linuxsysadmin.co.uk - dns.ninja

`linuxsysadmin.co.uk`

DNSSEC	⚠️ Not signed
A	2606:4700:3034::6815:4e41^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:d970^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.78.65^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.217.112^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`dee.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a5d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dee.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c05d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`dee.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:205d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`dee.ns.cloudflare.com`
		A	108.162.192.93^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dee.ns.cloudflare.com`
		A	172.64.32.93^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dee.ns.cloudflare.com`
		A	173.245.58.93^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dee.ns.cloudflare.com`
NS	`ethan.ns.cloudflare.com`
		A	2606:4700:58::a29f:2ce8^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ethan.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3e8^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ethan.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23e8^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ethan.ns.cloudflare.com`
		A	108.162.195.232^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ethan.ns.cloudflare.com`
		A	162.159.44.232^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ethan.ns.cloudflare.com`
		A	172.64.35.232^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ethan.ns.cloudflare.com`
MX	`in1-smtp.messagingengine.com` ⭐
		A	103.168.172.216^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-01.messagingengine.com`
		A	103.168.172.217^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-02.messagingengine.com`
		A	103.168.172.218^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-03.messagingengine.com`
		A	103.168.172.219^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-04.messagingengine.com`
		A	103.168.172.220^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-05.messagingengine.com`
		A	103.168.172.221^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-06.messagingengine.com`
		A	103.168.172.222^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-07.messagingengine.com`
		A	103.168.172.223^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-08.messagingengine.com`
MX	`in2-smtp.messagingengine.com`⁽²⁰⁾
		A	202.12.124.216^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-01.messagingengine.com`
		A	202.12.124.217^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-02.messagingengine.com`
		A	202.12.124.218^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-03.messagingengine.com`
		A	202.12.124.219^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-04.messagingengine.com`
TXT	`v=spf1 include:spf.messagingengine.com ?all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.78.65, 172.67.217.112
		IPv6 hints	2606:4700:3034::6815:4e41, 2606:4700:3035::ac43:d970
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=222, name=cloudflare-ech.com
SOA	`dee.ns.cloudflare.com`dns@cloudflare.com serial=2410231967

`co.uk`

	DNSSEC	⚠️ Not signed
	NS	`dns1.nic.uk` ⭐ ⚠️ Not in parent delegation
	NS	`dns2.nic.uk` ⚠️ Not in parent delegation
	NS	`dns3.nic.uk` ⚠️ Not in parent delegation
	NS	`dns4.nic.uk` ⚠️ Not in parent delegation
	NS	`nsa.nic.uk` ⚠️ Not in parent delegation
	NS	`nsb.nic.uk` ⚠️ Not in parent delegation
	NS	`nsc.nic.uk` ⚠️ Not in parent delegation
	NS	`nsd.nic.uk` ⚠️ Not in parent delegation
	TXT	`#Timestamp: 1786431900`
	SOA	`dns1.nic.uk`hostmaster@nominet.org.uk serial=1786432249

rank #117649 globally
rank #3555 in the tld
WOT: SAFE (74/100)

Same first word

linuxsysadmin.com

linuxsysadmin.info

linuxsysadmin.net

linuxsysadmin.io

linuxsysadmin.de

linuxsysadmin.co.uk

Similar names

sysadminlinux.com

DNS History

29 records (8 active, 21 former)

●NSdee.ns.cloudflare.com2026-03-04 → 2026-08-11 · 3 obs

○ 2020-02-22 14:04:14
● 2026-03-04 13:52:04
● 2026-08-11 07:38:20

●NSethan.ns.cloudflare.com2026-03-04 → 2026-08-11 · 3 obs

○ 2020-02-22 14:04:14
● 2026-03-04 13:52:04
● 2026-08-11 07:38:20

○NSns0.gradwell.com2015-05-14 → 2016-03-22 · 4 obs

● 2015-05-14 14:47:12
● 2016-03-22 23:18:14
○ 2016-07-12 02:54:44
○ 2026-08-11 07:38:20

○NSns1.gradwell.net2015-05-14 → 2016-03-22 · 4 obs

● 2015-05-14 14:47:12
● 2016-03-22 23:18:14
○ 2016-07-12 02:54:44
○ 2026-08-11 07:38:20

○NSns1.softlayer.com2016-07-12 → 2020-02-22 · 5 obs

○ 2016-03-22 23:18:14
● 2016-07-12 02:54:44
● 2020-02-22 14:04:14
○ 2026-03-04 13:52:04
○ 2026-08-11 07:38:20

