mail.google-colab.com - robtex.com

mail.google-colab.com

DNSSEC⚠️ Not signed
A2606:4700:3036::6815:3a51🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:9dfa🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.58.81Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.157.250🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.58.81, 172.67.157.250
IPv6 hints2606:4700:3036::6815:3a51, 2606:4700:3037::ac43:9dfa
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=221, name=cloudflare-ech.com

google-colab.com

DNSSEC⚠️ Not signed
A2606:4700:3036::6815:3a51🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:9dfa🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.58.81Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.157.250🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSrex.ns.cloudflare.com ⭐
NSzara.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.58.81, 172.67.157.250
IPv6 hints2606:4700:3036::6815:3a51, 2606:4700:3037::ac43:9dfa
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=221, name=cloudflare-ech.com
SOArex.ns.cloudflare.comdns@cloudflare.com serial=2410080000

Previously MX for

google-colab.com

Same first word

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Similar names

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DNS History

5 records (4 active, 1 former)

2020202120222023202420252026A104.21.58.81172.67.157.2502606:4700:3036::6815:3a512606:4700:3037::ac43:9dfa162.241.218.238
●A104.21.58.812026-08-06 → 2026-08-06 · 2 obs
○ 2019-12-19 19:24:22
● 2026-08-06 11:53:22
○A162.241.218.2382019-12-19 → 2019-12-19 · 2 obs
● 2019-12-19 19:24:22
○ 2026-08-06 11:53:22
●A172.67.157.2502026-08-06 → 2026-08-06 · 2 obs
○ 2019-12-19 19:24:22
● 2026-08-06 11:53:22
●A2606:4700:3036::6815:3a512026-08-06 → 2026-08-06 · 2 obs
○ 2019-12-19 19:24:22
● 2026-08-06 11:53:22
●A2606:4700:3037::ac43:9dfa2026-08-06 → 2026-08-06 · 2 obs
○ 2019-12-19 19:24:22
● 2026-08-06 11:53:22

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
come.gtld-servers.net, i.gtld-servers.net, g.gtld-servers.net, a.gtld-servers.net...-
google-colab.comzara.ns.cloudflare.com, rex.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.192.148

NS records: zara.ns.cloudflare.com, rex.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for google-colab.com (unsigned zone)

⏱️ Timing

Total: 119ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.58.81, 172.67.157.250
AAAA22606:4700:3036::6815:3a51, 2606:4700:3037::ac43:9dfa
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

mail.google-colab.com points to the four IP addresses 104.21.58.81, 172.67.157.250, 2606:4700:3036::6815:3a51 and 2606:4700:3037::ac43:9dfa.

Additional host names — 7y4u.com.cdn.cloudflare.net, 82608kj.com, poplave.rs and two others — share IP numbers with mail.google-colab.com.