mail.51intel.com - robtex.com

mail.51intel.com

DNSSEC⚠️ Not signed
A2606:4700:3031::ac43:9fb8🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::6815:95a🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.9.90Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.159.184🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.9.90, 172.67.159.184
IPv6 hints2606:4700:3031::ac43:9fb8, 2606:4700:3034::6815:95a
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=252, name=cloudflare-ech.com

51intel.com

DNSSEC⚠️ Not signed
A2606:4700:3031::ac43:9fb8🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::6815:95a🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.9.90Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.159.184🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSclarissa.ns.cloudflare.com ⭐
NScraig.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.9.90, 172.67.159.184
IPv6 hints2606:4700:3031::ac43:9fb8, 2606:4700:3034::6815:95a
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=252, name=cloudflare-ech.com
SOAclarissa.ns.cloudflare.comdns@cloudflare.com serial=2407852823

Previously MX for

51intel.com

Same first word

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DNS History

5 records (4 active, 1 former)

20162017201820192020202120222023202420252026NSns1.51dns.comA104.21.9.90172.67.159.1842606:4700:3031::ac43:9fb82606:4700:3034::6815:95a
○NSns1.51dns.com2015-08-03 → 2015-08-03 · 2 obs
● 2015-08-03 19:15:22
○ 2026-07-05 08:06:26
●A104.21.9.902026-07-05 → 2026-07-05 · 1 obs
● 2026-07-05 08:06:26
●A172.67.159.1842026-07-05 → 2026-07-05 · 1 obs
● 2026-07-05 08:06:26
●A2606:4700:3031::ac43:9fb82026-07-05 → 2026-07-05 · 1 obs
● 2026-07-05 08:06:26
●A2606:4700:3034::6815:95a2026-07-05 → 2026-07-05 · 1 obs
● 2026-07-05 08:06:26

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
51intel.comclarissa.ns.cloudflare.com, craig.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.195.192

NS records: clarissa.ns.cloudflare.com, craig.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51intel.com (unsigned zone)

⏱️ Timing

Total: 66ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.9.90, 172.67.159.184
AAAA22606:4700:3034::6815:95a, 2606:4700:3031::ac43:9fb8
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

mail.51intel.com points to the four IP addresses 104.21.9.90, 172.67.159.184, 2606:4700:3031::ac43:9fb8 and 2606:4700:3034::6815:95a.

Additional host names — chatgpt.xzchen.workers.dev, aster-dex.pro, amp.hpimt.org and two others — share IP numbers with mail.51intel.com.