courseko.com - dns.ninja

`courseko.com`

DNSSEC	⚠️ Not signed
A	2600:1f18:4ae:c605:dd5d:b838:5816:d7fb^{🇺🇸 Amazon2600:1f18::/35 AMAZON EC2 IAD prefix}
A	2600:1f18:4ae:c606:78d4:4260:db4e:aeee^{🇺🇸 Amazon2600:1f18::/35 AMAZON EC2 IAD prefix}
A	13.223.25.84^{🇺🇸 Amazon13.216.0.0/13 EC2 IAD prefix}
A	54.243.117.197^{🇺🇸 Amazon54.242.0.0/15 EC2 IAD prefix}
NS	`ns1.namebrightdns.com` ⭐
		A	2600:1f18:683a:ae1a:c41d:b4cf:322b:2aa6^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	3.89.42.183^{🇺🇸 Amazon3.80.0.0/12 EC2 IAD prefix}
			PTR	`ec2-3-89-42-183.compute-1.amazonaws.com`
		A	100.58.124.42^{🇺🇸 Amazon100.48.0.0/12 EC2 IAD prefix}
			PTR	`ec2-100-58-124-42.compute-1.amazonaws.com`
NS	`nsg1.namebrightdns.com`
		A	2600:1f18:683a:ae1a:4f4e:999e:923d:5c17^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	2600:1f18:683a:ae1a:9b5a:7d38:2d23:6714^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	2600:1f18:683a:ae1b:53a5:7e50:1f55:7b6f^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	2600:1f18:683a:ae1b:c77b:8621:67b5:65^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	54.152.124.255^{🇺🇸 Amazon54.152.0.0/16 EC2 IAD prefix}
			PTR	`ec2-54-152-124-255.compute-1.amazonaws.com`
		A	54.211.183.184^{🇺🇸 Amazon54.211.0.0/16 EC2 IAD prefix}
			PTR	`ec2-54-211-183-184.compute-1.amazonaws.com`
		A	100.27.188.59^{🇺🇸 Amazon100.24.0.0/13 EC2 IAD prefix}
			PTR	`ec2-100-27-188-59.compute-1.amazonaws.com`
NS	`nsg2.namebrightdns.com`
		A	2600:1f18:683a:ae1a:1ff8:84b4:19de:5ca6^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	2600:1f18:683a:ae1b:ac3c:fcfb:521d:2fd5^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	54.162.235.48^{🇺🇸 Amazon54.160.0.0/14 EC2 IAD prefix}
			PTR	`ec2-54-162-235-48.compute-1.amazonaws.com`
		A	54.221.37.2^{🇺🇸 Amazon54.221.0.0/16 EC2 IAD prefix}
			PTR	`ec2-54-221-37-2.compute-1.amazonaws.com`
		A	54.235.53.129^{🇺🇸 Amazon54.234.0.0/15 EC2 IAD prefix}
			PTR	`ec2-54-235-53-129.compute-1.amazonaws.com`
TXT	`v=spf1 -all`
TXT	`afternic-verification-G9G3tM8T8EwEizzPzjGJWF`
SOA	`ns1.namebrightdns.com`dns@namebright.com 2026-08-09 #1

`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=1786327384

Same first word

courseko.com

Similar names

cooksure.com

eurosock.com

recosoku.com

okcourse.com

oksource.com

DNS History

21 records (7 active, 14 former)

○NSns-fr.1and1-dns.biz2015-07-08 → 2015-11-16 · 4 obs

● 2015-07-08 10:19:34
● 2015-11-16 03:39:14
○ 2016-02-28 11:54:32
○ 2026-08-10 02:30:04

○NSns-fr.1and1-dns.com2015-07-08 → 2015-11-16 · 4 obs

● 2015-07-08 10:19:34
● 2015-11-16 03:39:14
○ 2016-02-28 11:54:32
○ 2026-08-10 02:30:04

○NSns-fr.1and1-dns.fr2015-07-08 → 2015-11-16 · 4 obs

● 2015-07-08 10:19:34
● 2015-11-16 03:39:14
○ 2016-02-28 11:54:32
○ 2026-08-10 02:30:04

○NSns-fr.1and1-dns.org2015-07-08 → 2015-11-16 · 4 obs

● 2015-07-08 10:19:34
● 2015-11-16 03:39:14
○ 2016-02-28 11:54:32
○ 2026-08-10 02:30:04

●NSns1.namebrightdns.com2026-07-02 → 2026-08-10 · 3 obs

○ 2020-02-22 21:37:52
● 2026-07-02 09:58:10
● 2026-08-10 02:30:04

○NSns57.domaincontrol.com2017-03-24 → 2017-03-24 · 4 obs

○ 2016-02-28 11:54:32
● 2017-03-24 16:33:46
○ 2020-02-22 21:37:52
○ 2026-08-10 02:30:04

○NSns58.domaincontrol.com2017-03-24 → 2017-03-24 · 4 obs

○ 2016-02-28 11:54:32
● 2017-03-24 16:33:46
○ 2020-02-22 21:37:52
○ 2026-08-10 02:30:04

