coursefirst.com - dns.ninja

`coursefirst.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:6900:d1bd:7672:d0ca^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	2600:1f18:683a:ae1a:7bc2:638d:8ca6:fcc4^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	2600:1f18:683a:ae1b:3d91:676:6a3b:630e^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	2600:1f18:683a:ae1b:b00c:8d5c:a9a3:9538^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	13.218.191.141^{🇺🇸 Amazon13.216.0.0/13 EC2 IAD prefix}
			PTR	`ec2-13-218-191-141.compute-1.amazonaws.com`
		A	52.203.211.134^{🇺🇸 Amazon52.200.0.0/13 EC2 IAD prefix}
			PTR	`ec2-52-203-211-134.compute-1.amazonaws.com`
NS	`nsg1.namebrightdns.com`
		A	2600:1f18:683a:ae1a:4a5c:f736:fa58:d85^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	2600:1f18:683a:ae1b:a80d:aa66:fb:1e18^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	3.88.240.25^{🇺🇸 Amazon3.80.0.0/12 EC2 IAD prefix}
			PTR	`ec2-3-88-240-25.compute-1.amazonaws.com`
		A	52.55.198.41^{🇺🇸 Amazon52.54.0.0/15 EC2 Region prefix}
			PTR	`ec2-52-55-198-41.compute-1.amazonaws.com`
		A	54.175.130.15^{🇺🇸 Amazon54.174.0.0/15 EC2 IAD prefix}
			PTR	`ec2-54-175-130-15.compute-1.amazonaws.com`
NS	`nsg2.namebrightdns.com`
		A	2600:1f18:683a:ae1a:7b03:f4b:4bfa:8287^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	2600:1f18:683a:ae1a:cc5d:cd19:dd5:828e^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	2600:1f18:683a:ae1b:3ee4:3218:624e:fbef^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	2600:1f18:683a:ae1b:5b81:82bc:6de0:b02c^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	3.80.109.14^{🇺🇸 Amazon3.80.0.0/12 EC2 IAD prefix}
			PTR	`ec2-3-80-109-14.compute-1.amazonaws.com`
		A	18.232.139.44^{🇺🇸 Amazon18.232.0.0/14 EC2 IAD prefix}
			PTR	`ec2-18-232-139-44.compute-1.amazonaws.com`
		A	98.81.3.34^{🇺🇸 Amazon98.80.0.0/13 EC2 IAD Prefix}
			PTR	`ec2-98-81-3-34.compute-1.amazonaws.com`
TXT	`v=spf1 -all`
TXT	`afternic-verification-G9G3tM8T8EwEizzPzjGJWF`
SOA	`ns1.namebrightdns.com`dns@namebright.com 2026-06-15 #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=1781587165

Same first word

coursefirst.com

Similar names

DNS History

28 records (7 active, 21 former)

○NSns1.crazydomains.com2015-08-17 → 2015-12-01 · 4 obs

● 2015-08-17 15:29:16
● 2015-12-01 04:09:48
○ 2016-03-11 01:26:28
○ 2026-06-16 05:44:06

●NSns1.namebrightdns.com2026-03-24 → 2026-06-16 · 3 obs

○ 2026-03-19 05:28:14
● 2026-03-24 05:35:40
● 2026-06-16 05:44:06

○NSns1.resolved.net.au2019-02-07 → 2019-02-07 · 4 obs

○ 2017-03-13 06:38:58
● 2019-02-07 08:14:18
○ 2026-03-19 05:28:14
○ 2026-06-16 05:44:06

○NSns2.crazydomains.com2015-08-17 → 2015-12-01 · 4 obs

● 2015-08-17 15:29:16
● 2015-12-01 04:09:48
○ 2016-03-11 01:26:28
○ 2026-06-16 05:44:06

○NSns2.resolved.net.au2019-02-07 → 2019-02-07 · 4 obs

○ 2017-03-13 06:38:58
● 2019-02-07 08:14:18
○ 2026-03-19 05:28:14
○ 2026-06-16 05:44:06

