sec.nl - robtex.com

sec.nl

DNSSEC🔒 Signed (DS record present)
NSns1.surfnet.nl ⭐
A2001:610:1:800a:192:87:106:101🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block
PTRns1.surfnet.nl
A192.87.106.101🇳🇱 SURFNET-NL192.87.0.0/16 SURFnet CIDR Block IV
PTRns1.surfnet.nl
NSns1.zurich.surf.net
A2001:620:0:9::1103🇨🇭 Switch2001:620::/32 SWITCH, The Swiss Education & Research Network
PTRns1.zurich.surf.net
A195.176.255.9🇨🇭 Switch195.176.224.0/19 SWITCH-AGGR.102
PTRns1.zurich.surf.net
NSns2.surfnet.nl
A2001:610:3:200a:192:87:36:2🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block
PTRns2.surfnet.nl
A192.87.36.2🇳🇱 SURFNET-NL192.87.0.0/16 SURFnet CIDR Block IV
PTRns2.surfnet.nl
NSns3.surfnet.nl
A2001:610:0:800c:195:169:124:71🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block
PTRns3.surfnet.nl
A195.169.124.71🇳🇱 SURFNET-NL195.169.0.0/16 SURFnet CIDR Block VI
MXmx10.surfmailfilter.nl ⭐
A2001:610:188:173:192:87:106:168🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block
A192.87.106.168🇳🇱 SURFNET-NL192.87.0.0/16 SURFnet CIDR Block IV
PTRmx10.surfmailfilter.nl
MXmx11.surfmailfilter.nl ⭐
A2001:610:1:40ab:195:169:13:8🇳🇱 SURFNET-NL2001:610::/29 SURFnet IPv6 block
PTRmx11.surfmailfilter.nl
A195.169.13.8🇳🇱 SURFNET-NL195.169.0.0/16 SURFnet CIDR Block VI
PTRmx11.surfmailfilter.nl
TXTSURF=btv6QXoC9oU4C211
TXTonce the SURFnet ExpertiseCentrum bv
TXTv=spf1 include:_spf.surfmailfilter.nl include:soverin.net -all
SOAns1.surfnet.nldns-beheer@surf.nl 2026-03-12 #1

nl

DNSSEC🔒 Signed (DS record present)
NSns1.dns.nl ⭐ 🔒
NSns3.dns.nl 🔒
NSns4.dns.nl 🔒
TXTnl zone update: 2026-02-17 01:00:01 +0000 (EPOCH 1771290001)
SOAns1.dns.nldns@sidn.nl 2026-02-17 #2

Subdomains

virtuoos.sec.nl
www.sec.nl
drukwerk.sec.nl
anonymous6.sec.nl
anonymous.sec.nl
ip.sec.nl

Same first word

sec.pt
sec.ph
sec.gunma.jp
sec.de.com
sec.co.kr
sec.fi
sec.com.sa
sec.edu.ph
sec.nl
sec.edu.in
sec.ltd
sec.services
sec.tv
sec.or.th
sec.com.pk
sec.news
sec.gd
sec.bz
sec.s3.amazonaws.com
sec.idv.tw
sec.com.pl
sec.gov.tw
sec.eu.com
sec.dev
sec.de
sec.ee
sec.com.gt
sec.email
sec.io
sec.camp
sec.med.sa
sec.ie
sec.army
sec.ch
sec.su
sec.ps
sec.gob.mx
sec.edu.pk
sec.nu
sec.com.ua
sec.claims
sec.im
sec.gw
sec.ba.gov.br
sec.co.th
sec.es
sec.ru
sec.gov.lk
sec.org.do
sec.co.sz
sec.com.tr
sec.rs.ba
sec.dk
sec.fr
sec.edu.sg
sec.com.au
sec.tools
sec.sk
sec.school
sec.uk
sec.ro
sec.or.kr
sec.az
sec.li
sec.lc
sec.gov.gh
sec.hu
sec.gov.mk
sec.systems
sec.act.edu.au
sec.fyi
sec.am
sec.ge
sec.gov.cl
sec.md
sec.ac.cn
sec.name
sec.ac
sec.coop
sec.si
sec.lv
sec.gov.ng
sec.gr
sec.expert
sec.report
sec.info
sec.org
sec.org.rs
sec.org.br
sec.com.cn
sec.lu
sec.academy
sec.dnsalias.org
sec.or.jp
sec.dog
sec.edu
sec.kz
sec.digital
sec.org.ar
sec.solutions
sec.com.tn
sec.vn
sec.life
sec.rs
sec.k12.ar.us
sec.se
sec.net
sec.kim
sec.gov.ph
sec.at
sec.gov.sa
sec.com.br
sec.wiki
sec.promo
sec.my
sec.ca
sec.gov.qa
sec.mywire.org
sec.pb.gov.br
sec.cl
sec.co
sec.ad
sec.co.nz
sec.org.sg
sec.lt
sec.cz
sec.homedns.org
sec.edu.gr
sec.bio
sec.fm
sec.jp
sec.uz
sec.do
sec.co.jp
sec.ua
sec.jp.net
sec.vc
sec.be
sec.kiev.ua
sec.travel
sec.co.za
sec.bg
sec.la
sec.team
sec.com
sec.pl
sec.gov
sec.mk
sec.qld.edu.au
sec.us.com
sec.house
sec.media
sec.edu.cn
sec.ms
sec.re.kr
sec.gob.cl
sec.cat
sec.me
sec.vn.ua
sec.co.uk
sec.com.mt
sec.training
sec.to
sec.it
sec.org.pl
sec.tips

