poolschool.de - dns.ninja
poolschool.de
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=1786830288 | ||||||
Subdomains
mail.poolschool.de |
Same first word
Similar names
DNS History
12 records (6 active, 6 former)
●NSdns1.nsdns.info2026-02-25 → 2026-08-15 · 3 obs
● 2026-02-25 18:26:12
● 2026-08-15 21:49:46
●NSdns2.nsdns.info2026-02-25 → 2026-08-15 · 3 obs
● 2026-02-25 18:26:12
● 2026-08-15 21:49:46
●NSdns3.nsdns.info2026-02-25 → 2026-08-15 · 3 obs
● 2026-02-25 18:26:12
● 2026-08-15 21:49:46
●NSns1.domaindiscount24.net2026-02-25 → 2026-08-15 · 3 obs
● 2026-02-25 18:26:12
● 2026-08-15 21:49:46
○NSnsa0.schlundtech.de2015-07-16 → 2017-10-10 · 4 obs
● 2017-10-10 20:19:44
○ 2026-02-25 18:26:12
○ 2026-08-15 21:49:46
○NSnsb0.schlundtech.de2015-07-16 → 2017-10-10 · 4 obs
● 2017-10-10 20:19:44
○ 2026-02-25 18:26:12
○ 2026-08-15 21:49:46
○NSnsc0.schlundtech.de2015-07-16 → 2017-10-10 · 4 obs
● 2017-10-10 20:19:44
○ 2026-02-25 18:26:12
○ 2026-08-15 21:49:46
○NSnsd0.schlundtech.de2015-07-16 → 2017-10-10 · 4 obs
● 2017-10-10 20:19:44
○ 2026-02-25 18:26:12
○ 2026-08-15 21:49:46
●MXalfa3203.alfahosting-server.de2026-02-25 → 2026-08-15 · 3 obs
● 2026-02-25 18:26:12
● 2026-08-15 21:49:46
○MXmail.poolschool.de2015-07-16 → 2017-10-10 · 4 obs
● 2017-10-10 20:19:44
○ 2026-02-25 18:26:12
○ 2026-08-15 21:49:46
●A109.237.138.492026-02-25 → 2026-08-15 · 3 obs
● 2026-02-25 18:26:12
● 2026-08-15 21:49:46
○A89.110.147.792015-07-16 → 2017-10-10 · 4 obs
● 2017-10-10 20:19:44
○ 2026-02-25 18:26:12
○ 2026-08-15 21:49:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | a.nic.de, f.nic.de, z.nic.de | - |
| poolschool.de | dns1.nsdns.info, dns2.nsdns.info, dns3.nsdns.info | - |
✅ Authoritative Response
Server:193.227.117.33
NS records: dns1.nsdns.info, dns2.nsdns.info, dns3.nsdns.info
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for poolschool.de (unsigned zone)
⏱️ Timing
Total: 770ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 109.237.138.49 |
| NS | 3 | dns3.nsdns.info, dns2.nsdns.info... |
| MX | 1 | alfa3203.alfahosting-server.de (pri: 10) |
| TXT | 1 | v=spf1 ip4:109.237.138.49 include:secure |
| SOA | 1 | ns1.domaindiscount24.net tech.key-system |
Analysis
Hierarchy
The domain mail.poolschool.de falls under the parent poolschool.de.
IP Addresses
poolschool.de has exactly one IP address — 109.237.138.49.
mail.reventi.eu, mail.ferien-wohnung-heller.de, mail.vnalp.com plus two other host names have IP numbers in common with poolschool.de.
Name Servers
Four name servers handle the delegation for poolschool.de: dns1.nsdns.info, dns2.nsdns.info, dns3.nsdns.info and ns1.domaindiscount24.net.
At least some of poolschool.de's name servers are shared with other domains, for example lightcinemas.de, fame-forum.com, jjsoft.nl and two more.
These name servers tend to be deployed in combination with the name servers ns2.domaindiscount24.net and ns3.domaindiscount24.net.
Four hostnames, each resolving to a pair of IP addresses: dns1.nsdns.info directs to 193.227.117.33 and 2a04:2b00:14cc::33; dns2.nsdns.info directs to 194.50.187.33 and 2a04:2b00:14dd::33; dns3.nsdns.info directs to 194.0.182.33 and 2a04:2b00:14ee::33; ns1.domaindiscount24.net directs to 193.227.117.34 and 2a04:2b00:14cc::34.
Mail Servers
poolschool.de uses one mail server — alfa3203.alfahosting-server.de.
The mail server setup of poolschool.de matches that of other domains such as binaer.com, o69o.de, autocentersued.de and two others.
At least some of the mail servers used by poolschool.de are shared with other domains: trompete-berlin.de, vassilina.de, loew-landtechnik.de and two others among them.
alfa3203.alfahosting-server.de carries a single IP number, which is 109.237.138.49.