courseowner.com - robtex.com
courseowner.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3034::ac43:c2cb🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3035::6815:3426🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.52.38Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.194.203🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | cruz.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:50::adf5:3a58🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | cruz.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c058🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | cruz.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2058🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | cruz.ns.cloudflare.com | ||||||
| A | 108.162.192.88🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | cruz.ns.cloudflare.com | ||||||
| A | 172.64.32.88🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | cruz.ns.cloudflare.com | ||||||
| A | 173.245.58.88🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | cruz.ns.cloudflare.com | ||||||
| NS | donovan.ns.cloudflare.com | ||||||
| A | 2606:4700:58::a29f:2c72🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | donovan.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c372🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | donovan.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2372🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | donovan.ns.cloudflare.com | ||||||
| A | 108.162.195.114🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | donovan.ns.cloudflare.com | ||||||
| A | 162.159.44.114Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | donovan.ns.cloudflare.com | ||||||
| A | 172.64.35.114🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | donovan.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.21.52.38, 172.67.194.203 | ||||||
| IPv6 | 2606:4700:3034::ac43:c2cb, 2606:4700:3035::6815:3426 | ||||||
| SOA | cruz.ns.cloudflare.comdns@cloudflare.com serial=2398616594 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1774478742 | ||||||
Same first word
courseowner.com |
Similar names
DNS History
6 records (6 active, 0 former)
●NScruz.ns.cloudflare.com2026-03-09 → 2026-03-25 · 2 obs
● 2026-03-25 23:00:14
●NSdonovan.ns.cloudflare.com2026-03-09 → 2026-03-25 · 2 obs
● 2026-03-25 23:00:14
●A104.21.52.382026-03-09 → 2026-03-25 · 2 obs
● 2026-03-25 23:00:14
●A172.67.194.2032026-03-09 → 2026-03-25 · 2 obs
● 2026-03-25 23:00:14
●A2606:4700:3034::ac43:c2cb2026-03-09 → 2026-03-25 · 2 obs
● 2026-03-25 23:00:14
●A2606:4700:3035::6815:34262026-03-09 → 2026-03-25 · 2 obs
● 2026-03-25 23:00:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| courseowner.com | cruz.ns.cloudflare.com, donovan.ns.cloudflare.com | 12 records |
✅ Authoritative Response
Server:108.162.192.88
NS records: cruz.ns.cloudflare.com, donovan.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for courseowner.com (unsigned zone)
⏱️ Timing
Total: 217ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.194.203, 104.21.52.38 |
| AAAA | 2 | 2606:4700:3034::ac43:c2cb, 2606:4700:3035::6815:3426 |
| NS | 2 | cruz.ns.cloudflare.com, donovan.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | cruz.ns.cloudflare.com dns.cloudflare.co |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (cruz.ns.cloudflare.com, cruz.ns.cloudflare.com, cruz.ns.cloudflare.com...)
Analysis
IP Addresses
courseowner.com points to four IP numbers: 2606:4700:3034::ac43:c2cb, 2606:4700:3035::6815:3426, 104.21.52.38 and 172.67.194.203.
Other host names including kobe-voitore.com, www.816204.xin, biomasseenergieidf.org, wordskool.com and maxfer.com.br share IP numbers with courseowner.com.
Name Servers
courseowner.com's delegation uses two name servers, cruz.ns.cloudflare.com and donovan.ns.cloudflare.com.
courseowner.com shares the same name server setup as other domains, such as jeremiahone.net, automationpal.com, connect-rode.com and ps-lotterie-sparen.de.
courseowner.com at least partially shares name servers with other domains, including contentserv.co, heapepeir.pro, layslonline.com, freehunter.hk and appkl.click.
Host names with six IP numbers:
cruz.ns.cloudflare.com points to: 2606:4700:50::adf5:3a58, 2803:f800:50::6ca2:c058, 2a06:98c1:50::ac40:2058, 108.162.192.88, 172.64.32.88 and 173.245.58.88.
donovan.ns.cloudflare.com points to: 2606:4700:58::a29f:2c72, 2803:f800:50::6ca2:c372, 2a06:98c1:50::ac40:2372, 108.162.195.114, 162.159.44.114 and 172.64.35.114.