prepstudy.ch - dns.ninja
prepstudy.ch
| DNSSEC | ⚠️ Not signed | ||||||
| A | 147.86.1.63🇨🇭 Switch147.86.0.0/16 FHNW | ||||||
| PTR | v000352.fhnw.ch | ||||||
| NS | ns1.fhnw.ch ⭐ | ||||||
| A | 147.86.3.20🇨🇭 Switch147.86.0.0/16 FHNW | ||||||
| PTR | ns1.fhnw.ch | ||||||
| NS | ns3.fhnw.ch | ||||||
| A | 147.86.4.22🇨🇭 Switch147.86.0.0/16 FHNW | ||||||
| PTR | ns3.fhnw.ch | ||||||
| NS | ns5.fhnw.ch | ||||||
| A | 13.94.236.250🇳🇱 Microsoft13.64.0.0/11 MICROSOFT | ||||||
| PTR | ns5.fhnw.ch | ||||||
| SOA | ns1.fhnw.chnoc@fhnw.ch 2024-12-21 #7 | ||||||
ch
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.nic.ch ⭐ | ||||||
| NS | b.nic.ch | ||||||
| NS | d.nic.ch | ||||||
| NS | e.nic.ch | ||||||
| NS | f.nic.ch | ||||||
| SOA | a.nic.chdns-operation@switch.ch 2026-10-25 #3 | ||||||
Same first word
Similar names
Previous names
Next names
DNS History
4 records (4 active, 0 former)
●A147.86.1.632026-10-13 → 2026-10-25 · 3 obs
○ 2026-10-22 05:49:36
● 2026-10-25 00:22:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ch | a.nic.ch, b.nic.ch, d.nic.ch, e.nic.ch... | 10 records |
| prepstudy.ch | ns5.fhnw.ch, ns3.fhnw.ch, ns1.fhnw.ch | 1 record |
✅ Authoritative Response
Server:13.94.236.250
NS records: ns5.fhnw.ch, ns3.fhnw.ch, ns1.fhnw.ch
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for prepstudy.ch (unsigned zone)
⏱️ Timing
Total: 1239ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 147.86.1.63 |
| NS | 3 | ns3.fhnw.ch, ns1.fhnw.ch... |
| SOA | 1 | ns1.fhnw.ch noc.fhnw.ch |
📌 Glue Records Collected
Total: 11
In-bailiwick: 10 (a.nic.ch, a.nic.ch, b.nic.ch...)
Out-of-bailiwick: 1 (ns5.fhnw.ch)
Analysis
IP Addresses
prepstudy.ch directs to one IP number, which is 147.86.1.63.
Among the host names that share IP numbers with prepstudy.ch are vali50plus.ch, quaktiv.ch, careviage.ch and two others.
Name Servers
prepstudy.ch carries NS records delegating to ns1.fhnw.ch, ns3.fhnw.ch and ns5.fhnw.ch.
prepstudy.ch has at least partial name server overlap with other domains, such as differenzsensible-lehre.ch, guida-pig.ch, swissanon.ch and two others.
ns1.fhnw.ch points to 147.86.3.20; ns3.fhnw.ch points to 147.86.4.22; ns5.fhnw.ch points to 13.94.236.250 — each hostname maps to exactly one IP address.