www.learn2code.cz - robtex.com

www.learn2code.cz

DNSSEC⚠️ Not signed
A2606:4700:3036::6815:1df2🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::ac43:9601🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.29.242Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.150.1🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.29.242, 172.67.150.1
IPv62606:4700:3036::6815:1df2, 2606:4700:3036::ac43:9601

learn2code.cz

DNSSEC⚠️ Not signed
A2606:4700:3036::6815:1df2🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::ac43:9601🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.29.242Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.150.1🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSlewis.ns.cloudflare.com ⭐
NSlina.ns.cloudflare.com
MXmx1.websupport.sk ⭐
MXmx2.websupport.sk(100)
TXTfacebook-domain-verification=e2awutx2ytzwfxmh42yd3qfun4y855
TXTspf2.0/pra a mx include:_sid.websupport.sk ?all
TXTv=spf1 a mx include:_spf.websupport.sk ?all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.29.242, 172.67.150.1
IPv62606:4700:3036::6815:1df2, 2606:4700:3036::ac43:9601
SOAlewis.ns.cloudflare.comdns@cloudflare.com serial=2399752198

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DNS History

7 records (4 active, 3 former)

20192020202120222023202420252026A104.21.29.242172.67.150.12606:4700:3036::6815:1df22606:4700:3036::ac43:9601172.64.80.12606:4700:130:436c:6f75:6466:6c61:7265CNAMEwww.learn2code.cz.herokudns.com
●A104.21.29.2422026-03-01 → 2026-03-25 · 10 obs
● 2026-03-01 14:03:58
○ 2026-03-03 00:36:18
● 2026-03-05 11:55:18
● 2026-03-07 04:27:04
○ 2026-03-07 06:23:58
● 2026-03-07 13:37:08
● 2026-03-15 15:37:40
○ 2026-03-18 02:34:10
● 2026-03-18 10:04:54
● 2026-03-25 06:06:32
○A172.64.80.12026-03-03 → 2026-03-18 · 10 obs
○ 2026-03-01 14:03:58
● 2026-03-03 00:36:18
○ 2026-03-05 11:55:18
○ 2026-03-07 04:27:04
● 2026-03-07 06:23:58
○ 2026-03-07 13:37:08
○ 2026-03-15 15:37:40
● 2026-03-18 02:34:10
○ 2026-03-18 10:04:54
○ 2026-03-25 06:06:32
●A172.67.150.12026-03-01 → 2026-03-25 · 10 obs
● 2026-03-01 14:03:58
○ 2026-03-03 00:36:18
● 2026-03-05 11:55:18
● 2026-03-07 04:27:04
○ 2026-03-07 06:23:58
● 2026-03-07 13:37:08
● 2026-03-15 15:37:40
○ 2026-03-18 02:34:10
● 2026-03-18 10:04:54
● 2026-03-25 06:06:32
○A2606:4700:130:436c:6f75:6466:6c61:72652026-03-18 → 2026-03-18 · 5 obs
○ 2026-03-01 14:03:58
○ 2026-03-15 15:37:40
● 2026-03-18 02:34:10
○ 2026-03-18 10:04:54
○ 2026-03-25 06:06:32
●A2606:4700:3036::6815:1df22026-03-01 → 2026-03-25 · 5 obs
● 2026-03-01 14:03:58
● 2026-03-15 15:37:40
○ 2026-03-18 02:34:10
● 2026-03-18 10:04:54
● 2026-03-25 06:06:32
●A2606:4700:3036::ac43:96012026-03-01 → 2026-03-25 · 5 obs
● 2026-03-01 14:03:58
● 2026-03-15 15:37:40
○ 2026-03-18 02:34:10
● 2026-03-18 10:04:54
● 2026-03-25 06:06:32
○CNAMEwww.learn2code.cz.herokudns.com2018-05-10 → 2018-05-10 · 3 obs
● 2018-05-10 22:39:38
○ 2026-03-01 14:03:58
○ 2026-03-25 06:06:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
czb.ns.nic.cz, d.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz-
learn2code.czlewis.ns.cloudflare.com, lina.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.192.187

NS records: lewis.ns.cloudflare.com, lina.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for learn2code.cz (unsigned zone)

⏱️ Timing

Total: 685ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.150.1, 104.21.29.242
AAAA22606:4700:3036::ac43:9601, 2606:4700:3036::6815:1df2
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

www.learn2code.cz resolves to four IP numbers: 2606:4700:3036::6815:1df2, 2606:4700:3036::ac43:9601, 104.21.29.242 and 172.67.150.1.

other host names for instance activellc.net, www.c-nova.net, connect.gizmodo.co.com, adonisprojects.in and wordkeg.com share IP numbers with www.learn2code.cz.