www.fplot.courses - robtex.com
www.fplot.courses
| DNSSEC | ⚠️ Not signed | ||||||
| A | 104.21.26.240Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.168.156🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.26.240, 172.67.168.156 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=26, name=cloudflare-ech.com | ||||||
fplot.courses
| DNSSEC | ⚠️ Not signed | ||||||
| A | 104.21.26.240Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.168.156🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | noel.ns.cloudflare.com ⭐ | ||||||
| NS | tia.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.26.240, 172.67.168.156 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=26, name=cloudflare-ech.com | ||||||
| SOA | noel.ns.cloudflare.comdns@cloudflare.com serial=2409165710 | ||||||
Same first word
Similar names
DNS History
2 records (2 active, 0 former)
●A104.21.26.2402026-07-25 → 2026-08-17 · 2 obs
● 2026-07-25 15:27:34
● 2026-08-17 04:14:28
● 2026-08-17 04:14:28
●A172.67.168.1562026-07-25 → 2026-08-17 · 2 obs
● 2026-07-25 15:27:34
● 2026-08-17 04:14:28
● 2026-08-17 04:14:28
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| courses | a.nic.courses, b.nic.courses, c.nic.courses, x.nic.courses... | 12 records |
| fplot.courses | tia.ns.cloudflare.com, noel.ns.cloudflare.com | - |
✅ Authoritative Response
Server:172.64.33.216
NS records: tia.ns.cloudflare.com, noel.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for fplot.courses (unsigned zone)
⏱️ Timing
Total: 1525ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.26.240, 172.67.168.156 |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (a.nic.courses, a.nic.courses, b.nic.courses...)
Analysis
IP Addresses
www.fplot.courses points to the IP addresses 104.21.26.240 and 172.67.168.156
Additional host names — mega-muscles.com, synthetic-device.com, poona.io and two others — share IP numbers with www.fplot.courses.