firstline.dk - robtex.com

firstline.dk

DNSSEC🔒 Signed (DS record present)
A94.231.103.100🇩🇰 team-blue-denmark94.231.96.0/20 ZITCOM A/S
PTRdnsforward.simply.com
NSns1.simply.com ⭐
A2a02:2339:1:15c::4562:4562🇩🇰 team-blue-denmark2a02:2339::/36
PTRns1.simply.com
A91.197.248.78🇩🇰 team-blue-denmark91.197.248.0/22
PTRns1.simply.com
NSns2.simply.com
A2a02:2339:4006:101::4562:4562🇩🇰 team-blue-denmark2a02:2339:4000::/34
PTRns2.simply.com
A185.25.141.15🇩🇰 team-blue-denmark185.25.141.0/24 Zitcom A/S
PTRns2.simply.com
NSns3.simply.com
A91.197.248.79🇩🇰 team-blue-denmark91.197.248.0/22
PTRns3.simply.com
MXmx.simply.com ⭐
A94.231.106.20🇩🇰 team-blue-denmark94.231.96.0/20 ZITCOM A/S
PTRmx.simply.com
TXTv=spf1 include:spf.simply.com -all
SOAns1.simply.comhostmaster@simply.com 2026-02-15 #0

dk

DNSSEC🔒 Signed (DS record present)
NSb.nic.dk ⭐
NSc.nic.dk
NSh.nic.dk
NSl.nic.dk
NSs.nic.dk
NSt.nic.dk
TXTDK zone updateEpoch 1781610121localtime Tue Jun 16 13:42:01 2026gmtime Tue Ju...
SOAb.nic.dktech@punktum.dk serial=1781610301

Subdomains

mail.firstline.dk

Same first word

firstline.co.uk
firstline.com.kw
firstline.dk
firstline.com.ua
firstline.com
firstline.org
firstline.co
firstline.com.my
firstline.org.il
firstline.ie
firstline.lu
firstline.parts
firstline.com.au
firstline.se
firstline.de
firstline.ca
firstline.co.za
firstline.es
firstline.be
firstline.ws
firstline.cc
firstline.webhop.org
firstline.systems
firstline.net.au
firstline.ltd
firstline.net
firstline.ru
firstline.com.cn
firstline.co.jp
firstline.pl
firstline.eu
firstline.co.nz
firstline.no
firstline.at
firstline.us
firstline.md
firstline.com.tr
firstline.in.ua
firstline.com.sg
firstline.com.ng
firstline.biz
firstline.properties

Similar names

sliterfin.com
linefirst.ru
firstlien.com
linefirst.com
sinfilter.com
firstlein.com
fitliners.de
fitliners.com
insfilter.com

DNS History

13 records (5 active, 8 former)