○NSns43.domaincontrol.com2016-03-11 → 2017-03-13 · 5 obs

○ 2015-12-01 04:09:48
● 2016-03-11 01:26:28
● 2017-03-13 06:38:58
○ 2019-02-07 08:14:18
○ 2026-06-16 05:44:06

○NSns44.domaincontrol.com2016-03-11 → 2017-03-13 · 5 obs

○ 2015-12-01 04:09:48
● 2016-03-11 01:26:28
● 2017-03-13 06:38:58
○ 2019-02-07 08:14:18
○ 2026-06-16 05:44:06

●NSnsg1.namebrightdns.com2026-03-24 → 2026-06-16 · 3 obs

○ 2026-03-19 05:28:14
● 2026-03-24 05:35:40
● 2026-06-16 05:44:06

●NSnsg2.namebrightdns.com2026-03-24 → 2026-06-16 · 3 obs

○ 2026-03-19 05:28:14
● 2026-03-24 05:35:40
● 2026-06-16 05:44:06

○MXalt1.aspmx.l.google.com2016-06-26 → 2019-02-07 · 5 obs

○ 2016-03-11 01:26:28
● 2016-06-26 03:04:18
● 2019-02-07 08:14:18
○ 2026-03-19 05:28:14
○ 2026-06-16 05:44:06

○MXalt2.aspmx.l.google.com2016-06-26 → 2019-02-07 · 5 obs

○ 2016-03-11 01:26:28
● 2016-06-26 03:04:18
● 2019-02-07 08:14:18
○ 2026-03-19 05:28:14
○ 2026-06-16 05:44:06

○MXalt3.aspmx.l.google.com2016-06-26 → 2019-02-07 · 5 obs

○ 2016-03-11 01:26:28
● 2016-06-26 03:04:18
● 2019-02-07 08:14:18
○ 2026-03-19 05:28:14
○ 2026-06-16 05:44:06

○MXalt4.aspmx.l.google.com2016-06-26 → 2019-02-07 · 5 obs

○ 2016-03-11 01:26:28
● 2016-06-26 03:04:18
● 2019-02-07 08:14:18
○ 2026-03-19 05:28:14
○ 2026-06-16 05:44:06

○MXanmail.namebrightmail.com2026-03-24 → 2026-03-24 · 4 obs

○ 2026-03-19 05:28:14
● 2026-03-24 05:35:40
○ 2026-03-25 18:02:24
○ 2026-06-16 05:44:06

○MXaspmx.l.google.com2016-06-26 → 2019-02-07 · 5 obs

○ 2016-03-11 01:26:28
● 2016-06-26 03:04:18
● 2019-02-07 08:14:18
○ 2026-03-19 05:28:14
○ 2026-06-16 05:44:06

○MXmail.coursefirst.com2016-03-11 → 2016-03-11 · 3 obs

● 2016-03-11 01:26:28
○ 2016-06-26 03:04:18
○ 2026-06-16 05:44:06

●A13.223.25.842026-03-24 → 2026-06-16 · 5 obs

○ 2026-03-19 05:28:14
● 2026-03-24 05:35:40
○ 2026-03-25 18:02:24
● 2026-06-04 19:26:02
● 2026-06-16 05:44:06

○A166.62.46.2102016-06-26 → 2017-03-13 · 5 obs

○ 2016-03-11 01:26:28
● 2016-06-26 03:04:18
● 2017-03-13 06:38:58
○ 2019-02-07 08:14:18
○ 2026-06-16 05:44:06

○A166.62.6.1022016-03-11 → 2016-03-11 · 4 obs

○ 2015-12-01 04:09:48
● 2016-03-11 01:26:28
○ 2016-06-26 03:04:18
○ 2026-06-16 05:44:06

