classum.com - dns.ninja

`classum.com`

DNSSEC	⚠️ Not signed
A	16.76.4.83^{🇺🇸 Amazon16.76.0.0/17 EC2 Prefix}
		PTR	`ec2-16-76-4-83.ap-northeast-1.compute.amazonaws.com`
A	52.68.18.89^{🇯🇵 Amazon52.68.0.0/15 EC2 NRT prefix}
A	52.195.76.61^{🇯🇵 Amazon52.194.0.0/15 EC2 NRT prefix}
NS	`ns-373.awsdns-46.com` ⭐
		A	2600:9000:5301:7500::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-373.awsdns-46.com`
		A	205.251.193.117^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-373.awsdns-46.com`
NS	`ns-1071.awsdns-05.org`
		A	2600:9000:5304:2f00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1071.awsdns-05.org`
		A	205.251.196.47^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1071.awsdns-05.org`
NS	`ns-1946.awsdns-51.co.uk`
		A	2600:9000:5307:9a00::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1946.awsdns-51.co.uk`
		A	205.251.199.154^{🇺🇸 Amazon205.251.199.0/24 prefix}
NS	`ns-547.awsdns-04.net`
		A	2600:9000:5302:2300::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-547.awsdns-04.net`
		A	205.251.194.35^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-547.awsdns-04.net`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c08::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bi-in-f26.1e100.net`
		A	142.251.111.27^{🇺🇸 Google142.251.111.0/24}
			PTR	`bk-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.27^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f27.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1a^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f26.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`MS=ms93791466`
TXT	`anthropic-domain-verification-qrrq5a=j0EaD1KKF2SfMLeoITL44SFtY`
TXT	`google-site-verification=YWr5O4bCNOzS1Z3JdiFHnn1AEm3mTE0kAAePH6A7pwg`
TXT	`openai-domain-verification=dv-SLpmfiriTmPWYrJB5LUOcqjp`
TXT	`pardot1062812=8ea282af1e104456880c01206101f8daeee918233a396b9fc64be348d70928b2`
TXT	`sending_domain1062812=39ec9d88e5dfeb97230d5ac9d90e08152d74f041110008a15d133a1...`
TXT	`turbopuffer-domain-verification-en2718=anzIjRYYppdfXVSR9MjmfQdjV`
TXT	`v=spf1 include:_spf.google.com include:_spf.salesforce.com ~all`
SOA	`ns-373.awsdns-46.com`awsdns-hostmaster@amazon.com serial=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=1784712282

Previously MX for

classum.com

Subdomains

drm-proxy.classum.com

api.classum.com

cdn.classum.com

Same first word

classum.org

classum.net

classum.com

Similar names

DNS History

58 records (12 active, 46 former)

○NSandy.ns.cloudflare.com2015-09-15 → 2016-03-14 · 5 obs

○ 2015-06-13 03:20:22
● 2015-09-15 22:49:16
● 2016-03-14 11:46:20
○ 2016-06-06 19:23:40
○ 2026-07-22 09:30:40

○NSlia.ns.cloudflare.com2015-09-15 → 2016-03-14 · 5 obs

○ 2015-06-13 03:20:22
● 2015-09-15 22:49:16
● 2016-03-14 11:46:20
○ 2016-06-06 19:23:40
○ 2026-07-22 09:30:40

●NSns-1071.awsdns-05.org2026-02-15 → 2026-07-22 · 3 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
● 2026-07-22 09:30:40

●NSns-1946.awsdns-51.co.uk2026-02-15 → 2026-07-22 · 3 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
● 2026-07-22 09:30:40

●NSns-373.awsdns-46.com2026-02-15 → 2026-07-22 · 3 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
● 2026-07-22 09:30:40

●NSns-547.awsdns-04.net2026-02-15 → 2026-07-22 · 3 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
● 2026-07-22 09:30:40