20162017201820192020202120222023202420252026NSns1.simply.comns2.simply.comns3.simply.comns1.gratisdns.dkns2.gratisdns.dkns3.gratisdns.dkns4.gratisdns.dkns5.gratisdns.dkMXmx.simply.comfirstline-dk.mail.protection.outlook.comA94.231.103.10077.243.131.10577.243.131.18
○NSns1.gratisdns.dk2015-07-02 → 2017-03-22 · 4 obs
● 2015-07-02 00:02:28
● 2017-03-22 19:33:04
○ 2026-06-11 10:06:46
○ 2026-06-16 11:50:04
●NSns1.simply.com2026-06-11 → 2026-06-16 · 3 obs
○ 2017-03-22 19:33:04
● 2026-06-11 10:06:46
● 2026-06-16 11:50:04
○NSns2.gratisdns.dk2015-07-02 → 2017-03-22 · 4 obs
● 2015-07-02 00:02:28
● 2017-03-22 19:33:04
○ 2026-06-11 10:06:46
○ 2026-06-16 11:50:04
●NSns2.simply.com2026-06-11 → 2026-06-16 · 3 obs
○ 2017-03-22 19:33:04
● 2026-06-11 10:06:46
● 2026-06-16 11:50:04
○NSns3.gratisdns.dk2015-07-02 → 2017-03-22 · 4 obs
● 2015-07-02 00:02:28
● 2017-03-22 19:33:04
○ 2026-06-11 10:06:46
○ 2026-06-16 11:50:04
●NSns3.simply.com2026-06-11 → 2026-06-16 · 3 obs
○ 2017-03-22 19:33:04
● 2026-06-11 10:06:46
● 2026-06-16 11:50:04
○NSns4.gratisdns.dk2015-07-02 → 2017-03-22 · 4 obs
● 2015-07-02 00:02:28
● 2017-03-22 19:33:04
○ 2026-06-11 10:06:46
○ 2026-06-16 11:50:04
○NSns5.gratisdns.dk2015-07-02 → 2017-03-22 · 4 obs
● 2015-07-02 00:02:28
● 2017-03-22 19:33:04
○ 2026-06-11 10:06:46
○ 2026-06-16 11:50:04
○MXfirstline-dk.mail.protection.outlook.com2015-07-02 → 2017-03-22 · 4 obs
● 2015-07-02 00:02:28
● 2017-03-22 19:33:04
○ 2026-06-11 10:06:46
○ 2026-06-16 11:50:04
●MXmx.simply.com2026-06-11 → 2026-06-16 · 3 obs
○ 2017-03-22 19:33:04
● 2026-06-11 10:06:46
● 2026-06-16 11:50:04
○A77.243.131.1052016-02-04 → 2017-03-22 · 5 obs
○ 2015-11-13 16:08:32
● 2016-02-04 07:18:30
● 2017-03-22 19:33:04
○ 2026-06-11 10:06:46
○ 2026-06-16 11:50:04
○A77.243.131.182015-07-02 → 2015-11-13 · 4 obs
● 2015-07-02 00:02:28
● 2015-11-13 16:08:32
○ 2016-02-04 07:18:30
○ 2026-06-16 11:50:04
●A94.231.103.1002026-06-11 → 2026-06-16 · 3 obs
○ 2017-03-22 19:33:04
● 2026-06-11 10:06:46
● 2026-06-16 11:50:04

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
dkb.nic.dk, c.nic.dk, h.nic.dk, l.nic.dk...-
firstline.dkns3.simply.com, ns2.simply.com, ns1.simply.com-

✅ Authoritative Response

Server:91.197.248.78

NS records: ns3.simply.com, ns2.simply.com, ns1.simply.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 957ms | Queries: -

📄 Records

TypeCountSample Data
A194.231.103.100
NS3ns1.simply.com, ns3.simply.com...
MX1mx.simply.com (pri: 10)
TXT1v=spf1 include:spf.simply.com -all
SOA1ns1.simply.com hostmaster.simply.com

Analysis

Hierarchy

firstline.dk is a parent domain of mail.firstline.dk.

IP Addresses

firstline.dk has exactly one IP address — 94.231.103.100.

naviconsulting.dk, staudal.dk, arvedsen.dk plus two other host names have IP numbers in common with firstline.dk.

Name Servers

firstline.dk carries NS records delegating to ns1.simply.com, ns2.simply.com and ns3.simply.com.

firstline.dk shares at least some of its name servers with other domains, including improvability.dk, snora.dk, mtbs.dk and two others.

These name servers are frequently seen alongside the name servers ns4.simply.com.

Host names pointing to two IP addresses:

ns1.simply.com resolves to two addresses: 91.197.248.78 and 2a02:2339:1:15c::4562:4562.

ns2.simply.com resolves to two addresses: 185.25.141.15 and 2a02:2339:4006:101::4562:4562.

Host names resolving to a single IP address:

The hostname ns3.simply.com resolves to 91.197.248.79.

Mail Servers

firstline.dk uses one mail server — mx.simply.com.

The mail server setup of firstline.dk matches that of other domains such as eastoak.net, novium.se, kobborg.eu and two others.

firstline.dk shares at least some of its mail servers with other domains, such as konvex.dk.

mx.simply.com carries a single IP number, which is 94.231.106.20.