mail2.hr21.com.hk - robtex.com

mail2.hr21.com.hk

DNSSEC⚠️ Not signed
A2606:4700:3031::ac43:8c97🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3032::6815:4930🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.73.48Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.140.151🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.73.48, 172.67.140.151
IPv6 hints2606:4700:3031::ac43:8c97, 2606:4700:3032::6815:4930
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=5, name=cloudflare-ech.com

hr21.com.hk

DNSSEC⚠️ Not signed
A2606:4700:3031::ac43:8c97🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3032::6815:4930🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.73.48Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.140.151🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSkeanu.ns.cloudflare.com ⭐
NSrayne.ns.cloudflare.com
TXTgoogle-site-verification=XiMPZwXk5ayYZzq572OHp3WR-mJEvSj7XUQabKz2Ko8
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.73.48, 172.67.140.151
IPv6 hints2606:4700:3031::ac43:8c97, 2606:4700:3032::6815:4930
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=67, name=cloudflare-ech.com
SOAkeanu.ns.cloudflare.comdns@cloudflare.com serial=2401733940

Previously MX for

hr21.com.hk

Same first word

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mail2.you
mail2.no-ip.org
mail2.dev
mail2.cloudapp.net
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mail2.altervista.org

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DNS History

6 records (4 active, 2 former)

20162017201820192020202120222023202420252026A104.21.73.48172.67.140.1512606:4700:3031::ac43:8c972606:4700:3032::6815:4930203.129.67.192606:4700:130:436c:6f75:6466:6c61:7265
●A104.21.73.482026-02-23 → 2026-04-27 · 3 obs
○ 2016-04-11 06:20:50
● 2026-02-23 02:07:00
● 2026-04-27 01:09:38
●A172.67.140.1512026-02-23 → 2026-04-27 · 3 obs
○ 2016-04-11 06:20:50
● 2026-02-23 02:07:00
● 2026-04-27 01:09:38
○A203.129.67.192015-07-11 → 2016-04-11 · 4 obs
● 2015-07-11 09:48:38
● 2016-04-11 06:20:50
○ 2026-02-23 02:07:00
○ 2026-04-27 01:09:38
○A2606:4700:130:436c:6f75:6466:6c61:72652026-03-05 → 2026-03-13 · 6 obs
○ 2026-02-25 04:24:46
● 2026-03-05 03:55:56
○ 2026-03-13 21:01:28
● 2026-03-13 22:51:58
○ 2026-04-06 11:06:42
○ 2026-04-27 01:09:38
●A2606:4700:3031::ac43:8c972026-02-23 → 2026-04-27 · 8 obs
○ 2016-04-11 06:20:50
● 2026-02-23 02:07:00
● 2026-02-25 04:24:46
○ 2026-03-05 03:55:56
● 2026-03-13 21:01:28
○ 2026-03-13 22:51:58
● 2026-04-06 11:06:42
● 2026-04-27 01:09:38
●A2606:4700:3032::6815:49302026-02-23 → 2026-04-27 · 8 obs
○ 2016-04-11 06:20:50
● 2026-02-23 02:07:00
● 2026-02-25 04:24:46
○ 2026-03-05 03:55:56
● 2026-03-13 21:01:28
○ 2026-03-13 22:51:58
● 2026-04-06 11:06:42
● 2026-04-27 01:09:38

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
hkc.hkirc.net.hk, v.hkirc.net.hk, d.hkirc.net.hk, t.hkirc.net.hk...18 records
hr21.com.hkrayne.ns.cloudflare.com, keanu.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.34.11

NS records: rayne.ns.cloudflare.com, keanu.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for hr21.com.hk (unsigned zone)

⏱️ Timing

Total: 787ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.140.151, 104.21.73.48
AAAA22606:4700:3032::6815:4930, 2606:4700:3031::ac43:8c97
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 18

In-bailiwick: 18 (z.hkirc.net.hk, y.hkirc.net.hk, x.hkirc.net.hk...)

Analysis

IP Addresses

mail2.hr21.com.hk points to four IP numbers: 2606:4700:3031::ac43:8c97, 2606:4700:3032::6815:4930, 104.21.73.48 and 172.67.140.151.

Other host names, for instance langademy.com, mail.kartalklimaservis.net, icatch.jp, kartalklimaservis.net and launchyourself.com share IP numbers with mail2.hr21.com.hk.