○NSns1.classum.com2015-06-13 → 2015-06-13 · 3 obs

● 2015-06-13 03:20:22
○ 2015-09-15 22:49:16
○ 2026-07-22 09:30:40

○NSns1.namebrightdns.com2016-09-19 → 2019-02-22 · 5 obs

○ 2016-06-06 19:23:40
● 2016-09-19 19:52:46
● 2019-02-22 02:09:48
○ 2026-02-15 02:59:36
○ 2026-07-22 09:30:40

○NSns2.classum.com2015-06-13 → 2015-06-13 · 3 obs

● 2015-06-13 03:20:22
○ 2015-09-15 22:49:16
○ 2026-07-22 09:30:40

○NSns2.namebrightdns.com2016-09-19 → 2019-02-22 · 5 obs

○ 2016-06-06 19:23:40
● 2016-09-19 19:52:46
● 2019-02-22 02:09:48
○ 2026-02-15 02:59:36
○ 2026-07-22 09:30:40

●MXalt1.aspmx.l.google.com2026-02-15 → 2026-07-22 · 3 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
● 2026-07-22 09:30:40

●MXalt2.aspmx.l.google.com2026-02-15 → 2026-07-22 · 3 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
● 2026-07-22 09:30:40

●MXalt3.aspmx.l.google.com2026-02-15 → 2026-07-22 · 3 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
● 2026-07-22 09:30:40

●MXalt4.aspmx.l.google.com2026-02-15 → 2026-07-22 · 3 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
● 2026-07-22 09:30:40

●MXaspmx.l.google.com2026-02-15 → 2026-07-22 · 3 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
● 2026-07-22 09:30:40

○MXclassum.com2015-06-13 → 2015-06-13 · 3 obs

● 2015-06-13 03:20:22
○ 2015-09-15 22:49:16
○ 2026-07-22 09:30:40

○MXdc-75ba24df.classum.com2015-09-15 → 2016-03-14 · 5 obs

○ 2015-06-13 03:20:22
● 2015-09-15 22:49:16
● 2016-03-14 11:46:20
○ 2016-06-06 19:23:40
○ 2026-07-22 09:30:40

○MXmail1.namebrightmail.com2019-02-22 → 2019-02-22 · 4 obs

○ 2016-06-06 19:23:40
● 2019-02-22 02:09:48
○ 2026-02-15 02:59:36
○ 2026-07-22 09:30:40

○MXmail2.namebrightmail.com2019-02-22 → 2019-02-22 · 4 obs

○ 2016-06-06 19:23:40
● 2019-02-22 02:09:48
○ 2026-02-15 02:59:36
○ 2026-07-22 09:30:40

○A104.31.78.1342015-09-15 → 2016-03-14 · 5 obs

○ 2015-06-13 03:20:22
● 2015-09-15 22:49:16
● 2016-03-14 11:46:20
○ 2016-06-06 19:23:40
○ 2026-07-22 09:30:40

○A104.31.79.1342015-09-15 → 2016-03-14 · 5 obs

○ 2015-06-13 03:20:22
● 2015-09-15 22:49:16
● 2016-03-14 11:46:20
○ 2016-06-06 19:23:40
○ 2026-07-22 09:30:40

○A107.23.198.2402016-09-19 → 2016-09-19 · 4 obs

○ 2016-06-06 19:23:40
● 2016-09-19 19:52:46
○ 2016-11-25 17:48:14
○ 2026-07-22 09:30:40

○A13.113.70.2022026-02-15 → 2026-02-16 · 5 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
● 2026-02-16 04:08:22
○ 2026-03-18 12:25:08
○ 2026-07-22 09:30:40

○A13.114.56.1152026-03-18 → 2026-03-18 · 4 obs

○ 2026-02-16 04:08:22
● 2026-03-18 12:25:08
○ 2026-03-31 16:10:30
○ 2026-07-22 09:30:40

