classmanager.com - dns.ninja

`classmanager.com`

DNSSEC	⚠️ Not signed
A	2606:4700:20::681a:428^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:20::681a:528^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:20::ac43:4886^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.26.4.40^{Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.26.5.40^{Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.72.134^{🇺🇸 Cloudflare172.67.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`arch.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b44^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arch.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c144^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`arch.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2144^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`arch.ns.cloudflare.com`
		A	108.162.193.68^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arch.ns.cloudflare.com`
		A	172.64.33.68^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arch.ns.cloudflare.com`
		A	173.245.59.68^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arch.ns.cloudflare.com`
NS	`hera.ns.cloudflare.com`
		A	2606:4700:50::adf5:3aa2^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hera.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0a2^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`hera.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20a2^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`hera.ns.cloudflare.com`
		A	108.162.192.162^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hera.ns.cloudflare.com`
		A	172.64.32.162^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hera.ns.cloudflare.com`
		A	173.245.58.162^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hera.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c07::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bc-in-f27.1e100.net`
		A	172.253.115.27^{🇺🇸 Google172.253.115.0/24}
			PTR	`bg-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 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	172.253.116.26^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f26.1e100.net`
MX	`aspmx2.googlemail.com`⁽¹⁰⁾
		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	`aspmx3.googlemail.com`⁽¹⁰⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
TXT	`facebook-domain-verification=gmsvt7yum6q90akx52vavl2wp02pw3`
TXT	`google-site-verification=63Nr9D1V1dNV2jQQKTxwMIFHPXRWHC-1MlKh_gdjITA`
TXT	`google-site-verification=FvvmfEqDjbD8UeNgzGQYRweWB0yifey5LoWjUGf6Wu8`
TXT	`v=spf1 include:_spf.google.com include:amazonses.com include:139761362.spf04....`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.26.4.40, 104.26.5.40, 172.67.72.134
		IPv6 hints	2606:4700:20::681a:428, 2606:4700:20::681a:528, 2606:4700:20::ac43:4886
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=62, name=cloudflare-ech.com
SOA	`arch.ns.cloudflare.com`dns@cloudflare.com serial=2411371378

`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=1786068234

rank #386391 globally
rank #158657 in the tld
📈 Tranco rank: #153,508

Subdomains

dev.classmanager.com

help.classmanager.com

app.classmanager.com

Same first word

classmanager.io

classmanager.academy

classmanager.com

classmanager.de

DNS History

30 records (13 active, 17 former)

●NSarch.ns.cloudflare.com2020-03-01 → 2026-08-07 · 3 obs

○ 2017-04-19 04:25:16
● 2020-03-01 07:52:54
● 2026-08-07 02:29:12

○NSauthns1.qwest.net2015-07-03 → 2015-12-19 · 4 obs

● 2015-07-03 08:45:10
● 2015-12-19 14:46:18
○ 2016-07-11 17:15:46
○ 2026-08-07 02:29:12

○NSauthns2.qwest.net2015-07-03 → 2015-12-19 · 5 obs

● 2015-07-03 08:45:10
○ 2015-12-04 05:03:02
● 2015-12-19 14:46:18
○ 2016-07-11 17:15:46
○ 2026-08-07 02:29:12

●NShera.ns.cloudflare.com2020-03-01 → 2026-08-07 · 3 obs

○ 2017-04-19 04:25:16
● 2020-03-01 07:52:54
● 2026-08-07 02:29:12

○NSlocalhost2016-07-11 → 2017-04-19 · 5 obs

○ 2015-12-19 14:46:18
● 2016-07-11 17:15:46
● 2017-04-19 04:25:16
○ 2020-03-01 07:52:54
○ 2026-08-07 02:29:12

○NSns1.mytrafficmanagement.com2016-07-11 → 2017-04-19 · 5 obs

○ 2015-12-19 14:46:18
● 2016-07-11 17:15:46
● 2017-04-19 04:25:16
○ 2020-03-01 07:52:54
○ 2026-08-07 02:29:12

○NSns2.mytrafficmanagement.com2016-07-11 → 2017-04-19 · 5 obs

○ 2015-12-19 14:46:18
● 2016-07-11 17:15:46
● 2017-04-19 04:25:16
○ 2020-03-01 07:52:54
○ 2026-08-07 02:29:12

