lehrerapp.de - robtex.com
lehrerapp.de
| DNSSEC | ⚠️ Not signed | ||||||
| A | 78.46.134.45🇩🇪 Hetzner78.46.0.0/15 HETZNER-RZ-NBG-BLK5 | ||||||
| PTR | www.lehrerapp.de | ||||||
| NS | ns1.your-server.de ⭐ | ||||||
| A | 2a01:4f8:0:1::5ddc:1🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| PTR | ns1.your-server.de | ||||||
| A | 213.133.100.102🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1 | ||||||
| PTR | ns1.your-server.de | ||||||
| NS | ns.second-ns.com | ||||||
| A | 2a01:4f8:0:a101::b:1🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| PTR | ns.second-ns.com | ||||||
| A | 213.239.204.242🇩🇪 Hetzner213.239.192.0/18 HETZNER-RZ-NBG-BLK2 | ||||||
| PTR | ns.second-ns.com | ||||||
| NS | ns3.second-ns.de | ||||||
| A | 2001:67c:192c::add:b3🇩🇪 NORIS-NETWORK2001:67c:192c::/48 | ||||||
| PTR | ns3.second-ns.de | ||||||
| A | 193.47.99.4🇩🇪 NORIS-NETWORK193.47.99.0/24 | ||||||
| PTR | ns3.second-ns.de | ||||||
| MX | mail.lehrerapp.de ⭐ | ||||||
| A | 78.46.134.45🇩🇪 Hetzner78.46.0.0/15 HETZNER-RZ-NBG-BLK5 | ||||||
| PTR | www.lehrerapp.de | ||||||
| TXT | v=spf1 a mx ptr a:dedi3339.your-server.de ip4:213.133.121.89 ~all | ||||||
| SOA | ns1.your-server.depostmaster@your-server.de 2026-01-14 #0 | ||||||
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=1778518947 | ||||||
Subdomains
Same first word
lehrerapp.de |
DNS History
5 records (5 active, 0 former)
●NSns.second-ns.com2015-07-20 → 2026-05-11 · 2 obs
● 2026-05-11 17:22:46
●NSns1.your-server.de2015-07-20 → 2026-05-11 · 2 obs
● 2026-05-11 17:22:46
●NSns3.second-ns.de2015-07-20 → 2026-05-11 · 2 obs
● 2026-05-11 17:22:46
●MXmail.lehrerapp.de2015-07-20 → 2026-05-11 · 2 obs
● 2026-05-11 17:22:46
●A78.46.134.452015-07-20 → 2026-05-11 · 2 obs
● 2026-05-11 17:22:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | a.nic.de, f.nic.de, z.nic.de | - |
| lehrerapp.de | ns3.second-ns.de, ns.second-ns.com, ns1.your-server.de | 4 records |
✅ Authoritative Response
Server:193.47.99.4
NS records: ns3.second-ns.de, ns.second-ns.com, ns1.your-server.de
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for lehrerapp.de (unsigned zone)
⏱️ Timing
Total: 1139ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 78.46.134.45 |
| NS | 3 | ns3.second-ns.de, ns.second-ns.com... |
| MX | 1 | mail.lehrerapp.de (pri: 10) |
| TXT | 1 | v=spf1 a mx ptr a:dedi3339.your-server.d |
| SOA | 1 | ns1.your-server.de postmaster.your-serve |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns1.your-server.de, ns3.second-ns.de, ns1.your-server.de...)
Analysis
Hierarchy
lehrerapp.de is a parent of mail.lehrerapp.de and www.lehrerapp.de.
IP Addresses
lehrerapp.de resolves to one IP number: 78.46.134.45.
Other host names such as www.lehrerapp.de and mail.lehrerapp.de share IP numbers with lehrerapp.de.
Name Servers
lehrerapp.de is delegated to three name servers ns.second-ns.com, ns3.second-ns.de and ns1.your-server.de.
lehrerapp.de at least partially shares name servers with other domains, for instance 129.235.167.in-addr.arpa, datenrausch.com, f.c.4.a.7.1.c.0.8.f.4.0.1.0.a.2.ip6.arpa, jesteburger-autowerkstatt.com and diversity-is-us.de.
Host names with two IP numbers:
ns.second-ns.com points to: 2a01:4f8:0:a101::b:1 and 213.239.204.242.
ns3.second-ns.de points to: 2001:67c:192c::add:b3 and 193.47.99.4.
ns1.your-server.de points to: 2a01:4f8:0:1::5ddc:1 and 213.133.100.102.
Mail Servers
lehrerapp.de is handled by a single mail server, mail.lehrerapp.de.
mail.lehrerapp.de resolves to IP 78.46.134.45.