polytechnique.de - dns.ninja
polytechnique.de
| DNSSEC | ⚠️ Not signed | ||||||
| A | 91.195.241.232🇩🇪 SEDO91.195.240.0/23 -NET-PI | ||||||
| NS | sl1.sedo.com ⭐ | ||||||
| A | 91.195.240.173🇩🇪 SEDO91.195.240.0/23 -NET-PI | ||||||
| NS | sl2.sedo.com | ||||||
| A | 91.195.241.173🇩🇪 SEDO91.195.240.0/23 -NET-PI | ||||||
| MX | localhost ⭐ | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | sl1.sedo.comhostmaster@sedo.de 2018-05-16 #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=1784779764 | ||||||
Same first word
DNS History
11 records (4 active, 7 former)
○NSns1.parkingcrew.net2015-07-14 → 2020-01-30 · 4 obs
● 2020-01-30 21:56:04
○ 2026-04-08 09:05:20
○ 2026-07-23 04:16:42
○NSns2.parkingcrew.net2015-07-14 → 2020-01-30 · 4 obs
● 2020-01-30 21:56:04
○ 2026-04-08 09:05:20
○ 2026-07-23 04:16:42
●NSsl1.sedo.com2026-04-08 → 2026-07-23 · 3 obs
● 2026-04-08 09:05:20
● 2026-07-23 04:16:42
●NSsl2.sedo.com2026-04-08 → 2026-07-23 · 3 obs
● 2026-04-08 09:05:20
● 2026-07-23 04:16:42
●MXlocalhost2026-04-08 → 2026-07-23 · 3 obs
● 2026-04-08 09:05:20
● 2026-07-23 04:16:42
○MXmail.h-email.net2015-11-17 → 2015-11-17 · 3 obs
○ 2016-02-08 13:52:38
○ 2026-07-23 04:16:42
○A185.53.177.92015-07-14 → 2016-07-02 · 6 obs
● 2015-11-17 05:36:44
○ 2016-02-08 13:52:38
● 2016-07-02 02:23:04
○ 2017-03-16 12:02:42
○ 2026-07-23 04:16:42
○A185.53.178.72016-02-08 → 2016-02-08 · 4 obs
● 2016-02-08 13:52:38
○ 2016-07-02 02:23:04
○ 2026-07-23 04:16:42
○A185.53.178.82020-01-30 → 2020-01-30 · 4 obs
● 2020-01-30 21:56:04
○ 2026-04-08 09:05:20
○ 2026-07-23 04:16:42
○A185.53.179.82017-03-16 → 2017-03-16 · 4 obs
● 2017-03-16 12:02:42
○ 2020-01-30 21:56:04
○ 2026-07-23 04:16:42
●A91.195.241.2322026-04-08 → 2026-07-23 · 3 obs
● 2026-04-08 09:05:20
● 2026-07-23 04:16:42
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | z.nic.de, a.nic.de, f.nic.de | - |
| polytechnique.de | sl2.sedo.com, sl1.sedo.com | - |
✅ Authoritative Response
Server:91.195.240.173
NS records: sl2.sedo.com, sl1.sedo.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for polytechnique.de (unsigned zone)
⏱️ Timing
Total: 4299ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 91.195.241.232 |
| NS | 2 | sl1.sedo.com, sl2.sedo.com |
| MX | 1 | localhost (pri: 0) |
| TXT | 1 | v=spf1 -all |
| SOA | 1 | sl1.sedo.com hostmaster.sedo.de |
Analysis
IP Addresses
polytechnique.de resolves to just one IP address, 91.195.241.232.
Two other host names, along with st-design.eu, dreamtalk.de and ecomicro.com, also share IP numbers with polytechnique.de.
Name Servers
polytechnique.de uses two name servers for its delegation: sl1.sedo.com and sl2.sedo.com.
polytechnique.de shares its NS records with other domains, for example lhgroup.net, simply-web.de, mx.alerts.amsterdam and two others.
At least some of polytechnique.de's name servers are also used by other domains, among them strassenmaedchen.de.
These name servers are routinely deployed together with the name servers ns1.sedoparking.com.
sl1.sedo.com → 91.195.240.173 and sl2.sedo.com → 91.195.241.173: one IP number per host name.
Mail Servers
The sole mail server for polytechnique.de is localhost.
Among the domains sharing a mail server setup with polytechnique.de are makesomething.co.uk, coho.de, pozuelodealarcon.net and two others.