sem-online.de - robtex.com
sem-online.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=1785739873 | ||||||
Subdomains
mail.sem-online.de |
Same first word
sem-online.de |
sem-online.com |
sem-online.net |
sem-online.ru |
Similar names
DNS History
14 records (7 active, 7 former)
●NSns1.dogado.de2026-03-04 → 2026-08-03 · 3 obs
● 2026-03-04 15:34:36
● 2026-08-03 07:31:36
○NSns1.mono.net2015-07-11 → 2017-12-25 · 4 obs
● 2017-12-25 16:27:46
○ 2026-03-04 15:34:36
○ 2026-08-03 07:31:36
●NSns2.dogado.de2026-03-04 → 2026-08-03 · 3 obs
● 2026-03-04 15:34:36
● 2026-08-03 07:31:36
○NSns2.mono.net2015-07-11 → 2017-12-25 · 4 obs
● 2017-12-25 16:27:46
○ 2026-03-04 15:34:36
○ 2026-08-03 07:31:36
●NSns3.dogado.de2026-03-04 → 2026-08-03 · 3 obs
● 2026-03-04 15:34:36
● 2026-08-03 07:31:36
●NSns4.dogado.de2026-03-04 → 2026-08-03 · 3 obs
● 2026-03-04 15:34:36
● 2026-08-03 07:31:36
●MXmx-01-eu-central-1.prod.hydra.sophos.com2026-03-04 → 2026-08-03 · 3 obs
● 2026-03-04 15:34:36
● 2026-08-03 07:31:36
●MXmx-02-eu-central-1.prod.hydra.sophos.com2026-03-04 → 2026-08-03 · 3 obs
● 2026-03-04 15:34:36
● 2026-08-03 07:31:36
○MXmx.sem-online.de.cust.b.hostedemail.com2015-07-11 → 2017-12-25 · 4 obs
● 2017-12-25 16:27:46
○ 2026-03-04 15:34:36
○ 2026-08-03 07:31:36
●A185.181.133.1912026-03-04 → 2026-08-03 · 3 obs
● 2026-03-04 15:34:36
● 2026-08-03 07:31:36
○A185.58.213.1002016-01-31 → 2016-01-31 · 4 obs
● 2016-01-31 23:22:26
○ 2016-04-18 00:55:42
○ 2026-08-03 07:31:36
○A185.58.214.1002015-11-10 → 2015-11-10 · 4 obs
● 2015-11-10 01:03:26
○ 2016-01-31 23:22:26
○ 2026-08-03 07:31:36
○A185.58.214.1062016-04-18 → 2017-12-25 · 5 obs
● 2016-04-18 00:55:42
● 2017-12-25 16:27:46
○ 2026-03-04 15:34:36
○ 2026-08-03 07:31:36
○A212.71.252.682015-07-11 → 2015-07-11 · 3 obs
○ 2015-11-10 01:03:26
○ 2026-08-03 07:31:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | a.nic.de, f.nic.de, z.nic.de | - |
| sem-online.de | ns2.dogado.de, ns3.dogado.de, ns4.dogado.de, ns1.dogado.de | - |
✅ Authoritative Response
Server:217.146.22.194
NS records: ns2.dogado.de, ns3.dogado.de, ns4.dogado.de, ns1.dogado.de
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sem-online.de (unsigned zone)
⏱️ Timing
Total: 4234ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 185.181.133.191 |
| NS | 4 | ns1.dogado.de, ns4.dogado.de... |
| MX | 2 | mx-02-eu-central-1.prod.hydra.sophos.com, mx-01-eu-central-1.prod.hydra.sophos.com |
| TXT | 3 | v=spf1 a mx include:_spf_eucentral1.prod, MS=ms74625411... |
| SOA | 1 | ns1.dogado.de hostmaster.domainbestellsy |
Analysis
Hierarchy
mail.sem-online.de is a subdomain of sem-online.de.
IP Addresses
sem-online.de resolves to one IP address: 185.181.133.191.
waldner.cn, waldner.de, dosomat.de and two other host names share IP numbers with sem-online.de.
Name Servers
The authoritative name servers for sem-online.de are ns1.dogado.de, ns2.dogado.de, ns3.dogado.de and ns4.dogado.de.
The name servers of sem-online.de overlap at least partially with those of other domains — among them npt-technology.com, tasteofarran.de, carprogramm.com and two more.
These name servers commonly appear in delegations together with ns1.betapower.net, ns2.betapower.net, ns3.betapower.net and 5 other.
Each of the four hosts ns1.dogado.de, ns2.dogado.de, ns3.dogado.de and ns4.dogado.de points to a single IP address — ns1.dogado.de points to 95.130.16.246, ns2.dogado.de points to 95.130.17.218, ns3.dogado.de points to 217.146.22.194 and ns4.dogado.de points to 144.76.91.137.
Mail Servers
Mail for sem-online.de is handled by two mail servers — mx-01-eu-central-1.prod.hydra.sophos.com and mx-02-eu-central-1.prod.hydra.sophos.com.
sem-online.de uses an identical mail server configuration to several other domains — among them gueterboden.de, vallizabban.it, buesum.de and two more.
sem-online.de has at least partial mail server overlap with other domains such as ciseg.eu, carlroth.com, neumann-bauelemente.de and two more.
mx-01-eu-central-1.prod.hydra.sophos.com and mx-02-eu-central-1.prod.hydra.sophos.com each resolve to two IP addresses: 3.64.64.1 and 52.57.141.56.
mx-01-eu-central-1.prod.hydra.sophos.com and mx-02-eu-central-1.prod.hydra.sophos.com are host names that each point to 3.64.64.1 IP addresses.
mx-01-eu-central-1.prod.hydra.sophos.com and mx-02-eu-central-1.prod.hydra.sophos.com are host names that each point to 52.57.141.56 IP addresses.