bestcourses.io - robtex.com
bestcourses.io
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3031::6815:5cdf🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3031::ac43:c728🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.92.223Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.199.40🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | camilo.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:58::a29f:2c76🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | camilo.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c376🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | camilo.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2376🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | camilo.ns.cloudflare.com | ||||||
| A | 108.162.195.118🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | camilo.ns.cloudflare.com | ||||||
| A | 162.159.44.118Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | camilo.ns.cloudflare.com | ||||||
| A | 172.64.35.118🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | camilo.ns.cloudflare.com | ||||||
| NS | itzel.ns.cloudflare.com | ||||||
| A | 2606:4700:50::a29f:262a🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | itzel.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c22a🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | itzel.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:222a🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | itzel.ns.cloudflare.com | ||||||
| A | 108.162.194.42🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | itzel.ns.cloudflare.com | ||||||
| A | 162.159.38.42Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | itzel.ns.cloudflare.com | ||||||
| A | 172.64.34.42🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | itzel.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.92.223, 172.67.199.40 | ||||||
| IPv6 hints | 2606:4700:3031::6815:5cdf, 2606:4700:3031::ac43:c728 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=70, name=cloudflare-ech.com | ||||||
| SOA | camilo.ns.cloudflare.comdns@cloudflare.com serial=2409070611 | ||||||
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=1784462581 | ||||||
Same first word
bestcourses.net |
bestcourses.org.uk |
bestcourses.co |
bestcourses.com |
bestcourses.store |
bestcourses.online |
bestcourses.io |
DNS History
8 records (6 active, 2 former)
●NScamilo.ns.cloudflare.com2026-05-21 → 2026-07-19 · 2 obs
● 2026-07-19 12:29:02
●NSitzel.ns.cloudflare.com2026-05-21 → 2026-07-19 · 2 obs
● 2026-07-19 12:29:02
●A104.21.92.2232026-05-21 → 2026-07-19 · 2 obs
● 2026-07-19 12:29:02
●A172.67.199.402026-05-21 → 2026-07-19 · 2 obs
● 2026-07-19 12:29:02
●A2606:4700:3031::6815:5cdf2026-07-19 → 2026-07-19 · 2 obs
● 2026-07-19 12:29:02
●A2606:4700:3031::ac43:c7282026-07-19 → 2026-07-19 · 2 obs
● 2026-07-19 12:29:02
○A2606:4700:3035::6815:5cdf2026-05-21 → 2026-06-13 · 3 obs
● 2026-06-13 08:11:02
○ 2026-07-19 12:29:02
○A2606:4700:3035::ac43:c7282026-05-21 → 2026-06-13 · 3 obs
● 2026-06-13 08:11:02
○ 2026-07-19 12:29:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| io | a2.nic.io, a0.nic.io, c0.nic.io, b0.nic.io | - |
| bestcourses.io | camilo.ns.cloudflare.com, itzel.ns.cloudflare.com | - |
✅ Authoritative Response
Server:108.162.194.42
NS records: camilo.ns.cloudflare.com, itzel.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for bestcourses.io (unsigned zone)
⏱️ Timing
Total: 247ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.199.40, 104.21.92.223 |
| AAAA | 2 | 2606:4700:3031::ac43:c728, 2606:4700:3031::6815:5cdf |
| NS | 2 | camilo.ns.cloudflare.com, itzel.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | camilo.ns.cloudflare.com dns.cloudflare. |
Analysis
IP Addresses
bestcourses.io has four IP addresses: 104.21.92.223, 172.67.199.40, 2606:4700:3031::6815:5cdf and 2606:4700:3031::ac43:c728.
Among the host names that share IP numbers with bestcourses.io are wholegreenbakery.com, lemaiga.com, off.gay and two others.
Name Servers
bestcourses.io is delegated to two name servers: camilo.ns.cloudflare.com and itzel.ns.cloudflare.com.
bestcourses.io has the same name server delegation as a number of other domains, such as dingqiaoren.cc, statoil.io, popat.io and two more.
bestcourses.io shares at least some of its name servers with other domains, including gzi8998-ddns0721.eu, russpain.com, betclubgirisi.com and two others.
These name servers are frequently paired with the name servers rory.ns.cloudflare.com, sasha.ns.cloudflare.com and maria.ns.cloudflare.com.
Host names resolving to 6 IP numbers:
camilo.ns.cloudflare.com resolves to 108.162.195.118, 162.159.44.118, 172.64.35.118 and 3 other IP addresses.
itzel.ns.cloudflare.com resolves to 108.162.194.42, 162.159.38.42, 172.64.34.42 and 3 other IP addresses.