coefficient.nl - dns.ninja

`coefficient.nl`

DNSSEC	⚠️ Not signed
A	91.230.51.51^{🇳🇱 CASE-ELECTRONICS91.230.51.0/24 Case Electronics B.V.}
		PTR	`da6.case-internet.nl`
NS	`ns1.case-internet.nl` ⭐
		A	91.230.51.34^{🇳🇱 CASE-ELECTRONICS91.230.51.0/24 Case Electronics B.V.}
			PTR	`ns1.case-internet.nl`
NS	`ns2.case-internet.nl`
		A	194.122.23.246^{🇳🇱 KPN194.122.0.0/18 B.V.}
			PTR	`ns2.case-internet.nl`
MX	`coefficient-nl.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::6^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db4pr02cu00406.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::e^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db8pr02cu00106.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::1^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as9pr07cu00301.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::b^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am7pr05cu00103.inbound.protection.outlook.com`
		A	52.101.68.39^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00607.inbound.protection.outlook.com`
		A	52.101.73.12^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am4pr0401cu00104.inbound.protection.outlook.com`
		A	52.101.73.19^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as8pr04cu00803.inbound.protection.outlook.com`
		A	52.101.73.153^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as8pr05cu00401.inbound.protection.outlook.com`
TXT	`MS=ms68719071`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns1.case-internet.nl`hostmaster@coefficient.nl 2023-11-23 #0

`nl`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns1.dns.nl` ⭐
	NS	`ns3.dns.nl`
	NS	`ns4.dns.nl`
	TXT	`nl zone update: 2026-07-17 13:30:01 +0000 (EPOCH 1784295001)`
	SOA	`ns1.dns.nl`dns@sidn.nl 2026-07-17 #27

Same first word

Similar names

efficientco.com

tecnioffice.com

tecnioffice.es

intecoffice.co.uk

ecofficient.org

DNS History

12 records (4 active, 8 former)

○NSns0.transip.net2015-07-19 → 2018-07-14 · 4 obs

● 2015-07-19 23:37:10
● 2018-07-14 19:03:04
○ 2026-03-25 07:57:52
○ 2026-07-17 14:29:22

●NSns1.case-internet.nl2026-03-25 → 2026-07-17 · 3 obs

○ 2018-07-14 19:03:04
● 2026-03-25 07:57:52
● 2026-07-17 14:29:22

○NSns1.transip.nl2015-07-19 → 2018-07-14 · 4 obs

● 2015-07-19 23:37:10
● 2018-07-14 19:03:04
○ 2026-03-25 07:57:52
○ 2026-07-17 14:29:22

●NSns2.case-internet.nl2026-03-25 → 2026-07-17 · 3 obs

○ 2018-07-14 19:03:04
● 2026-03-25 07:57:52
● 2026-07-17 14:29:22

○NSns2.transip.eu2015-07-19 → 2018-07-14 · 4 obs

● 2015-07-19 23:37:10
● 2018-07-14 19:03:04
○ 2026-03-25 07:57:52
○ 2026-07-17 14:29:22

●MXcoefficient-nl.mail.protection.outlook.com2026-03-25 → 2026-07-17 · 3 obs

○ 2018-07-14 19:03:04
● 2026-03-25 07:57:52
● 2026-07-17 14:29:22

○MXmail.avirtua.nl2015-07-19 → 2015-12-25 · 4 obs

● 2015-07-19 23:37:10
● 2015-12-25 23:54:48
○ 2016-05-07 01:15:16
○ 2026-07-17 14:29:22

○MXmail1.avirtua.nl2016-05-07 → 2018-07-14 · 5 obs

○ 2015-12-25 23:54:48
● 2016-05-07 01:15:16
● 2018-07-14 19:03:04
○ 2026-03-25 07:57:52
○ 2026-07-17 14:29:22

○MXmail2.avirtua.nl2015-07-19 → 2018-07-14 · 4 obs

● 2015-07-19 23:37:10
● 2018-07-14 19:03:04
○ 2026-03-25 07:57:52
○ 2026-07-17 14:29:22

○A2a01:7c8:eb:0:95:170:70:1162015-07-19 → 2018-07-14 · 4 obs

● 2015-07-19 23:37:10
● 2018-07-14 19:03:04
○ 2026-03-25 07:57:52
○ 2026-07-17 14:29:22

●A91.230.51.512026-03-25 → 2026-07-17 · 3 obs

○ 2018-07-14 19:03:04
● 2026-03-25 07:57:52
● 2026-07-17 14:29:22

○A95.170.70.1162015-07-19 → 2018-07-14 · 4 obs

● 2015-07-19 23:37:10
● 2018-07-14 19:03:04
○ 2026-03-25 07:57:52
○ 2026-07-17 14:29:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
nl	ns1.dns.nl, ns3.dns.nl, ns4.dns.nl	-
coefficient.nl	ns1.case-internet.nl, ns2.case-internet.nl	2 records

✅ Authoritative Response

Server:91.230.51.34

NS records: ns1.case-internet.nl, ns2.case-internet.nl

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coefficient.nl (unsigned zone)

⏱️ Timing

Total: 316ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`91.230.51.51`
NS	2	`ns1.case-internet.nl, ns2.case-internet.nl`
MX	1	`coefficient-nl.mail.protection.outlook.c`
TXT	2	`MS=ms68719071, v=spf1 include:spf.protection.outlook.co`
SOA	1	`ns1.case-internet.nl hostmaster.coeffici`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.case-internet.nl, ns2.case-internet.nl)

Analysis

IP Addresses

coefficient.nl points to a single IP number: 91.230.51.51.

Additional host names — case.to, mail.da6.case-internet.nl, scanmail.nl and two others — share IP numbers with coefficient.nl.

Name Servers

coefficient.nl is served by two delegated name servers, ns1.case-internet.nl and ns2.case-internet.nl.

coefficient.nl shares its name server setup with other domains, including verspui.de, sqzi.nl, trifleet.co.in and two others.

coefficient.nl partially shares its NS delegation with several other domains, including martijn-maas.nl, inversion.nl, rfaid.com and two others.

ns1.case-internet.nl resolves to 91.230.51.34. ns2.case-internet.nl resolves to 194.122.23.246. Both host names point to a single IP number.

Mail Servers

coefficient.nl has one mail server: coefficient-nl.mail.protection.outlook.com.

coefficient-nl.mail.protection.outlook.com points to 8 IP numbers: 52.101.68.39, 52.101.73.12, 52.101.73.19 and 5 other.