pythonmastery.io - robtex.com
pythonmastery.io
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3030::ac43:9d6fCloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3033::6815:4a6dCloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.74.109Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.157.111Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | brett.ns.cloudflare.com ⭐ | ||||||
| NS | clara.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.74.109, 172.67.157.111 | ||||||
| IPv6 hints | 2606:4700:3030::ac43:9d6f, 2606:4700:3033::6815:4a6d | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=228, name=cloudflare-ech.com | ||||||
| SOA | brett.ns.cloudflare.comdns@cloudflare.com serial=2418369255 | ||||||
io
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.nic.io ⭐ | ||||||
| NS | a2.nic.io | ||||||
| NS | b0.nic.io | ||||||
| NS | c0.nic.io | ||||||
| SOA | a0.nic.iohostmaster@donuts.email serial=1794034351 | ||||||
Same first word
pythonmastery.io |
pythonmastery.club |
pythonmastery.courses |
DNS History
15 records (6 active, 9 former)
●NSbrett.ns.cloudflare.com2026-10-25 → 2026-11-07 · 3 obs
○ 2026-10-07 15:58:10
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
●NSclara.ns.cloudflare.com2026-10-25 → 2026-11-07 · 3 obs
○ 2026-10-07 15:58:10
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
○NSdns1.p01.nsone.net2026-10-07 → 2026-10-07 · 3 obs
● 2026-10-07 15:58:10
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
○NSdns1.p07.nsone.net2026-10-07 → 2026-10-07 · 3 obs
● 2026-10-07 15:58:10
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
○NSdns2.p07.nsone.net2026-10-07 → 2026-10-07 · 3 obs
● 2026-10-07 15:58:10
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
○NSdns3.p07.nsone.net2026-10-07 → 2026-10-07 · 3 obs
● 2026-10-07 15:58:10
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
○NSdns4.p07.nsone.net2026-10-07 → 2026-10-07 · 3 obs
● 2026-10-07 15:58:10
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
●A104.21.74.1092026-10-25 → 2026-11-07 · 3 obs
○ 2026-10-23 12:46:24
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
●A172.67.157.1112026-10-25 → 2026-11-07 · 3 obs
○ 2026-10-23 12:46:24
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
○A18.208.88.1572026-10-23 → 2026-10-23 · 4 obs
○ 2026-10-07 15:58:10
● 2026-10-23 12:46:24
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
● 2026-10-23 12:46:24
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
●A2606:4700:3030::ac43:9d6f2026-10-25 → 2026-11-07 · 3 obs
○ 2026-10-23 12:46:24
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
●A2606:4700:3033::6815:4a6d2026-10-25 → 2026-11-07 · 3 obs
○ 2026-10-23 12:46:24
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
● 2026-10-25 17:09:48
● 2026-11-07 07:35:10
○A35.157.26.1352026-10-07 → 2026-10-07 · 3 obs
● 2026-10-07 15:58:10
○ 2026-10-23 12:46:24
○ 2026-11-07 07:35:10
○ 2026-10-23 12:46:24
○ 2026-11-07 07:35:10
○A63.176.8.2182026-10-07 → 2026-10-07 · 3 obs
● 2026-10-07 15:58:10
○ 2026-10-23 12:46:24
○ 2026-11-07 07:35:10
○ 2026-10-23 12:46:24
○ 2026-11-07 07:35:10
○A98.84.224.1112026-10-23 → 2026-10-23 · 4 obs
○ 2026-10-07 15:58:10
● 2026-10-23 12:46:24
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
● 2026-10-23 12:46:24
○ 2026-10-25 17:09:48
○ 2026-11-07 07:35:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| io | b0.nic.io, c0.nic.io, a0.nic.io, a2.nic.io | - |
| pythonmastery.io | clara.ns.cloudflare.com, brett.ns.cloudflare.com | - |
✅ Authoritative Response
Server:172.64.33.76
NS records: clara.ns.cloudflare.com, brett.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for pythonmastery.io (unsigned zone)
⏱️ Timing
Total: 1542ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.157.111, 104.21.74.109 |
| AAAA | 2 | 2606:4700:3030::ac43:9d6f, 2606:4700:3033::6815:4a6d |
| NS | 2 | brett.ns.cloudflare.com, clara.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | brett.ns.cloudflare.com dns.cloudflare.c |
Analysis
IP Addresses
pythonmastery.io points to the four IP addresses 104.21.74.109, 172.67.157.111, 2606:4700:3030::ac43:9d6f and 2606:4700:3033::6815:4a6d.
Name Servers
pythonmastery.io is delegated to two name servers, brett.ns.cloudflare.com and clara.ns.cloudflare.com.