duc.nu - dns.ninja
duc.nu
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 | id:109bb624-bcc8-450a-b4d2-b712b2bc956c | ||||||
| TXT | NU zone update: 2026-06-25 20:00:48 +0000 (EPOCH 1782417648) (auto) | ||||||
| SOA | catcher-in-the-rye.nic.nuhostmaster@nic.nu serial=1782417706 | ||||||
PTR for
MX for
duc.nu |
Subdomains
Same first word
Similar names
DNS History
17 records (6 active, 11 former)
○NSns.vuurwerk.nl2008-11-11 → 2016-12-03 · 4 obs
● 2016-12-03 09:45:52
○ 2017-01-13 23:08:14
○ 2026-06-25 20:08:30
●NSns0.transip.net2020-10-15 → 2026-06-25 · 3 obs
● 2020-10-15 11:04:52
● 2026-06-25 20:08:30
○NSns0.transip.nl2017-08-11 → 2017-08-29 · 5 obs
● 2017-08-11 23:37:24
● 2017-08-29 22:48:28
○ 2020-10-15 11:04:52
○ 2026-06-25 20:08:30
○NSns1.cloud.tele2.nl2017-01-13 → 2017-01-13 · 4 obs
● 2017-01-13 23:08:14
○ 2017-08-11 23:37:24
○ 2026-06-25 20:08:30
○NSns1.transip.net2017-08-11 → 2017-08-29 · 5 obs
● 2017-08-11 23:37:24
● 2017-08-29 22:48:28
○ 2020-10-15 11:04:52
○ 2026-06-25 20:08:30
●NSns1.transip.nl2020-10-15 → 2026-06-25 · 3 obs
● 2020-10-15 11:04:52
● 2026-06-25 20:08:30
○NSns2.cloud.tele2.nl2017-01-13 → 2017-01-13 · 4 obs
● 2017-01-13 23:08:14
○ 2017-08-11 23:37:24
○ 2026-06-25 20:08:30
●NSns2.transip.eu2017-08-11 → 2026-06-25 · 3 obs
● 2017-08-11 23:37:24
● 2026-06-25 20:08:30
○NSns2.vuurwerk.net2008-11-11 → 2016-12-03 · 4 obs
● 2016-12-03 09:45:52
○ 2017-01-13 23:08:14
○ 2026-06-25 20:08:30
○NSns3.vuurwerk.net2008-11-11 → 2016-12-03 · 4 obs
● 2016-12-03 09:45:52
○ 2017-01-13 23:08:14
○ 2026-06-25 20:08:30
●MXduc.nu2017-08-11 → 2026-06-25 · 3 obs
● 2017-08-11 23:37:24
● 2026-06-25 20:08:30
○MXfallback.vuurwerk.nl2008-11-11 → 2017-01-13 · 4 obs
● 2017-01-13 23:08:14
○ 2017-08-11 23:37:24
○ 2026-06-25 20:08:30
○MXmail.duc.nu2008-11-11 → 2017-01-13 · 4 obs
● 2017-01-13 23:08:14
○ 2017-08-11 23:37:24
○ 2026-06-25 20:08:30
●MXrelay.transip.nl2017-08-11 → 2026-06-25 · 3 obs
● 2017-08-11 23:37:24
● 2026-06-25 20:08:30
●A37.97.138.202017-08-11 → 2026-06-25 · 3 obs
● 2017-08-11 23:37:24
● 2026-06-25 20:08:30
○A62.148.178.2442008-11-11 → 2008-11-11 · 3 obs
○ 2015-08-05 03:11:08
○ 2026-06-25 20:08:30
○A85.214.123.1952015-08-05 → 2017-01-13 · 5 obs
● 2015-08-05 03:11:08
● 2017-01-13 23:08:14
○ 2017-08-11 23:37:24
○ 2026-06-25 20:08:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| nu | a.ns.nu, c.ns.nu, d.ns.nu, m.ns.nu... | 12 records |
| duc.nu | ns0.transip.net, ns2.transip.eu, ns1.transip.nl | - |
✅ Authoritative Response
Server:195.8.195.195
NS records: ns0.transip.net, ns2.transip.eu, ns1.transip.nl
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 2677ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 37.97.138.20 |
| NS | 3 | ns0.transip.net, ns2.transip.eu... |
| MX | 2 | relay.transip.nl (pri: 20), duc.nu (pri: 10) |
| TXT | 1 | v=spf1 include:_spf.transip.email ip4:37 |
| SOA | 1 | ns0.transip.net hostmaster.transip.nl |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (a.ns.nu, a.ns.nu, c.ns.nu...)
Analysis
Hierarchy
duc.nu sits above mail.duc.nu, www.duc.nu and server.duc.nu in the domain hierarchy.
Mail Server Role
duc.nu acts as its own mail server.
relay.transip.nl is a mail server commonly deployed alongside duc.nu.
IP Addresses
duc.nu points to a single IP number: 37.97.138.20.
fmulder.com, adje.net, nijverbouw.com and server.duc.nu are examples of host names that share IP numbers with duc.nu.
Name Servers
duc.nu carries NS records delegating to ns2.transip.eu, ns0.transip.net and ns1.transip.nl.
There is at least partial name server overlap between duc.nu and other domains — hervormdmeerkerk.nl, significant.eu, truevaluelanguage.nl and two more among them.
ns2.transip.eu, ns0.transip.net and ns1.transip.nl are three hostnames that each resolve to a pair of IP addresses: ns2.transip.eu to 37.97.199.195 and 2a01:7c8:f:c1f::195, ns0.transip.net to 195.135.195.195 and 2a01:7c8:dddd:195::195, and ns1.transip.nl to 195.8.195.195 and 2a01:7c8:7000:195::195.
Mail Servers
duc.nu relies on two mail servers for delivery — duc.nu and relay.transip.nl.
duc.nu shares mail servers — at least in part — with other domains, including maartengeevers.nl, kerstmarkt-duitsland.com, projectcast.eu and two others.
These mail servers are frequently used alongside mail servers aspmx.l.google.com, alt1.aspmx.l.google.com, mx.transip.email and 5 other.
Host names resolving to four IP addresses:
relay.transip.nl resolves to four IP addresses — 149.210.149.12, 149.210.149.29, 2a01:7c8:7c8::12 and 2a01:7c8:7c8::29.
Host names pointing to a single IP address:
The hostname duc.nu resolves to 37.97.138.20.