worldklems.net - robtex.com
worldklems.net
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 129.125.2.212🇳🇱 SURFNET-NL129.125.0.0/16 RUGNET | ||||||
| NS | ns1.surfnet.nl ⭐ | ||||||
| A | 2001:610:1:800a:192:87:106:101🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block | ||||||
| PTR | ns1.surfnet.nl | ||||||
| A | 192.87.106.101🇳🇱 SURFNET-NL192.87.0.0/16 SURFnet CIDR Block IV | ||||||
| PTR | ns1.surfnet.nl | ||||||
| NS | ns1.zurich.surf.net | ||||||
| A | 2001:620:0:9::1103🇨🇭 Switch2001:620::/32 SWITCH, The Swiss Education & Research Network | ||||||
| PTR | ns1.zurich.surf.net | ||||||
| A | 195.176.255.9🇨🇭 Switch195.176.224.0/19 SWITCH-AGGR.102 | ||||||
| PTR | ns1.zurich.surf.net | ||||||
| NS | ns2.surfnet.nl | ||||||
| A | 2001:610:3:200a:192:87:36:2🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block | ||||||
| PTR | ns2.surfnet.nl | ||||||
| A | 192.87.36.2🇳🇱 SURFNET-NL192.87.0.0/16 SURFnet CIDR Block IV | ||||||
| PTR | ns2.surfnet.nl | ||||||
| NS | ns3.surfnet.nl | ||||||
| A | 2001:610:0:800c:195:169:124:71🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block | ||||||
| PTR | ns3.surfnet.nl | ||||||
| A | 195.169.124.71🇳🇱 SURFNET-NL195.169.0.0/16 SURFnet CIDR Block VI | ||||||
| MX | smtpextern.rug.nl ⭐ | ||||||
| A | 129.125.2.94🇳🇱 SURFNET-NL129.125.0.0/16 RUGNET | ||||||
| TXT | HARICA-9kB1rABAl3sC32qCOIl | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | ns1.surfnet.nldns-beheer@surf.nl 2026-07-23 #1 | ||||||
net
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1785046927 | ||||||
Subdomains
www.worldklems.net |
Same first word
worldklems.net |
DNS History
13 records (6 active, 7 former)
○NSns.netground.nl2015-08-11 → 2016-04-23 · 4 obs
● 2016-04-23 05:14:40
○ 2016-11-19 09:22:40
○ 2026-07-26 06:45:12
○NSns01.is.nl2016-11-19 → 2017-07-01 · 5 obs
● 2016-11-19 09:22:40
● 2017-07-01 19:13:20
○ 2026-03-19 19:57:22
○ 2026-07-26 06:45:12
○NSns02.is.nl2016-11-19 → 2017-07-01 · 5 obs
● 2016-11-19 09:22:40
● 2017-07-01 19:13:20
○ 2026-03-19 19:57:22
○ 2026-07-26 06:45:12
○NSns03.is.nl2016-11-19 → 2017-07-01 · 5 obs
● 2016-11-19 09:22:40
● 2017-07-01 19:13:20
○ 2026-03-19 19:57:22
○ 2026-07-26 06:45:12
●NSns1.surfnet.nl2026-03-19 → 2026-07-26 · 3 obs
● 2026-03-19 19:57:22
● 2026-07-26 06:45:12
●NSns1.zurich.surf.net2026-03-19 → 2026-07-26 · 3 obs
● 2026-03-19 19:57:22
● 2026-07-26 06:45:12
○NSns2.netground.com2015-08-11 → 2016-04-23 · 4 obs
● 2016-04-23 05:14:40
○ 2016-11-19 09:22:40
○ 2026-07-26 06:45:12
●NSns2.surfnet.nl2026-03-19 → 2026-07-26 · 3 obs
● 2026-03-19 19:57:22
● 2026-07-26 06:45:12
○NSns3.netground.eu2015-08-11 → 2016-04-23 · 4 obs
● 2016-04-23 05:14:40
○ 2016-11-19 09:22:40
○ 2026-07-26 06:45:12
●NSns3.surfnet.nl2026-03-19 → 2026-07-26 · 3 obs
● 2026-03-19 19:57:22
● 2026-07-26 06:45:12
●MXsmtpextern.rug.nl2026-03-19 → 2026-07-26 · 2 obs
● 2026-07-26 06:45:12
○A129.125.14.262015-08-11 → 2017-07-01 · 4 obs
● 2017-07-01 19:13:20
○ 2026-03-19 19:57:22
○ 2026-07-26 06:45:12
●A129.125.2.2122026-03-19 → 2026-07-26 · 3 obs
● 2026-03-19 19:57:22
● 2026-07-26 06:45:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | m.gtld-servers.net, k.gtld-servers.net, b.gtld-servers.net, f.gtld-servers.net... | - |
| worldklems.net | ns1.surfnet.nl, ns2.surfnet.nl, ns3.surfnet.nl, ns1.zurich.surf.net | 2 records |
✅ Authoritative Response
Server:192.87.36.2
NS records: ns1.surfnet.nl, ns2.surfnet.nl, ns3.surfnet.nl, ns1.zurich.surf.net
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 598ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 129.125.2.212 |
| NS | 4 | ns1.surfnet.nl, ns2.surfnet.nl... |
| MX | 1 | smtpextern.rug.nl (pri: 10) |
| TXT | 2 | v=spf1 -all, HARICA-9kB1rABAl3sC32qCOIl |
| SOA | 1 | ns1.surfnet.nl dns-beheer.surf.nl |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.zurich.surf.net, ns1.zurich.surf.net)
Analysis
Hierarchy
www.worldklems.net is delegated beneath worldklems.net.
IP Addresses
worldklems.net has exactly one IP address — 129.125.2.212.
sigsem.org, knir.nl, athenespelen.com plus two other host names have IP numbers in common with worldklems.net.
Name Servers
Four name servers handle the delegation for worldklems.net: ns1.surfnet.nl, ns2.surfnet.nl, ns3.surfnet.nl and ns1.zurich.surf.net.
There is at least partial name server overlap between worldklems.net and other domains — hbo-kennisbank.nl, ia.surf.nl, hollandfoodacademy.com and two more among them.
These name servers regularly appear alongside arachne.leidenuniv.nl, ns6.eur.nl, ns2.maastrichtuniversity.eu and 3 other name servers in NS record sets.
All four hostnames — ns1.surfnet.nl, ns2.surfnet.nl, ns3.surfnet.nl and ns1.zurich.surf.net — resolve to two IP numbers apiece: ns1.surfnet.nl to 192.87.106.101 and 2001:610:1:800a:192:87:106:101; ns2.surfnet.nl to 192.87.36.2 and 2001:610:3:200a:192:87:36:2; ns3.surfnet.nl to 195.169.124.71 and 2001:610:0:800c:195:169:124:71; ns1.zurich.surf.net to 195.176.255.9 and 2001:620:0:9::1103.
Mail Servers
worldklems.net uses one mail server — smtpextern.rug.nl.
The mail server setup of worldklems.net matches that of other domains such as hadrianus.it, phenoflow.org, genenetwork.nl and two others.
worldklems.net and other domains — sigsem.org for instance — share at least some mail servers.
smtpextern.rug.nl directs to just one IP number, 129.125.2.94.