classstart.org - dns.ninja

`classstart.org`

DNSSEC	⚠️ Not signed
A	2606:4700:20::681a:2f9^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:20::681a:3f9^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:20::ac43:4933^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.26.2.249^{Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.26.3.249^{Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.73.51^{🇺🇸 Cloudflare172.67.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`isla.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a77^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isla.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c077^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`isla.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2077^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`isla.ns.cloudflare.com`
		A	108.162.192.119^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isla.ns.cloudflare.com`
		A	172.64.32.119^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isla.ns.cloudflare.com`
		A	173.245.58.119^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isla.ns.cloudflare.com`
NS	`walt.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b94^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`walt.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c194^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`walt.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2194^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`walt.ns.cloudflare.com`
		A	108.162.193.148^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`walt.ns.cloudflare.com`
		A	172.64.33.148^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`walt.ns.cloudflare.com`
		A	173.245.59.148^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`walt.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c1d::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`ww-in-f27.1e100.net`
		A	64.233.180.26^{🇺🇸 Google64.233.180.0/24}
			PTR	`on-in-f26.1e100.net`
			PTR	`pe-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		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`
MX	`aspmx2.googlemail.com`⁽¹⁰⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`aspmx3.googlemail.com`⁽¹⁰⁾
		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`
TXT	`google-site-verification=tVZONXRu4mGwpcLUoeGrinayWu7ed5lCAOvNS4WdQlA`
TXT	`google-site-verification=xJ3feCM_7e6TyWdTqbnM3-XMtToc55nNsT2GAiviMlY`
TXT	`v=spf1 a mx ip4:139.59.233.87 include:amazonses.com -all`
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	104.26.2.249, 104.26.3.249, 172.67.73.51
		IPv6 hints	2606:4700:20::681a:2f9, 2606:4700:20::681a:3f9, 2606:4700:20::ac43:4933
SOA	`isla.ns.cloudflare.com`dns@cloudflare.com serial=2409165522

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1783935916

rank #637630 globally
rank #48605 in the tld
📈 Tranco rank: #931,860

Subdomains

books.classstart.org

Same first word

classstart.org

Similar names

startclass.nl

startclass.com

startclass.com.br

DNS History

23 records (13 active, 10 former)

●NSisla.ns.cloudflare.com2015-08-12 → 2026-07-13 · 2 obs

● 2015-08-12 23:27:44
● 2026-07-13 10:07:02

●NSwalt.ns.cloudflare.com2015-08-12 → 2026-07-13 · 2 obs

● 2015-08-12 23:27:44
● 2026-07-13 10:07:02

●MXalt1.aspmx.l.google.com2015-08-12 → 2026-07-13 · 2 obs

● 2015-08-12 23:27:44
● 2026-07-13 10:07:02

●MXalt2.aspmx.l.google.com2015-08-12 → 2026-07-13 · 2 obs

● 2015-08-12 23:27:44
● 2026-07-13 10:07:02

●MXaspmx.l.google.com2015-08-12 → 2026-07-13 · 2 obs

● 2015-08-12 23:27:44
● 2026-07-13 10:07:02

●MXaspmx2.googlemail.com2015-08-12 → 2026-07-13 · 2 obs

● 2015-08-12 23:27:44
● 2026-07-13 10:07:02

●MXaspmx3.googlemail.com2015-08-12 → 2026-07-13 · 2 obs

● 2015-08-12 23:27:44
● 2026-07-13 10:07:02

○A104.25.114.42017-03-30 → 2019-05-01 · 5 obs

○ 2016-07-22 21:04:54
● 2017-03-30 10:52:36
● 2019-05-01 09:01:42
○ 2026-02-15 12:35:12
○ 2026-07-13 10:07:02

○A104.25.115.42017-03-30 → 2019-05-01 · 5 obs

○ 2016-07-22 21:04:54
● 2017-03-30 10:52:36
● 2019-05-01 09:01:42
○ 2026-02-15 12:35:12
○ 2026-07-13 10:07:02

○A104.25.8.262015-12-07 → 2016-07-22 · 5 obs

○ 2015-08-12 23:27:44
● 2015-12-07 13:58:54
● 2016-07-22 21:04:54
○ 2017-03-30 10:52:36
○ 2026-07-13 10:07:02

○A104.25.9.262015-12-07 → 2016-07-22 · 5 obs

○ 2015-08-12 23:27:44
● 2015-12-07 13:58:54
● 2016-07-22 21:04:54
○ 2017-03-30 10:52:36
○ 2026-07-13 10:07:02

