class4.us - dns.ninja

`class4.us`

DNSSEC	⚠️ Not signed
A	74.208.40.39^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
NS	`dara.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a5b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dara.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c05b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`dara.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:205b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`dara.ns.cloudflare.com`
		A	108.162.192.91^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dara.ns.cloudflare.com`
		A	172.64.32.91^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dara.ns.cloudflare.com`
		A	173.245.58.91^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dara.ns.cloudflare.com`
NS	`doug.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b9f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`doug.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c19f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`doug.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:219f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`doug.ns.cloudflare.com`
		A	108.162.193.159^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`doug.ns.cloudflare.com`
		A	172.64.33.159^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`doug.ns.cloudflare.com`
		A	173.245.59.159^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`doug.ns.cloudflare.com`
MX	`mx00.1and1.com` ⭐
		A	74.208.114.65^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
			PTR	`mx00.perfora.net`
MX	`mx01.1and1.com` ⭐
		A	74.208.114.66^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
			PTR	`mx01.perfora.net`
SOA	`dara.ns.cloudflare.com`dns@cloudflare.com serial=2411281950

`us`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.cctld.us` ⭐
	NS	`b.cctld.us`
	NS	`f.cctld.us`
	NS	`k.cctld.us`
	NS	`m.cctld.us`
	NS	`n.cctld.us`
	NS	`w.cctld.us`
	NS	`x.cctld.us`
	NS	`y.cctld.us`
	SOA	`a.cctld.us`admin@tldns.godaddy serial=1786634305

Same first word

class4.de

class4.us

class4.com

Similar names

4class.com

DNS History

9 records (5 active, 4 former)

●NSdara.ns.cloudflare.com2026-04-04 → 2026-08-13 · 3 obs

○ 2016-12-25 11:19:48
● 2026-04-04 20:29:16
● 2026-08-13 15:28:16

●NSdoug.ns.cloudflare.com2026-04-04 → 2026-08-13 · 3 obs

○ 2016-12-25 11:19:48
● 2026-04-04 20:29:16
● 2026-08-13 15:28:16

○NSns-cloud1.googledomains.com2015-06-16 → 2016-12-25 · 4 obs

● 2015-06-16 09:07:22
● 2016-12-25 11:19:48
○ 2026-04-04 20:29:16
○ 2026-08-13 15:28:16

○NSns-cloud2.googledomains.com2015-06-16 → 2016-12-25 · 4 obs

● 2015-06-16 09:07:22
● 2016-12-25 11:19:48
○ 2026-04-04 20:29:16
○ 2026-08-13 15:28:16

○NSns-cloud3.googledomains.com2015-06-16 → 2016-12-25 · 4 obs

● 2015-06-16 09:07:22
● 2016-12-25 11:19:48
○ 2026-04-04 20:29:16
○ 2026-08-13 15:28:16

○NSns-cloud4.googledomains.com2015-06-16 → 2016-12-25 · 4 obs

● 2015-06-16 09:07:22
● 2016-12-25 11:19:48
○ 2026-04-04 20:29:16
○ 2026-08-13 15:28:16

●MXmx00.1and1.com2015-06-16 → 2026-08-13 · 2 obs

● 2015-06-16 09:07:22
● 2026-08-13 15:28:16

●MXmx01.1and1.com2015-06-16 → 2026-08-13 · 2 obs

● 2015-06-16 09:07:22
● 2026-08-13 15:28:16

●A74.208.40.392015-06-16 → 2026-08-13 · 2 obs

● 2015-06-16 09:07:22
● 2026-08-13 15:28:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
us	m.cctld.us, b.cctld.us, f.cctld.us, n.cctld.us...	-
class4.us	dara.ns.cloudflare.com, doug.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.193.159

NS records: dara.ns.cloudflare.com, doug.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for class4.us (unsigned zone)

⏱️ Timing

Total: 748ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`74.208.40.39`
NS	2	`dara.ns.cloudflare.com, doug.ns.cloudflare.com`
MX	2	`mx00.1and1.com (pri: 10), mx01.1and1.com (pri: 10)`
SOA	1	`dara.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

class4.us directs to one IP number, which is 74.208.40.39.

Name Servers

The NS records for class4.us delegate to dara.ns.cloudflare.com and doug.ns.cloudflare.com.

class4.us has the same name server delegation as a number of other domains, such as konordo.com, cardsproject.com, mariainespesqueira.com and two more.

The name servers of class4.us overlap at least partially with those of other domains — among them samengstrom.com, stemilt.com, celibkambox.com and two more.

These name servers commonly appear alongside the name servers chan.ns.cloudflare.com and walt.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

dara.ns.cloudflare.com maps to 108.162.192.91, 172.64.32.91, 173.245.58.91 and 3 additional IP addresses.

doug.ns.cloudflare.com maps to 108.162.193.159, 172.64.33.159, 173.245.59.159 and 3 additional IP addresses.

Mail Servers

The MX records for class4.us point to two mail servers: mx00.1and1.com and mx01.1and1.com.

class4.us has the same mail server arrangement as a number of other domains, for example marteva.net, bukupet.com, milkworks.com and two more.

class4.us shares at least some of its mail servers with other domains — for example 2dcc.com, u16192246.onlinehome-server.com, u22415129.onlinehome-server.com and two more.

Both mx00.1and1.com and mx01.1and1.com have a single IP address each — mx00.1and1.com resolves to 74.208.114.65 while mx01.1and1.com resolves to 74.208.114.66.