classcortex.com - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`classcortex.com`

DNSSEC	🔒 Signed (DS record present)
A	2606:4700:3032::6815:12cf^{Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::ac43:b759^{Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.18.207^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.183.89^{Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`jonah.ns.cloudflare.com` ⭐
NS	`samara.ns.cloudflare.com`
MX	`route3.mx.cloudflare.net` ⭐
		A	2606:4700:f5::11^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::12^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::13^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.23^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.24^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.25^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
MX	`route1.mx.cloudflare.net`⁽⁶⁹⁾
		A	2606:4700:f5::b^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::c^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::d^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.11^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.12^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.13^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
MX	`route2.mx.cloudflare.net`⁽⁹³⁾
		A	2606:4700:f5::e^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::f^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::10^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.17^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.18^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.19^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
TXT	`google-site-verification=SQqvp0as0F0FXR2x6zzA54_VGYJlx0-k9y1PFaWpubE`
TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.18.207, 172.67.183.89
		IPv6 hints	2606:4700:3032::6815:12cf, 2606:4700:3033::ac43:b759
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=212, name=cloudflare-ech.com
SOA	`jonah.ns.cloudflare.com`dns@cloudflare.com serial=2418340964

`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=1793601971

Same first word

classcortex.com

classcortex.pages.dev

classcortex.workers.dev

Similar names

costscalerx.com.de

DNS History

9 records (9 active, 0 former)

●NSjonah.ns.cloudflare.com2026-08-28 → 2026-11-02 · 2 obs

● 2026-08-28 10:31:34
● 2026-11-02 07:01:24

●NSsamara.ns.cloudflare.com2026-08-28 → 2026-11-02 · 2 obs

● 2026-08-28 10:31:34
● 2026-11-02 07:01:24

●MXroute1.mx.cloudflare.net2026-08-28 → 2026-11-02 · 2 obs

● 2026-08-28 10:31:34
● 2026-11-02 07:01:24

●MXroute2.mx.cloudflare.net2026-08-28 → 2026-11-02 · 2 obs

● 2026-08-28 10:31:34
● 2026-11-02 07:01:24

●MXroute3.mx.cloudflare.net2026-08-28 → 2026-11-02 · 2 obs

● 2026-08-28 10:31:34
● 2026-11-02 07:01:24

●A104.21.18.2072026-08-28 → 2026-11-02 · 2 obs

● 2026-08-28 10:31:34
● 2026-11-02 07:01:24

●A172.67.183.892026-08-28 → 2026-11-02 · 2 obs

● 2026-08-28 10:31:34
● 2026-11-02 07:01:24

●A2606:4700:3032::6815:12cf2026-08-28 → 2026-11-02 · 2 obs

● 2026-08-28 10:31:34
● 2026-11-02 07:01:24

●A2606:4700:3033::ac43:b7592026-08-28 → 2026-11-02 · 2 obs

● 2026-08-28 10:31:34
● 2026-11-02 07:01:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
classcortex.com	jonah.ns.cloudflare.com, samara.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:172.64.34.160

NS records: jonah.ns.cloudflare.com, samara.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 453ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.183.89, 104.21.18.207`
AAAA	2	`2606:4700:3032::6815:12cf, 2606:4700:3033::ac43:b759`
NS	2	`jonah.ns.cloudflare.com, samara.ns.cloudflare.com`
MX	3	`route3.mx.cloudflare.net (pri: 10), route1.mx.cloudflare.net (pri: 69)...`
TXT	2	`google-site-verification=SQqvp0as0F0FXR2, v=spf1 include:_spf.mx.cloudflare.net ~a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`jonah.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

classcortex.com resolves to four IP addresses: 104.21.18.207, 172.67.183.89, 2606:4700:3032::6815:12cf and 2606:4700:3033::ac43:b759.

Name Servers

Two name servers handle the delegation for classcortex.com: jonah.ns.cloudflare.com and samara.ns.cloudflare.com.

Mail Servers

classcortex.com is handled by three mail servers, route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

Hostnames that resolve to 6 IP addresses:

route1.mx.cloudflare.net resolves to 162.159.205.11, 162.159.205.12 and 162.159.205.13 among others, with 3 other IP addresses in total.

route2.mx.cloudflare.net resolves to 162.159.205.17, 162.159.205.18 and 162.159.205.19 among others, with 3 other IP addresses in total.

route3.mx.cloudflare.net resolves to 162.159.205.23, 162.159.205.24 and 162.159.205.25 among others, with 3 other IP addresses in total.