`btnholding.com`

DNSSEC	⚠️ Not signed
A	185.40.255.126^{🇳🇱 NGNETWORKS185.40.252.0/22 De Ruiter Network Company B.V.}
		PTR	`cobra.webvanced.nl`
NS	`ns1.openprovider.nl` ⭐
		A	2400:cb00:2049:1::a29f:1a0a^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	162.159.26.10^{Cloudflare162.159.26.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns2.openprovider.be`
		A	2400:cb00:2049:1::a29f:1b60^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	162.159.27.96^{Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns3.openprovider.eu`
		A	2400:cb00:2049:1::a29f:3059^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	162.159.48.89^{Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
MX	`btnholding-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::1^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00401.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::5^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db3pr0202cu00205.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::9^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00601.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::5^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am1pr04cu00105.inbound.protection.outlook.com`
		A	52.101.68.0^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db3pr0202cu00100.inbound.protection.outlook.com`
		A	52.101.68.18^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db4pr02cu00302.inbound.protection.outlook.com`
		A	52.101.73.11^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am1pr04cu00103.inbound.protection.outlook.com`
		A	52.101.73.15^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am9pr04cu00107.inbound.protection.outlook.com`
TXT	`MS=ms54503328`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns1.openprovider.nl`dns@openprovider.eu 2024-07-03 #1

`com`

	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.net`nstld@verisign-grs.com serial=1775984962

Subdomains

mail.btnholding.com

Same first word

btnholding.com

DNS History

16 records (5 active, 11 former)

●NSns1.openprovider.nl2026-04-11 → 2026-04-12 · 3 obs

○ 2017-07-04 12:42:32
● 2026-04-11 10:24:30
● 2026-04-12 09:38:52

○NSns1.webvanced.nl2015-06-25 → 2017-07-04 · 4 obs

● 2015-06-25 00:07:52
● 2017-07-04 12:42:32
○ 2026-04-11 10:24:30
○ 2026-04-12 09:38:52

●NSns2.openprovider.be2026-04-11 → 2026-04-12 · 3 obs

○ 2017-07-04 12:42:32
● 2026-04-11 10:24:30
● 2026-04-12 09:38:52

○NSns2.webvanced.nl2015-06-25 → 2017-07-04 · 4 obs

● 2015-06-25 00:07:52
● 2017-07-04 12:42:32
○ 2026-04-11 10:24:30
○ 2026-04-12 09:38:52

●NSns3.openprovider.eu2026-04-11 → 2026-04-12 · 3 obs

○ 2017-07-04 12:42:32
● 2026-04-11 10:24:30
● 2026-04-12 09:38:52

○NSns3.webvanced.org2016-07-20 → 2017-07-04 · 5 obs

○ 2015-06-25 00:07:52
● 2016-07-20 05:31:04
● 2017-07-04 12:42:32
○ 2026-04-11 10:24:30
○ 2026-04-12 09:38:52

○MXalt1.aspmx.l.google.com2015-06-25 → 2017-07-04 · 4 obs

● 2015-06-25 00:07:52
● 2017-07-04 12:42:32
○ 2026-04-11 10:24:30
○ 2026-04-12 09:38:52

○MXalt2.aspmx.l.google.com2015-06-25 → 2017-07-04 · 4 obs

● 2015-06-25 00:07:52
● 2017-07-04 12:42:32
○ 2026-04-11 10:24:30
○ 2026-04-12 09:38:52

○MXaspmx.l.google.com2015-06-25 → 2017-07-04 · 4 obs

● 2015-06-25 00:07:52
● 2017-07-04 12:42:32
○ 2026-04-11 10:24:30
○ 2026-04-12 09:38:52

○MXaspmx2.googlemail.com2015-06-25 → 2017-07-04 · 4 obs

● 2015-06-25 00:07:52
● 2017-07-04 12:42:32
○ 2026-04-11 10:24:30
○ 2026-04-12 09:38:52

○MXaspmx3.googlemail.com2015-06-25 → 2017-07-04 · 4 obs

● 2015-06-25 00:07:52
● 2017-07-04 12:42:32
○ 2026-04-11 10:24:30
○ 2026-04-12 09:38:52

○MXaspmx4.googlemail.com2015-06-25 → 2017-07-04 · 4 obs

● 2015-06-25 00:07:52
● 2017-07-04 12:42:32
○ 2026-04-11 10:24:30
○ 2026-04-12 09:38:52

○MXaspmx5.googlemail.com2015-06-25 → 2017-07-04 · 4 obs

● 2015-06-25 00:07:52
● 2017-07-04 12:42:32
○ 2026-04-11 10:24:30
○ 2026-04-12 09:38:52

●MXbtnholding-com.mail.protection.outlook.com2026-04-11 → 2026-04-12 · 3 obs

○ 2017-07-04 12:42:32
● 2026-04-11 10:24:30
● 2026-04-12 09:38:52

●A185.40.255.1262026-04-11 → 2026-04-12 · 3 obs

○ 2017-07-04 12:42:32
● 2026-04-11 10:24:30
● 2026-04-12 09:38:52

○A217.195.120.1622015-06-25 → 2017-07-04 · 4 obs

● 2015-06-25 00:07:52
● 2017-07-04 12:42:32
○ 2026-04-11 10:24:30
○ 2026-04-12 09:38:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net...	-
btnholding.com	ns1.openprovider.nl, ns3.openprovider.eu, ns2.openprovider.be	-

✅ Authoritative Response

Server:162.159.26.10

NS records: ns1.openprovider.nl, ns3.openprovider.eu, ns2.openprovider.be

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for btnholding.com (unsigned zone)

⏱️ Timing

Total: 635ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`185.40.255.126`
NS	3	`ns3.openprovider.eu, ns2.openprovider.be...`
MX	1	`btnholding-com.mail.protection.outlook.c`
TXT	2	`v=spf1 include:spf.protection.outlook.co, MS=ms54503328`
SOA	1	`ns1.openprovider.nl dns.openprovider.eu`

Analysis

Hierarchy

The parent of mail.btnholding.com is btnholding.com.

IP Addresses

btnholding.com points to an IP address: 185.40.255.126.

other host names include cryoworld.nl, stratandgo.nl, donghua.es, vintis.nl and souverein.be; they share IP numbers with btnholding.com.

Name Servers

btnholding.com is delegated to three name servers ns2.openprovider.be, ns3.openprovider.eu and ns1.openprovider.nl.

btnholding.com at least partially shares name servers with other domains, for instance family-radio.net, zeit.be, balance-travel.nl, lebavard.com and silverfox.nl.

Host names with two IP numbers:

ns2.openprovider.be points to 2400:cb00:2049:1::a29f:1b60 and 162.159.27.96; ns3.openprovider.eu points to 2400:cb00:2049:1::a29f:3059 and 162.159.48.89; ns1.openprovider.nl points to 2400:cb00:2049:1::a29f:1a0a and 162.159.26.10.

Mail Servers

btnholding.com is handled by a single mail server, btnholding-com.mail.protection.outlook.com.

Hostname btnholding-com.mail.protection.outlook.com resolves to eight IP numbers: 2a01:111:f403:ca04::1, 2a01:111:f403:ca04::5, 2a01:111:f403:ca04::9, 2a01:111:f403:ca09::5, 52.101.68.0, 52.101.68.18, 52.101.73.11 and 52.101.73.15.

btnholding.com - robtex.com

btnholding.com

com

Subdomains

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`btnholding.com`

`com`