lessonstudy.de - robtex.com
lessonstudy.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=1781707970 | ||||||
Subdomains
dev.lessonstudy.de |
Same first word
Similar names
DNS History
4 records (4 active, 0 former)
●MXlocalhost2026-06-17 → 2026-06-17 · 2 obs
● 2026-06-17 15:11:32
●A91.195.241.2322026-06-17 → 2026-06-17 · 2 obs
● 2026-06-17 15:11:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | a.nic.de, f.nic.de, z.nic.de | - |
| lessonstudy.de | sl1.sedo.com, sl2.sedo.com | - |
✅ Authoritative Response
Server:91.195.240.173
NS records: sl1.sedo.com, sl2.sedo.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for lessonstudy.de (unsigned zone)
⏱️ Timing
Total: 3859ms | 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
Hierarchy
dev.lessonstudy.de is a subdomain of lessonstudy.de.
IP Addresses
lessonstudy.de resolves to just one IP address, 91.195.241.232.
Two other host names, along with solfa.eu, leelo.de and faicom.de, also share IP numbers with lessonstudy.de.
Name Servers
Two name servers handle the delegation for lessonstudy.de: sl1.sedo.com and sl2.sedo.com.
lessonstudy.de shares its NS records with other domains, for example tamborino.de, 138-static.reverse.my-city.eu, elkopower.de and two others.
Both sl1.sedo.com and sl2.sedo.com have a single IP address each — sl1.sedo.com resolves to 91.195.240.173 while sl2.sedo.com resolves to 91.195.241.173.
Mail Servers
The sole mail server for lessonstudy.de is localhost.
Among the domains sharing a mail server setup with lessonstudy.de are bvop.com, ktxo.com, funwin.de and two others.