c4-open.nu - robtex.com
c4-open.nu
| DNSSEC | ⚠️ Not signed | ||||||
| A | 193.234.30.61🇸🇪 FREPPA-AS193.234.30.0/24 | ||||||
| PTR | system10.svenskadomaner.se | ||||||
| NS | ns1.svenskadomaner.se ⭐ | ||||||
| A | 193.234.30.7🇸🇪 FREPPA-AS193.234.30.0/24 | ||||||
| PTR | ns1.svenskadomaner.se | ||||||
| NS | ns2.svenskadomaner.se | ||||||
| A | 135.181.36.129🇫🇮 Hetzner135.181.0.0/16 HETZNER-DC | ||||||
| PTR | ns2.svenskadomaner.se | ||||||
| NS | ns3.svenskadomaner.se ⚠️ Not in parent delegation | ||||||
| A | 49.12.104.254🇩🇪 Hetzner49.12.0.0/16 HETZNER-DC | ||||||
| PTR | ns3.svenskadomaner.se | ||||||
| MX | mx01.svenskadomaner.se ⭐ | ||||||
| A | 193.234.30.31🇸🇪 FREPPA-AS193.234.30.0/24 | ||||||
| PTR | mx01.svenskadomaner.se | ||||||
| MX | mx02.svenskadomaner.se(10) | ||||||
| A | 172.104.149.223🇩🇪 AKAMAI-LINODE-AP172.104.128.0/19 Akamai Technologies | ||||||
| PTR | mx02.svenskadomaner.se | ||||||
| TXT | v=spf1 ip4:193.234.30.60 +a +mx +ip4:193.234.30.42 +ip4:193.234.30.52 +includ... | ||||||
| SOA | ns1.svenskadomaner.seadmin@svenskadomaner.se 2026-03-02 #1 | ||||||
nu
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | catcher-in-the-rye.nic.nu ⭐ | ||||||
| NS | a.ns.nu | ||||||
| NS | c.ns.nu | ||||||
| NS | d.ns.nu | ||||||
| NS | m.ns.nu | ||||||
| NS | y.ns.nu | ||||||
| NS | z.ns.nu | ||||||
| TXT | NU zone update: 2026-04-13 18:08:28 +0000 (EPOCH 1776103708) (auto) | ||||||
| TXT | id:c2b0648f-6837-4f55-9b61-dd8ee0e77e4f | ||||||
| SOA | catcher-in-the-rye.nic.nuhostmaster@nic.nu serial=1776103766 | ||||||
Previously NS for
c4-open.nu |
Same first word
c4-open.nu |
DNS History
10 records (6 active, 4 former)
○NSa.ns.c4-open.nu2015-11-23 → 2016-07-14 · 4 obs
● 2016-07-14 01:43:36
○ 2020-01-15 07:10:32
○ 2026-04-13 18:44:06
○NSc4-open.nu2015-11-23 → 2016-07-14 · 4 obs
● 2016-07-14 01:43:36
○ 2020-01-15 07:10:32
○ 2026-04-13 18:44:06
●NSns1.svenskadomaner.se2020-01-15 → 2026-04-13 · 3 obs
● 2020-01-15 07:10:32
● 2026-04-13 18:44:06
●NSns2.svenskadomaner.se2020-01-15 → 2026-04-13 · 3 obs
● 2020-01-15 07:10:32
● 2026-04-13 18:44:06
●NSns3.svenskadomaner.se2026-04-11 → 2026-04-13 · 3 obs
● 2026-04-11 10:33:20
● 2026-04-13 18:44:06
●MXmx01.svenskadomaner.se2020-01-15 → 2026-04-13 · 2 obs
● 2026-04-13 18:44:06
●MXmx02.svenskadomaner.se2020-01-15 → 2026-04-13 · 2 obs
● 2026-04-13 18:44:06
○A192.121.157.1922015-11-23 → 2016-07-14 · 4 obs
● 2016-07-14 01:43:36
○ 2020-01-15 07:10:32
○ 2026-04-13 18:44:06
○A193.234.30.522020-01-15 → 2020-01-15 · 4 obs
● 2020-01-15 07:10:32
○ 2026-04-11 10:33:20
○ 2026-04-13 18:44:06
●A193.234.30.612026-04-11 → 2026-04-13 · 3 obs
● 2026-04-11 10:33:20
● 2026-04-13 18:44:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| nu | d.ns.nu, z.ns.nu, y.ns.nu, c.ns.nu... | - |
| c4-open.nu | ns1.svenskadomaner.se, ns2.svenskadomaner.se | - |
✅ Authoritative Response
Server:193.234.30.7
NS records: ns1.svenskadomaner.se, ns2.svenskadomaner.se
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for c4-open.nu (unsigned zone)
⏱️ Timing
Total: 1223ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 193.234.30.61 |
| NS | 3 | ns3.svenskadomaner.se, ns2.svenskadomaner.se... |
| MX | 2 | mx01.svenskadomaner.se (pri: 0), mx02.svenskadomaner.se (pri: 10) |
| TXT | 1 | v=spf1 ip4:193.234.30.60 +a +mx +ip4:193 |
| SOA | 1 | ns1.svenskadomaner.se admin.svenskadoman |
Analysis
IP Addresses
c4-open.nu resolves to a single IP: 193.234.30.61.
Other host names, for instance gothem.se, 168.nu, snowangel.se, bantorgetupphandling.se and polarstad.se share IP numbers with c4-open.nu.
Name Servers
c4-open.nu delegates to three name servers: ns1.svenskadomaner.se, ns2.svenskadomaner.se and ns3.svenskadomaner.se.
c4-open.nu shares some name servers with other domains, for example boselinder.se, begemans.se, avtprofile.com, 2bsec.se and bodensgymnastikklubb.se.
Host names with a single IP: ns1.svenskadomaner.se points to 193.234.30.7; ns2.svenskadomaner.se points to 135.181.36.129; ns3.svenskadomaner.se points to 49.12.104.254.
Mail Servers
c4-open.nu is served by two mail servers: mx01.svenskadomaner.se and mx02.svenskadomaner.se.
c4-open.nu shares the mail server setup with other domains, for example yourstay.se, festljud.se, fatunicornarmy.com, domain99.com and jepeproduction.com.
c4-open.nu shares some mail servers with other domains, at least partially; for instance gbgorienthus.com, rosborgentreprenad.se, pomme.nu, leyjurist.se and careofeyes.se.
Host names with a single IP:
mx01.svenskadomaner.se points to 193.234.30.31
mx02.svenskadomaner.se points to 172.104.149.223