oxygen.cz - robtex.com
oxygen.cz
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.one.cz ⚠️ Not in zone NS records | ||||||
| A | 2001:470:6f:864::1🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA | ||||||
| PTR | ns1.one.cz | ||||||
| A | 46.149.113.151🇨🇿 ALFSERVIS-AS46.149.112.0/20 Route object 1 AlfServis s.r.o. | ||||||
| PTR | ns1.one.cz | ||||||
| NS | ns2.one.cz ⚠️ Not in zone NS records | ||||||
| A | 193.85.20.140🇨🇿 TMOBILE-CZ193.85.0.0/16 T-Mobile Czech Republic a.s. | ||||||
| PTR | ns2.one.cz | ||||||
| NS | ns3.one.cz ⚠️ Not in zone NS records | ||||||
| A | 2001:470:6f:30f::1:1🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA | ||||||
| PTR | ns3.one.cz | ||||||
| A | 46.149.113.187🇨🇿 ALFSERVIS-AS46.149.112.0/20 Route object 1 AlfServis s.r.o. | ||||||
| PTR | ns3.one.cz | ||||||
cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.ns.nic.cz ⭐ | ||||||
| NS | b.ns.nic.cz | ||||||
| NS | c.ns.nic.cz | ||||||
| NS | d.ns.nic.cz | ||||||
| SOA | a.ns.nic.czhostmaster@nic.cz serial=1778802435 | ||||||
Same first word
Similar names
DNS History
7 records (3 active, 4 former)
○NSalfa.ns.active24.cz2008-12-03 → 2008-12-03 · 3 obs
● 2008-12-03 10:25:20
○ 2015-08-02 04:29:56
○ 2026-05-15 00:23:46
○ 2015-08-02 04:29:56
○ 2026-05-15 00:23:46
○NSbeta.ns.active24.cz2008-12-03 → 2008-12-03 · 3 obs
● 2008-12-03 10:25:20
○ 2015-08-02 04:29:56
○ 2026-05-15 00:23:46
○ 2015-08-02 04:29:56
○ 2026-05-15 00:23:46
●NSns1.one.cz2026-05-15 → 2026-05-15 · 3 obs
○ 2015-08-02 04:29:56
● 2026-05-15 00:23:44
● 2026-05-15 00:23:46
● 2026-05-15 00:23:44
● 2026-05-15 00:23:46
●NSns2.one.cz2026-05-15 → 2026-05-15 · 3 obs
○ 2015-08-02 04:29:56
● 2026-05-15 00:23:44
● 2026-05-15 00:23:46
● 2026-05-15 00:23:44
● 2026-05-15 00:23:46
●NSns3.one.cz2026-05-15 → 2026-05-15 · 3 obs
○ 2015-08-02 04:29:56
● 2026-05-15 00:23:44
● 2026-05-15 00:23:46
● 2026-05-15 00:23:44
● 2026-05-15 00:23:46
○MXmail.oxygen.cz2008-12-03 → 2008-12-03 · 3 obs
● 2008-12-03 10:25:20
○ 2015-08-02 04:29:56
○ 2026-05-15 00:23:46
○ 2015-08-02 04:29:56
○ 2026-05-15 00:23:46
○A82.208.49.192008-12-03 → 2008-12-03 · 3 obs
● 2008-12-03 10:25:20
○ 2015-08-02 04:29:56
○ 2026-05-15 00:23:46
○ 2015-08-02 04:29:56
○ 2026-05-15 00:23:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| oxygen.cz | ns1.one.cz, ns2.one.cz, ns3.one.cz | 5 records |
✅ Authoritative Response
Server:193.85.20.140
NS records: ns1.one.cz, ns2.one.cz, ns3.one.cz
🔒 DNSSEC Status
❌ Bogus (DNSSEC validation failed)
No DNSKEY for oxygen.cz
⏱️ Timing
Total: 1236ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
📌 Glue Records Collected
Total: 5
Out-of-bailiwick: 5 (ns1.one.cz, ns1.one.cz, ns2.one.cz...)
Analysis
Name Servers
oxygen.cz is delegated to three name servers: ns1.one.cz, ns2.one.cz and ns3.one.cz.
oxygen.cz at least partially shares name servers with other domains, for example vdf.cz, works.cz, blansko.eu, dakr.cz and nrw.cz.
These name servers are often used together with a.one.cz and b.one.cz.
Host names with two IPs:
ns1.one.cz points to 2001:470:6f:864::1 and 46.149.113.151.
ns3.one.cz points to 2001:470:6f:30f::1:1 and 46.149.113.187.
Host names with one IP:
ns2.one.cz points to 193.85.20.140.