○A13.115.162.792026-07-04 → 2026-07-04 · 4 obs

○ 2026-04-12 15:45:22
● 2026-07-04 18:19:42
○ 2026-07-17 16:50:40
○ 2026-07-22 09:30:40

○A13.192.105.2342026-03-18 → 2026-03-18 · 4 obs

○ 2026-02-16 04:08:22
● 2026-03-18 12:25:08
○ 2026-03-31 16:10:30
○ 2026-07-22 09:30:40

○A13.230.211.1802026-03-31 → 2026-03-31 · 4 obs

○ 2026-03-18 12:25:08
● 2026-03-31 16:10:30
○ 2026-04-07 22:17:30
○ 2026-07-22 09:30:40

○A151.101.1.1952019-02-22 → 2019-02-22 · 4 obs

○ 2016-12-03 02:26:34
● 2019-02-22 02:09:48
○ 2026-02-15 02:59:36
○ 2026-07-22 09:30:40

○A151.101.65.1952019-02-22 → 2019-02-22 · 4 obs

○ 2016-12-03 02:26:34
● 2019-02-22 02:09:48
○ 2026-02-15 02:59:36
○ 2026-07-22 09:30:40

○A16.76.128.2052026-04-07 → 2026-04-12 · 5 obs

○ 2026-03-31 16:10:30
● 2026-04-07 22:17:30
● 2026-04-12 15:45:22
○ 2026-07-04 18:19:42
○ 2026-07-22 09:30:40

●A16.76.4.832026-07-22 → 2026-07-22 · 2 obs

○ 2026-07-17 16:50:40
● 2026-07-22 09:30:40

○A18.176.237.1812026-07-04 → 2026-07-04 · 4 obs

○ 2026-04-12 15:45:22
● 2026-07-04 18:19:42
○ 2026-07-09 11:45:40
○ 2026-07-22 09:30:40

○A18.180.15.1332026-03-31 → 2026-03-31 · 4 obs

○ 2026-03-18 12:25:08
● 2026-03-31 16:10:30
○ 2026-04-07 22:17:30
○ 2026-07-22 09:30:40

○A18.180.153.492026-07-17 → 2026-07-17 · 3 obs

○ 2026-07-09 11:45:40
● 2026-07-17 16:50:40
○ 2026-07-22 09:30:40

○A204.197.244.142015-06-13 → 2015-06-13 · 3 obs

● 2015-06-13 03:20:22
○ 2015-09-15 22:49:16
○ 2026-07-22 09:30:40

○A35.74.88.952026-02-15 → 2026-02-15 · 4 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
○ 2026-02-16 04:08:22
○ 2026-07-22 09:30:40

○A35.79.30.842026-07-04 → 2026-07-04 · 4 obs

○ 2026-04-12 15:45:22
● 2026-07-04 18:19:42
○ 2026-07-17 16:50:40
○ 2026-07-22 09:30:40

○A43.206.30.1252026-03-31 → 2026-04-07 · 5 obs

○ 2026-03-18 12:25:08
● 2026-03-31 16:10:30
● 2026-04-07 22:17:30
○ 2026-04-12 03:21:58
○ 2026-07-22 09:30:40

○A52.192.235.1962026-07-09 → 2026-07-09 · 3 obs

○ 2026-07-04 18:19:42
● 2026-07-09 11:45:40
○ 2026-07-22 09:30:40

○A52.193.69.2362026-02-15 → 2026-02-16 · 5 obs

○ 2019-02-22 02:09:48
● 2026-02-15 02:59:36
● 2026-02-16 04:08:22
○ 2026-03-18 12:25:08
○ 2026-07-22 09:30:40

●A52.195.76.612026-07-22 → 2026-07-22 · 2 obs

○ 2026-07-17 16:50:40
● 2026-07-22 09:30:40

○A52.199.136.1532026-04-07 → 2026-04-12 · 5 obs

○ 2026-03-31 16:10:30
● 2026-04-07 22:17:30
● 2026-04-12 15:45:22
○ 2026-07-04 18:19:42
○ 2026-07-22 09:30:40

