backtocore.nl - robtex.com

backtocore.nl

DNSSEC⚠️ Not signed
A37.34.63.134🇳🇱 TRANSIP-AS37.34.56.0/21 TransIP BV Amsterdam, The Netherlands
PTRgert.avant.nl
NSns1.avant-int.nl ⭐
A2a01:7c8:aac8:562::73🇳🇱 TRANSIP-AS2a01:7c8::/32 TransIP B.V. Amsterdam IPv6 network
PTRns1.avant-int.nl
A188.241.149.73🇳🇱 TRANSIP-AS188.241.148.0/22 TransIP B.V.
PTRns1.avant-int.nl
NSns2.avant-int.nl
A2a01:7c8:d007:3d3::205🇳🇱 TRANSIP-AS2a01:7c8::/32 TransIP B.V. Amsterdam IPv6 network
PTRns2.avant-int.nl
A85.10.135.205🇳🇱 TRANSIP-AS85.10.128.0/19 TransIP BV Amsterdam, The Netherlands
PTRns2.avant-int.nl
MXfilter1.idefender.nl ⭐
A185.158.202.32🇳🇱 PREVIDER-AS185.158.200.0/22
PTRfilter01.idefender.nl
MXfilter2.idefender.nl ⭐
A185.158.202.33🇳🇱 PREVIDER-AS185.158.200.0/22
PTRfilter02.idefender.nl
TXTv=spf1 include:spf.protection.outlook.com include:_spf.idefender.nl ip4:37.34...
SOAns1.avant-int.nlhostmaster@avant.nl 2021-04-01 #1

nl

DNSSEC🔒 Signed (DS record present)
NSns1.dns.nl ⭐
NSns3.dns.nl
NSns4.dns.nl
TXTnl zone update: 2026-03-27 05:00:02 +0000 (EPOCH 1774587602)
SOAns1.dns.nldns@sidn.nl 2026-03-27 #10

Previously MX for

backtocore.nl

Same first word

backtocore.nl

DNS History

19 records (5 active, 14 former)

20162017201820192020202120222023202420252026NSns1.avant-int.nlns2.avant-int.nlns0.transip.nlns1.nedlinuxsec.nlns1.transip.netns2.nedlinuxsec.nlns2.transip.euns3.nedlinuxsec.nlMXfilter1.idefender.nlfilter2.idefender.nlbacktocore.nlfilter1.ibarracuda.nlfilter2.ibarracuda.nlmx1.nedlinux.commx2.nedlinux.comA37.34.63.134194.109.193.752001:888:2000:a::7537.128.144.171
○NSns0.transip.nl2016-02-09 → 2017-01-25 · 5 obs
○ 2015-11-11 19:38:48
● 2016-02-09 16:57:14
● 2017-01-25 18:55:22
○ 2020-01-05 14:53:56
○ 2026-03-27 05:44:20
●NSns1.avant-int.nl2020-01-05 → 2026-03-27 · 3 obs
○ 2017-01-25 18:55:22
● 2020-01-05 14:53:56
● 2026-03-27 05:44:20
○NSns1.nedlinuxsec.nl2015-06-30 → 2015-11-11 · 4 obs
● 2015-06-30 21:16:48
● 2015-11-11 19:38:48
○ 2016-02-09 16:57:14
○ 2026-03-27 05:44:20
○NSns1.transip.net2016-02-09 → 2017-01-25 · 5 obs
○ 2015-11-11 19:38:48
● 2016-02-09 16:57:14
● 2017-01-25 18:55:22
○ 2020-01-05 14:53:56
○ 2026-03-27 05:44:20
●NSns2.avant-int.nl2020-01-05 → 2026-03-27 · 3 obs
○ 2017-01-25 18:55:22
● 2020-01-05 14:53:56
● 2026-03-27 05:44:20
○NSns2.nedlinuxsec.nl2015-06-30 → 2015-11-11 · 4 obs
● 2015-06-30 21:16:48
● 2015-11-11 19:38:48
○ 2016-02-09 16:57:14
○ 2026-03-27 05:44:20
○NSns2.transip.eu2016-02-09 → 2017-01-25 · 5 obs
○ 2015-11-11 19:38:48
● 2016-02-09 16:57:14
● 2017-01-25 18:55:22
○ 2020-01-05 14:53:56
○ 2026-03-27 05:44:20
○NSns3.nedlinuxsec.nl2015-06-30 → 2015-11-11 · 4 obs
● 2015-06-30 21:16:48
● 2015-11-11 19:38:48
○ 2016-02-09 16:57:14
○ 2026-03-27 05:44:20
○MXbacktocore.nl2016-02-09 → 2016-02-09 · 4 obs
○ 2015-11-11 19:38:48
● 2016-02-09 16:57:14
○ 2016-06-18 16:21:38
○ 2026-03-27 05:44:20
○MXfilter1.ibarracuda.nl2016-06-18 → 2020-01-05 · 5 obs
○ 2016-02-09 16:57:14
● 2016-06-18 16:21:38
● 2020-01-05 14:53:56
○ 2026-03-11 09:29:08
○ 2026-03-27 05:44:20
●MXfilter1.idefender.nl2026-03-11 → 2026-03-27 · 3 obs
○ 2020-01-05 14:53:56
● 2026-03-11 09:29:08
● 2026-03-27 05:44:20
○MXfilter2.ibarracuda.nl2016-06-18 → 2020-01-05 · 5 obs
○ 2016-02-09 16:57:14
● 2016-06-18 16:21:38
● 2020-01-05 14:53:56
○ 2026-03-11 09:29:08
○ 2026-03-27 05:44:20
●MXfilter2.idefender.nl2026-03-11 → 2026-03-27 · 3 obs
○ 2020-01-05 14:53:56
● 2026-03-11 09:29:08
● 2026-03-27 05:44:20
○MXmx1.nedlinux.com2015-06-30 → 2015-11-11 · 4 obs
● 2015-06-30 21:16:48
● 2015-11-11 19:38:48
○ 2016-02-09 16:57:14
○ 2026-03-27 05:44:20
○MXmx2.nedlinux.com2015-06-30 → 2015-11-11 · 4 obs
● 2015-06-30 21:16:48
● 2015-11-11 19:38:48
○ 2016-02-09 16:57:14
○ 2026-03-27 05:44:20
○A194.109.193.752015-06-30 → 2015-11-11 · 4 obs
● 2015-06-30 21:16:48
● 2015-11-11 19:38:48
○ 2016-02-09 16:57:14
○ 2026-03-27 05:44:20
○A2001:888:2000:a::752015-06-30 → 2015-11-11 · 4 obs
● 2015-06-30 21:16:48
● 2015-11-11 19:38:48
○ 2016-02-09 16:57:14
○ 2026-03-27 05:44:20
○A37.128.144.1712016-02-09 → 2017-01-25 · 5 obs
○ 2015-11-11 19:38:48
● 2016-02-09 16:57:14
● 2017-01-25 18:55:22
○ 2020-01-05 14:53:56
○ 2026-03-27 05:44:20
●A37.34.63.1342020-01-05 → 2026-03-27 · 3 obs
○ 2017-01-25 18:55:22
● 2020-01-05 14:53:56
● 2026-03-27 05:44:20

