courseo.com - dns.ninja
courseo.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=1782418205 | ||||||
Same first word
Similar names
DNS History
10 records (9 active, 1 former)
●NSns35.domaincontrol.com2015-07-07 → 2026-06-25 · 2 obs
● 2026-06-25 20:10:54
●NSns36.domaincontrol.com2015-07-07 → 2026-06-25 · 2 obs
● 2026-06-25 20:10:54
●MXalt1.aspmx.l.google.com2015-07-07 → 2026-06-25 · 2 obs
● 2026-06-25 20:10:54
●MXalt2.aspmx.l.google.com2015-07-07 → 2026-06-25 · 2 obs
● 2026-06-25 20:10:54
●MXaspmx.l.google.com2015-07-07 → 2026-06-25 · 2 obs
● 2026-06-25 20:10:54
●MXaspmx2.googlemail.com2015-07-07 → 2026-06-25 · 2 obs
● 2026-06-25 20:10:54
●MXaspmx3.googlemail.com2015-07-07 → 2026-06-25 · 2 obs
● 2026-06-25 20:10:54
●A15.197.148.332026-04-04 → 2026-06-25 · 3 obs
● 2026-04-04 10:39:42
● 2026-06-25 20:10:54
○A184.168.221.472015-07-07 → 2017-05-24 · 4 obs
● 2017-05-24 08:59:50
○ 2026-04-04 10:39:42
○ 2026-06-25 20:10:54
●A3.33.130.1902026-04-04 → 2026-06-25 · 3 obs
● 2026-04-04 10:39:42
● 2026-06-25 20:10:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| courseo.com | ns35.domaincontrol.com, ns36.domaincontrol.com | 4 records |
✅ Authoritative Response
Server:173.201.75.18
NS records: ns35.domaincontrol.com, ns36.domaincontrol.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for courseo.com (unsigned zone)
⏱️ Timing
Total: 859ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 3.33.130.190, 15.197.148.33 |
| NS | 2 | ns35.domaincontrol.com, ns36.domaincontrol.com |
| MX | 5 | alt1.aspmx.l.google.com (pri: 20), alt2.aspmx.l.google.com (pri: 30)... |
| TXT | 1 | google-site-verification=hCC9hVi8EW4CfdR |
| SOA | 1 | NS35.DOMAINCONTROL.com dns.jomax.net |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns35.domaincontrol.com, ns35.domaincontrol.com, ns36.domaincontrol.com...)
Analysis
IP Addresses
courseo.com directs to two IP numbers, 3.33.130.190 and 15.197.148.33
307333.com, cpbpay.com, zedkay.co and two other host names share IP numbers with courseo.com.
Name Servers
courseo.com has two authoritative name servers — ns35.domaincontrol.com and ns36.domaincontrol.com.
courseo.com uses the same name servers as several other domains — among them egtank.com, hard-beam.com, swagjack.com and two more.
Both ns35.domaincontrol.com and ns36.domaincontrol.com have two IP addresses each. ns35.domaincontrol.com resolves to 97.74.107.18 and 2603:5:21b1::12; ns36.domaincontrol.com resolves to 173.201.75.18 and 2603:5:22b1::12.
Mail Servers
Mail for courseo.com is handled by five mail servers, namely aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.
courseo.com has at least partial mail server overlap with other domains such as ns500698.ns500758.ns500698.ns500759.ns500759.ns500698.ns500736.ns500736.ns500698.ns500735.ns500698.ns500698.ns500686.ns500619.trackreceptor.com, ns500699.ns500699.ns500693.ns500699.ns500699.ns500734.ns500699.ns500588.ns500588.ns500683.ns500699.ns500699.ns500683.ns500693.ns500612.ns500110.dtrkdll.com, ns500754.ns500754.ns500742.ns500754.ns500671.ns500671.ns500731.ns500731.ns500678.ns500671.ns500704.ns500705.ns500678.ns500649.ns500649.ns500666.ns500142.lusty(0x736c7574)z.com and two more.
These mail servers commonly co-occur with mail servers alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 others.
Hostnames that resolve to two IP addresses:
aspmx2.googlemail.com resolves to 108.177.123.27 and 2800:3f0:4003:c0f::1b.
aspmx3.googlemail.com resolves to 172.253.116.27 and 2a00:1450:400b:c02::1b.
aspmx.l.google.com resolves to 172.253.122.26 and 2607:f8b0:4004:c21::1b.
alt1.aspmx.l.google.com resolves to 108.177.123.26 and 2800:3f0:4003:c0f::1b.
alt2.aspmx.l.google.com resolves to 172.253.116.26 and 2a00:1450:400b:c02::1a.
The host names aspmx2.googlemail.com and alt1.aspmx.l.google.com both resolve to 2800:3f0:4003:c0f::1b IP addresses.