arcourse.com - dns.ninja

`arcourse.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:d57d:390a:64b4:d4f1^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		A	52.203.211.134^{🇺🇸 Amazon52.200.0.0/13 EC2 IAD prefix}
			PTR	`ec2-52-203-211-134.compute-1.amazonaws.com`
		A	52.204.81.90^{🇺🇸 Amazon52.200.0.0/13 EC2 IAD prefix}
			PTR	`ec2-52-204-81-90.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:5b81:82bc:6de0:b02c^{🇺🇸 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	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 2026-06-28 #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=1782636150

Previously MX for

arcourse.com

Same first word

arcourse.com

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DNS History

18 records (7 active, 11 former)

○NScorporate.vip21.noc40.com2017-01-13 → 2018-09-16 · 5 obs

○ 2016-04-30 06:04:06
● 2017-01-13 19:40:06
● 2018-09-16 11:49:24
○ 2026-02-18 02:38:10
○ 2026-06-28 08:45:38

○NScorporate.vip22.noc40.com2017-01-13 → 2018-09-16 · 5 obs

○ 2016-04-30 06:04:06
● 2017-01-13 19:40:06
● 2018-09-16 11:49:24
○ 2026-02-18 02:38:10
○ 2026-06-28 08:45:38

●NSns1.namebrightdns.com2026-02-18 → 2026-06-28 · 3 obs

○ 2018-09-16 11:49:24
● 2026-02-18 02:38:10
● 2026-06-28 08:45:38

○NSns1.servconfig.com2015-07-07 → 2016-04-30 · 4 obs

● 2015-07-07 22:11:54
● 2016-04-30 06:04:06
○ 2017-01-13 19:40:06
○ 2026-06-28 08:45:38

○NSns2.servconfig.com2015-07-07 → 2016-04-30 · 4 obs

● 2015-07-07 22:11:54
● 2016-04-30 06:04:06
○ 2017-01-13 19:40:06
○ 2026-06-28 08:45:38

●NSnsg1.namebrightdns.com2026-02-18 → 2026-06-28 · 3 obs

○ 2018-09-16 11:49:24
● 2026-02-18 02:38:10
● 2026-06-28 08:45:38

●NSnsg2.namebrightdns.com2026-02-18 → 2026-06-28 · 3 obs

○ 2018-09-16 11:49:24
● 2026-02-18 02:38:10
● 2026-06-28 08:45:38

○MXarcourse.com2015-07-07 → 2018-09-16 · 4 obs

● 2015-07-07 22:11:54
● 2018-09-16 11:49:24
○ 2026-02-18 02:38:10
○ 2026-06-28 08:45:38

○A104.161.23.492017-01-13 → 2018-09-16 · 5 obs

○ 2016-04-30 06:04:06
● 2017-01-13 19:40:06
● 2018-09-16 11:49:24
○ 2026-02-18 02:38:10
○ 2026-06-28 08:45:38

●A13.223.25.842026-04-01 → 2026-06-28 · 3 obs

○ 2026-03-31 04:47:22
● 2026-04-01 01:43:32
● 2026-06-28 08:45:38

○A205.134.238.642015-07-07 → 2016-04-30 · 4 obs

● 2015-07-07 22:11:54
● 2016-04-30 06:04:06
○ 2017-01-13 19:40:06
○ 2026-06-28 08:45:38

●A2600:1f18:4ae:c605:dd5d:b838:5816:d7fb2026-04-01 → 2026-06-28 · 3 obs

○ 2026-03-31 04:47:22
● 2026-04-01 01:43:32
● 2026-06-28 08:45:38

○A2600:1f18:4ae:c605:f094:2a0a:4985:526e2026-02-18 → 2026-03-31 · 5 obs

○ 2018-09-16 11:49:24
● 2026-02-18 02:38:10
● 2026-03-31 04:47:22
○ 2026-04-01 01:43:32
○ 2026-06-28 08:45:38

●A2600:1f18:4ae:c606:78d4:4260:db4e:aeee2026-04-01 → 2026-06-28 · 3 obs

○ 2026-03-31 04:47:22
● 2026-04-01 01:43:32
● 2026-06-28 08:45:38

○A2600:1f18:4ae:c606:def:b9d9:eb9e:77662026-02-18 → 2026-03-31 · 5 obs

○ 2018-09-16 11:49:24
● 2026-02-18 02:38:10
● 2026-03-31 04:47:22
○ 2026-04-01 01:43:32
○ 2026-06-28 08:45:38

○A52.201.53.1662026-02-18 → 2026-03-31 · 5 obs

○ 2018-09-16 11:49:24
● 2026-02-18 02:38:10
● 2026-03-31 04:47:22
○ 2026-04-01 01:43:32
○ 2026-06-28 08:45:38

●A54.243.117.1972026-04-01 → 2026-06-28 · 3 obs

○ 2026-03-31 04:47:22
● 2026-04-01 01:43:32
● 2026-06-28 08:45:38

○A98.82.42.1392026-02-18 → 2026-03-31 · 5 obs

○ 2018-09-16 11:49:24
● 2026-02-18 02:38:10
● 2026-03-31 04:47:22
○ 2026-04-01 01:43:32
○ 2026-06-28 08:45:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
arcourse.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 arcourse.com (unsigned zone)

⏱️ Timing

Total: 214ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`13.223.25.84, 54.243.117.197`
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

arcourse.com resolves to 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.

s102-ckshopinfo2.ias3.com, g.sinegen.com, amazproducts.com plus two other host names have IP numbers in common with arcourse.com.

Name Servers

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

arcourse.com partially shares its NS delegation with several other domains, including 1550.2z2vy.lb568.com, cpuff.com, lhcjb880tmb.henry5.com and two others.

These name servers regularly co-occur with the name servers ns2.namebrightdns.com, domain-for-sale.hugedomainsdns.com and forsale.hugedomainsdns.com.

Hosts with 6 IP addresses each:

nsg1.namebrightdns.com resolves to 3.88.240.25, 52.55.198.41, 54.175.130.15 and 3 other IP addresses.

nsg2.namebrightdns.com resolves to 3.80.109.14, 18.232.139.44, 98.81.3.34 and 3 other IP addresses.

Hosts with five IP addresses:

ns1.namebrightdns.com has IP addresses 52.203.211.134, 52.204.81.90 and 2600:1f18:683a:ae1a:6900:d1bd:7672:d0ca along with two other addresses.