classesbyemail.com - dns.ninja

`classesbyemail.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:252f^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:cbf4^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.37.47^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.203.244^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`april.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a42^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`april.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c042^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`april.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2042^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`april.ns.cloudflare.com`
		A	108.162.192.66^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`april.ns.cloudflare.com`
		A	172.64.32.66^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`april.ns.cloudflare.com`
		A	173.245.58.66^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`april.ns.cloudflare.com`
NS	`lars.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bc3^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lars.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1c3^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lars.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21c3^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lars.ns.cloudflare.com`
		A	108.162.193.195^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lars.ns.cloudflare.com`
		A	172.64.33.195^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lars.ns.cloudflare.com`
		A	173.245.59.195^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lars.ns.cloudflare.com`
MX	`classesbyemail-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c946::5^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-ch4pr21cu00105.inbound.protection.outlook.com`
		A	2a01:111:f403:f804::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-co1pr05cu00301.inbound.protection.outlook.com`
		A	2a01:111:f403:f902::2^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-mn2pr02cu00202.inbound.protection.outlook.com`
		A	2a01:111:f403:f90f::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sa9pr04cu00201.inbound.protection.outlook.com`
		A	52.101.8.34^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-dm2pr04cu00102.inbound.protection.outlook.com`
		A	52.101.8.44^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-dm5pr04cu00104.inbound.protection.outlook.com`
		A	52.101.9.11^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bl2pr04cu00103.inbound.protection.outlook.com`
		A	52.101.41.4^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sj2pr05cu00204.inbound.protection.outlook.com`
TXT	`MS=ms60734127`
TXT	`v=spf1 include:_spf.google.com include:outlook.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.37.47, 172.67.203.244
		IPv6 hints	2606:4700:3033::6815:252f, 2606:4700:3035::ac43:cbf4
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=222, name=cloudflare-ech.com
SOA	`april.ns.cloudflare.com`dns@cloudflare.com serial=2408820067

`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=1785728992

Same first word

classesbyemail.com

DNS History

17 records (7 active, 10 former)

●NSapril.ns.cloudflare.com2026-03-30 → 2026-08-03 · 3 obs

○ 2017-02-08 04:03:34
● 2026-03-30 22:45:24
● 2026-08-03 03:53:40

●NSlars.ns.cloudflare.com2026-03-30 → 2026-08-03 · 3 obs

○ 2017-02-08 04:03:34
● 2026-03-30 22:45:24
● 2026-08-03 03:53:40

○NSnet-serverns-1.computech-online.net2015-07-15 → 2017-02-08 · 5 obs

○ 2007-11-15 20:13:06
● 2015-07-15 02:54:30
● 2017-02-08 04:03:34
○ 2026-03-30 22:45:24
○ 2026-08-03 03:53:40

○NSns1.coredns.com2007-11-15 → 2017-02-08 · 4 obs

● 2007-11-15 20:13:06
● 2017-02-08 04:03:34
○ 2026-03-30 22:45:24
○ 2026-08-03 03:53:40

○NSns2.coredns.com2007-11-15 → 2017-02-08 · 4 obs

● 2007-11-15 20:13:06
● 2017-02-08 04:03:34
○ 2026-03-30 22:45:24
○ 2026-08-03 03:53:40

○NSns3.coredns.com2015-07-15 → 2017-02-08 · 5 obs

○ 2007-11-15 20:13:06
● 2015-07-15 02:54:30
● 2017-02-08 04:03:34
○ 2026-03-30 22:45:24
○ 2026-08-03 03:53:40

○NSns4.coredns.com2015-07-15 → 2017-02-08 · 5 obs

○ 2007-11-15 20:13:06
● 2015-07-15 02:54:30
● 2017-02-08 04:03:34
○ 2026-03-30 22:45:24
○ 2026-08-03 03:53:40

○NStest-dns.coredns.com2015-07-15 → 2017-02-08 · 5 obs

○ 2007-11-15 20:13:06
● 2015-07-15 02:54:30
● 2017-02-08 04:03:34
○ 2026-03-30 22:45:24
○ 2026-08-03 03:53:40

