`cothink.com`

DNSSEC	⚠️ Not signed
A	136.144.135.159^{🇳🇱 TRANSIP-AS136.144.128.0/17 TransIP BV Amsterdam, The Netherlands}
		PTR	`cloud-03.ropesolutions.nl`
NS	`ns3.combell.net` ⭐
		A	2a00:1c98::53:1^{🇧🇪 COMBELL-AS2a00:1c98::/32 COMBELL Network}
			PTR	`ns3.combell.net`
		A	83.217.73.172^{🇧🇪 COMBELL-AS83.217.64.0/19 Combell Network}
			PTR	`ns3.combell.net`
NS	`ns1.combell.eu` ⚠️ Not in parent delegation
		A	2a00:1c98:50::50^{🇧🇪 COMBELL-AS2a00:1c98:50::/44}
		A	89.44.166.48^{🇧🇪 COMBELL-AS89.44.166.0/23 Combell Network}
			PTR	`89.44.166.48.static.hosted.by.combell-ops.net`
NS	`ns4.combell.net`
		A	2001:1598:0:101::3^{🇧🇪 EASYHOST-COLO-AS2001:1598::/32 Easyhost Network}
			PTR	`ns4.combell.net`
		A	86.39.202.67^{🇧🇪 EASYHOST-COLO-AS86.39.128.0/17 Easyhost Network}
			PTR	`ns4.combell.net`
MX	`cothink-com.mail.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::b^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-dbbpr03cu00103.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::2^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am0pr83cu00402.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::b^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am7pr05cu00103.inbound.protection.outlook.com`
		A	52.101.68.0^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db3pr0202cu00100.inbound.protection.outlook.com`
		A	52.101.73.6^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am6pr04cu00306.inbound.protection.outlook.com`
		A	52.101.73.8^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am0pr04cu00500.inbound.protection.outlook.com`
		A	52.101.73.16^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as2pr05cu00100.inbound.protection.outlook.com`
TXT	`v=spf1 mx a include:spf.protection.outlook.com ip4:136.144.135.159 ip4:195.8....`
TXT	`MS=ms41886934`
SOA	`ns3.combell.net`hostmaster@cothink.com serial=1774001785

`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=1785196627

Same first word

cothink.com

cothink.net

cothink.org

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kontich.be

tonchik.ru

thinkco.com

kichton.biz

kontchi.com

hkintco.com

chintok.com

kichton.com

tonchik.de

kontich.com

kochint.at

kichton.net

thinkco.com.mx

kichton.org

thinkoc.org

hickton.co.nz

thinkco.dev

hictkon.com

hintock.com

kitchon.net

hickton.net

hotnick.com

kotchin.com

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hickton.co.uk

hickton.com

kochint.com

DNS History

15 records (5 active, 10 former)

●NSns1.combell.eu2026-06-03 → 2026-07-28 · 3 obs

○ 2018-06-19 17:31:18
● 2026-06-03 16:07:08
● 2026-07-28 00:16:38

○NSns1.uniserver.nl2015-06-28 → 2016-04-25 · 4 obs

● 2015-06-28 07:08:36
● 2016-04-25 23:35:36
○ 2017-01-01 09:37:36
○ 2026-07-28 00:16:38

○NSns2.uniserver.nl2015-06-28 → 2016-04-25 · 4 obs

● 2015-06-28 07:08:36
● 2016-04-25 23:35:36
○ 2017-01-01 09:37:36
○ 2026-07-28 00:16:38

●NSns3.combell.net2026-06-03 → 2026-07-28 · 3 obs

○ 2018-06-19 17:31:18
● 2026-06-03 16:07:08
● 2026-07-28 00:16:38

○NSns3.uniserver.nl2015-06-28 → 2016-04-25 · 4 obs

● 2015-06-28 07:08:36
● 2016-04-25 23:35:36
○ 2017-01-01 09:37:36
○ 2026-07-28 00:16:38