○A203.170.80.2502015-08-17 → 2015-12-01 · 4 obs

● 2015-08-17 15:29:16
● 2015-12-01 04:09:48
○ 2016-03-11 01:26:28
○ 2026-06-16 05:44:06

●A2600:1f18:4ae:c605:dd5d:b838:5816:d7fb2026-03-24 → 2026-06-16 · 5 obs

○ 2026-03-19 05:28:14
● 2026-03-24 05:35:40
○ 2026-03-25 18:02:24
● 2026-06-04 19:26:02
● 2026-06-16 05:44:06

○A2600:1f18:4ae:c605:f094:2a0a:4985:526e2026-03-25 → 2026-03-25 · 4 obs

○ 2026-03-24 05:35:40
● 2026-03-25 18:02:24
○ 2026-06-04 19:26:02
○ 2026-06-16 05:44:06

●A2600:1f18:4ae:c606:78d4:4260:db4e:aeee2026-03-24 → 2026-06-16 · 5 obs

○ 2026-03-19 05:28:14
● 2026-03-24 05:35:40
○ 2026-03-25 18:02:24
● 2026-06-04 19:26:02
● 2026-06-16 05:44:06

○A2600:1f18:4ae:c606:def:b9d9:eb9e:77662026-03-25 → 2026-03-25 · 4 obs

○ 2026-03-24 05:35:40
● 2026-03-25 18:02:24
○ 2026-06-04 19:26:02
○ 2026-06-16 05:44:06

○A43.245.162.2032019-02-07 → 2019-02-07 · 4 obs

○ 2017-03-13 06:38:58
● 2019-02-07 08:14:18
○ 2026-03-19 05:28:14
○ 2026-06-16 05:44:06

○A52.201.53.1662026-03-25 → 2026-03-25 · 4 obs

○ 2026-03-24 05:35:40
● 2026-03-25 18:02:24
○ 2026-06-04 19:26:02
○ 2026-06-16 05:44:06

●A54.243.117.1972026-03-24 → 2026-06-16 · 5 obs

○ 2026-03-19 05:28:14
● 2026-03-24 05:35:40
○ 2026-03-25 18:02:24
● 2026-06-04 19:26:02
● 2026-06-16 05:44:06

○A98.82.42.1392026-03-25 → 2026-03-25 · 4 obs

○ 2026-03-24 05:35:40
● 2026-03-25 18:02:24
○ 2026-06-04 19:26:02
○ 2026-06-16 05:44:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
coursefirst.com	nsg1.namebrightdns.com, nsg2.namebrightdns.com	12 records

✅ Authoritative Response

Server:18.232.139.44

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coursefirst.com (unsigned zone)

⏱️ Timing

Total: 279ms | Queries: -

📄 Records

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

coursefirst.com points to the 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.

Additional host names — warmstories.com, 50-57-67-194.static.cloud-ips.com, warpdriven.com and two others — share IP numbers with coursefirst.com.

Name Servers

coursefirst.com is served by three name servers: ns1.namebrightdns.com, nsg1.namebrightdns.com and nsg2.namebrightdns.com.

At least some of coursefirst.com's name servers are shared with other domains, for example underlicious.com, breadandbetter.com, litecoinminer.com and two more.

It is common for these name servers to be used in conjunction with the name servers ns2.namebrightdns.com, domain-for-sale.hugedomainsdns.com and forsale.hugedomainsdns.com.

Host names with 7 IP numbers:

nsg2.namebrightdns.com maps to 3.80.109.14, 18.232.139.44, 98.81.3.34 and 4 additional IP addresses.

Host names with 6 IP numbers:

ns1.namebrightdns.com maps to 13.218.191.141, 52.203.211.134, 2600:1f18:683a:ae1a:6900:d1bd:7672:d0ca and 3 additional IP addresses.

Host names that resolve to five IP addresses:

nsg1.namebrightdns.com points to 3.88.240.25, 52.55.198.41, 54.175.130.15 and two other IP addresses.