schul-cloud.dev - robtex.com
schul-cloud.dev
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.open-telekom-cloud.com ⭐ | ||||||
| A | 80.158.48.19🇩🇪 AS687880.158.48.0/20 belongs to 80.158.32.0/19 | ||||||
| NS | ns2.open-telekom-cloud.com | ||||||
| A | 93.188.242.252🇩🇪 AS687893.188.242.0/24 belongs to 93.188.240.0/21 delegated by SCZN-AS to DTAG for OTC | ||||||
| PTR | ns2.open-telekom-cloud.com | ||||||
| MX | postbuechse.schul-cloud.dev ⭐ | ||||||
| A | 2a01:4f8:c17:178e::1🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| A | 2a01:4f8:c2c:b0e2::1🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| A | 49.12.33.128🇩🇪 Hetzner49.12.0.0/16 HETZNER-DC | ||||||
| PTR | static.128.33.12.49.clients.your-server.de | ||||||
| A | 116.203.213.90🇩🇪 Hetzner116.203.0.0/16 HETZNER-DC | ||||||
| PTR | static.90.213.203.116.clients.your-server.de | ||||||
| TXT | v=spf1 mx a -all | ||||||
| SOA | ns1.open-telekom-cloud.comdevops@schul-cloud.org serial=1 | ||||||
dev
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns-tld1.charlestonroadregistry.com ⭐ | ||||||
| NS | ns-tld2.charlestonroadregistry.com | ||||||
| NS | ns-tld3.charlestonroadregistry.com | ||||||
| NS | ns-tld4.charlestonroadregistry.com | ||||||
| NS | ns-tld5.charlestonroadregistry.com | ||||||
| SOA | ns-tld1.charlestonroadregistry.comcloud-dns-hostmaster@google.com serial=1 | ||||||
Subdomains
postbuechse.schul-cloud.dev |
Same first word
schul-cloud.dev |
DNS History
3 records (3 active, 0 former)
●NSns1.open-telekom-cloud.com2020-04-02 → 2026-03-27 · 2 obs
● 2026-03-27 14:19:18
●NSns2.open-telekom-cloud.com2020-04-02 → 2026-03-27 · 2 obs
● 2026-03-27 14:19:18
●MXpostbuechse.schul-cloud.dev2020-04-02 → 2026-03-27 · 2 obs
● 2026-03-27 14:19:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| dev | ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com... | - |
| schul-cloud.dev | ns1.open-telekom-cloud.com, ns2.open-telekom-cloud.com | - |
✅ Authoritative Response
Server:93.188.242.252
NS records: ns1.open-telekom-cloud.com, ns2.open-telekom-cloud.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for schul-cloud.dev (unsigned zone)
⏱️ Timing
Total: 727ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | ns2.open-telekom-cloud.com, ns1.open-telekom-cloud.com |
| MX | 1 | postbuechse.schul-cloud.dev (pri: 10) |
| TXT | 1 | v=spf1 mx a -all |
| SOA | 1 | ns1.open-telekom-cloud.com devops.schul- |
Analysis
Hierarchy
The parent of postbuechse.schul-cloud.dev is schul-cloud.dev.
Name Servers
Two name servers ns1.open-telekom-cloud.com and ns2.open-telekom-cloud.com handle the delegation for schul-cloud.dev.
schul-cloud.dev shares the same name server setup as other domains, for instance portal.schule-sh.de, 192.44.160.in-addr.arpa, 12.30.164.in-addr.arpa, 50.158.80.in-addr.arpa and 201.44.160.in-addr.arpa.
schul-cloud.dev at least partially shares name servers with other domains, for instance test.open-telekom-cloud.com, 18.158.80.in-addr.arpa, moodle.bw.schule, almaphil.de and 196.44.160.in-addr.arpa.
Host names with one IP:
ns1.open-telekom-cloud.com points to: 80.158.48.19
ns2.open-telekom-cloud.com points to: 93.188.242.252
Mail Servers
schul-cloud.dev is handled by a single mail server, postbuechse.schul-cloud.dev.
Host postbuechse.schul-cloud.dev points to four IP numbers: 2a01:4f8:c17:178e::1, 2a01:4f8:c2c:b0e2::1, 49.12.33.128 and 116.203.213.90.