course90.com - robtex.com
course90.com
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
course90.com |
DNS History
8 records (8 active, 0 former)
●NSdns1.registrar-servers.com2026-03-12 → 2026-03-21 · 2 obs
● 2026-03-21 13:20:26
●NSdns2.registrar-servers.com2026-03-12 → 2026-03-21 · 2 obs
● 2026-03-21 13:20:26
●MXalt1.aspmx.l.google.com2026-03-12 → 2026-03-21 · 2 obs
● 2026-03-21 13:20:26
●MXalt2.aspmx.l.google.com2026-03-12 → 2026-03-21 · 2 obs
● 2026-03-21 13:20:26
●MXaspmx.l.google.com2026-03-12 → 2026-03-21 · 2 obs
● 2026-03-21 13:20:26
●MXaspmx2.googlemail.com2026-03-12 → 2026-03-21 · 2 obs
● 2026-03-21 13:20:26
●MXaspmx3.googlemail.com2026-03-12 → 2026-03-21 · 2 obs
● 2026-03-21 13:20:26
●A192.64.119.192026-03-12 → 2026-03-21 · 2 obs
● 2026-03-21 13:20:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| course90.com | dns1.registrar-servers.com, dns2.registrar-servers.com | 4 records |
✅ Authoritative Response
Server: 156.154.132.200
NS records: dns1.registrar-servers.com, dns2.registrar-servers.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for course90.com (unsigned zone)
⏱️ Timing
Total: 189ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 192.64.119.19 |
| NS | 2 | dns1.registrar-servers.com, dns2.registrar-servers.com |
| MX | 5 | aspmx.l.google.com (pri: 1), alt1.aspmx.l.google.com (pri: 5)... |
| SOA | 1 | dns1.registrar-servers.com hostmaster.re |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (dns1.registrar-servers.com, dns1.registrar-servers.com, dns2.registrar-servers.com...)
Analysis
IP Addresses
course90.com resolves to a single IP address: 192.64.119.19.
Other host names including neetss.com, usinggirls.com, teafer.com, theasgproject.com and kincap.co share IP numbers with course90.com.
Name Servers
course90.com's delegation uses two name servers, dns1.registrar-servers.com and dns2.registrar-servers.com.
course90.com shares the same name server setup as other domains, for example pross.co, fcfsz.com, opmw.com, withersinternational.us and grindboss.com.
course90.com at least partially shares name servers with other domains, including letgoforgrowth.com, basikk.com, pinja.me, volnation.me and uplev.com.
these name servers are commonly used together with dns3.registrar-servers.com, dns4.registrar-servers.com and dns5.registrar-servers.com.
Host names with two IPs:
dns1.registrar-servers.com points to: 2610:a1:1024::200 and 156.154.132.200
dns2.registrar-servers.com points to: 2610:a1:1025::200 and 156.154.133.200
Mail Servers
course90.com is handled by five mail servers: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.
The mail servers for course90.com are shared with other domains, for instance nmi.co.uk, getz-data.com, rtqe.net, ligne.co.jp and rdmc.support.
these mail servers are commonly used with alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx4.googlemail.com and aspmx5.googlemail.com.
Host names with two IP numbers:
aspmx2.googlemail.com points to 2607:f8b0:4023:2801::1b and 192.178.128.27.
aspmx3.googlemail.com points to 2607:f8b0:4023:1015::1b and 172.253.135.26.
aspmx.l.google.com points to 2607:f8b0:4004:c19::1b and 172.253.62.27.
alt1.aspmx.l.google.com points to 2607:f8b0:4003:c30::1b and 74.125.27.26.
alt2.aspmx.l.google.com points to 2607:f8b0:4001:c70::1a and 192.178.209.26.