courscool.com - robtex.com
courscool.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3030::6815:71f🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3033::ac43:87ad🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.7.31Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.135.173🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | amos.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:58::a29f:2c78🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | amos.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c378🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | amos.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2378🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | amos.ns.cloudflare.com | ||||||
| A | 108.162.195.120🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | amos.ns.cloudflare.com | ||||||
| A | 162.159.44.120Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | amos.ns.cloudflare.com | ||||||
| A | 172.64.35.120🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | amos.ns.cloudflare.com | ||||||
| NS | ligia.ns.cloudflare.com | ||||||
| A | 2606:4700:50::a29f:2604🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ligia.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c204🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | ligia.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2204🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | ligia.ns.cloudflare.com | ||||||
| A | 108.162.194.4🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ligia.ns.cloudflare.com | ||||||
| A | 162.159.38.4Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ligia.ns.cloudflare.com | ||||||
| A | 172.64.34.4🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ligia.ns.cloudflare.com | ||||||
| MX | eforward1.registrar-servers.com ⭐ | ||||||
| A | 162.255.118.51🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES | ||||||
| PTR | eforward1.registrar-servers.com | ||||||
| PTR | eforward3.registrar-servers.com | ||||||
| MX | eforward2.registrar-servers.com ⭐ | ||||||
| A | 162.255.118.52🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES | ||||||
| PTR | eforward2.registrar-servers.com | ||||||
| MX | eforward3.registrar-servers.com ⭐ | ||||||
| A | 162.255.118.51🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES | ||||||
| PTR | eforward1.registrar-servers.com | ||||||
| PTR | eforward3.registrar-servers.com | ||||||
| MX | eforward4.registrar-servers.com(15) | ||||||
| A | 162.255.118.52🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES | ||||||
| PTR | eforward2.registrar-servers.com | ||||||
| MX | eforward5.registrar-servers.com(20) | ||||||
| A | 162.255.118.51🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES | ||||||
| PTR | eforward1.registrar-servers.com | ||||||
| PTR | eforward3.registrar-servers.com | ||||||
| TXT | google-site-verification=RXqnFzlAAS_jyKVGzoIZqF2ocbH3FkhGZRhvi550AU8 | ||||||
| TXT | v=spf1 include:spf.efwd.registrar-servers.com ~all | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.21.7.31, 172.67.135.173 | ||||||
| IPv6 | 2606:4700:3030::6815:71f, 2606:4700:3033::ac43:87ad | ||||||
| SOA | amos.ns.cloudflare.comdns@cloudflare.com serial=2398576843 | ||||||
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=1771291435 | ||||||
Same first word
courscool.com |
DNS History
11 records (11 active, 0 former)
●NSamos.ns.cloudflare.com2026-02-22 → 2026-03-11 · 2 obs
● 2026-03-11 23:29:52
●NSligia.ns.cloudflare.com2026-02-22 → 2026-03-11 · 2 obs
● 2026-03-11 23:29:52
●MXeforward1.registrar-servers.com2026-02-22 → 2026-03-11 · 2 obs
● 2026-03-11 23:29:52
●MXeforward2.registrar-servers.com2026-02-22 → 2026-03-11 · 2 obs
● 2026-03-11 23:29:52
●MXeforward3.registrar-servers.com2026-02-22 → 2026-03-11 · 2 obs
● 2026-03-11 23:29:52
●MXeforward4.registrar-servers.com2026-02-22 → 2026-03-11 · 2 obs
● 2026-03-11 23:29:52
●MXeforward5.registrar-servers.com2026-02-22 → 2026-03-11 · 2 obs
● 2026-03-11 23:29:52
●A104.21.7.312026-02-22 → 2026-03-11 · 2 obs
● 2026-03-11 23:29:52
●A172.67.135.1732026-02-22 → 2026-03-11 · 2 obs
● 2026-03-11 23:29:52
●A2606:4700:3030::6815:71f2026-02-22 → 2026-03-11 · 2 obs
● 2026-03-11 23:29:52
●A2606:4700:3033::ac43:87ad2026-02-22 → 2026-03-11 · 2 obs
● 2026-03-11 23:29:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| courscool.com | ligia.ns.cloudflare.com, amos.ns.cloudflare.com | 12 records |
✅ Authoritative Response
Server: 108.162.195.120
NS records: ligia.ns.cloudflare.com, amos.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for courscool.com (unsigned zone)
⏱️ Timing
Total: 187ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.7.31, 172.67.135.173 |
| AAAA | 2 | 2606:4700:3033::ac43:87ad, 2606:4700:3030::6815:71f |
| NS | 2 | amos.ns.cloudflare.com, ligia.ns.cloudflare.com |
| MX | 5 | eforward1.registrar-servers.com (pri: 10, eforward2.registrar-servers.com (pri: 10... |
| TXT | 2 | google-site-verification=RXqnFzlAAS_jyKV, v=spf1 include:spf.efwd.registrar-server |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | amos.ns.cloudflare.com dns.cloudflare.co |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (ligia.ns.cloudflare.com, ligia.ns.cloudflare.com, ligia.ns.cloudflare.com...)
Analysis
IP Addresses
courscool.com resolves to four IPs: 2606:4700:3030::6815:71f, 2606:4700:3033::ac43:87ad, 104.21.7.31 and 172.67.135.173.
Other host names such as beta-wonderland.senthilprabu.in, ak8888pix.com, m.catholique.org, sdmcorp.org and puntopizza.dk share IP numbers with courscool.com.
Name Servers
courscool.com is delegated to two name servers: amos.ns.cloudflare.com and ligia.ns.cloudflare.com.
courscool.com uses the same name server setup as other domains, including mileo.com.pl, ahmadatra.com, cristianoborgesfotografia.com.br, kspi.or.id and motionroot.com.
At least part of the name servers for courscool.com are shared with other domains, for instance hifimusic.co.il, sleepingtabs.com, freeconverter.org, teupan.de and broadband-finder.co.uk.
These name servers are commonly used alongside the name servers teagan.ns.cloudflare.com.
Host names with six IP numbers:
amos.ns.cloudflare.com points to: 2606:4700:58::a29f:2c78, 2803:f800:50::6ca2:c378, 2a06:98c1:50::ac40:2378, 108.162.195.120, 162.159.44.120 and 172.64.35.120.
ligia.ns.cloudflare.com points to: 2606:4700:50::a29f:2604, 2803:f800:50::6ca2:c204, 2a06:98c1:50::ac40:2204, 108.162.194.4, 162.159.38.4 and 172.64.34.4.
Mail Servers
courscool.com is handled by five mail servers: eforward1.registrar-servers.com, eforward2.registrar-servers.com, eforward3.registrar-servers.com, eforward4.registrar-servers.com and eforward5.registrar-servers.com.
courscool.com shares at least some mail servers with other domains, for example leavdo.com, routeop.com, nylonsin.com, eserynur.club and midfaa.com.
Names with a single IP number:
eforward1.registrar-servers.com points to 162.255.118.51.
eforward2.registrar-servers.com points to 162.255.118.52.
eforward3.registrar-servers.com points to 162.255.118.51.
eforward4.registrar-servers.com points to 162.255.118.52.
eforward5.registrar-servers.com points to 162.255.118.51.
Names pointing to 162.255.118.51: eforward1.registrar-servers.com, eforward3.registrar-servers.com and eforward5.registrar-servers.com.
Names pointing to 162.255.118.52: eforward2.registrar-servers.com and eforward4.registrar-servers.com.