`dev.lessonstudy.de`

DNSSEC	⚠️ Not signed
A	91.195.241.232^{🇩🇪 SEDO91.195.240.0/23 -NET-PI}
NS	`sl1.sedo.com` ⭐ ⚠️ Not in parent delegation
		A	91.195.240.173^{🇩🇪 SEDO91.195.240.0/23 -NET-PI}
NS	`sl2.sedo.com` ⚠️ Not in parent delegation
		A	91.195.241.173^{🇩🇪 SEDO91.195.240.0/23 -NET-PI}
MX	`localhost` ⭐
TXT	`v=spf1 -all`
SOA	`sl1.sedo.com`hostmaster@sedo.de 2018-05-16 #1

`lessonstudy.de`

	DNSSEC	⚠️ Not signed
	A	91.195.241.232^{🇩🇪 SEDO91.195.240.0/23 -NET-PI}
	NS	`sl1.sedo.com` ⭐
	NS	`sl2.sedo.com`
	MX	`localhost` ⭐
	TXT	`v=spf1 -all`
	SOA	`sl1.sedo.com`hostmaster@sedo.de 2018-05-16 #1

Same first word

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Similar names

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edv.hn

evd.org.cn

dev.com.ua

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ved.com.vn

dev.io

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dev.kiev.ua

dev.inc

vde.name

DNS History

4 records (4 active, 0 former)

●NSsl1.sedo.com2026-06-08 → 2026-06-17 · 2 obs

● 2026-06-08 18:09:06
● 2026-06-17 17:15:48

●NSsl2.sedo.com2026-06-08 → 2026-06-17 · 2 obs

● 2026-06-08 18:09:06
● 2026-06-17 17:15:48

●MXlocalhost2026-06-08 → 2026-06-17 · 2 obs

● 2026-06-08 18:09:06
● 2026-06-17 17:15:48

●A91.195.241.2322026-06-08 → 2026-06-17 · 2 obs

● 2026-06-08 18:09:06
● 2026-06-17 17:15:48

🔍 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:91.195.241.173

NS records: sl1.sedo.com, sl2.sedo.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for lessonstudy.de (unsigned zone)

⏱️ Timing

Total: 1027ms | 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

dev.lessonstudy.de points to a single IP number: 91.195.241.232.

Additional host names — walima.de, covh.com, mosaiques.fr and two others — share IP numbers with dev.lessonstudy.de.

Name Servers

dev.lessonstudy.de is delegated to two name servers: sl1.sedo.com and sl2.sedo.com.

dev.lessonstudy.de shares its name server setup with other domains, including voyageindia.com, medicalc.de, vtol.eu and two others.

sl1.sedo.com → 91.195.240.173 and sl2.sedo.com → 91.195.241.173: one IP number per host name.

Mail Servers

dev.lessonstudy.de has one mail server: localhost.

dev.lessonstudy.de shares the same mail server setup as other domains, including projects-abroad.eu, xsb.eu, nb-service.de and two others.

dev.lessonstudy.de - robtex.com