mailin1.learn2code.cz - robtex.com
mailin1.learn2code.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3036::6815:1df2🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3036::ac43:9601🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.29.242Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.150.1🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.29.242, 172.67.150.1 | ||||||
| IPv6 hints | 2606:4700:3036::6815:1df2, 2606:4700:3036::ac43:9601 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=203, name=cloudflare-ech.com | ||||||
learn2code.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3036::6815:1df2🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3036::ac43:9601🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.29.242Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.150.1🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | lewis.ns.cloudflare.com ⭐ | ||||||
| NS | lina.ns.cloudflare.com | ||||||
| MX | mx1.websupport.sk ⭐ | ||||||
| MX | mx2.websupport.sk(100) | ||||||
| TXT | facebook-domain-verification=e2awutx2ytzwfxmh42yd3qfun4y855 | ||||||
| TXT | spf2.0/pra a mx include:_sid.websupport.sk ?all | ||||||
| TXT | v=spf1 a mx include:_spf.websupport.sk ?all | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.29.242, 172.67.150.1 | ||||||
| IPv6 hints | 2606:4700:3036::6815:1df2, 2606:4700:3036::ac43:9601 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=203, name=cloudflare-ech.com | ||||||
| SOA | lewis.ns.cloudflare.comdns@cloudflare.com serial=2402065370 | ||||||
Previously MX for
DNS History
5 records (4 active, 1 former)
●A104.21.29.2422026-05-10 → 2026-05-10 · 2 obs
○ 2016-07-12 02:14:14
● 2026-05-10 09:34:38
● 2026-05-10 09:34:38
●A172.67.150.12026-05-10 → 2026-05-10 · 2 obs
○ 2016-07-12 02:14:14
● 2026-05-10 09:34:38
● 2026-05-10 09:34:38
●A2606:4700:3036::6815:1df22026-05-10 → 2026-05-10 · 2 obs
○ 2016-07-12 02:14:14
● 2026-05-10 09:34:38
● 2026-05-10 09:34:38
●A2606:4700:3036::ac43:96012026-05-10 → 2026-05-10 · 2 obs
○ 2016-07-12 02:14:14
● 2026-05-10 09:34:38
● 2026-05-10 09:34:38
○A37.9.169.1122015-08-18 → 2016-07-12 · 3 obs
● 2015-08-18 14:10:28
● 2016-07-12 02:14:14
○ 2026-05-10 09:34:38
● 2016-07-12 02:14:14
○ 2026-05-10 09:34:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| learn2code.cz | lina.ns.cloudflare.com, lewis.ns.cloudflare.com | - |
✅ Authoritative Response
Server:108.162.195.159
NS records: lina.ns.cloudflare.com, lewis.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for learn2code.cz (unsigned zone)
⏱️ Timing
Total: 616ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.29.242, 172.67.150.1 |
| AAAA | 2 | 2606:4700:3036::ac43:9601, 2606:4700:3036::6815:1df2 |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
Analysis
IP Addresses
mailin1.learn2code.cz maps 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 such as microsoft-online.tonitoh327.workers.dev, lakatanlayer.click, wa.io, www.liujiaoshui.com and ynjjt.com share IPs with mailin1.learn2code.cz.