coefficient.fr - dns.ninja

`coefficient.fr`

DNSSEC	⚠️ Not signed
A	15.188.177.233^{🇫🇷 Amazon15.188.0.0/16 EC2 CDG prefix}
		PTR	`ec2-15-188-177-233.eu-west-3.compute.amazonaws.com`
NS	`nsa.perf1.fr` ⭐
		A	2a01:c8:100::100^{🇫🇷 NAMESHIELD2a01:c8:100::/40 ANYCAST1-1}
			PTR	`nsa.perf1.fr`
		A	81.92.94.100^{🇫🇷 NAMESHIELD81.92.94.0/23 ANYCAST1-1}
			PTR	`nsa.perf1.fr`
NS	`nsb.perf1.com`
		A	2a01:c8:101::100^{🇫🇷 NAMESHIELD2a01:c8:100::/40 ANYCAST1-1}
			PTR	`nsb.perf1.com`
		A	81.92.95.100^{🇫🇷 NAMESHIELD81.92.94.0/23 ANYCAST1-1}
			PTR	`nsb.perf1.com`
NS	`nsc.perf1.com`
		A	2a09:35c0:102::100^{🇫🇷 NAMESHIELDGRP2a09:35c0:100::/40 NAMESHIELD ANYCAST1-2}
			PTR	`nsc.perf1.com`
		A	152.89.172.100^{🇫🇷 NAMESHIELDGRP152.89.172.0/23 NAMESHIELD ANYCAST1-2}
			PTR	`nsc.perf1.com`
MX	`coefficient-fr.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db3pr0202cu00100.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::8^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db5pr02cu00100.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::f^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00507.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::5^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am1pr04cu00105.inbound.protection.outlook.com`
		A	52.101.73.1^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am3pr04cu00501.inbound.protection.outlook.com`
		A	52.101.73.2^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as9pr07cu00302.inbound.protection.outlook.com`
		A	52.101.73.8^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am0pr04cu00500.inbound.protection.outlook.com`
		A	52.101.73.22^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am7pr05cu00106.inbound.protection.outlook.com`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
TXT	`67xs(0x356578)h65962rycda377qcz28`
TXT	`apple-domain-verification=DfasJUa39J0YhAV3`
TXT	`MS=ms14983201`
SOA	`nsa.perf1.fr`technical@nameshield.net 2026-06-19 #11

`fr`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.nic.fr` ⭐
	NS	`d.nic.fr`
	NS	`f.ext.nic.fr`
	NS	`g.ext.nic.fr`
	TXT	`18 RRs processed [18/07/2026 01H41:31]`
	SOA	`a.nic.fr`dnsmaster@afnic.fr serial=2245801968

Same first word

Similar names

efficientco.com

tecnioffice.com

tecnioffice.es

intecoffice.co.uk

ecofficient.org

DNS History

10 records (5 active, 5 former)

○NSns1.lerelaisinternet.com2015-07-09 → 2018-11-20 · 4 obs

● 2015-07-09 23:40:50
● 2018-11-20 19:14:44
○ 2026-03-19 21:11:42
○ 2026-07-18 02:13:54

○NSns2.lerelaisinternet.com2015-07-09 → 2018-11-20 · 4 obs

● 2015-07-09 23:40:50
● 2018-11-20 19:14:44
○ 2026-03-19 21:11:42
○ 2026-07-18 02:13:54

●NSnsa.perf1.fr2026-03-19 → 2026-07-18 · 3 obs

○ 2018-11-20 19:14:44
● 2026-03-19 21:11:42
● 2026-07-18 02:13:54

●NSnsb.perf1.com2026-03-19 → 2026-07-18 · 3 obs

○ 2018-11-20 19:14:44
● 2026-03-19 21:11:42
● 2026-07-18 02:13:54

●NSnsc.perf1.com2026-03-19 → 2026-07-18 · 3 obs

○ 2018-11-20 19:14:44
● 2026-03-19 21:11:42
● 2026-07-18 02:13:54

●MXcoefficient-fr.mail.protection.outlook.com2018-11-20 → 2026-07-18 · 3 obs

○ 2017-02-05 08:52:40
● 2018-11-20 19:14:44
● 2026-07-18 02:13:54

○MXsmtp1.lerelaisinternet.com2015-07-09 → 2017-02-05 · 4 obs

● 2015-07-09 23:40:50
● 2017-02-05 08:52:40
○ 2018-11-20 19:14:44
○ 2026-07-18 02:13:54

○MXsmtp2.lerelaisinternet.com2015-07-09 → 2017-02-05 · 4 obs

● 2015-07-09 23:40:50
● 2017-02-05 08:52:40
○ 2018-11-20 19:14:44
○ 2026-07-18 02:13:54

●A15.188.177.2332026-03-19 → 2026-07-18 · 3 obs

○ 2018-11-20 19:14:44
● 2026-03-19 21:11:42
● 2026-07-18 02:13:54

○A194.206.126.2042015-07-09 → 2018-11-20 · 4 obs

● 2015-07-09 23:40:50
● 2018-11-20 19:14:44
○ 2026-03-19 21:11:42
○ 2026-07-18 02:13:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
fr	f.ext.nic.fr, d.nic.fr, g.ext.nic.fr	-
coefficient.fr	nsb.perf1.com, nsc.perf1.com, nsa.perf1.fr	2 records

✅ Authoritative Response

Server:81.92.94.100

NS records: nsb.perf1.com, nsc.perf1.com, nsa.perf1.fr

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coefficient.fr (unsigned zone)

⏱️ Timing

Total: 1153ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`15.188.177.233`
NS	3	`nsb.perf1.com, nsc.perf1.com...`
MX	1	`coefficient-fr.mail.protection.outlook.c`
TXT	4	`v=spf1 include:spf.protection.outlook.co, 67xs(0x356578)h65962rycda377qcz28...`
SOA	1	`nsa.perf1.fr technical.nameshield.net`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (nsa.perf1.fr, nsa.perf1.fr)

Analysis

IP Addresses

coefficient.fr resolves to one IP address: 15.188.177.233.

ec2-15-188-177-233.eu-west-3.compute.amazonaws.com, leon-noel.com, lescompagnonsdesaintjacques.com and two other host names share IP numbers with coefficient.fr.

Name Servers

DNS for coefficient.fr is handled by three authoritative name servers: nsb.perf1.com, nsc.perf1.com and nsa.perf1.fr.

coefficient.fr shares at least some of its name servers with other domains, including rigips.sk, toxlab.fr, arcelor.no and two others.

These name servers are frequently seen alongside a.ns.developpement-durable.gouv.fr, b.ns.developpement-durable.gouv.fr, ns0.infravesi.com and 7 other name servers.

Three hostnames — nsb.perf1.com, nsc.perf1.com and nsa.perf1.fr — each have two IP addresses: nsb.perf1.com has 81.92.95.100 and 2a01:c8:101::100, nsc.perf1.com has 152.89.172.100 and 2a09:35c0:102::100, and nsa.perf1.fr has 81.92.94.100 and 2a01:c8:100::100.

Mail Servers

Mail for coefficient.fr is handled by a single mail server, coefficient-fr.mail.protection.outlook.com.

coefficient-fr.mail.protection.outlook.com resolves to 8 IP addresses — 52.101.73.1, 52.101.73.2, 52.101.73.8 and 5 others.