●MXclassesbyemail-com.mail.protection.outlook.com2026-03-30 → 2026-08-03 · 3 obs

○ 2017-02-08 04:03:34
● 2026-03-30 22:45:24
● 2026-08-03 03:53:40

○MXmail.computech-online.net2007-11-15 → 2017-02-08 · 4 obs

● 2007-11-15 20:13:06
● 2017-02-08 04:03:34
○ 2026-03-30 22:45:24
○ 2026-08-03 03:53:40

●A104.21.37.472026-03-30 → 2026-08-03 · 3 obs

○ 2017-02-08 04:03:34
● 2026-03-30 22:45:24
● 2026-08-03 03:53:40

●A172.67.203.2442026-03-30 → 2026-08-03 · 3 obs

○ 2017-02-08 04:03:34
● 2026-03-30 22:45:24
● 2026-08-03 03:53:40

○A209.115.53.762007-11-15 → 2017-02-08 · 4 obs

● 2007-11-15 20:13:06
● 2017-02-08 04:03:34
○ 2026-03-30 22:45:24
○ 2026-08-03 03:53:40

○A2606:4700:3030::ac43:cbf42026-03-30 → 2026-03-30 · 4 obs

○ 2017-02-08 04:03:34
● 2026-03-30 22:45:24
○ 2026-07-02 07:54:56
○ 2026-08-03 03:53:40

○A2606:4700:3031::6815:252f2026-03-30 → 2026-03-30 · 4 obs

○ 2017-02-08 04:03:34
● 2026-03-30 22:45:24
○ 2026-07-02 07:54:56
○ 2026-08-03 03:53:40

●A2606:4700:3033::6815:252f2026-07-02 → 2026-08-03 · 3 obs

○ 2026-03-30 22:45:24
● 2026-07-02 07:54:56
● 2026-08-03 03:53:40

●A2606:4700:3035::ac43:cbf42026-07-02 → 2026-08-03 · 3 obs

○ 2026-03-30 22:45:24
● 2026-07-02 07:54:56
● 2026-08-03 03:53:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
classesbyemail.com	april.ns.cloudflare.com, lars.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.66

NS records: april.ns.cloudflare.com, lars.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classesbyemail.com (unsigned zone)

⏱️ Timing

Total: 324ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.203.244, 104.21.37.47`
AAAA	2	`2606:4700:3035::ac43:cbf4, 2606:4700:3033::6815:252f`
NS	2	`april.ns.cloudflare.com, lars.ns.cloudflare.com`
MX	1	`classesbyemail-com.mail.protection.outlo`
TXT	2	`MS=ms60734127, v=spf1 include:_spf.google.com include:o`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`april.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

classesbyemail.com directs to four IP numbers, which are 104.21.37.47, 172.67.203.244, 2606:4700:3033::6815:252f and 2606:4700:3035::ac43:cbf4.

Additional host names — 886948.com, qbsznkj.com, wahdoor.com and two others — share IP numbers with classesbyemail.com.

Name Servers

classesbyemail.com has two authoritative name servers — april.ns.cloudflare.com and lars.ns.cloudflare.com.

classesbyemail.com shares its name server setup with other domains, including conveyorsolutions.ie, beaumex.ie, rhd.ie and two others.

The name servers of classesbyemail.com overlap at least partially with those of other domains — among them lingsiyi.com, grendesign.com.au, antesdafama.com.br and two more.

These name servers commonly appear alongside the name servers joel.ns.cloudflare.com and harlee.ns.cloudflare.com.

Host names with 6 IP numbers:

april.ns.cloudflare.com points to 108.162.192.66, 172.64.32.66, 173.245.58.66 and 3 other IP addresses.

lars.ns.cloudflare.com points to 108.162.193.195, 172.64.33.195, 173.245.59.195 and 3 other IP addresses.

Mail Servers

classesbyemail.com has one mail server: classesbyemail-com.mail.protection.outlook.com.

classesbyemail-com.mail.protection.outlook.com points to 8 IP numbers: 52.101.8.34, 52.101.8.44, 52.101.9.11 and 5 other.