classmate.de - dns.ninja
classmate.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=1781431512 | ||||||
Subdomains
mail.classmate.de |
Same first word
Similar names
DNS History
15 records (4 active, 11 former)
○NSns1.netzhoster.de2015-06-04 → 2015-06-04 · 3 obs
○ 2015-10-20 06:01:46
○ 2026-06-14 10:17:10
○NSns1.sedoparking.com2015-10-20 → 2017-05-30 · 5 obs
● 2015-10-20 06:01:46
● 2017-05-30 18:51:10
○ 2026-03-17 09:03:48
○ 2026-06-14 10:17:10
○NSns2.netzhoster.de2015-06-04 → 2015-06-04 · 3 obs
○ 2015-10-20 06:01:46
○ 2026-06-14 10:17:10
○NSns2.sedoparking.com2015-10-20 → 2017-05-30 · 5 obs
● 2015-10-20 06:01:46
● 2017-05-30 18:51:10
○ 2026-03-17 09:03:48
○ 2026-06-14 10:17:10
○NSns3.netzhoster.de2015-06-04 → 2015-06-04 · 3 obs
○ 2015-10-20 06:01:46
○ 2026-06-14 10:17:10
●NSsl1.sedo.com2026-03-17 → 2026-06-14 · 3 obs
● 2026-03-17 09:03:48
● 2026-06-14 10:17:10
●NSsl2.sedo.com2026-03-17 → 2026-06-14 · 3 obs
● 2026-03-17 09:03:48
● 2026-06-14 10:17:10
●MXlocalhost2017-05-30 → 2026-06-14 · 3 obs
● 2017-05-30 18:51:10
● 2026-06-14 10:17:10
○MXmail.nickstel.com2015-10-20 → 2016-07-26 · 5 obs
● 2015-10-20 06:01:46
● 2016-07-26 13:48:42
○ 2017-05-30 18:51:10
○ 2026-06-14 10:17:10
○MXmx01.wk-serv.net2015-06-04 → 2015-06-04 · 3 obs
○ 2015-10-20 06:01:46
○ 2026-06-14 10:17:10
○MXmx02.wk-serv.net2015-06-04 → 2015-06-04 · 3 obs
○ 2015-10-20 06:01:46
○ 2026-06-14 10:17:10
○A72.52.4.1222017-05-30 → 2017-05-30 · 4 obs
● 2017-05-30 18:51:10
○ 2026-03-17 09:03:48
○ 2026-06-14 10:17:10
○A72.52.4.912015-10-20 → 2016-07-26 · 5 obs
● 2015-10-20 06:01:46
● 2016-07-26 13:48:42
○ 2017-05-30 18:51:10
○ 2026-06-14 10:17:10
○A83.149.68.242015-06-04 → 2015-06-04 · 3 obs
○ 2015-10-20 06:01:46
○ 2026-06-14 10:17:10
●A91.195.241.2322026-03-17 → 2026-06-14 · 3 obs
● 2026-03-17 09:03:48
● 2026-06-14 10:17:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | z.nic.de, f.nic.de, a.nic.de | - |
| classmate.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 classmate.de (unsigned zone)
⏱️ Timing
Total: 3934ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 91.195.241.232 |
| NS | 2 | sl2.sedo.com, sl1.sedo.com |
| MX | 1 | localhost (pri: 0) |
| TXT | 1 | v=spf1 -all |
| SOA | 1 | sl1.sedo.com hostmaster.sedo.de |
Analysis
Hierarchy
The domain mail.classmate.de falls under the parent classmate.de.
IP Addresses
classmate.de has exactly one IP address — 91.195.241.232.
conciergeprive.ch, www.synesthesia.online, otherland.eu plus two other host names have IP numbers in common with classmate.de.
Name Servers
classmate.de has two authoritative name servers — sl1.sedo.com and sl2.sedo.com.
The name server configuration of classmate.de is shared with other domains, for instance goodtime.de, addtime.de, wellness-zahnarzt.de and two others.
The name servers for classmate.de overlap at least partially with those of other domains — for example mail.my-bike.eu.
Each of sl1.sedo.com and sl2.sedo.com has one IP address: sl1.sedo.com uses 91.195.240.173 and sl2.sedo.com uses 91.195.241.173.
Mail Servers
classmate.de uses one mail server — localhost.
The mail server setup of classmate.de matches that of other domains such as www.rct.info, trifinder.com, us-f.com and two others.