`kosterins.com`

DNSSEC	⚠️ Not signed
NS	`a1-74.akam.net` ⭐
		A	2600:1401:2::4a^{🇺🇸 Akamai2600:1401:2::/48 Technologies}
			PTR	`a1-74.akam.net`
			PTR	`ns1-74.akam.net`
		A	193.108.91.74^{🇳🇱 Akamai193.108.91.0/24 Technologies}
			PTR	`a1-74.akam.net`
			PTR	`ns1-74.akam.net`
NS	`a14-67.akam.net`
		A	2600:1480:1800::43^{🇺🇸 Akamai2600:1480:1800::/48 Technologies}
			PTR	`a14-67.akam.net`
		A	184.26.161.67^{🇺🇸 Akamai184.26.161.0/24 Technologies}
			PTR	`a14-67.akam.net`
NS	`a24-64.akam.net`
		A	2600:1480:9800::40^{🇺🇸 Akamai2600:1480:9800::/48 Technologies}
			PTR	`a24-64.akam.net`
		A	2.16.130.64^{🇳🇱 Akamai2.16.130.0/24 Technologies}
			PTR	`a24-64.akam.net`
NS	`a26-64.akam.net`
		A	2600:1480:b800::40^{🇺🇸 Akamai2600:1480:b800::/48 Technologies}
			PTR	`a26-64.akam.net`
		A	23.74.25.64^{🇺🇸 Akamai23.74.25.0/24 Technologies}
			PTR	`a26-64.akam.net`
NS	`a3-64.akam.net`
		A	2600:1408:1c::40^{🇺🇸 Akamai2600:1408:1c::/48 Technologies}
			PTR	`a3-64.akam.net`
			PTR	`ns7-64.akam.net`
		A	96.7.49.64^{🇺🇸 Akamai96.7.49.0/24 Technologies}
			PTR	`a3-64.akam.net`
			PTR	`ns7-64.akam.net`
NS	`a5-64.akam.net`
		A	2600:1480:b000::40^{🇺🇸 Akamai2600:1480:b000::/48 Technologies}
			PTR	`a5-64.akam.net`
			PTR	`ns6-64.akam.net`
		A	95.100.168.64^{🇳🇱 Akamai95.100.168.0/24 Technologies}
			PTR	`a5-64.akam.net`
			PTR	`ns6-64.akam.net`
MX	`kosterins-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c801::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sa9pr02cu00200.inbound.protection.outlook.com`
		A	2a01:111:f403:c902::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sj2pr05cu00401.inbound.protection.outlook.com`
		A	2a01:111:f403:c902::14^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-byapr04cu00204.inbound.protection.outlook.com`
		A	2a01:111:f403:f90f::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sa9pr04cu00201.inbound.protection.outlook.com`
		A	52.101.41.26^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sj0pr03cu01702.inbound.protection.outlook.com`
		A	52.101.42.16^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-co1pr05cu00300.inbound.protection.outlook.com`
		A	52.101.50.10^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-mw2pr02cu00502.inbound.protection.outlook.com`
		A	52.101.194.17^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-ch5pr02cu00401.inbound.protection.outlook.com`
TXT	`v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:spf.protectio...`
TXT	`MS=ms73662216`
SOA	`a1-74.akam.net`dns_admins@ajg.com 2023-09-05 #8

`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=1774655102

Same first word

kosterins.net

kosterins.com

Similar names

DNS History

21 records (7 active, 14 former)

●NSa1-74.akam.net2026-03-22 → 2026-03-28 · 3 obs

○ 2020-04-04 22:16:10
● 2026-03-22 10:55:08
● 2026-03-28 00:04:06

●NSa14-67.akam.net2026-03-22 → 2026-03-28 · 3 obs

○ 2020-04-04 22:16:10
● 2026-03-22 10:55:08
● 2026-03-28 00:04:06

●NSa24-64.akam.net2026-03-22 → 2026-03-28 · 3 obs

○ 2020-04-04 22:16:10
● 2026-03-22 10:55:08
● 2026-03-28 00:04:06

●NSa26-64.akam.net2026-03-22 → 2026-03-28 · 3 obs

○ 2020-04-04 22:16:10
● 2026-03-22 10:55:08
● 2026-03-28 00:04:06

●NSa3-64.akam.net2026-03-22 → 2026-03-28 · 3 obs

○ 2020-04-04 22:16:10
● 2026-03-22 10:55:08
● 2026-03-28 00:04:06

●NSa5-64.akam.net2026-03-22 → 2026-03-28 · 3 obs

○ 2020-04-04 22:16:10
● 2026-03-22 10:55:08
● 2026-03-28 00:04:06

○NSns1.ajgco.com2016-09-23 → 2017-04-08 · 5 obs

○ 2016-07-25 00:34:44
● 2016-09-23 17:58:44
● 2017-04-08 17:04:52
○ 2020-04-04 22:16:10
○ 2026-03-28 00:04:06

○NSns1.us.ajg.com2015-07-01 → 2016-07-25 · 5 obs

○ 2007-10-24 00:09:14
● 2015-07-01 09:45:06
● 2016-07-25 00:34:44
○ 2016-09-23 17:58:44
○ 2026-03-28 00:04:06

○NSns2.ajgco.com2016-09-23 → 2017-04-08 · 5 obs

○ 2016-07-25 00:34:44
● 2016-09-23 17:58:44
● 2017-04-08 17:04:52
○ 2020-04-04 22:16:10
○ 2026-03-28 00:04:06

