coursecorner.de - robtex.com
coursecorner.de
| DNSSEC | ⚠️ Not signed | ||||||
| A | 3.33.251.168🇺🇸 Amazon3.33.240.0/20 | ||||||
| A | 15.197.225.128🇺🇸 Amazon15.197.224.0/20 | ||||||
| NS | ns25.domaincontrol.com ⭐ | ||||||
| NS | ns26.domaincontrol.com | ||||||
| MX | server.analysiscorner.com ⭐ | ||||||
| SOA | ns25.domaincontrol.comdns@jomax.net 2026-01-11 #1 | ||||||
de
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | f.nic.de ⭐ | ||||||
| NS | a.nic.de | ||||||
| NS | l.de.net ⚠️ Not in parent delegation | ||||||
| NS | n.de.net ⚠️ Not in parent delegation | ||||||
| NS | s.de.net ⚠️ Not in parent delegation | ||||||
| NS | z.nic.de | ||||||
| SOA | f.nic.dedns-operations@denic.de serial=1778829855 | ||||||
Subdomains
mail.coursecorner.de |
Same first word
coursecorner.de |
DNS History
11 records (5 active, 6 former)
○NSns.123-reg.co.uk2017-02-06 → 2018-07-05 · 4 obs
● 2017-02-06 02:43:08
● 2018-07-05 05:42:34
○ 2026-03-29 10:08:34
○ 2026-05-15 07:38:22
● 2018-07-05 05:42:34
○ 2026-03-29 10:08:34
○ 2026-05-15 07:38:22
○NSns2.123-reg.co.uk2017-02-06 → 2018-07-05 · 4 obs
● 2017-02-06 02:43:08
● 2018-07-05 05:42:34
○ 2026-03-29 10:08:34
○ 2026-05-15 07:38:22
● 2018-07-05 05:42:34
○ 2026-03-29 10:08:34
○ 2026-05-15 07:38:22
●NSns25.domaincontrol.com2026-03-29 → 2026-05-15 · 3 obs
○ 2018-07-05 05:42:34
● 2026-03-29 10:08:34
● 2026-05-15 07:38:22
● 2026-03-29 10:08:34
● 2026-05-15 07:38:22
●NSns26.domaincontrol.com2026-03-29 → 2026-05-15 · 3 obs
○ 2018-07-05 05:42:34
● 2026-03-29 10:08:34
● 2026-05-15 07:38:22
● 2026-03-29 10:08:34
● 2026-05-15 07:38:22
●MXserver.analysiscorner.com2017-02-06 → 2026-05-15 · 2 obs
● 2017-02-06 02:43:08
● 2026-05-15 07:38:22
● 2026-05-15 07:38:22
○A109.68.33.642015-11-21 → 2016-06-25 · 4 obs
● 2015-11-21 14:45:44
● 2016-06-25 23:12:44
○ 2017-02-06 02:43:08
○ 2026-05-15 07:38:22
● 2016-06-25 23:12:44
○ 2017-02-06 02:43:08
○ 2026-05-15 07:38:22
●A15.197.225.1282026-03-29 → 2026-05-15 · 3 obs
○ 2018-07-05 05:42:34
● 2026-03-29 10:08:34
● 2026-05-15 07:38:22
● 2026-03-29 10:08:34
● 2026-05-15 07:38:22
●A3.33.251.1682026-03-29 → 2026-05-15 · 3 obs
○ 2018-07-05 05:42:34
● 2026-03-29 10:08:34
● 2026-05-15 07:38:22
● 2026-03-29 10:08:34
● 2026-05-15 07:38:22
○A62.75.138.1612018-07-05 → 2018-07-05 · 4 obs
○ 2017-02-06 02:43:08
● 2018-07-05 05:42:34
○ 2026-03-29 10:08:34
○ 2026-05-15 07:38:22
● 2018-07-05 05:42:34
○ 2026-03-29 10:08:34
○ 2026-05-15 07:38:22
○A80.86.84.92017-02-06 → 2017-02-06 · 4 obs
○ 2016-06-25 23:12:44
● 2017-02-06 02:43:08
○ 2018-07-05 05:42:34
○ 2026-05-15 07:38:22
● 2017-02-06 02:43:08
○ 2018-07-05 05:42:34
○ 2026-05-15 07:38:22
○A81.169.244.12026-03-29 → 2026-05-15 · 2 obs
○ 2026-03-29 10:08:34
○ 2026-05-15 07:38:22
○ 2026-05-15 07:38:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | f.nic.de, a.nic.de, z.nic.de | - |
| coursecorner.de | ns26.domaincontrol.com, ns25.domaincontrol.com | - |
✅ Authoritative Response
Server:97.74.102.13
NS records: ns26.domaincontrol.com, ns25.domaincontrol.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coursecorner.de (unsigned zone)
⏱️ Timing
Total: 2396ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 15.197.225.128, 3.33.251.168 |
| NS | 2 | ns25.domaincontrol.com, ns26.domaincontrol.com |
| MX | 1 | server.analysiscorner.com (pri: 10) |
| SOA | 1 | ns25.domaincontrol.com dns.jomax.net |
Analysis
Hierarchy
coursecorner.de is a parent of mail.coursecorner.de.
IP Addresses
coursecorner.de points to two IP numbers: 3.33.251.168 and 15.197.225.128.
Name Servers
coursecorner.de is delegated to two name servers: ns25.domaincontrol.com and ns26.domaincontrol.com.
Mail Servers
The mail server for coursecorner.de is server.analysiscorner.com.