●A104.26.2.2492026-02-15 → 2026-07-13 · 3 obs

○ 2019-05-01 09:01:42
● 2026-02-15 12:35:12
● 2026-07-13 10:07:02

●A104.26.3.2492026-02-15 → 2026-07-13 · 3 obs

○ 2019-05-01 09:01:42
● 2026-02-15 12:35:12
● 2026-07-13 10:07:02

○A162.159.249.692015-08-12 → 2015-08-12 · 3 obs

● 2015-08-12 23:27:44
○ 2015-12-07 13:58:54
○ 2026-07-13 10:07:02

○A162.159.250.692015-08-12 → 2015-08-12 · 3 obs

● 2015-08-12 23:27:44
○ 2015-12-07 13:58:54
○ 2026-07-13 10:07:02

●A172.67.73.512026-02-15 → 2026-07-13 · 3 obs

○ 2019-05-01 09:01:42
● 2026-02-15 12:35:12
● 2026-07-13 10:07:02

○A2400:cb00:2048:1::6819:72042017-03-30 → 2017-03-30 · 4 obs

○ 2016-07-22 21:04:54
● 2017-03-30 10:52:36
○ 2019-05-01 09:01:42
○ 2026-07-13 10:07:02

○A2400:cb00:2048:1::6819:73042017-03-30 → 2017-03-30 · 4 obs

○ 2016-07-22 21:04:54
● 2017-03-30 10:52:36
○ 2019-05-01 09:01:42
○ 2026-07-13 10:07:02

○A2606:4700:20::6819:72042019-05-01 → 2019-05-01 · 4 obs

○ 2017-03-30 10:52:36
● 2019-05-01 09:01:42
○ 2026-02-15 12:35:12
○ 2026-07-13 10:07:02

○A2606:4700:20::6819:73042019-05-01 → 2019-05-01 · 4 obs

○ 2017-03-30 10:52:36
● 2019-05-01 09:01:42
○ 2026-02-15 12:35:12
○ 2026-07-13 10:07:02

●A2606:4700:20::681a:2f92026-02-15 → 2026-07-13 · 3 obs

○ 2019-05-01 09:01:42
● 2026-02-15 12:35:12
● 2026-07-13 10:07:02

●A2606:4700:20::681a:3f92026-02-15 → 2026-07-13 · 3 obs

○ 2019-05-01 09:01:42
● 2026-02-15 12:35:12
● 2026-07-13 10:07:02

●A2606:4700:20::ac43:49332026-02-15 → 2026-07-13 · 3 obs

○ 2019-05-01 09:01:42
● 2026-02-15 12:35:12
● 2026-07-13 10:07:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
classstart.org	isla.ns.cloudflare.com, walt.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.193.148

NS records: isla.ns.cloudflare.com, walt.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 282ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`104.26.2.249, 172.67.73.51...`
AAAA	3	`2606:4700:20::681a:2f9, 2606:4700:20::ac43:4933...`
NS	2	`isla.ns.cloudflare.com, walt.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)...`
TXT	3	`google-site-verification=tVZONXRu4mGwpcL, google-site-verification=xJ3feCM_7e6TyWd...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h2"]`
SOA	1	`isla.ns.cloudflare.com dns.cloudflare.co`

Analysis

Hierarchy

books.classstart.org is delegated beneath classstart.org.

IP Addresses

classstart.org has 6 IP addresses — 104.26.2.249, 104.26.3.249, 172.67.73.51 and 3 more.

media-static.sniffiesassets.com, effectdigital.com, bobw.co and two other host names share IP numbers with classstart.org.

Name Servers

classstart.org is delegated to two name servers: isla.ns.cloudflare.com and walt.ns.cloudflare.com.

classstart.org uses the same name servers as several other domains — among them assignmenthelper.ae, giaohangthantoc.com, moomooio.org and two more.

There is at least partial name server overlap between classstart.org and other domains — ajrd.com.pk, qinhuangdaozpw.com, thechicagodentist.net and two more among them.

These name servers frequently co-occur with the name servers kim.ns.cloudflare.com and scott.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

isla.ns.cloudflare.com resolves to 108.162.192.119, 172.64.32.119, 173.245.58.119 and 3 other IP addresses.

walt.ns.cloudflare.com resolves to 108.162.193.148, 172.64.33.148, 173.245.59.148 and 3 other IP addresses.

Mail Servers

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

classstart.org has at least partial mail server overlap with other domains such as brainvalley.jp, cro-mail.com, timesprofessionallearning.com.cdn.cloudflare.net and two more.

These mail servers commonly co-occur with mail servers alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 others.

Hostnames that resolve to two IP addresses:

aspmx2.googlemail.com points to 108.177.123.26 and 2800:3f0:4003:c0f::1a.

aspmx3.googlemail.com points to 172.253.116.27 and 2a00:1450:400b:c02::1b.

aspmx.l.google.com points to 64.233.180.26 and 2607:f8b0:4004:c1d::1b.

alt1.aspmx.l.google.com points to 108.177.123.26 and 2800:3f0:4003:c0f::1b.

alt2.aspmx.l.google.com points to 172.253.116.27 and 2a00:1450:400b:c02::1a.

aspmx2.googlemail.com and alt1.aspmx.l.google.com are host names that each point to 108.177.123.26 IP addresses.

aspmx3.googlemail.com and alt2.aspmx.l.google.com are host names that each point to 172.253.116.27 IP addresses.