●NSns4.combell.net2026-06-03 → 2026-07-28 · 3 obs

○ 2018-06-19 17:31:18
● 2026-06-03 16:07:08
● 2026-07-28 00:16:38

○NSnsa.byte.nl2017-01-01 → 2018-06-19 · 5 obs

○ 2016-04-25 23:35:36
● 2017-01-01 09:37:36
● 2018-06-19 17:31:18
○ 2026-06-03 16:07:08
○ 2026-07-28 00:16:38

○NSnsb.byte.nl2017-01-01 → 2018-06-19 · 5 obs

○ 2016-04-25 23:35:36
● 2017-01-01 09:37:36
● 2018-06-19 17:31:18
○ 2026-06-03 16:07:08
○ 2026-07-28 00:16:38

○NSnsc.byte.nl2017-01-01 → 2018-06-19 · 5 obs

○ 2016-04-25 23:35:36
● 2017-01-01 09:37:36
● 2018-06-19 17:31:18
○ 2026-06-03 16:07:08
○ 2026-07-28 00:16:38

●MXcothink-com.mail.protection.outlook.com2026-06-03 → 2026-07-28 · 3 obs

○ 2018-06-19 17:31:18
● 2026-06-03 16:07:08
● 2026-07-28 00:16:38

○MXmail.cothink.com2015-06-28 → 2018-06-19 · 4 obs

● 2015-06-28 07:08:36
● 2018-06-19 17:31:18
○ 2026-06-03 16:07:08
○ 2026-07-28 00:16:38

●A136.144.135.1592026-06-03 → 2026-07-28 · 3 obs

○ 2018-06-19 17:31:18
● 2026-06-03 16:07:08
● 2026-07-28 00:16:38

○A141.105.123.1482018-06-19 → 2018-06-19 · 4 obs

○ 2017-01-01 09:37:36
● 2018-06-19 17:31:18
○ 2026-06-03 16:07:08
○ 2026-07-28 00:16:38

○A77.245.91.2092016-01-27 → 2017-01-01 · 5 obs

○ 2015-11-10 01:09:40
● 2016-01-27 22:45:40
● 2017-01-01 09:37:36
○ 2018-06-19 17:31:18
○ 2026-07-28 00:16:38

○A84.38.229.2402015-06-28 → 2015-11-10 · 4 obs

● 2015-06-28 07:08:36
● 2015-11-10 01:09:40
○ 2016-01-27 22:45:40
○ 2026-07-28 00:16:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
cothink.com	ns3.combell.net, ns4.combell.net	-

✅ Authoritative Response

Server:86.39.202.67

NS records: ns3.combell.net, ns4.combell.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cothink.com (unsigned zone)

⏱️ Timing

Total: 412ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`136.144.135.159`
NS	3	`ns1.combell.eu, ns3.combell.net...`
MX	1	`cothink-com.mail.protection.outlook.com`
TXT	2	`v=spf1 mx a include:spf.protection.outlo, MS=ms41886934`
SOA	1	`ns3.combell.net hostmaster.cothink.com`

Analysis

IP Addresses

cothink.com points to a single IP number: 136.144.135.159.

Additional host names — mail.vandijkgroothandel.nl, cloud-03.ropesolutions.nl, florado.nl and two others — share IP numbers with cothink.com.

Name Servers

Three name servers are authoritative for cothink.com: ns1.combell.eu, ns3.combell.net and ns4.combell.net.

cothink.com has at least partial name server overlap with other domains, such as stockcity.be, new-embryo.be, helioscreen.info and two others.

These name servers tend to appear together with the name servers ns3.european-server.com, ns4.european-server.com and ns1.european-server.eu.

ns1.combell.eu resolves to 89.44.166.48 and 2a00:1c98:50::50. ns3.combell.net resolves to 83.217.73.172 and 2a00:1c98::53:1. ns4.combell.net resolves to 86.39.202.67 and 2001:1598:0:101::3. All three hostnames point to two IP numbers each.

Mail Servers

cothink.com has one mail server: cothink-com.mail.protection.outlook.com.

cothink-com.mail.protection.outlook.com points to 8 IP numbers: 52.101.68.0, 52.101.73.6, 52.101.73.8 and 5 other.

cothink.com - robtex.com

cothink.com

com

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`cothink.com`

`com`