○NSns2.gradwell.net2015-05-14 → 2016-03-22 · 4 obs

● 2015-05-14 14:47:12
● 2016-03-22 23:18:14
○ 2016-07-12 02:54:44
○ 2026-08-11 07:38:20

○NSns2.softlayer.com2016-07-12 → 2020-02-22 · 5 obs

○ 2016-03-22 23:18:14
● 2016-07-12 02:54:44
● 2020-02-22 14:04:14
○ 2026-03-04 13:52:04
○ 2026-08-11 07:38:20

○NSnyc.r96.com2015-05-14 → 2020-02-22 · 4 obs

● 2015-05-14 14:47:12
● 2020-02-22 14:04:14
○ 2026-03-04 13:52:04
○ 2026-08-11 07:38:20

○NSnyc.r97.com2015-05-14 → 2020-02-22 · 4 obs

● 2015-05-14 14:47:12
● 2020-02-22 14:04:14
○ 2026-03-04 13:52:04
○ 2026-08-11 07:38:20

●MXin1-smtp.messagingengine.com2026-03-04 → 2026-08-11 · 3 obs

○ 2020-02-22 14:04:14
● 2026-03-04 13:52:04
● 2026-08-11 07:38:20

●MXin2-smtp.messagingengine.com2026-03-04 → 2026-08-11 · 3 obs

○ 2020-02-22 14:04:14
● 2026-03-04 13:52:04
● 2026-08-11 07:38:20

○MXmail.linuxsysadmin.co.uk2015-05-14 → 2020-02-22 · 4 obs

● 2015-05-14 14:47:12
● 2020-02-22 14:04:14
○ 2026-03-04 13:52:04
○ 2026-08-11 07:38:20

○MXmxbackup.gradwell.net2015-05-14 → 2016-03-22 · 4 obs

● 2015-05-14 14:47:12
● 2016-03-22 23:18:14
○ 2016-07-12 02:54:44
○ 2026-08-11 07:38:20

○MXr96.com2015-05-14 → 2020-02-22 · 4 obs

● 2015-05-14 14:47:12
● 2020-02-22 14:04:14
○ 2026-03-04 13:52:04
○ 2026-08-11 07:38:20

○MXr97.com2015-05-14 → 2020-02-22 · 4 obs

● 2015-05-14 14:47:12
● 2020-02-22 14:04:14
○ 2026-03-04 13:52:04
○ 2026-08-11 07:38:20

●A104.21.78.652026-03-21 → 2026-08-11 · 5 obs

○ 2026-03-04 13:52:04
● 2026-03-21 10:57:08
● 2026-06-13 00:47:38
○ 2026-06-18 11:32:28
● 2026-08-11 07:38:20

○A169.55.84.2062020-02-22 → 2020-02-22 · 4 obs

○ 2017-03-21 09:13:16
● 2020-02-22 14:04:14
○ 2026-03-04 13:52:04
○ 2026-08-11 07:38:20

●A172.67.217.1122026-03-21 → 2026-08-11 · 5 obs

○ 2026-03-04 13:52:04
● 2026-03-21 10:57:08
● 2026-06-13 00:47:38
○ 2026-06-18 11:32:28
● 2026-08-11 07:38:20

○A188.114.96.02026-03-04 → 2026-07-26 · 8 obs

○ 2020-02-22 14:04:14
● 2026-03-04 13:52:04
○ 2026-03-21 10:57:08
○ 2026-06-13 00:47:38
● 2026-06-18 11:32:28
○ 2026-06-22 18:22:28
● 2026-07-26 19:03:38
○ 2026-08-11 07:38:20

○A188.114.96.42026-06-22 → 2026-06-22 · 4 obs

○ 2026-06-18 11:32:28
● 2026-06-22 18:22:28
○ 2026-07-26 19:03:38
○ 2026-08-11 07:38:20

○A188.114.97.02026-03-04 → 2026-07-26 · 8 obs

○ 2020-02-22 14:04:14
● 2026-03-04 13:52:04
○ 2026-03-21 10:57:08
○ 2026-06-13 00:47:38
● 2026-06-18 11:32:28
○ 2026-06-22 18:22:28
● 2026-07-26 19:03:38
○ 2026-08-11 07:38:20

○A188.114.97.42026-06-22 → 2026-06-22 · 4 obs

○ 2026-06-18 11:32:28
● 2026-06-22 18:22:28
○ 2026-07-26 19:03:38
○ 2026-08-11 07:38:20

○A2606:4700:3030::6815:4e412026-03-21 → 2026-06-13 · 5 obs

○ 2026-03-04 13:52:04
● 2026-03-21 10:57:08
● 2026-06-13 00:47:38
○ 2026-06-18 11:32:28
○ 2026-08-11 07:38:20

