ 2026-08-21 15:01:02
● 2026-09-11 04:01:14
● 2026-09-11 04:01:18

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

● 2026-08-21 15:01:02
○ 2026-09-11 04:01:14
○ 2026-09-11 04:01:18

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

● 2026-08-21 15:01:02
○ 2026-09-11 04:01:14
○ 2026-09-11 04:01:18

🔍 DNS Trace

📋 Delegation Chain

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

✅ Authoritative Response

Server:173.245.58.179

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: 2808ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.160.141, 104.21.14.206`
AAAA	2	`2606:4700:3034::ac43:a08d, 2606:4700:3036::6815:ece`
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 has four IP addresses: 104.21.14.206, 172.67.160.141, 2606:4700:3034::ac43:a08d and 2606:4700:3036::6815:ece.

Two other host names, along with get-amzmarketing.com, mail.docs-en-stock.com and biovene.ch, also share IP numbers with classstack.org.

Name Servers

Two name servers handle the delegation for classstack.org: david.ns.cloudflare.com and kia.ns.cloudflare.com.

classstack.org shares its NS records with other domains, for example smmservices360.com, planagency-edu.pages.dev, aviationcollegekenya.co.ke and two others.

classstack.org has at least partial name server overlap with other domains, such as 99ddzz.com, svfly1.xyz, bufirstbulast.workers.dev and two others.

These name servers tend to appear together with the name servers tom.ns.cloudflare.com, darwin.ns.cloudflare.com and jade.ns.cloudflare.com.

DNS names with 6 IP addresses:

david.ns.cloudflare.com resolves to 108.162.193.152, 172.64.33.152 and 173.245.59.152 among others, with 3 other IP addresses in total.

kia.ns.cloudflare.com resolves to 108.162.192.179, 172.64.32.179 and 173.245.58.179 among others, with 3 other IP addresses in total.

Mail Servers

classstack.org has three mail servers: mx2.zoho.com, mx3.zoho.com and mx.zoho.com.

There is at least a partial MX overlap between classstack.org and other domains, including tama123.top, prismamaterials.com, thriveenglish.co and two others.

All three — mx2.zoho.com, mx3.zoho.com and mx.zoho.com — point to 204.141.43.44 as their single IP address.

Each of mx2.zoho.com, mx3.zoho.com and mx.zoho.com resolves to 204.141.43.44.