practice.mathlessons.co - dns.ninja
practice.mathlessons.co
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3032::6815:4ab0🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3032::ac43:cca8🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.74.176Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.204.168🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.74.176, 172.67.204.168 | ||||||
| IPv6 hints | 2606:4700:3032::6815:4ab0, 2606:4700:3032::ac43:cca8 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=58, name=cloudflare-ech.com | ||||||
mathlessons.co
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3032::6815:4ab0🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3032::ac43:cca8🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.74.176Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.204.168🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | hugh.ns.cloudflare.com ⭐ | ||||||
| NS | jule.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.74.176, 172.67.204.168 | ||||||
| IPv6 hints | 2606:4700:3032::6815:4ab0, 2606:4700:3032::ac43:cca8 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=58, name=cloudflare-ech.com | ||||||
| SOA | hugh.ns.cloudflare.comdns@cloudflare.com serial=2411797526 | ||||||
Same first word
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DNS History
5 records (4 active, 1 former)
●A104.21.74.1762026-03-30 → 2026-08-10 · 2 obs
● 2026-03-30 20:00:08
● 2026-08-10 09:50:08
● 2026-08-10 09:50:08
●A172.67.204.1682026-03-30 → 2026-08-10 · 2 obs
● 2026-03-30 20:00:08
● 2026-08-10 09:50:08
● 2026-08-10 09:50:08
●A2606:4700:3032::6815:4ab02026-07-11 → 2026-08-10 · 3 obs
○ 2026-06-07 06:06:00
● 2026-07-11 02:11:28
● 2026-08-10 09:50:08
● 2026-07-11 02:11:28
● 2026-08-10 09:50:08
●A2606:4700:3032::ac43:cca82026-03-30 → 2026-08-10 · 2 obs
● 2026-03-30 20:00:08
● 2026-08-10 09:50:08
● 2026-08-10 09:50:08
○A2606:4700:3034::6815:4ab02026-03-30 → 2026-06-07 · 4 obs
● 2026-03-30 20:00:08
● 2026-06-07 06:06:00
○ 2026-07-11 02:11:28
○ 2026-08-10 09:50:08
● 2026-06-07 06:06:00
○ 2026-07-11 02:11:28
○ 2026-08-10 09:50:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| co | a.registrydns.co, b.registrydns.co, c.registrydns.co, d.registrydns.co | - |
| mathlessons.co | hugh.ns.cloudflare.com, jule.ns.cloudflare.com | - |
✅ Authoritative Response
Server:172.64.33.117
NS records: hugh.ns.cloudflare.com, jule.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for mathlessons.co (unsigned zone)
⏱️ Timing
Total: 768ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.74.176, 172.67.204.168 |
| AAAA | 2 | 2606:4700:3032::6815:4ab0, 2606:4700:3032::ac43:cca8 |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
Analysis
IP Addresses
practice.mathlessons.co points to the four IP addresses 104.21.74.176, 172.67.204.168, 2606:4700:3032::6815:4ab0 and 2606:4700:3032::ac43:cca8.
Additional host names — pixelfour.com, www.booknation.ro, adeptcore.com and two others — share IP numbers with practice.mathlessons.co.