●A2606:4700:3034::6815:4e412026-08-11 → 2026-08-11 · 2 obs

○ 2026-07-26 19:03:38
● 2026-08-11 07:38:20

○A2606:4700:3034::ac43:d9702026-03-21 → 2026-06-13 · 5 obs

○ 2026-03-04 13:52:04
● 2026-03-21 10:57:08
● 2026-06-13 00:47:38
○ 2026-06-18 11:32:28
○ 2026-08-11 07:38:20

●A2606:4700:3035::ac43:d9702026-08-11 → 2026-08-11 · 2 obs

○ 2026-07-26 19:03:38
● 2026-08-11 07:38:20

○A2a06:98c1:3120::2026-03-04 → 2026-06-18 · 6 obs

○ 2020-02-22 14:04:14
● 2026-03-04 13:52:04
○ 2026-03-21 10:57:08
○ 2026-06-13 00:47:38
● 2026-06-18 11:32:28
○ 2026-08-11 07:38:20

○A2a06:98c1:3121::2026-03-04 → 2026-06-18 · 6 obs

○ 2020-02-22 14:04:14
● 2026-03-04 13:52:04
○ 2026-03-21 10:57:08
○ 2026-06-13 00:47:38
● 2026-06-18 11:32:28
○ 2026-08-11 07:38:20

○A67.18.156.1382015-05-14 → 2017-03-21 · 4 obs

● 2015-05-14 14:47:12
● 2017-03-21 09:13:16
○ 2020-02-22 14:04:14
○ 2026-08-11 07:38:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
uk	nsa.nic.uk, nsb.nic.uk, nsc.nic.uk, nsd.nic.uk...	-
linuxsysadmin.co.uk	dee.ns.cloudflare.com, ethan.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.192.93

NS records: dee.ns.cloudflare.com, ethan.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for linuxsysadmin.co.uk (unsigned zone)

⏱️ Timing

Total: 383ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.217.112, 104.21.78.65`
AAAA	2	`2606:4700:3035::ac43:d970, 2606:4700:3034::6815:4e41`
NS	2	`dee.ns.cloudflare.com, ethan.ns.cloudflare.com`
MX	2	`in1-smtp.messagingengine.com (pri: 10), in2-smtp.messagingengine.com (pri: 20)`
TXT	1	`v=spf1 include:spf.messagingengine.com ?`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`dee.ns.cloudflare.com dns.cloudflare.com`

Analysis

IP Addresses

linuxsysadmin.co.uk resolves to four IP addresses: 104.21.78.65, 172.67.217.112, 2606:4700:3034::6815:4e41 and 2606:4700:3035::ac43:d970.

confirm-appointment.cfd, klappbett.de.com, gasshowroom.com.au plus two other host names have IP numbers in common with linuxsysadmin.co.uk.

Name Servers

linuxsysadmin.co.uk has two authoritative name servers — dee.ns.cloudflare.com and ethan.ns.cloudflare.com.

The name server configuration of linuxsysadmin.co.uk is shared with other domains, for instance arbinyan.com, repo-game.org, 82-0-challenge.com and two others.

linuxsysadmin.co.uk partially shares its NS delegation with several other domains, including hanifagroup.kz, evarazdin.hr, soul-t.com and two others.

These name servers are regularly seen alongside buck.ns.cloudflare.com and walk.ns.cloudflare.com as name servers.

Hosts with 6 IP addresses each:

dee.ns.cloudflare.com points to 108.162.192.93, 172.64.32.93, 173.245.58.93 and 3 other IP addresses.

ethan.ns.cloudflare.com points to 108.162.195.232, 162.159.44.232, 172.64.35.232 and 3 other IP addresses.

Mail Servers

linuxsysadmin.co.uk uses two mail servers, in1-smtp.messagingengine.com and in2-smtp.messagingengine.com.

The mail server setup of linuxsysadmin.co.uk matches that of other domains such as svss.net, blog.mp, treuhand-gmbh.com and two others.

linuxsysadmin.co.uk partially shares its mail servers with other domains, 30minuteseder.com and hgm89.com being examples.

Hosts with 8 IP addresses each:

in1-smtp.messagingengine.com points to 103.168.172.216, 103.168.172.217, 103.168.172.218 and 5 other IP addresses.

Host names with four IP addresses:

in2-smtp.messagingengine.com maps to the following IP addresses: 202.12.124.216, 202.12.124.217, 202.12.124.218 and 202.12.124.219.