`cours-de-math.fr`

DNSSEC	⚠️ Not signed
A	165.160.13.20^{🇺🇸 CORPORATION-1165.160.13.0/24 251 Little Falls Drive Wilmington DE 19808 United States}
A	165.160.15.20^{🇺🇸 CORPORATION-1165.160.15.0/24 251 Little Falls Drive Wilmington DE 19808 United States}
NS	`dns1.cscdns.net` ⭐
		A	2610:a1:1022::100^{🇺🇸 MAINT-ID-120082610:a1:1022::/48 Neustar}
			PTR	`ns1.arcemus.com`
			PTR	`kandns06.digitalarchives.com`
			PTR	`ns1.euro909.com`
			PTR	`ns2.euro909.com`
			PTR	`indom10.indomco.com`
			PTR	`indom30.indomco.fr`
			PTR	`ns1.ascio.net`
			PTR	`ns3.ascio.net`
			PTR	`dns1.cscdns.net`
			PTR	`pdns1.cscdns.net`
			PTR	`sbdns3.cscdns.net`
			PTR	`spdns3.cscdns.net`
			PTR	`ns0.netnames.net`
			PTR	`ns1.netnames.net`
			PTR	`ns3.netnames.net`
			PTR	`ns5.netnames.net`
			PTR	`ns7.netnames.net`
			PTR	`indom130.indomco.org`
			PTR	`ns2.domainnetwork.se`
			PTR	`ns.domainnetwork.se`
		A	156.154.130.100^{🇺🇸 MAINT-ID-12008156.154.130.0/24 Neustar}
			PTR	`ns1.arcemus.com`
			PTR	`kandns06.digitalarchives.com`
			PTR	`ns1.euro909.com`
			PTR	`ns2.euro909.com`
			PTR	`indom10.indomco.com`
			PTR	`indom30.indomco.fr`
			PTR	`ns1.ascio.net`
			PTR	`ns3.ascio.net`
			PTR	`dns1.cscdns.net`
			PTR	`pdns1.cscdns.net`
			PTR	`sbdns3.cscdns.net`
			PTR	`spdns3.cscdns.net`
			PTR	`ns0.netnames.net`
			PTR	`ns1.netnames.net`
			PTR	`ns3.netnames.net`
			PTR	`ns5.netnames.net`
			PTR	`ns7.netnames.net`
			PTR	`indom130.indomco.org`
			PTR	`ns2.domainnetwork.se`
			PTR	`ns.domainnetwork.se`
NS	`dns2.cscdns.net`
		A	2610:a1:1023::100^{🇺🇸 MAINT-ID-120082610:a1:1023::/48 Neustar}
			PTR	`ns2.arcemus.com`
			PTR	`nusdns06.digitalarchives.com`
			PTR	`ns3.domainnetwork.com`
			PTR	`ns3.euro909.com`
			PTR	`indom80.indomco.hk`
			PTR	`ns2.ascio.net`
			PTR	`ns4.ascio.net`
			PTR	`dns2.cscdns.net`
			PTR	`pdns2.cscdns.net`
			PTR	`indom20.indomco.net`
			PTR	`ns2.netnames.net`
			PTR	`ns4.netnames.net`
			PTR	`ns6.netnames.net`
			PTR	`ns8.netnames.net`
		A	156.154.131.100^{🇺🇸 MAINT-ID-12008156.154.131.0/24 Neustar}
			PTR	`ns2.arcemus.com`
			PTR	`nusdns06.digitalarchives.com`
			PTR	`ns3.domainnetwork.com`
			PTR	`ns3.euro909.com`
			PTR	`indom80.indomco.hk`
			PTR	`ns2.ascio.net`
			PTR	`ns4.ascio.net`
			PTR	`dns2.cscdns.net`
			PTR	`pdns2.cscdns.net`
			PTR	`indom20.indomco.net`
			PTR	`ns2.netnames.net`
			PTR	`ns4.netnames.net`
			PTR	`ns6.netnames.net`
			PTR	`ns8.netnames.net`
TXT	`v=spf1 -all`
SOA	`dns1.cscdns.net`hostmaster@cscdns.net 2025-11-24 #3

`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	`45 RRs processed [14/05/2026 00H20:48]`
	SOA	`a.nic.fr`dnsmaster@afnic.fr serial=2245117899

