sys-admin.de - dns.ninja
sys-admin.de
| DNSSEC | ⚠️ Not signed | ||||||
| A | 87.237.121.138🇩🇪 NETBUILD-AS87.237.120.0/21 Net-Build GmbH Alfred-Nobel-Allee 38 66793 Saarwellingen Germany | ||||||
| PTR | web05.net-server.de | ||||||
| NS | ns1.net-build.net ⭐ | ||||||
| A | 87.237.124.6🇩🇪 NETBUILD-AS87.237.120.0/21 Net-Build GmbH Alfred-Nobel-Allee 38 66793 Saarwellingen Germany | ||||||
| PTR | ns1.netbuild.net | ||||||
| NS | ns1.net-server.de | ||||||
| A | 2a02:420:0:3::3🇩🇪 NETBUILD-AS2a02:420::/29 Net-Build GmbH Alfred-Nobel-Allee 38 66793 Saarwellingen Germany | ||||||
| PTR | dns01-ipv6.nbgo.de | ||||||
| A | 87.237.124.6🇩🇪 NETBUILD-AS87.237.120.0/21 Net-Build GmbH Alfred-Nobel-Allee 38 66793 Saarwellingen Germany | ||||||
| PTR | ns1.netbuild.net | ||||||
| NS | ns2.net-server.de | ||||||
| A | 2a02:420:0:5::3🇩🇪 NETBUILD-AS2a02:420::/29 Net-Build GmbH Alfred-Nobel-Allee 38 66793 Saarwellingen Germany | ||||||
| PTR | dns02-ipv6.nbgo.de | ||||||
| A | 87.237.127.6🇩🇪 NETBUILD-AS87.237.120.0/21 Net-Build GmbH Alfred-Nobel-Allee 38 66793 Saarwellingen Germany | ||||||
| PTR | ns2.netbuild.net | ||||||
| MX | mail.sys-admin.de ⭐ | ||||||
| A | 87.237.121.131🇩🇪 NETBUILD-AS87.237.120.0/21 Net-Build GmbH Alfred-Nobel-Allee 38 66793 Saarwellingen Germany | ||||||
| PTR | mail01.net-server.de | ||||||
| SOA | ns1.net-build.netinfo@administrator24.de 2010-02-02 #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=1784245470 | ||||||
Subdomains
mail.sys-admin.de |
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●NSns1.net-build.net2015-08-08 → 2026-07-17 · 2 obs
● 2026-07-17 00:00:16
●NSns1.net-server.de2015-08-08 → 2026-07-17 · 2 obs
● 2026-07-17 00:00:16
●NSns2.net-server.de2015-08-08 → 2026-07-17 · 2 obs
● 2026-07-17 00:00:16
●MXmail.sys-admin.de2015-08-08 → 2026-07-17 · 2 obs
● 2026-07-17 00:00:16
●A87.237.121.1382015-08-08 → 2026-07-17 · 2 obs
● 2026-07-17 00:00:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | f.nic.de, a.nic.de, z.nic.de | - |
| sys-admin.de | ns1.net-server.de, ns2.net-server.de | 2 records |
✅ Authoritative Response
Server:87.237.127.6
NS records: ns1.net-server.de, ns2.net-server.de
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sys-admin.de (unsigned zone)
⏱️ Timing
Total: 519ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 87.237.121.138 |
| NS | 2 | ns1.net-server.de, ns2.net-server.de |
| MX | 1 | mail.sys-admin.de (pri: 0) |
| SOA | 1 | ns1.net-build.net info.administrator24.d |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.net-server.de, ns2.net-server.de)
Analysis
Hierarchy
sys-admin.de is the parent zone for mail.sys-admin.de.
IP Addresses
sys-admin.de resolves to one IP address: 87.237.121.138.
www.briefmarkenfreunde-regen.de, fewo-amkleinenmeer.de, stb-jendrysik.de and two other host names share IP numbers with sys-admin.de.
Name Servers
Three name servers are authoritative for sys-admin.de: ns1.net-server.de, ns2.net-server.de and ns1.net-build.net.
sys-admin.de partially shares its NS delegation with several other domains, including akku-kehrer.de, virtualhosts.netbuild.net, poges.de and two others.
In DNS configurations, these name servers often share authority with ns2.net-build.net, ns3.net-build.net, ns1.netbuild.net and 7 other name servers.
Hostnames that resolve to two IP addresses:
ns1.net-server.de maps to two IP addresses — 87.237.124.6 and 2a02:420:0:3::3.
ns2.net-server.de maps to two IP addresses — 87.237.127.6 and 2a02:420:0:5::3.
Hosts with just one IP address:
ns1.net-build.net points to the IP address 87.237.124.6.
These two host names — ns1.net-server.de and ns1.net-build.net — each point to 87.237.124.6 IP addresses.
Mail Servers
Mail for sys-admin.de is handled by a single mail server, mail.sys-admin.de.
There is one IP number for mail.sys-admin.de: 87.237.121.131.