○A52.206.43.2342016-09-19 → 2016-09-19 · 4 obs

○ 2016-06-06 19:23:40
● 2016-09-19 19:52:46
○ 2016-11-25 17:48:14
○ 2026-07-22 09:30:40

○A52.4.32.832016-11-30 → 2016-11-30 · 4 obs

○ 2016-11-27 09:21:32
● 2016-11-30 11:27:06
○ 2016-12-02 01:17:46
○ 2026-07-22 09:30:40

○A52.4.72.1372016-09-19 → 2016-09-19 · 4 obs

○ 2016-06-06 19:23:40
● 2016-09-19 19:52:46
○ 2016-11-25 17:48:14
○ 2026-07-22 09:30:40

○A52.5.157.2202016-12-02 → 2016-12-02 · 4 obs

○ 2016-11-30 11:27:06
● 2016-12-02 01:17:46
○ 2016-12-03 02:26:34
○ 2026-07-22 09:30:40

○A52.54.177.2062016-11-30 → 2016-11-30 · 4 obs

○ 2016-11-27 09:21:32
● 2016-11-30 11:27:06
○ 2016-12-02 01:17:46
○ 2026-07-22 09:30:40

●A52.68.18.892026-07-17 → 2026-07-22 · 3 obs

○ 2026-07-09 11:45:40
● 2026-07-17 16:50:40
● 2026-07-22 09:30:40

○A54.150.213.1082026-03-18 → 2026-03-18 · 4 obs

○ 2026-02-16 04:08:22
● 2026-03-18 12:25:08
○ 2026-03-31 16:10:30
○ 2026-07-22 09:30:40

○A54.168.73.1622026-02-16 → 2026-02-16 · 4 obs

○ 2026-02-15 02:59:36
● 2026-02-16 04:08:22
○ 2026-03-18 12:25:08
○ 2026-07-22 09:30:40

○A54.210.33.1902016-09-19 → 2016-09-19 · 4 obs

○ 2016-06-06 19:23:40
● 2016-09-19 19:52:46
○ 2016-11-25 17:48:14
○ 2026-07-22 09:30:40

○A54.236.123.2242016-09-19 → 2016-09-19 · 4 obs

○ 2016-06-06 19:23:40
● 2016-09-19 19:52:46
○ 2016-11-25 17:48:14
○ 2026-07-22 09:30:40

○A54.249.80.1662026-04-12 → 2026-04-12 · 5 obs

○ 2026-04-07 22:17:30
● 2026-04-12 03:21:58
● 2026-04-12 15:45:22
○ 2026-07-04 18:19:42
○ 2026-07-22 09:30:40

○A54.84.53.382016-12-02 → 2016-12-02 · 4 obs

○ 2016-11-30 11:27:06
● 2016-12-02 01:17:46
○ 2016-12-03 02:26:34
○ 2026-07-22 09:30:40

○A54.84.80.1732016-11-25 → 2016-12-03 · 8 obs

○ 2016-09-19 19:52:46
● 2016-11-25 17:48:14
● 2016-11-27 09:21:32
○ 2016-11-30 11:27:06
○ 2016-12-02 01:17:46
● 2016-12-03 02:26:34
○ 2019-02-22 02:09:48
○ 2026-07-22 09:30:40

○A54.88.107.1402016-11-25 → 2016-12-03 · 8 obs

○ 2016-09-19 19:52:46
● 2016-11-25 17:48:14
● 2016-11-27 09:21:32
○ 2016-11-30 11:27:06
○ 2016-12-02 01:17:46
● 2016-12-03 02:26:34
○ 2019-02-22 02:09:48
○ 2026-07-22 09:30:40

○CNAMEhdredirect-lb-399551664.us-east-1.elb.amazonaws.com2016-09-19 → 2016-09-19 · 3 obs

