google-colab.com - robtex.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 ⭐
A2606:4700:58::a29f:2c0d🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrex.ns.cloudflare.com
A2803:f800:50::6ca2:c30d🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRrex.ns.cloudflare.com
A2a06:98c1:50::ac40:230d🇺🇸 Cloudflare2a06:98c1:50::/45
PTRrex.ns.cloudflare.com
A108.162.195.13🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrex.ns.cloudflare.com
A162.159.44.13Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrex.ns.cloudflare.com
A172.64.35.13🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrex.ns.cloudflare.com
NSzara.ns.cloudflare.com
A2606:4700:50::adf5:3a94🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRzara.ns.cloudflare.com
A2803:f800:50::6ca2:c094🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRzara.ns.cloudflare.com
A2a06:98c1:50::ac40:2094🇺🇸 Cloudflare2a06:98c1:50::/45
PTRzara.ns.cloudflare.com
A108.162.192.148🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRzara.ns.cloudflare.com
A172.64.32.148🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRzara.ns.cloudflare.com
A173.245.58.148🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRzara.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=230, name=cloudflare-ech.com
SOArex.ns.cloudflare.comdns@cloudflare.com serial=2410080000

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1786008309

Same first word

google-colab.com

DNS History

10 records (6 active, 4 former)

2020202120222023202420252026NSrex.ns.cloudflare.comzara.ns.cloudflare.comns1.bluehost.comns2.bluehost.comMXmail.google-colab.comA104.21.58.81172.67.157.2502606:4700:3036::6815:3a512606:4700:3037::ac43:9dfa162.241.218.238
○NSns1.bluehost.com2019-12-17 → 2019-12-17 · 3 obs
● 2019-12-17 06:30:36
○ 2026-07-21 05:35:02
○ 2026-08-06 09:32:14
○NSns2.bluehost.com2019-12-17 → 2019-12-17 · 3 obs
● 2019-12-17 06:30:36
○ 2026-07-21 05:35:02
○ 2026-08-06 09:32:14
●NSrex.ns.cloudflare.com2026-07-21 → 2026-08-06 · 3 obs
○ 2019-12-17 06:30:36
● 2026-07-21 05:35:02
● 2026-08-06 09:32:14
●NSzara.ns.cloudflare.com2026-07-21 → 2026-08-06 · 3 obs
○ 2019-12-17 06:30:36
● 2026-07-21 05:35:02
● 2026-08-06 09:32:14
○MXmail.google-colab.com2019-12-17 → 2019-12-17 · 3 obs
● 2019-12-17 06:30:36
○ 2026-07-21 05:35:02
○ 2026-08-06 09:32:14
●A104.21.58.812026-07-21 → 2026-08-06 · 3 obs
○ 2019-12-17 06:30:36
● 2026-07-21 05:35:02
● 2026-08-06 09:32:14
○A162.241.218.2382019-12-17 → 2019-12-17 · 3 obs
● 2019-12-17 06:30:36
○ 2026-07-21 05:35:02
○ 2026-08-06 09:32:14
●A172.67.157.2502026-07-21 → 2026-08-06 · 3 obs
○ 2019-12-17 06:30:36
● 2026-07-21 05:35:02
● 2026-08-06 09:32:14
●A2606:4700:3036::6815:3a512026-07-21 → 2026-08-06 · 3 obs
○ 2019-12-17 06:30:36
● 2026-07-21 05:35:02
● 2026-08-06 09:32:14
●A2606:4700:3037::ac43:9dfa2026-07-21 → 2026-08-06 · 3 obs
○ 2019-12-17 06:30:36
● 2026-07-21 05:35:02
● 2026-08-06 09:32:14

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comi.gtld-servers.net, k.gtld-servers.net, a.gtld-servers.net, c.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: 185ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.157.250, 104.21.58.81
AAAA22606:4700:3036::6815:3a51, 2606:4700:3037::ac43:9dfa
NS2rex.ns.cloudflare.com, zara.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1rex.ns.cloudflare.com dns.cloudflare.com

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

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.

Among the host names that share IP numbers with google-colab.com are lescasinosgratuits.com, gamergallery.net, www.malankaraworld.com and two others.

Name Servers

Two name servers handle the delegation for google-colab.com: rex.ns.cloudflare.com and zara.ns.cloudflare.com.

google-colab.com has the same name server delegation as a number of other domains, such as rayyanep.com, ecms.org.au, auvanta.ai and two more.

There is at least partial name server overlap between google-colab.com and other domains — rpservers.com, bos868-a.space, nontenda.eu and two more among them.

These name servers tend to appear in combination with the name servers heather.ns.cloudflare.com, iris.ns.cloudflare.com, ligia.ns.cloudflare.com and lilith.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

rex.ns.cloudflare.com resolves to 108.162.195.13, 162.159.44.13 and 172.64.35.13 among others, with 3 other IP addresses in total.

zara.ns.cloudflare.com resolves to 108.162.192.148, 172.64.32.148 and 173.245.58.148 among others, with 3 other IP addresses in total.