Similar names

esc.com.tw
cse.agency
esc.su
sce.eco
cse.cl
cse.com.my
ecs.ge
esc.ee
esc.services
cse.ru
ces.org.ua
sce.ac.il
esc.gallery
cse.sk
esc.gov.eg
ecs.vn
sce.ie
sce.com.vn
cse.world
cse.tw
sce.gob.ec
ces.co
ces.co.za
esc.ms
cse.org.in
sce.com.cn
ces.ch
ecs.scot
esc.im
ecs.com.mx
cse.bz
cse.srl
ecs.com.au
cse.su
ecs.com.ng
ces.edu.ar
sce.de
esc.solutions
ecs.k12.al.us
ecs.com.pe
ecs.com.pl
cse.com.cy
ecs.or.jp
ecs.org
sce.jobs
cse.gob.ni
ces.design
ecs.mobi
ecs.sucks
esc.by
ecs.ph
esc.sh
ecs.limited
cse.jp
ces.at
esc.ch
ces.vn
ces.gob.gt
ecs.im
cse.com.tw
ces.bg
sce.org.au
ecs.mx
ces.edu.co
esc.com.ua
ecs.hk
ecs.co
esc.in

DNS History

10 records (6 active, 4 former)

201020122014201620182020202220242026NSns1.surfnet.nlns1.zurich.surf.netns2.surfnet.nlns3.surfnet.nlns4.surfnet.nlnsd.surfnet.nlMXmx10.surfmailfilter.nlmx11.surfmailfilter.nlmx-1.mf.surf.netmx-a.mf.surf.net
●NSns1.surfnet.nl2015-08-01 → 2026-03-13 · 3 obs
○ 2009-01-29 21:48:30
● 2015-08-01 22:34:40
● 2026-03-13 15:16:28
●NSns1.zurich.surf.net2015-08-01 → 2026-03-13 · 3 obs
○ 2009-01-29 21:48:30
● 2015-08-01 22:34:40
● 2026-03-13 15:16:28
●NSns2.surfnet.nl2015-08-01 → 2026-03-13 · 3 obs
○ 2009-01-29 21:48:30
● 2015-08-01 22:34:40
● 2026-03-13 15:16:28
●NSns3.surfnet.nl2009-01-29 → 2026-03-13 · 2 obs
● 2009-01-29 21:48:30
● 2026-03-13 15:16:28
○NSns4.surfnet.nl2009-01-29 → 2009-01-29 · 3 obs
● 2009-01-29 21:48:30
○ 2015-08-01 22:34:40
○ 2026-03-13 15:16:28
○NSnsd.surfnet.nl2009-01-29 → 2009-01-29 · 3 obs
● 2009-01-29 21:48:30
○ 2015-08-01 22:34:40
○ 2026-03-13 15:16:28
○MXmx-1.mf.surf.net2009-01-29 → 2017-05-05 · 4 obs
● 2009-01-29 21:48:30
● 2017-05-05 12:29:06
○ 2026-03-03 04:52:58
○ 2026-03-13 15:16:28
○MXmx-a.mf.surf.net2009-01-29 → 2017-05-05 · 4 obs
● 2009-01-29 21:48:30
● 2017-05-05 12:29:06
○ 2026-03-03 04:52:58
○ 2026-03-13 15:16:28
●MXmx10.surfmailfilter.nl2026-03-03 → 2026-03-13 · 3 obs
○ 2017-05-05 12:29:06
● 2026-03-03 04:52:58
● 2026-03-13 15:16:28
●MXmx11.surfmailfilter.nl2026-03-03 → 2026-03-13 · 3 obs
○ 2017-05-05 12:29:06
● 2026-03-03 04:52:58
● 2026-03-13 15:16:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
nlns1.dns.nl, ns4.dns.nl, ns3.dns.nl6 records
sec.nlns1.zurich.surf.net, ns1.surfnet.nl, ns2.surfnet.nl, ns3.surfnet.nl6 records

