courses - dns.ninja
courses
(root)
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.root-servers.net ⭐ ⚠️ Not in parent delegation | ||||||
| NS | b.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | c.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | d.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | e.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | f.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | g.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | h.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | i.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | j.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | k.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | l.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | m.root-servers.net ⚠️ Not in parent delegation | ||||||
| SOA | a.root-servers.netnstld@verisign-grs.com 2026-06-03 #2 | ||||||
Subdomains
Same first word
Similar names
DNS History
7 records (6 active, 1 former)
●NSa.nic.courses2015-08-21 → 2026-06-04 · 2 obs
● 2026-06-04 01:41:08
●NSb.nic.courses2015-08-21 → 2026-06-04 · 2 obs
● 2026-06-04 01:41:08
●NSc.nic.courses2015-08-21 → 2026-06-04 · 2 obs
● 2026-06-04 01:41:08
○NSd.nic.courses2015-08-21 → 2017-06-04 · 4 obs
● 2017-06-04 20:57:56
○ 2026-02-14 18:29:46
○ 2026-06-04 01:41:08
●NSx.nic.courses2026-02-14 → 2026-06-04 · 3 obs
● 2026-02-14 18:29:46
● 2026-06-04 01:41:08
●NSy.nic.courses2026-02-14 → 2026-06-04 · 3 obs
● 2026-02-14 18:29:46
● 2026-06-04 01:41:08
●NSz.nic.courses2026-02-14 → 2026-06-04 · 3 obs
● 2026-02-14 18:29:46
● 2026-06-04 01:41:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| courses | b.nic.courses, c.nic.courses, z.nic.courses, y.nic.courses... | 12 records |
✅ Authoritative Response
Server:37.209.192.9
NS records: b.nic.courses, c.nic.courses, z.nic.courses, y.nic.courses, a.nic.courses, x.nic.courses
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 698ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 6 | a.nic.courses, b.nic.courses... |
| SOA | 1 | a.nic.courses admin.tldns.godaddy |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (z.nic.courses, y.nic.courses, x.nic.courses...)
Analysis
Hierarchy
Under courses as parent: pbtkhdu.courses, instagram.courses, unamensagens.courses, auricpp.courses, yetells-essim.courses and several hundred other host names.
Name Servers
courses is served by 6 authoritative name servers: a.nic.courses, b.nic.courses, c.nic.courses and three additional ones.
At least some of courses's name servers are also used by other domains, among them nic.courses.
These name servers regularly co-occur with the name servers x.nic.courses, y.nic.courses and z.nic.courses.
Hosts with two IP numbers each:
a.nic.courses directs traffic to 37.209.192.9 and 2001:dcd:1::9.
b.nic.courses directs traffic to 37.209.194.9 and 2001:dcd:2::9.
c.nic.courses directs traffic to 37.209.196.9 and 2001:dcd:3::9.
x.nic.courses directs traffic to 156.154.172.82 and 2610:a1:1074::1:82.
y.nic.courses directs traffic to 156.154.173.82 and 2610:a1:1075::1:82.
z.nic.courses directs traffic to 156.154.174.82 and 2610:a1:1076::1:82.