mail.czclass.com - robtex.com

mail.czclass.com

DNSSEC⚠️ Not signed
A2606:4700:3035::ac43:b6ec🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:406f🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.64.111Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.182.236🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.64.111, 172.67.182.236
IPv6 hints2606:4700:3035::ac43:b6ec, 2606:4700:3037::6815:406f
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=238, name=cloudflare-ech.com

czclass.com

DNSSEC⚠️ Not signed
A2606:4700:3035::ac43:b6ec🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:406f🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.64.111Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.182.236🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSachiel.ns.cloudflare.com ⭐
NShadlee.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.64.111, 172.67.182.236
IPv6 hints2606:4700:3035::ac43:b6ec, 2606:4700:3037::6815:406f
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=238, name=cloudflare-ech.com
SOAachiel.ns.cloudflare.comdns@cloudflare.com serial=2402993582

Previously MX for

czclass.com

Same first word

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DNS History

5 records (4 active, 1 former)

20162017201820192020202120222023202420252026A104.21.64.111172.67.182.2362606:4700:3035::ac43:b6ec2606:4700:3037::6815:406f127.0.0.1
●A104.21.64.1112026-03-09 → 2026-05-10 · 3 obs
○ 2016-06-19 20:41:02
● 2026-03-09 08:57:30
● 2026-05-10 08:40:06
○A127.0.0.12015-07-26 → 2016-06-19 · 4 obs
● 2015-07-26 02:15:06
● 2016-06-19 20:41:02
○ 2026-03-09 08:57:30
○ 2026-05-10 08:40:06
●A172.67.182.2362026-03-09 → 2026-05-10 · 3 obs
○ 2016-06-19 20:41:02
● 2026-03-09 08:57:30
● 2026-05-10 08:40:06
●A2606:4700:3035::ac43:b6ec2026-03-09 → 2026-05-10 · 3 obs
○ 2016-06-19 20:41:02
● 2026-03-09 08:57:30
● 2026-05-10 08:40:06
●A2606:4700:3037::6815:406f2026-03-09 → 2026-05-10 · 3 obs
○ 2016-06-19 20:41:02
● 2026-03-09 08:57:30
● 2026-05-10 08:40:06

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comb.gtld-servers.net, d.gtld-servers.net, l.gtld-servers.net, c.gtld-servers.net...-
czclass.comhadlee.ns.cloudflare.com, achiel.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.195.123

NS records: hadlee.ns.cloudflare.com, achiel.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for czclass.com (unsigned zone)

⏱️ Timing

Total: 422ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.182.236, 104.21.64.111
AAAA22606:4700:3035::ac43:b6ec, 2606:4700:3037::6815:406f
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

mail.czclass.com maps to four IP numbers: 2606:4700:3035::ac43:b6ec, 2606:4700:3037::6815:406f, 104.21.64.111 and 172.67.182.236.

Other host names, for instance www.iperstore.net, www.curexe.com, ssh.guru, umbraclusternov.com and baker.support share IP numbers with mail.czclass.com.