Same first word

cours-de-math.eu

cours-de-math.fr

DNS History

11 records (4 active, 7 former)

●NSdns1.cscdns.net2026-03-26 → 2026-05-14 · 3 obs

○ 2019-03-28 19:33:42
● 2026-03-26 21:46:26
● 2026-05-14 00:43:40

●NSdns2.cscdns.net2026-03-26 → 2026-05-14 · 3 obs

○ 2019-03-28 19:33:42
● 2026-03-26 21:46:26
● 2026-05-14 00:43:40

○NSindom10.indomco.com2015-08-23 → 2019-03-28 · 4 obs

● 2015-08-23 14:44:24
● 2019-03-28 19:33:42
○ 2026-03-26 21:46:26
○ 2026-05-14 00:43:40

○NSindom130.indomco.org2015-08-23 → 2019-03-28 · 4 obs

● 2015-08-23 14:44:24
● 2019-03-28 19:33:42
○ 2026-03-26 21:46:26
○ 2026-05-14 00:43:40

○NSindom20.indomco.net2015-08-23 → 2019-03-28 · 4 obs

● 2015-08-23 14:44:24
● 2019-03-28 19:33:42
○ 2026-03-26 21:46:26
○ 2026-05-14 00:43:40

○NSindom30.indomco.fr2015-08-23 → 2019-03-28 · 4 obs

● 2015-08-23 14:44:24
● 2019-03-28 19:33:42
○ 2026-03-26 21:46:26
○ 2026-05-14 00:43:40

○MXmail.cours-de-math.fr2015-08-23 → 2019-03-28 · 4 obs

● 2015-08-23 14:44:24
● 2019-03-28 19:33:42
○ 2026-03-26 21:46:26
○ 2026-05-14 00:43:40

●A165.160.13.202019-03-28 → 2026-05-14 · 3 obs

○ 2017-01-14 18:41:20
● 2019-03-28 19:33:42
● 2026-05-14 00:43:40

●A165.160.15.202019-03-28 → 2026-05-14 · 3 obs

○ 2017-01-14 18:41:20
● 2019-03-28 19:33:42
● 2026-05-14 00:43:40

○A185.26.230.1292016-04-01 → 2017-01-14 · 5 obs

○ 2016-01-28 22:21:34
● 2016-04-01 02:01:16
● 2017-01-14 18:41:20
○ 2019-03-28 19:33:42
○ 2026-05-14 00:43:40

○A185.26.230.1372015-08-23 → 2016-01-28 · 4 obs

● 2015-08-23 14:44:24
● 2016-01-28 22:21:34
○ 2016-04-01 02:01:16
○ 2026-05-14 00:43:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
fr	d.nic.fr, f.ext.nic.fr, g.ext.nic.fr	-
cours-de-math.fr	dns1.cscdns.net, dns2.cscdns.net	-

✅ Authoritative Response

Server:156.154.131.100

NS records: dns1.cscdns.net, dns2.cscdns.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cours-de-math.fr (unsigned zone)

⏱️ Timing

Total: 1461ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`165.160.13.20, 165.160.15.20`
NS	2	`dns1.cscdns.net, dns2.cscdns.net`
TXT	1	`v=spf1 -all`
SOA	1	`dns1.cscdns.net hostmaster.cscdns.net`

Analysis

IP Addresses

cours-de-math.fr points to two IP numbers: 165.160.13.20 and 165.160.15.20.

Other host names, for instance barclays.ceo, cytivasolutions.com, jumeirahmaldiveshotel.com, technoplast.de and whyihatepellawindows.com share IP numbers with cours-de-math.fr.

Name Servers

Delegation for cours-de-math.fr rests with two name servers, dns1.cscdns.net and dns2.cscdns.net.

cours-de-math.fr shares the same name server setup as other domains, including themastercard.com, wilsonartglobal.com, chipthedog.biz, 1800flowers.ad and seeplaytv.com.

Host names with two IP numbers: dns1.cscdns.net points to 2610:a1:1022::100 and 156.154.130.100; dns2.cscdns.net points to 2610:a1:1023::100 and 156.154.131.100.

cours-de-math.fr - robtex.com

cours-de-math.fr

fr

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

`cours-de-math.fr`

`fr`