● 2016-09-19 19:52:46
○ 2016-11-25 17:48:14
○ 2026-07-22 09:30:40

○CNAMEhdredirect-lb3-890977680.us-east-1.elb.amazonaws.com2016-11-25 → 2016-12-03 · 5 obs

○ 2016-09-19 19:52:46
● 2016-11-25 17:48:14
● 2016-12-03 02:26:34
○ 2019-02-22 02:09:48
○ 2026-07-22 09:30:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
classum.com	ns-547.awsdns-04.net, ns-373.awsdns-46.com, ns-1071.awsdns-05.org, ns-1946.awsdns-51.co.uk	2 records

✅ Authoritative Response

Server:205.251.193.117

NS records: ns-547.awsdns-04.net, ns-373.awsdns-46.com, ns-1071.awsdns-05.org, ns-1946.awsdns-51.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classum.com (unsigned zone)

⏱️ Timing

Total: 672ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`16.76.4.83, 52.195.76.61...`
NS	4	`ns-1071.awsdns-05.org, ns-1946.awsdns-51.co.uk...`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	8	`MS=ms93791466, anthropic-domain-verification-qrrq5a=j0E...`
SOA	1	`ns-373.awsdns-46.com awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-373.awsdns-46.com, ns-373.awsdns-46.com)

Analysis

Hierarchy

The domain classum.com is parent to drm-proxy.classum.com, api.classum.com and cdn.classum.com.

IP Addresses

classum.com points to three IP numbers, namely 16.76.4.83, 52.68.18.89 and 52.195.76.61.

There are other host names — ec2-52-68-18-89.ap-northeast-1.compute.amazonaws.com among them — that share IP numbers with classum.com.

Name Servers

The NS records for classum.com point to four name servers: ns-373.awsdns-46.com, ns-547.awsdns-04.net, ns-1071.awsdns-05.org and ns-1946.awsdns-51.co.uk.

At least some of classum.com's name servers are shared with other domains, for example libraryplaces.com, gloriajeans.ca, keepingyouinformed.com and two more.

These name servers tend to be deployed in combination with the name servers ns-1159.awsdns-16.org and ns-15.awsdns-01.com.

Four hostnames, each resolving to a pair of IP addresses: ns-373.awsdns-46.com directs to 205.251.193.117 and 2600:9000:5301:7500::1; ns-547.awsdns-04.net directs to 205.251.194.35 and 2600:9000:5302:2300::1; ns-1071.awsdns-05.org directs to 205.251.196.47 and 2600:9000:5304:2f00::1; ns-1946.awsdns-51.co.uk directs to 205.251.199.154 and 2600:9000:5307:9a00::1.

Mail Servers

classum.com has five mail servers, which are aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

There is at least a partial MX overlap between classum.com and other domains, including purplegatedesign.com, ns500765.ns500734.ns500734.ns500734.ns500693.ns500588.ns500612.ns500632.ns500588.ns500110.dtrkdll.com, ns500698.ns500698.ns500698.ns500698.ns500698.ns500698.ns500735.ns500698.ns500736.ns500708.ns500736.ns500576.ns500698.ns500576.ns500619.ns500698.trackreceptor.com and two others.

alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and aspmx3.googlemail.com are mail servers that frequently appear together with these mail servers.

Host names that have two IP addresses:

aspmx.l.google.com has two IP addresses: 142.251.111.27 and 2607:f8b0:4004:c08::1a.

alt1.aspmx.l.google.com has two IP addresses: 108.177.123.27 and 2800:3f0:4003:c0f::1a.

alt2.aspmx.l.google.com has two IP addresses: 172.253.116.27 and 2a00:1450:400b:c02::1b.

alt3.aspmx.l.google.com has two IP addresses: 192.178.223.27 and 2a00:1450:4009:c0f::1b.

alt4.aspmx.l.google.com has two IP addresses: 172.253.157.26 and 2a00:1450:400c:c23::1a.