mail.dtwo.com.cn - robtex.com

mail.dtwo.com.cn

DNSSEC⚠️ Not signed
A2606:4700:3033::6815:5b43🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:d358🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.91.67Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.211.88🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.91.67, 172.67.211.88
IPv6 hints2606:4700:3033::6815:5b43, 2606:4700:3037::ac43:d358
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=124, name=cloudflare-ech.com

dtwo.com.cn

DNSSEC⚠️ Not signed
A2606:4700:3033::6815:5b43🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:d358🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.91.67Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.211.88🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSizabella.ns.cloudflare.com ⭐
NSterin.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.91.67, 172.67.211.88
IPv6 hints2606:4700:3033::6815:5b43, 2606:4700:3037::ac43:d358
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=124, name=cloudflare-ech.com
SOAizabella.ns.cloudflare.comdns@cloudflare.com serial=2397798721

Previously MX for

dtwo.com.cn

Same first word

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DNS History

4 records (4 active, 0 former)

A104.21.91.67172.67.211.882606:4700:3033::6815:5b432606:4700:3037::ac43:d358
●A104.21.91.672026-04-07 → 2026-04-13 · 2 obs
● 2026-04-07 19:10:30
● 2026-04-13 08:40:28
●A172.67.211.882026-04-07 → 2026-04-13 · 2 obs
● 2026-04-07 19:10:30
● 2026-04-13 08:40:28
●A2606:4700:3033::6815:5b432026-04-07 → 2026-04-13 · 2 obs
● 2026-04-07 19:10:30
● 2026-04-13 08:40:28
●A2606:4700:3037::ac43:d3582026-04-07 → 2026-04-13 · 2 obs
● 2026-04-07 19:10:30
● 2026-04-13 08:40:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cna.dns.cn, b.dns.cn, e.dns.cn, d.dns.cn...-
dtwo.com.cnterin.ns.cloudflare.com, izabella.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.193.236

NS records: terin.ns.cloudflare.com, izabella.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for dtwo.com.cn (unsigned zone)

⏱️ Timing

Total: 822ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.91.67, 172.67.211.88
AAAA22606:4700:3033::6815:5b43, 2606:4700:3037::ac43:d358
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

mail.dtwo.com.cn points to four IP numbers: 2606:4700:3033::6815:5b43, 2606:4700:3037::ac43:d358, 104.21.91.67 and 172.67.211.88.

Other host names, for instance www.shedon.co.il, www.almohsen-shop.com, www.yangfou.cn, www.coachingacademy.net and www.cqyhwy.com share IP numbers with mail.dtwo.com.cn.