classcentral.com - dns.ninja

`classcentral.com`

DNSSEC	⚠️ Not signed
A	2606:4700:10::6814:1fe9^{🇺🇸 Cloudflare2606:4700:10::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:10::ac42:9b5f^{🇺🇸 Cloudflare2606:4700:10::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.20.31.233^{Cloudflare104.20.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.66.155.95^{🇺🇸 Cloudflare172.66.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`arely.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:26a4^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arely.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2a4^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`arely.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22a4^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`arely.ns.cloudflare.com`
		A	108.162.194.164^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arely.ns.cloudflare.com`
		A	162.159.38.164^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arely.ns.cloudflare.com`
		A	172.64.34.164^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arely.ns.cloudflare.com`
NS	`cash.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b51^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cash.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c151^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`cash.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2151^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`cash.ns.cloudflare.com`
		A	108.162.193.81^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cash.ns.cloudflare.com`
		A	172.64.33.81^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cash.ns.cloudflare.com`
		A	173.245.59.81^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cash.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c23::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadrs-in-f27.1e100.net`
		A	192.178.155.26^{🇺🇸 Google192.178.155.0/24}
			PTR	`yuiadrs-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c14::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	192.178.234.26^{🇺🇸 Google192.178.0.0/15}
			PTR	`ncsclj-in-f26.1e100.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	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1a^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f26.1e100.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	`ahrefs-site-verification_66d70d81cc769a17be729ca86b4b78a154ce5bdf05a959a3e24f...`
TXT	`google-site-verification=B5tS98xLS8LWKgF0jvgFT1ZMVFKHu2x2Bm1dDUkfZok`
TXT	`google-site-verification=MVj1x00m2Sfy8hd2NKzae4A9vNUeb56LeY8lbrCFFMw`
TXT	`google-site-verification=nti5KS3pWsqPVSly62k9EXN_K_20_cnQL9dJ0l7HAh0`
TXT	`prowly-verification=b4b5eac2db73d1bf8336e0c31c0ad569d48bca13aa333785f3fc205c9...`
TXT	`v=spf1 include:_spf.google.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.20.31.233, 172.66.155.95
		IPv6 hints	2606:4700:10::6814:1fe9, 2606:4700:10::ac42:9b5f
SOA	`arely.ns.cloudflare.com`dns@cloudflare.com serial=2409640016

`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=1786388719

rank #12953 globally
rank #6257 in the tld
📈 Tranco rank: #27,040

Subdomains

www.classcentral.com

Same first word

classcentral.net

classcentral.org

classcentral.com

Similar names

centralclass.com

DNS History

15 records (11 active, 4 former)

●NSarely.ns.cloudflare.com2026-02-16 → 2026-08-10 · 3 obs

○ 2016-12-07 01:22:10
● 2026-02-16 07:34:54
● 2026-08-10 19:33:52

●NScash.ns.cloudflare.com2026-02-16 → 2026-08-10 · 3 obs

○ 2016-12-07 01:22:10
● 2026-02-16 07:34:54
● 2026-08-10 19:33:52

○NSns1.classcentral.com2015-07-03 → 2016-12-07 · 4 obs

● 2015-07-03 09:02:28
● 2016-12-07 01:22:10
○ 2026-02-16 07:34:54
○ 2026-08-10 19:33:52

○NSns2.classcentral.com2015-07-03 → 2016-12-07 · 4 obs

● 2015-07-03 09:02:28
● 2016-12-07 01:22:10
○ 2026-02-16 07:34:54
○ 2026-08-10 19:33:52