●NSnsg1.namebrightdns.com2020-02-22 → 2026-08-10 · 3 obs

○ 2017-03-24 16:33:46
● 2020-02-22 21:37:52
● 2026-08-10 02:30:04

●NSnsg2.namebrightdns.com2020-02-22 → 2026-08-10 · 3 obs

○ 2017-03-24 16:33:46
● 2020-02-22 21:37:52
● 2026-08-10 02:30:04

○MXmailstore1.secureserver.net2017-03-24 → 2017-03-24 · 4 obs

○ 2016-02-28 11:54:32
● 2017-03-24 16:33:46
○ 2020-02-22 21:37:52
○ 2026-08-10 02:30:04

○MXmx00.1and1.fr2015-07-08 → 2015-11-16 · 4 obs

● 2015-07-08 10:19:34
● 2015-11-16 03:39:14
○ 2016-02-28 11:54:32
○ 2026-08-10 02:30:04

○MXmx01.1and1.fr2015-07-08 → 2015-11-16 · 4 obs

● 2015-07-08 10:19:34
● 2015-11-16 03:39:14
○ 2016-02-28 11:54:32
○ 2026-08-10 02:30:04

○MXsmtp.secureserver.net2017-03-24 → 2017-03-24 · 4 obs

○ 2016-02-28 11:54:32
● 2017-03-24 16:33:46
○ 2020-02-22 21:37:52
○ 2026-08-10 02:30:04

●A13.223.25.842026-07-02 → 2026-08-10 · 3 obs

○ 2020-02-22 21:37:52
● 2026-07-02 09:58:10
● 2026-08-10 02:30:04

○A184.168.221.582017-03-24 → 2017-03-24 · 4 obs

○ 2016-02-28 11:54:32
● 2017-03-24 16:33:46
○ 2020-02-22 21:37:52
○ 2026-08-10 02:30:04

○A2001:8d8:1000:70d0:b8c6:1e8:71bc:38112015-07-08 → 2015-11-16 · 4 obs

● 2015-07-08 10:19:34
● 2015-11-16 03:39:14
○ 2016-02-28 11:54:32
○ 2026-08-10 02:30:04

●A2600:1f18:4ae:c605:dd5d:b838:5816:d7fb2026-07-02 → 2026-08-10 · 3 obs

○ 2020-02-22 21:37:52
● 2026-07-02 09:58:10
● 2026-08-10 02:30:04

●A2600:1f18:4ae:c606:78d4:4260:db4e:aeee2026-07-02 → 2026-08-10 · 3 obs

○ 2020-02-22 21:37:52
● 2026-07-02 09:58:10
● 2026-08-10 02:30:04

●A54.243.117.1972026-07-02 → 2026-08-10 · 3 obs

○ 2020-02-22 21:37:52
● 2026-07-02 09:58:10
● 2026-08-10 02:30:04

○A87.106.115.102015-07-08 → 2015-11-16 · 4 obs

● 2015-07-08 10:19:34
● 2015-11-16 03:39:14
○ 2016-02-28 11:54:32
○ 2026-08-10 02:30:04

○CNAMEhdredirect-lb5-1afb6e2973825a56.elb.us-east-1.amazonaws.com2020-02-22 → 2020-02-22 · 3 obs

● 2020-02-22 21:37:52
○ 2026-07-02 09:58:10
○ 2026-08-10 02:30:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
courseko.com	nsg1.namebrightdns.com, nsg2.namebrightdns.com	12 records

✅ Authoritative Response

Server:100.27.188.59

NS records: nsg1.namebrightdns.com, nsg2.namebrightdns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for courseko.com (unsigned zone)

⏱️ Timing

Total: 1492ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`54.243.117.197, 13.223.25.84`
AAAA	2	`2600:1f18:4ae:c606:78d4:4260:db4e:aeee, 2600:1f18:4ae:c605:dd5d:b838:5816:d7fb`
NS	2	`nsg2.namebrightdns.com, nsg1.namebrightdns.com`
TXT	2	`v=spf1 -all, afternic-verification-G9G3tM8T8EwEizzPzj`
SOA	1	`ns1.namebrightdns.com dns.namebright.com`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (nsg1.namebrightdns.com, nsg1.namebrightdns.com, nsg1.namebrightdns.com...)

Analysis

IP Addresses

courseko.com has four IP addresses: 13.223.25.84, 54.243.117.197, 2600:1f18:4ae:c605:dd5d:b838:5816:d7fb and 2600:1f18:4ae:c606:78d4:4260:db4e:aeee.

mail.focalfit.com, shlchina.com, ethresources.com and two other host names share IP numbers with courseko.com.

Name Servers

courseko.com is delegated to three name servers: ns1.namebrightdns.com, nsg1.namebrightdns.com and nsg2.namebrightdns.com.

courseko.com shares at least some of its name servers with other domains, including gospelchoice.com, visualproto.com, www.ikincielbeyazesya.com and two others.

These name servers are frequently paired with the name servers ns2.namebrightdns.com, domain-for-sale.hugedomainsdns.com and forsale.hugedomainsdns.com.

Hostnames that resolve to 7 IP addresses:

nsg1.namebrightdns.com resolves to 54.152.124.255, 54.211.183.184, 100.27.188.59 and 4 other IP addresses.

Hostnames pointing to five IP numbers:

nsg2.namebrightdns.com resolves to four IP addresses: 54.162.235.48, 54.221.37.2, 54.235.53.129 and two others.

Hostnames that resolve to three IP addresses:

ns1.namebrightdns.com points to 3.89.42.183, 100.58.124.42 and 2600:1f18:683a:ae1a:c41d:b4cf:322b:2aa6.