✅ Authoritative Response

Server: 195.169.124.71

NS records: ns1.zurich.surf.net, ns1.surfnet.nl, ns2.surfnet.nl, ns3.surfnet.nl

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 818ms | Queries: -

📄 Records

TypeCountSample Data
NS4ns3.surfnet.nl, ns1.surfnet.nl...
MX2mx11.surfmailfilter.nl (pri: 10), mx10.surfmailfilter.nl (pri: 10)
TXT3SURF=btv6QXoC9oU4C211, once the SURFnet ExpertiseCentrum bv...
SOA1ns1.surfnet.nl dns-beheer.surf.nl

📌 Glue Records Collected

Total: 12

In-bailiwick: 6 (ns4.dns.nl, ns3.dns.nl, ns1.dns.nl...)

Out-of-bailiwick: 6 (ns1.surfnet.nl, ns1.surfnet.nl, ns2.surfnet.nl...)

Analysis

Hierarchy

sec.nl is a parent of virtuoos.sec.nl, www.sec.nl, drukwerk.sec.nl, anonymous6.sec.nl and anonymous.sec.nl, plus a few other host names.

Name Servers

sec.nl delegates to four name servers: ns1.surfnet.nl, ns2.surfnet.nl, ns3.surfnet.nl and ns1.zurich.surf.net.

sec.nl at least partially shares name servers with other domains, including bezwaarschriftenocw.nl, as1102.net, surfsara.nl, 203.97.145.in-addr.arpa and 220.145.in-addr.arpa.

These name servers are commonly used with ns6.eur.nl, ns2.maastrichtuniversity.eu, ns1.maastrichtuniversity.nl, gm.maastrichtuniversity.nl, ns01.rocmondriaan.nl, ns02.rocmondriaan.nl, ns1.saxion.nl, ns2.saxion.nl, ns-ext-01.wur.nl and umcdns03.azn.nl.

Host names with two IP numbers: ns1.surfnet.nl points to 2001:610:1:800a:192:87:106:101 and 192.87.106.101; ns2.surfnet.nl points to 2001:610:3:200a:192:87:36:2 and 192.87.36.2; ns3.surfnet.nl points to 2001:610:0:800c:195:169:124:71 and 195.169.124.71; ns1.zurich.surf.net points to 2001:620:0:9::1103 and 195.176.255.9.

Mail Servers

sec.nl is served by two mail servers mx10.surfmailfilter.nl and mx11.surfmailfilter.nl.

sec.nl shares the same mail server setup as other domains, for instance netherlandsvaccineinstitute.com, staatvenz.nl, staatvolksgezondheidzorg.nl, rivmjaarverslag.nl and fwn.rug.nl.

sec.nl shares at least some mail servers with other domains, for example biosecurityselfscan.nl, biosecurityzelfscan.nl, netherlandsvaccineinstitute.nl, nrgcae.nl and eduroam.nl.

Host names with two IPs:

mx10.surfmailfilter.nl points to 2001:610:188:173:192:87:106:168 and 192.87.106.168

mx11.surfmailfilter.nl points to 2001:610:1:40ab:195:169:13:8 and 195.169.13.8