opencourse.golf - robtex.com
opencourse.golf
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3030::ac43:ab22🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3034::6815:2f77🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.47.119Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.171.34🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | amanda.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:50::adf5:3a3f🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | amanda.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c03f🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | amanda.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:203f🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | amanda.ns.cloudflare.com | ||||||
| A | 108.162.192.63🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | amanda.ns.cloudflare.com | ||||||
| A | 172.64.32.63🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | amanda.ns.cloudflare.com | ||||||
| A | 173.245.58.63🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | amanda.ns.cloudflare.com | ||||||
| NS | lochlan.ns.cloudflare.com | ||||||
| A | 2606:4700:58::a29f:2cea🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | lochlan.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c3ea🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | lochlan.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:23ea🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | lochlan.ns.cloudflare.com | ||||||
| A | 108.162.195.234🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | lochlan.ns.cloudflare.com | ||||||
| A | 162.159.44.234Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | lochlan.ns.cloudflare.com | ||||||
| A | 172.64.35.234🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | lochlan.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.47.119, 172.67.171.34 | ||||||
| IPv6 hints | 2606:4700:3030::ac43:ab22, 2606:4700:3034::6815:2f77 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=201, name=cloudflare-ech.com | ||||||
| SOA | amanda.ns.cloudflare.comdns@cloudflare.com serial=2412017970 | ||||||
golf
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | v0n0.nic.golf ⭐ | ||||||
| NS | v0n1.nic.golf | ||||||
| NS | v0n2.nic.golf | ||||||
| NS | v0n3.nic.golf | ||||||
| NS | v2n0.nic.golf | ||||||
| NS | v2n1.nic.golf | ||||||
| SOA | v0n0.nic.golfhostmaster@donuts.email serial=1786646108 | ||||||
Same first word
opencourse.kr |
opencourse.co |
opencourse.org |
opencourse.ru |
opencourse.de |
opencourse.co.uk |
opencourse.it |
opencourse.net |
opencourse.com.cn |
opencourse.fr |
opencourse.com |
opencourse.golf |
opencourse.info |
Similar names
DNS History
10 records (6 active, 4 former)
●NSamanda.ns.cloudflare.com2026-08-04 → 2026-08-13 · 2 obs
● 2026-08-13 18:54:42
●NSlochlan.ns.cloudflare.com2026-08-04 → 2026-08-13 · 2 obs
● 2026-08-13 18:54:42
●A104.21.47.1192026-08-13 → 2026-08-13 · 2 obs
● 2026-08-13 18:54:42
●A172.67.171.342026-08-13 → 2026-08-13 · 2 obs
● 2026-08-13 18:54:42
○A188.114.96.02026-08-04 → 2026-08-04 · 2 obs
○ 2026-08-13 18:54:42
○A188.114.97.02026-08-04 → 2026-08-04 · 2 obs
○ 2026-08-13 18:54:42
●A2606:4700:3030::ac43:ab222026-08-13 → 2026-08-13 · 2 obs
● 2026-08-13 18:54:42
●A2606:4700:3034::6815:2f772026-08-13 → 2026-08-13 · 2 obs
● 2026-08-13 18:54:42
○A2a06:98c1:3120::2026-08-04 → 2026-08-04 · 2 obs
○ 2026-08-13 18:54:42
○A2a06:98c1:3121::2026-08-04 → 2026-08-04 · 2 obs
○ 2026-08-13 18:54:42
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| golf | v2n0.nic.golf, v2n1.nic.golf, v0n0.nic.golf, v0n2.nic.golf... | 12 records |
| opencourse.golf | amanda.ns.cloudflare.com, lochlan.ns.cloudflare.com | - |
✅ Authoritative Response
Server:162.159.44.234
NS records: amanda.ns.cloudflare.com, lochlan.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for opencourse.golf (unsigned zone)
⏱️ Timing
Total: 428ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.47.119, 172.67.171.34 |
| AAAA | 2 | 2606:4700:3034::6815:2f77, 2606:4700:3030::ac43:ab22 |
| NS | 2 | amanda.ns.cloudflare.com, lochlan.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | amanda.ns.cloudflare.com dns.cloudflare. |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (v2n1.nic.golf, v2n0.nic.golf, v0n3.nic.golf...)
Analysis
IP Addresses
opencourse.golf points to the four IP addresses 104.21.47.119, 172.67.171.34, 2606:4700:3030::ac43:ab22 and 2606:4700:3034::6815:2f77.
Two other host names, along with www.somza.to, andrefarma.tokefacts.com and mail.stave.com, also share IP numbers with opencourse.golf.
Name Servers
Two name servers handle the delegation for opencourse.golf: amanda.ns.cloudflare.com and lochlan.ns.cloudflare.com.
opencourse.golf shares its NS records with other domains, for example belziumconsulting.com, readminute.com, uswatergrade.com and two others.
The name servers of opencourse.golf overlap at least partially with those of other domains — among them iaaonline.net, erlipton.com, sell21.com and two more.
The name servers elle.ns.cloudflare.com, colin.ns.cloudflare.com and andy.ns.cloudflare.com are commonly seen alongside these name servers.
DNS names with 6 IP addresses:
amanda.ns.cloudflare.com resolves to 108.162.192.63, 172.64.32.63 and 173.245.58.63 among others, with 3 other IP addresses in total.
lochlan.ns.cloudflare.com resolves to 108.162.195.234, 162.159.44.234 and 172.64.35.234 among others, with 3 other IP addresses in total.