coursetutorials.com - robtex.com
coursetutorials.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=1787997350 | ||||||
Same first word
coursetutorials.com |
Similar names
Previous names
Next names
DNS History
13 records (11 active, 2 former)
●NSns1.dreamhost.com2015-08-10 → 2026-08-29 · 2 obs
● 2026-08-29 09:59:02
●NSns2.dreamhost.com2015-08-10 → 2026-08-29 · 2 obs
● 2026-08-29 09:59:02
●NSns3.dreamhost.com2015-08-10 → 2026-08-29 · 2 obs
● 2026-08-29 09:59:02
●MXalt1.aspmx.l.google.com2015-08-10 → 2026-08-29 · 2 obs
● 2026-08-29 09:59:02
●MXalt2.aspmx.l.google.com2015-08-10 → 2026-08-29 · 2 obs
● 2026-08-29 09:59:02
●MXaspmx.l.google.com2015-08-10 → 2026-08-29 · 2 obs
● 2026-08-29 09:59:02
●MXaspmx2.googlemail.com2015-08-10 → 2026-08-29 · 2 obs
● 2026-08-29 09:59:02
●MXaspmx3.googlemail.com2015-08-10 → 2026-08-29 · 2 obs
● 2026-08-29 09:59:02
●MXaspmx4.googlemail.com2015-08-10 → 2026-08-29 · 2 obs
● 2026-08-29 09:59:02
●MXaspmx5.googlemail.com2015-08-10 → 2026-08-29 · 2 obs
● 2026-08-29 09:59:02
○A173.236.164.522016-07-15 → 2017-04-01 · 5 obs
● 2016-07-15 02:24:04
● 2017-04-01 18:42:24
○ 2026-08-22 23:19:16
○ 2026-08-29 09:59:02
○A173.236.186.2212015-08-10 → 2016-03-16 · 4 obs
● 2016-03-16 12:06:58
○ 2016-07-15 02:24:04
○ 2026-08-29 09:59:02
●A173.236.241.1302026-08-22 → 2026-08-29 · 3 obs
● 2026-08-22 23:19:16
● 2026-08-29 09:59:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | d.gtld-servers.net, f.gtld-servers.net, c.gtld-servers.net, h.gtld-servers.net... | - |
| coursetutorials.com | ns1.dreamhost.com, ns2.dreamhost.com, ns3.dreamhost.com | 3 records |
✅ Authoritative Response
Server:162.159.26.14
NS records: ns1.dreamhost.com, ns2.dreamhost.com, ns3.dreamhost.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coursetutorials.com (unsigned zone)
⏱️ Timing
Total: 307ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 173.236.241.130 |
| NS | 3 | ns2.dreamhost.com, ns3.dreamhost.com... |
| MX | 7 | ASPMX2.GOOGLEMAIL.com (pri: 30), ASPMX.L.GOOGLE.com (pri: 10)... |
| SOA | 1 | ns1.dreamhost.com hostmaster.dreamhost.c |
📌 Glue Records Collected
Total: 3
Out-of-bailiwick: 3 (ns1.dreamhost.com, ns2.dreamhost.com, ns3.dreamhost.com)
Analysis
IP Addresses
coursetutorials.com has exactly one IP address — 173.236.241.130.
www.mvstat.net, robles.edu.gt, mvstat.net plus two other host names have IP numbers in common with coursetutorials.com.
Name Servers
coursetutorials.com has three name servers — ns1.dreamhost.com, ns2.dreamhost.com and ns3.dreamhost.com.
coursetutorials.com has at least partial name server overlap with other domains, such as grahamhuber.com, muzbox.com, jacksondunstan.com and two others.
Each of the three hostnames points to exactly one IP address: ns1.dreamhost.com points to 162.159.26.14, ns2.dreamhost.com points to 162.159.26.81 and ns3.dreamhost.com points to 162.159.27.84.
Mail Servers
Mail for coursetutorials.com is routed through 7 mail servers, including aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and 4 other.
At least some of the mail servers used by coursetutorials.com are shared with other domains: sachabenda.com, platensehogar.com.ar, plushubglobal.com and two others among them.
These mail servers are often deployed together with aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and 3 other mail servers.
Host names pointing to two IP addresses:
aspmx2.googlemail.com resolves to 192.178.234.26 and 2800:3f0:4003:c14::1a.
aspmx3.googlemail.com resolves to 172.253.116.27 and 2a00:1450:400b:c02::1a.
aspmx4.googlemail.com resolves to 192.178.223.27 and 2a00:1450:4009:c0f::1a.
aspmx5.googlemail.com resolves to 172.253.157.27 and 2a00:1450:400c:c23::1b.
aspmx.l.google.com resolves to 142.251.163.27 and 2607:f8b0:4004:c21::1a.
alt1.aspmx.l.google.com resolves to 192.178.234.27 and 2800:3f0:4003:c14::1b.
alt2.aspmx.l.google.com resolves to 172.253.116.27 and 2a00:1450:400b:c02::1a.
The host names aspmx3.googlemail.com and alt2.aspmx.l.google.com both resolve to 2a00:1450:400b:c02::1a IP addresses.
The host names aspmx3.googlemail.com and alt2.aspmx.l.google.com both resolve to 172.253.116.27 IP addresses.