theoryofcomputing.com - dns.ninja

`theoryofcomputing.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	3.81.83.148^{🇺🇸 Amazon3.80.0.0/12 EC2 IAD prefix}
			PTR	`ec2-3-81-83-148.compute-1.amazonaws.com`
		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`
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:8e29:87d8:f97c:1291^{🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix}
		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`
		A	100.27.188.59^{🇺🇸 Amazon100.24.0.0/13 EC2 IAD prefix}
			PTR	`ec2-100-27-188-59.compute-1.amazonaws.com`
TXT	`v=spf1 -all`
TXT	`afternic-verification-G9G3tM8T8EwEizzPzjGJWF`
SOA	`ns1.namebrightdns.com`dns@namebright.com 2026-08-10 #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=1786369819

Same first word

theoryofcomputing.org

theoryofcomputing.com

theoryofcomputing.net

DNS History

22 records (7 active, 15 former)

●NSns1.namebrightdns.com2015-07-17 → 2026-08-10 · 7 obs

● 2015-07-17 05:07:50
● 2015-11-18 12:05:16
○ 2016-02-10 22:28:12
● 2016-05-01 09:50:52
○ 2016-12-27 09:37:58
● 2017-12-08 09:07:18
● 2026-08-10 14:08:28

○NSns2.namebrightdns.com2015-07-17 → 2017-12-08 · 8 obs

● 2015-07-17 05:07:50
● 2015-11-18 12:05:16
○ 2016-02-10 22:28:12
● 2016-05-01 09:50:52
○ 2016-12-27 09:37:58
● 2017-12-08 09:07:18
○ 2026-02-25 10:30:46
○ 2026-08-10 14:08:28

●NSnsg1.namebrightdns.com2016-02-10 → 2026-08-10 · 6 obs

○ 2015-11-18 12:05:16
● 2016-02-10 22:28:12
○ 2016-05-01 09:50:52
○ 2017-12-08 09:07:18
● 2026-02-25 10:30:46
● 2026-08-10 14:08:28

●NSnsg2.namebrightdns.com2016-02-10 → 2026-08-10 · 6 obs

○ 2015-11-18 12:05:16
● 2016-02-10 22:28:12
○ 2016-05-01 09:50:52
○ 2017-12-08 09:07:18
● 2026-02-25 10:30:46
● 2026-08-10 14:08:28

○NSnst1.namebrightdns.com2016-12-27 → 2016-12-27 · 4 obs

○ 2016-05-01 09:50:52
● 2016-12-27 09:37:58
○ 2017-12-08 09:07:18
○ 2026-08-10 14:08:28

○NSnst2.namebrightdns.com2016-12-27 → 2016-12-27 · 4 obs

○ 2016-05-01 09:50:52
● 2016-12-27 09:37:58
○ 2017-12-08 09:07:18
○ 2026-08-10 14:08:28

○MXanmail.namebrightmail.com2015-07-17 → 2015-07-17 · 3 obs

● 2015-07-17 05:07:50
○ 2015-11-18 12:05:16
○ 2026-08-10 14:08:28

●A13.223.25.842026-02-25 → 2026-08-10 · 3 obs

○ 2017-12-08 09:07:18
● 2026-02-25 10:30:46
● 2026-08-10 14:08:28

●A2600:1f18:4ae:c605:dd5d:b838:5816:d7fb2026-02-25 → 2026-08-10 · 3 obs

○ 2017-12-08 09:07:18
● 2026-02-25 10:30:46
● 2026-08-10 14:08:28

●A2600:1f18:4ae:c606:78d4:4260:db4e:aeee2026-02-25 → 2026-08-10 · 3 obs

○ 2017-12-08 09:07:18
● 2026-02-25 10:30:46
● 2026-08-10 14:08:28

○A52.0.96.242016-02-10 → 2016-02-10 · 4 obs

○ 2015-11-18 12:05:16
● 2016-02-10 22:28:12
○ 2016-05-01 09:50:52
○ 2026-08-10 14:08:28