●MXalt1.aspmx.l.google.com2020-03-01 → 2026-08-07 · 3 obs

○ 2017-04-19 04:25:16
● 2020-03-01 07:52:54
● 2026-08-07 02:29:12

●MXalt2.aspmx.l.google.com2020-03-01 → 2026-08-07 · 3 obs

○ 2017-04-19 04:25:16
● 2020-03-01 07:52:54
● 2026-08-07 02:29:12

●MXaspmx.l.google.com2020-03-01 → 2026-08-07 · 3 obs

○ 2017-04-19 04:25:16
● 2020-03-01 07:52:54
● 2026-08-07 02:29:12

●MXaspmx2.googlemail.com2020-03-01 → 2026-08-07 · 3 obs

○ 2017-04-19 04:25:16
● 2020-03-01 07:52:54
● 2026-08-07 02:29:12

●MXaspmx3.googlemail.com2020-03-01 → 2026-08-07 · 3 obs

○ 2017-04-19 04:25:16
● 2020-03-01 07:52:54
● 2026-08-07 02:29:12

○MXmail.b-io.co2016-03-14 → 2016-03-14 · 4 obs

○ 2015-12-19 14:46:18
● 2016-03-14 10:25:50
○ 2016-07-11 17:15:46
○ 2026-08-07 02:29:12

○MXmail.classmanager.com2015-07-03 → 2015-12-19 · 4 obs

● 2015-07-03 08:45:10
● 2015-12-19 14:46:18
○ 2016-03-14 10:25:50
○ 2026-08-07 02:29:12

○MXmail.pickelhost.com2017-04-19 → 2017-04-19 · 4 obs

○ 2016-07-11 17:15:46
● 2017-04-19 04:25:16
○ 2020-03-01 07:52:54
○ 2026-08-07 02:29:12

○A104.237.142.2452017-04-19 → 2017-04-19 · 4 obs

○ 2016-07-11 17:15:46
● 2017-04-19 04:25:16
○ 2020-03-01 07:52:54
○ 2026-08-07 02:29:12

●A104.26.4.402026-02-16 → 2026-08-07 · 3 obs

○ 2020-03-01 07:52:54
● 2026-02-16 16:55:48
● 2026-08-07 02:29:12

●A104.26.5.402026-02-16 → 2026-08-07 · 3 obs

○ 2020-03-01 07:52:54
● 2026-02-16 16:55:48
● 2026-08-07 02:29:12

○A104.27.134.2162020-03-01 → 2020-03-01 · 4 obs

○ 2017-04-19 04:25:16
● 2020-03-01 07:52:54
○ 2026-02-16 16:55:48
○ 2026-08-07 02:29:12

○A104.27.135.2162020-03-01 → 2020-03-01 · 4 obs

○ 2017-04-19 04:25:16
● 2020-03-01 07:52:54
○ 2026-02-16 16:55:48
○ 2026-08-07 02:29:12

●A172.67.72.1342026-02-16 → 2026-08-07 · 3 obs

○ 2020-03-01 07:52:54
● 2026-02-16 16:55:48
● 2026-08-07 02:29:12

○A192.230.66.932016-07-11 → 2016-07-11 · 4 obs

○ 2016-03-14 10:25:50
● 2016-07-11 17:15:46
○ 2017-04-19 04:25:16
○ 2026-08-07 02:29:12

○A192.230.74.932016-07-11 → 2016-07-11 · 4 obs

○ 2016-03-14 10:25:50
● 2016-07-11 17:15:46
○ 2017-04-19 04:25:16
○ 2026-08-07 02:29:12

○A208.91.197.1322016-03-14 → 2016-03-14 · 4 obs

○ 2015-12-19 14:46:18
● 2016-03-14 10:25:50
○ 2016-07-11 17:15:46
○ 2026-08-07 02:29:12

●A2606:4700:20::681a:4282026-02-16 → 2026-08-07 · 3 obs

○ 2020-03-01 07:52:54
● 2026-02-16 16:55:48
● 2026-08-07 02:29:12

●A2606:4700:20::681a:5282026-02-16 → 2026-08-07 · 3 obs

○ 2020-03-01 07:52:54
● 2026-02-16 16:55:48
● 2026-08-07 02:29:12

●A2606:4700:20::ac43:48862026-02-16 → 2026-08-07 · 3 obs

○ 2020-03-01 07:52:54
● 2026-02-16 16:55:48
● 2026-08-07 02:29:12

○A2606:4700:3034::681b:86d82020-03-01 → 2020-03-01 · 4 obs

○ 2017-04-19 04:25:16
● 2020-03-01 07:52:54
○ 2026-02-16 16:55:48
○ 2026-08-07 02:29:12

