www.fullstack.courses - robtex.com

www.fullstack.courses

DNSSEC⚠️ Not signed
A2606:4700:3033::6815:4524🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:cb9d🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.69.36Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.203.157🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.69.36, 172.67.203.157
IPv62606:4700:3033::6815:4524, 2606:4700:3035::ac43:cb9d

fullstack.courses

DNSSEC⚠️ Not signed
A2606:4700:3033::6815:4524🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:cb9d🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.69.36Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.203.157🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSamber.ns.cloudflare.com ⭐
NSbradley.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.69.36, 172.67.203.157
IPv62606:4700:3033::6815:4524, 2606:4700:3035::ac43:cb9d
SOAamber.ns.cloudflare.comdns@cloudflare.com serial=2398778646

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DNS History

5 records (4 active, 1 former)

202120222023202420252026A104.21.69.36172.67.203.1572606:4700:3033::6815:45242606:4700:3035::ac43:cb9d18.197.39.198
●A104.21.69.362026-02-21 → 2026-04-01 · 3 obs
○ 2020-04-07 16:06:36
● 2026-02-21 04:37:12
● 2026-04-01 15:48:28
●A172.67.203.1572026-02-21 → 2026-04-01 · 3 obs
○ 2020-04-07 16:06:36
● 2026-02-21 04:37:12
● 2026-04-01 15:48:28
○A18.197.39.1982020-04-07 → 2020-04-07 · 3 obs
● 2020-04-07 16:06:36
○ 2026-02-21 04:37:12
○ 2026-04-01 15:48:28
●A2606:4700:3033::6815:45242026-02-21 → 2026-04-01 · 3 obs
○ 2020-04-07 16:06:36
● 2026-02-21 04:37:12
● 2026-04-01 15:48:28
●A2606:4700:3035::ac43:cb9d2026-02-21 → 2026-04-01 · 3 obs
○ 2020-04-07 16:06:36
● 2026-02-21 04:37:12
● 2026-04-01 15:48:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coursesa.nic.courses, b.nic.courses, c.nic.courses, x.nic.courses...12 records
fullstack.coursesamber.ns.cloudflare.com, bradley.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.58.64

NS records: amber.ns.cloudflare.com, bradley.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for fullstack.courses (unsigned zone)

⏱️ Timing

Total: 249ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.69.36, 172.67.203.157
AAAA22606:4700:3033::6815:4524, 2606:4700:3035::ac43:cb9d
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (a.nic.courses, b.nic.courses, c.nic.courses...)

Analysis

IP Addresses

www.fullstack.courses maps to four IP numbers: 2606:4700:3033::6815:4524, 2606:4700:3035::ac43:cb9d, 104.21.69.36 and 172.67.203.157.

Other host names, for instance www.womenshealthandfitness.com.au, paragonn.com, storage.vexmanga.com, casino-blacklist.net and worldagfellowship.org share IP numbers with www.fullstack.courses.