21st.nl - robtex.com
21st.nl
nl
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns1.dns.nl ⭐ | ||||||
| NS | ns3.dns.nl | ||||||
| NS | ns4.dns.nl | ||||||
| TXT | nl zone update: 2026-08-07 08:00:03 +0000 (EPOCH 1786089603) | ||||||
| SOA | ns1.dns.nldns@sidn.nl 2026-08-07 #16 | ||||||
MX for
21st.nl |
Same first word
Similar names
DNS History
12 records (6 active, 6 former)
●NSns0.transip.net2026-07-12 → 2026-08-07 · 3 obs
● 2026-07-12 15:35:42
● 2026-08-07 08:46:38
○NSns1.sonexo.eu2015-08-16 → 2020-02-16 · 4 obs
● 2020-02-16 08:20:44
○ 2026-07-12 15:35:42
○ 2026-08-07 08:46:38
●NSns1.transip.nl2026-07-12 → 2026-08-07 · 3 obs
● 2026-07-12 15:35:42
● 2026-08-07 08:46:38
○NSns2.sonexo.com2015-08-16 → 2020-02-16 · 4 obs
● 2020-02-16 08:20:44
○ 2026-07-12 15:35:42
○ 2026-08-07 08:46:38
●NSns2.transip.eu2026-07-12 → 2026-08-07 · 3 obs
● 2026-07-12 15:35:42
● 2026-08-07 08:46:38
●MX21st.nl2026-07-12 → 2026-08-07 · 3 obs
● 2026-07-12 15:35:42
● 2026-08-07 08:46:38
○MXmailx.sonexo.com2020-02-16 → 2020-02-16 · 3 obs
○ 2026-07-12 15:35:42
○ 2026-08-07 08:46:38
●A2a01:7c8:3:1337::272026-07-12 → 2026-08-07 · 3 obs
● 2026-07-12 15:35:42
● 2026-08-07 08:46:38
○A2a01:7c8:aabc:2e:5054:ff:fe24:1b7d2020-02-16 → 2020-02-16 · 4 obs
● 2020-02-16 08:20:44
○ 2026-07-12 15:35:42
○ 2026-08-07 08:46:38
○A37.97.135.1292015-12-02 → 2020-02-16 · 5 obs
● 2015-12-02 22:09:32
● 2020-02-16 08:20:44
○ 2026-07-12 15:35:42
○ 2026-08-07 08:46:38
●A37.97.254.272026-07-12 → 2026-08-07 · 3 obs
● 2026-07-12 15:35:42
● 2026-08-07 08:46:38
○A93.180.66.1112015-08-16 → 2015-08-16 · 3 obs
○ 2015-12-02 22:09:32
○ 2026-08-07 08:46:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| nl | ns4.dns.nl, ns1.dns.nl, ns3.dns.nl | - |
| 21st.nl | ns0.transip.net, ns1.transip.nl, ns2.transip.eu | 2 records |
✅ Authoritative Response
Server:195.135.195.195
NS records: ns0.transip.net, ns1.transip.nl, ns2.transip.eu
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 697ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 37.97.254.27 |
| AAAA | 1 | 2a01:7c8:3:1337::27 |
| NS | 3 | ns0.transip.net, ns1.transip.nl... |
| MX | 1 | 21st.nl (pri: 10) |
| TXT | 1 | v=spf1 ~all |
| SOA | 1 | ns0.transip.net hostmaster.transip.nl |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.transip.nl, ns1.transip.nl)
Analysis
Mail Server Role
21st.nl acts as its own mail server.
IP Addresses
21st.nl directs to two IP numbers, 37.97.254.27 and 2a01:7c8:3:1337::27
Additional host names — aircodump.com, mail.sowo.kr, kientz.nl and two others — share IP numbers with 21st.nl.
Name Servers
21st.nl carries NS records delegating to ns2.transip.eu, ns0.transip.net and ns1.transip.nl.
21st.nl has at least partial name server overlap with other domains, such as q-alm.nl, onki.nl, keypersonnel.nl and two others.
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
21st.nl has a single mail server: 21st.nl itself.
21st.nl has two IP addresses: 37.97.254.27 and 2a01:7c8:3:1337::27.