mail.smstraining.org - robtex.com

mail.smstraining.org

DNSSEC⚠️ Not signed
A2606:4700:3036::6815:56be🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:881a🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.86.190Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.136.26🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.86.190, 172.67.136.26
IPv6 hints2606:4700:3036::6815:56be, 2606:4700:3037::ac43:881a
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=53, name=cloudflare-ech.com

smstraining.org

DNSSEC⚠️ Not signed
A2606:4700:3036::6815:56be🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:881a🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.86.190Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.136.26🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSdonna.ns.cloudflare.com ⭐
NSnash.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.86.190, 172.67.136.26
IPv6 hints2606:4700:3036::6815:56be, 2606:4700:3037::ac43:881a
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=53, name=cloudflare-ech.com
SOAdonna.ns.cloudflare.comdns@cloudflare.com serial=2409819384

Previously MX for

smstraining.org

Same first word

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DNS History

5 records (4 active, 1 former)

20192020202120222023202420252026A104.21.86.190172.67.136.262606:4700:3036::6815:56be2606:4700:3037::ac43:881a66.147.242.93
●A104.21.86.1902026-08-10 → 2026-08-10 · 2 obs
○ 2018-05-16 00:41:18
● 2026-08-10 17:06:50
●A172.67.136.262026-08-10 → 2026-08-10 · 2 obs
○ 2018-05-16 00:41:18
● 2026-08-10 17:06:50
●A2606:4700:3036::6815:56be2026-08-10 → 2026-08-10 · 2 obs
○ 2018-05-16 00:41:18
● 2026-08-10 17:06:50
●A2606:4700:3037::ac43:881a2026-08-10 → 2026-08-10 · 2 obs
○ 2018-05-16 00:41:18
● 2026-08-10 17:06:50
○A66.147.242.932018-05-16 → 2018-05-16 · 2 obs
● 2018-05-16 00:41:18
○ 2026-08-10 17:06:50

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org-
smstraining.orgnash.ns.cloudflare.com, donna.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.33.209

NS records: nash.ns.cloudflare.com, donna.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for smstraining.org (unsigned zone)

⏱️ Timing

Total: 306ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.86.190, 172.67.136.26
AAAA22606:4700:3036::6815:56be, 2606:4700:3037::ac43:881a
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

mail.smstraining.org has four IP addresses: 104.21.86.190, 172.67.136.26, 2606:4700:3036::6815:56be and 2606:4700:3037::ac43:881a.

Two other host names, along with ergohuman.com.tw, northlandsgolf.ca and gseias.com, also share IP numbers with mail.smstraining.org.