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
nlns1.dns.nl, ns3.dns.nl, ns4.dns.nl-
backtocore.nlns1.avant-int.nl, ns2.avant-int.nl4 records

✅ Authoritative Response

Server:188.241.149.73

NS records: ns1.avant-int.nl, ns2.avant-int.nl

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for backtocore.nl (unsigned zone)

⏱️ Timing

Total: 349ms | Queries: -

📄 Records

TypeCountSample Data
A137.34.63.134
NS2ns1.avant-int.nl, ns2.avant-int.nl
MX2filter2.idefender.nl (pri: 10), filter1.idefender.nl (pri: 10)
TXT1v=spf1 include:spf.protection.outlook.co
SOA1ns1.avant-int.nl hostmaster.avant.nl

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns1.avant-int.nl, ns1.avant-int.nl, ns2.avant-int.nl...)

Analysis

IP Addresses

backtocore.nl resolves to one IP number: 37.34.63.134.

other host names including vanaart.nl, manegeelzenhof.nl, microwatersnijden.nl, ljteunissen.nl and 37-34-63-134.colo.transip.net share IP numbers with backtocore.nl.

Name Servers

backtocore.nl is delegated to two name servers ns1.avant-int.nl and ns2.avant-int.nl.

backtocore.nl shares the same name server setup as other domains, for instance vrachtwagenreklame.com, gebben.com, winkelcentrumwilgendonk.nl, safety-outlet.eu and corardesch.nl.

Host names with two IP numbers:

The host name ns1.avant-int.nl points to 2a01:7c8:aac8:562::73 and 188.241.149.73; the host name ns2.avant-int.nl points to 2a01:7c8:d007:3d3::205 and 85.10.135.205.

Mail Servers

Two mail servers handle backtocore.nl: filter1.idefender.nl and filter2.idefender.nl.

backtocore.nl shares the same mail server setup as other domains, for instance ecompany.nl, oceannet.nl, doornenbal.com, companies-house.eu and prangsma.nl.

backtocore.nl shares some mail servers with other domains, at least partially, for instance mondial-movers.nl, kartonnenkoker.nl, tankmatchrail.de, prinsauto.nl and nestrx.nl.

Host names with one IP number:

filter1.idefender.nl points to 185.158.202.32

filter2.idefender.nl points to 185.158.202.33