●MXalt1.aspmx.l.google.com2026-02-16 → 2026-08-10 · 3 obs

○ 2016-12-07 01:22:10
● 2026-02-16 07:34:54
● 2026-08-10 19:33:52

●MXalt2.aspmx.l.google.com2026-02-16 → 2026-08-10 · 3 obs

○ 2016-12-07 01:22:10
● 2026-02-16 07:34:54
● 2026-08-10 19:33:52

●MXalt3.aspmx.l.google.com2026-02-16 → 2026-08-10 · 3 obs

○ 2016-12-07 01:22:10
● 2026-02-16 07:34:54
● 2026-08-10 19:33:52

●MXalt4.aspmx.l.google.com2026-02-16 → 2026-08-10 · 3 obs

○ 2016-12-07 01:22:10
● 2026-02-16 07:34:54
● 2026-08-10 19:33:52

●MXaspmx.l.google.com2026-02-16 → 2026-08-10 · 3 obs

○ 2016-12-07 01:22:10
● 2026-02-16 07:34:54
● 2026-08-10 19:33:52

○MXmail.classcentral.com2015-07-03 → 2016-12-07 · 4 obs

● 2015-07-03 09:02:28
● 2016-12-07 01:22:10
○ 2026-02-16 07:34:54
○ 2026-08-10 19:33:52

●A104.20.31.2332026-02-16 → 2026-08-10 · 3 obs

○ 2016-12-07 01:22:10
● 2026-02-16 07:34:54
● 2026-08-10 19:33:52

●A172.66.155.952026-02-16 → 2026-08-10 · 3 obs

○ 2016-12-07 01:22:10
● 2026-02-16 07:34:54
● 2026-08-10 19:33:52

●A2606:4700:10::6814:1fe92026-02-16 → 2026-08-10 · 3 obs

○ 2016-12-07 01:22:10
● 2026-02-16 07:34:54
● 2026-08-10 19:33:52

●A2606:4700:10::ac42:9b5f2026-02-16 → 2026-08-10 · 3 obs

○ 2016-12-07 01:22:10
● 2026-02-16 07:34:54
● 2026-08-10 19:33:52

○A75.103.109.2252015-07-03 → 2016-12-07 · 4 obs

● 2015-07-03 09:02:28
● 2016-12-07 01:22:10
○ 2026-02-16 07:34:54
○ 2026-08-10 19:33:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, k.gtld-servers.net, f.gtld-servers.net, m.gtld-servers.net...	-
classcentral.com	cash.ns.cloudflare.com, arely.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.81

NS records: cash.ns.cloudflare.com, arely.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classcentral.com (unsigned zone)

⏱️ Timing

Total: 140ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.20.31.233, 172.66.155.95`
AAAA	2	`2606:4700:10::ac42:9b5f, 2606:4700:10::6814:1fe9`
NS	2	`arely.ns.cloudflare.com, cash.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	6	`ahrefs-site-verification_66d70d81cc769a1, google-site-verification=B5tS98xLS8LWKgF...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`arely.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

classcentral.com is the parent zone for www.classcentral.com.

IP Addresses

classcentral.com resolves to four IP addresses: 104.20.31.233, 172.66.155.95, 2606:4700:10::6814:1fe9 and 2606:4700:10::ac42:9b5f.

cygnusscan-dnfbp.crowe.ae.cdn.cloudflare.net, www.richardblumenthal.com, savitarna.miestogijos.lt and two other host names share IP numbers with classcentral.com.

Name Servers

DNS delegation for classcentral.com points to two name servers: arely.ns.cloudflare.com and cash.ns.cloudflare.com.

classcentral.com uses the same name servers as several other domains — among them silversquare.co.in, etsltd.co.uk, treinamentolinux.com.br and two more.

classcentral.com partially shares its NS delegation with several other domains, including flora-crimea.ru, nxzhgl.com, poshmaal.org and two others.

These name servers often co-occur with the name servers jerome.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

arely.ns.cloudflare.com has IP addresses 108.162.194.164, 162.159.38.164 and 172.64.34.164, plus 3 other.

cash.ns.cloudflare.com has IP addresses 108.162.193.81, 172.64.33.81 and 173.245.59.81, plus 3 other.

Mail Servers

classcentral.com is handled by five mail servers: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

classcentral.com has at least partial mail server overlap with other domains such as matthewlloyd.co.uk, recoequip.net, pingtheory.net and two more.

These mail servers commonly co-occur with mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and 3 others.

Hostnames that resolve to two IP addresses:

aspmx.l.google.com has two IP addresses: 192.178.155.26 and 2607:f8b0:4004:c23::1b.

alt1.aspmx.l.google.com has two IP addresses: 192.178.234.26 and 2800:3f0:4003:c14::1b.

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

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

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