userpic.codeforces.org - robtex.com
userpic.codeforces.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3031::ac43:83be🇺🇸 Cloudflare ✓ In HTTPS hints | ||||||
| A | 2606:4700:3035::6815:afc🇺🇸 Cloudflare ✓ In HTTPS hints | ||||||
| A | 104.21.10.252 Cloudflare ✓ In HTTPS hints | ||||||
| A | 172.67.131.190🇺🇸 Cloudflare ✓ In HTTPS hints | ||||||
| HTTPS | HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.21.10.252, 172.67.131.190 | ||||||
| IPv6 | 2606:4700:3031::ac43:83be, 2606:4700:3035::6815:afc | ||||||
codeforces.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3031::ac43:83be🇺🇸 Cloudflare ✓ In HTTPS hints | ||||||
| A | 2606:4700:3035::6815:afc🇺🇸 Cloudflare ✓ In HTTPS hints | ||||||
| A | 104.21.10.252 Cloudflare ✓ In HTTPS hints | ||||||
| A | 172.67.131.190🇺🇸 Cloudflare ✓ In HTTPS hints | ||||||
| NS | fred.ns.cloudflare.com ⭐ | ||||||
| NS | jean.ns.cloudflare.com | ||||||
| HTTPS | HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.21.10.252, 172.67.131.190 | ||||||
| IPv6 | 2606:4700:3031::ac43:83be, 2606:4700:3035::6815:afc | ||||||
| SOA | fred.ns.cloudflare.comdns@cloudflare.com serial=2396735241 | ||||||
Same first word
Similar names
DNS History
4 records (4 active, 0 former)
●A104.21.10.2522026-02-19 → 2026-02-19 · 2 obs
● 2026-02-19 17:51:30
● 2026-02-19 17:51:34
● 2026-02-19 17:51:34
●A172.67.131.1902026-02-19 → 2026-02-19 · 2 obs
● 2026-02-19 17:51:30
● 2026-02-19 17:51:34
● 2026-02-19 17:51:34
●A2606:4700:3031::ac43:83be2026-02-19 → 2026-02-19 · 2 obs
● 2026-02-19 17:51:30
● 2026-02-19 17:51:34
● 2026-02-19 17:51:34
●A2606:4700:3035::6815:afc2026-02-19 → 2026-02-19 · 2 obs
● 2026-02-19 17:51:30
● 2026-02-19 17:51:34
● 2026-02-19 17:51:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org | - |
| codeforces.org | jean.ns.cloudflare.com, fred.ns.cloudflare.com | - |
✅ Authoritative Response
Server: 172.64.32.121
NS records: jean.ns.cloudflare.com, fred.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for codeforces.org (unsigned zone)
⏱️ Timing
Total: 350ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.10.252, 172.67.131.190 |
| AAAA | 2 | 2606:4700:3035::6815:afc, 2606:4700:3031::ac43:83be |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h2"] |
AI analysis
userpic.codeforces.org resolves to four IP numbers: 2606:4700:3031::ac43:83be, 2606:4700:3035::6815:afc, 104.21.10.252 and 172.67.131.190.
other host names for instance dzcp0000.com, sweet-bonanza-app.com, fordrinkers.org, arhsystems.com and mail.fordrinkers.org share IP numbers with userpic.codeforces.org.