○NSns2.us.ajg.com2015-07-01 → 2016-07-25 · 5 obs

○ 2007-10-24 00:09:14
● 2015-07-01 09:45:06
● 2016-07-25 00:34:44
○ 2016-09-23 17:58:44
○ 2026-03-28 00:04:06

○NSns3.ajgco.com2020-04-04 → 2020-04-04 · 4 obs

○ 2017-04-08 17:04:52
● 2020-04-04 22:16:10
○ 2026-03-22 10:55:08
○ 2026-03-28 00:04:06

○NSns3.us.ajg.com2015-07-01 → 2016-07-25 · 5 obs

○ 2007-10-24 00:09:14
● 2015-07-01 09:45:06
● 2016-07-25 00:34:44
○ 2016-09-23 17:58:44
○ 2026-03-28 00:04:06

○NSns4.ajgco.com2020-04-04 → 2020-04-04 · 4 obs

○ 2017-04-08 17:04:52
● 2020-04-04 22:16:10
○ 2026-03-22 10:55:08
○ 2026-03-28 00:04:06

○NSns4.us.ajg.com2015-07-01 → 2016-07-25 · 5 obs

○ 2007-10-24 00:09:14
● 2015-07-01 09:45:06
● 2016-07-25 00:34:44
○ 2016-09-23 17:58:44
○ 2026-03-28 00:04:06

○NSns77.worldnic.com2007-10-24 → 2007-10-24 · 3 obs

● 2007-10-24 00:09:14
○ 2015-07-01 09:45:06
○ 2026-03-28 00:04:06

○NSns78.worldnic.com2007-10-24 → 2007-10-24 · 3 obs

● 2007-10-24 00:09:14
○ 2015-07-01 09:45:06
○ 2026-03-28 00:04:06

○MXcluster4.us.messagelabs.com2015-07-01 → 2020-04-04 · 5 obs

○ 2007-10-24 00:09:14
● 2015-07-01 09:45:06
● 2020-04-04 22:16:10
○ 2026-03-22 10:55:08
○ 2026-03-28 00:04:06

○MXcluster4a.us.messagelabs.com2015-07-01 → 2020-04-04 · 5 obs

○ 2007-10-24 00:09:14
● 2015-07-01 09:45:06
● 2020-04-04 22:16:10
○ 2026-03-22 10:55:08
○ 2026-03-28 00:04:06

●MXkosterins-com.mail.protection.outlook.com2026-03-22 → 2026-03-28 · 3 obs

○ 2020-04-04 22:16:10
● 2026-03-22 10:55:08
● 2026-03-28 00:04:06

○MXsmtpd001.intermedia.net2007-10-24 → 2007-10-24 · 3 obs

● 2007-10-24 00:09:14
○ 2015-07-01 09:45:06
○ 2026-03-28 00:04:06

○A207.234.158.592007-10-24 → 2007-10-24 · 3 obs

● 2007-10-24 00:09:14
○ 2015-07-01 09:45:06
○ 2026-03-28 00:04:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	e.gtld-servers.net, f.gtld-servers.net, d.gtld-servers.net, l.gtld-servers.net...	-
kosterins.com	a3-64.akam.net, a14-67.akam.net, a24-64.akam.net, a5-64.akam.net...	-

✅ Authoritative Response

Server:193.108.91.74

NS records: a3-64.akam.net, a14-67.akam.net, a24-64.akam.net, a5-64.akam.net, a26-64.akam.net, a1-74.akam.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for kosterins.com (unsigned zone)

⏱️ Timing

Total: 782ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	6	`a24-64.akam.net, a26-64.akam.net...`
MX	1	`kosterins-com.mail.protection.outlook.co`
TXT	2	`MS=ms73662216, v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}.`
SOA	1	`a1-74.akam.net dns_admins.ajg.com`

Analysis

Name Servers

kosterins.com is delegated to six name servers: a1-74.akam.net, a14-67.akam.net, a24-64.akam.net, a26-64.akam.net, a3-64.akam.net and a5-64.akam.net.

kosterins.com at least partially shares name servers with other domains, for instance 192.68.192.in-addr.arpa, amrresearch.co.uk, bankofanerica.top, stanleytools.com and eastpak.com.pa.

These name servers are commonly used alongside a5-66.akam.net, a12-64.akam.net, a13-67.akam.net, a9-65.akam.net, a13-66.akam.net, a9-67.akam.net, a10-65.akam.net, ns1.vfc.com, a1-250.akam.net and a9-66.akam.net.

Host names with two IP numbers: a1-74.akam.net points to 2600:1401:2::4a and 193.108.91.74; a14-67.akam.net points to 2600:1480:1800::43 and 184.26.161.67; a24-64.akam.net points to 2600:1480:9800::40 and 2.16.130.64; a26-64.akam.net points to 2600:1480:b800::40 and 23.74.25.64; a3-64.akam.net points to 2600:1408:1c::40 and 96.7.49.64; a5-64.akam.net points to 2600:1480:b000::40 and 95.100.168.64.

Mail Servers

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

Host name kosterins-com.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:c801::, 2a01:111:f403:c902::1, 2a01:111:f403:c902::14, 2a01:111:f403:f90f::1, 52.101.41.26, 52.101.42.16, 52.101.50.10 and 52.101.194.17.

kosterins.com - robtex.com

kosterins.com

com

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Name Servers

Mail Servers

`kosterins.com`

`com`