`linuxinstruction.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3035::6815:2113^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:9d99^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.33.19^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.157.153^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`andronicus.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c71^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`andronicus.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c371^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`andronicus.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2371^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`andronicus.ns.cloudflare.com`
		A	108.162.195.113^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`andronicus.ns.cloudflare.com`
		A	162.159.44.113^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`andronicus.ns.cloudflare.com`
		A	172.64.35.113^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`andronicus.ns.cloudflare.com`
NS	`carioca.ns.cloudflare.com`
		A	2606:4700:50::a29f:2614^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carioca.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c214^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`carioca.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2214^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`carioca.ns.cloudflare.com`
		A	108.162.194.20^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carioca.ns.cloudflare.com`
		A	162.159.38.20^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carioca.ns.cloudflare.com`
		A	172.64.34.20^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carioca.ns.cloudflare.com`
MX	`_dc-mx.bd4e04f91788.linuxinstruction.com` ⭐
		A	35.212.105.59^{🇺🇸 Google35.212.0.0/17}
			PTR	`59.105.212.35.bc.googleusercontent.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.33.19, 172.67.157.153
		IPv6	2606:4700:3035::6815:2113, 2606:4700:3035::ac43:9d99
SOA	`andronicus.ns.cloudflare.com`dns@cloudflare.com serial=2397177750

`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=1774582392

Subdomains

mail.linuxinstruction.com

Same first word

linuxinstruction.com

DNS History

17 records (7 active, 10 former)

●NSandronicus.ns.cloudflare.com2026-03-27 → 2026-03-27 · 2 obs

○ 2026-02-15 08:29:40
● 2026-03-27 04:02:48

●NScarioca.ns.cloudflare.com2026-03-27 → 2026-03-27 · 2 obs

○ 2026-02-15 08:29:40
● 2026-03-27 04:02:48

○NSns1.digitalocean.com2020-03-26 → 2026-02-15 · 4 obs

○ 2016-05-06 17:55:44
● 2020-03-26 23:18:02
● 2026-02-15 08:29:40
○ 2026-03-27 04:02:48

○NSns1.localhost.ltd2015-07-20 → 2016-05-06 · 6 obs

● 2015-07-20 20:18:00
● 2015-11-22 08:11:16
○ 2016-02-26 05:25:48
● 2016-05-06 17:55:44
○ 2020-03-26 23:18:02
○ 2026-03-27 04:02:48

○NSns1.mitchellmedia.com2015-07-20 → 2016-05-06 · 4 obs

● 2015-07-20 20:18:00
● 2016-05-06 17:55:44
○ 2020-03-26 23:18:02
○ 2026-03-27 04:02:48

○NSns2.digitalocean.com2020-03-26 → 2026-02-15 · 4 obs

○ 2016-05-06 17:55:44
● 2020-03-26 23:18:02
● 2026-02-15 08:29:40
○ 2026-03-27 04:02:48

○NSns2.mitchellmedia.com2015-07-20 → 2016-05-06 · 4 obs

● 2015-07-20 20:18:00
● 2016-05-06 17:55:44
○ 2020-03-26 23:18:02
○ 2026-03-27 04:02:48

○NSns3.digitalocean.com2020-03-26 → 2026-02-15 · 4 obs

○ 2016-05-06 17:55:44
● 2020-03-26 23:18:02
● 2026-02-15 08:29:40
○ 2026-03-27 04:02:48

●MX_dc-mx.bd4e04f91788.linuxinstruction.com2026-03-27 → 2026-03-27 · 2 obs

○ 2026-02-15 08:29:40
● 2026-03-27 04:02:48

○MXmail.linuxinstruction.com2015-07-20 → 2026-02-15 · 3 obs

● 2015-07-20 20:18:00
● 2026-02-15 08:29:40
○ 2026-03-27 04:02:48

●A104.21.33.192026-03-27 → 2026-03-27 · 2 obs

○ 2026-02-15 08:29:40
● 2026-03-27 04:02:48

●A172.67.157.1532026-03-27 → 2026-03-27 · 2 obs

○ 2026-02-15 08:29:40
● 2026-03-27 04:02:48

○A208.110.66.1782015-07-20 → 2015-11-22 · 4 obs

● 2015-07-20 20:18:00
● 2015-11-22 08:11:16
○ 2016-02-26 05:25:48
○ 2026-03-27 04:02:48

●A2606:4700:3035::6815:21132026-03-27 → 2026-03-27 · 2 obs

○ 2026-02-15 08:29:40
● 2026-03-27 04:02:48

●A2606:4700:3035::ac43:9d992026-03-27 → 2026-03-27 · 2 obs

○ 2026-02-15 08:29:40
● 2026-03-27 04:02:48

○A35.212.105.592026-02-14 → 2026-02-15 · 4 obs

○ 2020-03-26 23:18:02
● 2026-02-14 21:40:46
● 2026-02-15 08:29:40
○ 2026-03-27 04:02:48

○A52.2.245.982016-02-26 → 2020-03-26 · 5 obs

○ 2015-11-22 08:11:16
● 2016-02-26 05:25:48
● 2020-03-26 23:18:02
○ 2026-02-14 21:40:46
○ 2026-03-27 04:02:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
linuxinstruction.com	carioca.ns.cloudflare.com, andronicus.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.195.113

NS records: carioca.ns.cloudflare.com, andronicus.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for linuxinstruction.com (unsigned zone)

⏱️ Timing

Total: 107ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.157.153, 104.21.33.19`
AAAA	2	`2606:4700:3035::6815:2113, 2606:4700:3035::ac43:9d99`
NS	2	`andronicus.ns.cloudflare.com, carioca.ns.cloudflare.com`
MX	1	`_dc-mx.bd4e04f91788.linuxinstruction.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`andronicus.ns.cloudflare.com dns.cloudfl`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

linuxinstruction.com is the parent of mail.linuxinstruction.com.

IP Addresses

Four IP numbers are pointed to by linuxinstruction.com: 2606:4700:3035::6815:2113, 2606:4700:3035::ac43:9d99, 104.21.33.19 and 172.67.157.153.

other host names including koxijolokiaanalytics.click, jukijuki.com, pandagrid.click, 1716384.com and ourgamingnow.com share IP numbers with linuxinstruction.com.

Name Servers

linuxinstruction.com is delegated to two name servers andronicus.ns.cloudflare.com and carioca.ns.cloudflare.com.

linuxinstruction.com uses the same name server setup as other domains such as belgeenligne.casino, mitchellmedia.com, meshkateducation.com and moderatedgroups.com.

linuxinstruction.com at least partially shares name servers with other domains, for instance casino-profit.com, lemodels.com, mingdowjiazu.com, blkstar.net and 91m.net.

these name servers are commonly used alongside treasure.ns.cloudflare.com.

Host names with six IP numbers:

Host name andronicus.ns.cloudflare.com points to: 2606:4700:58::a29f:2c71, 2803:f800:50::6ca2:c371, 2a06:98c1:50::ac40:2371, 108.162.195.113, 162.159.44.113 and 172.64.35.113.

Host name carioca.ns.cloudflare.com points to: 2606:4700:50::a29f:2614, 2803:f800:50::6ca2:c214, 2a06:98c1:50::ac40:2214, 108.162.194.20, 162.159.38.20 and 172.64.34.20.

Mail Servers

linuxinstruction.com is handled by a single mail server, _dc-mx.bd4e04f91788.linuxinstruction.com.

_dc-mx.bd4e04f91788.linuxinstruction.com resolves to IP 35.212.105.59.

linuxinstruction.com - robtex.com