○A52.200.243.1232016-05-01 → 2016-05-01 · 4 obs

○ 2016-02-10 22:28:12
● 2016-05-01 09:50:52
○ 2016-12-27 09:37:58
○ 2026-08-10 14:08:28

○A52.44.229.1842016-12-27 → 2016-12-27 · 4 obs

○ 2016-05-01 09:50:52
● 2016-12-27 09:37:58
○ 2017-12-08 09:07:18
○ 2026-08-10 14:08:28

○A52.71.117.992016-02-10 → 2016-02-10 · 4 obs

○ 2015-11-18 12:05:16
● 2016-02-10 22:28:12
○ 2016-05-01 09:50:52
○ 2026-08-10 14:08:28

○A54.152.144.2432016-05-01 → 2016-05-01 · 4 obs

○ 2016-02-10 22:28:12
● 2016-05-01 09:50:52
○ 2016-12-27 09:37:58
○ 2026-08-10 14:08:28

○A54.174.31.2542015-07-17 → 2015-11-18 · 4 obs

● 2015-07-17 05:07:50
● 2015-11-18 12:05:16
○ 2016-02-10 22:28:12
○ 2026-08-10 14:08:28

○A54.208.74.2152015-07-17 → 2015-11-18 · 4 obs

● 2015-07-17 05:07:50
● 2015-11-18 12:05:16
○ 2016-02-10 22:28:12
○ 2026-08-10 14:08:28

●A54.243.117.1972026-02-25 → 2026-08-10 · 3 obs

○ 2017-12-08 09:07:18
● 2026-02-25 10:30:46
● 2026-08-10 14:08:28

○A54.84.53.382016-12-27 → 2016-12-27 · 4 obs

○ 2016-05-01 09:50:52
● 2016-12-27 09:37:58
○ 2017-12-08 09:07:18
○ 2026-08-10 14:08:28

○A54.88.107.1402016-12-27 → 2016-12-27 · 4 obs

○ 2016-05-01 09:50:52
● 2016-12-27 09:37:58
○ 2017-12-08 09:07:18
○ 2026-08-10 14:08:28

○CNAMEhdredirect-lb-399551664.us-east-1.elb.amazonaws.com2015-07-17 → 2016-05-01 · 4 obs

● 2015-07-17 05:07:50
● 2016-05-01 09:50:52
○ 2016-12-27 09:37:58
○ 2026-08-10 14:08:28

○CNAMEhdredirect-lb3-890977680.us-east-1.elb.amazonaws.com2016-12-27 → 2017-12-08 · 5 obs

○ 2016-05-01 09:50:52
● 2016-12-27 09:37:58
● 2017-12-08 09:07:18
○ 2026-02-25 10:30:46
○ 2026-08-10 14:08:28

🔍 DNS Trace

📋 Delegation Chain

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

✅ Authoritative Response

Server:54.152.124.255

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for theoryofcomputing.com (unsigned zone)

⏱️ Timing

Total: 112ms | 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	`nsg1.namebrightdns.com, nsg2.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

theoryofcomputing.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.

build-www.comeearn.com, threesale.com, myaircare.com plus two other host names have IP numbers in common with theoryofcomputing.com.

Name Servers

theoryofcomputing.com has three name servers — ns1.namebrightdns.com, nsg1.namebrightdns.com and nsg2.namebrightdns.com.

The name servers of theoryofcomputing.com overlap at least partially with those of other domains — among them diningstars.com, madebycaroline.com, tutorello.com and two more.

The name servers ns2.namebrightdns.com, domain-for-sale.hugedomainsdns.com and forsale.hugedomainsdns.com are commonly seen alongside these name servers.

Hosts with 7 IP addresses each:

nsg1.namebrightdns.com points to 3.81.83.148, 54.152.124.255, 54.211.183.184 and 4 other IP addresses.

Hosts with five IP addresses:

nsg2.namebrightdns.com has IP addresses 54.221.37.2, 54.235.53.129 and 100.27.188.59 along with two other addresses.

Host names carrying three IP numbers:

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