○A2606:4700:3036::681b:87d82020-03-01 → 2020-03-01 · 4 obs

○ 2017-04-19 04:25:16
● 2020-03-01 07:52:54
○ 2026-02-16 16:55:48
○ 2026-08-07 02:29:12

○A65.126.203.812015-07-03 → 2015-12-19 · 4 obs

● 2015-07-03 08:45:10
● 2015-12-19 14:46:18
○ 2016-03-14 10:25:50
○ 2026-08-07 02:29:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net...	-
classmanager.com	hera.ns.cloudflare.com, arch.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.162

NS records: hera.ns.cloudflare.com, arch.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 252ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`172.67.72.134, 104.26.5.40...`
AAAA	3	`2606:4700:20::681a:428, 2606:4700:20::ac43:4886...`
NS	2	`arch.ns.cloudflare.com, hera.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)...`
TXT	4	`facebook-domain-verification=gmsvt7yum6q, google-site-verification=63Nr9D1V1dNV2jQ...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`arch.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (hera.ns.cloudflare.com, hera.ns.cloudflare.com, hera.ns.cloudflare.com...)

Analysis

Hierarchy

classmanager.com sits above dev.classmanager.com, help.classmanager.com and app.classmanager.com in the domain hierarchy.

IP Addresses

classmanager.com points to 6 IP addresses, including 104.26.4.40, 104.26.5.40 and 172.67.72.134, plus 3 other.

alleaktien.de, www.hugginsandscott.com, healthforms.io plus two other host names have IP numbers in common with classmanager.com.

Name Servers

DNS delegation for classmanager.com points to two name servers: arch.ns.cloudflare.com and hera.ns.cloudflare.com.

The name server configuration of classmanager.com is shared with other domains, for instance synthetic-device.com, classmanager.io, sharestockexchange.com and two others.

There is at least partial name server overlap between classmanager.com and other domains — ordicu.com, highspeedcableinternet.com, massstruggle.com and two more among them.

These name servers frequently co-occur with the name servers bart.ns.cloudflare.com and pranab.ns.cloudflare.com.

Hosts with 6 IP addresses each:

arch.ns.cloudflare.com has IP addresses 108.162.193.68, 172.64.33.68 and 173.245.59.68, plus 3 other.

hera.ns.cloudflare.com has IP addresses 108.162.192.162, 172.64.32.162 and 173.245.58.162, plus 3 other.

Mail Servers

Five mail servers handle classmanager.com: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.

At least some of the mail servers used by classmanager.com are shared with other domains: ns500731.ns500671.ns500754.ns500742.ns500754.ns500704.ns500705.ns500705.ns500704.ns500671.ns500666.ns500291.ns500131.lustychickser.com, ns500765.ns500699.ns500693.ns500734.ns500699.ns500699.ns500632.ns500612.ns500632.ns500632.ns500588.ns500578.ns500110.dtrkdll.com, ns500698.ns500759.ns500758.ns500698.ns500736.ns500736.ns500698.ns500698.ns500698.ns500735.ns500698.ns500698.ns500686.ns500576.ns500619.ns500576.trackreceptor.com and two others among them.

These mail servers are often deployed together with alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 other mail servers.

Host names pointing to two IP addresses:

aspmx2.googlemail.com has two IP addresses: 108.177.123.27 and 2800:3f0:4003:c0f::1a.

aspmx3.googlemail.com has two IP addresses: 172.253.116.27 and 2a00:1450:400b:c02::1a.

aspmx.l.google.com has two IP addresses: 172.253.115.27 and 2607:f8b0:4004:c07::1b.

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

alt2.aspmx.l.google.com has two IP addresses: 172.253.116.26 and 2a00:1450:400b:c02::1b.

Host names pointing to 108.177.123.27 IP addresses: aspmx2.googlemail.com and alt1.aspmx.l.google.com.