🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`linuxperformancebook.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3036::ac43:947c^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:27ce^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.39.206^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.148.124^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`elsa.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a6f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c06f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`elsa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:206f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`elsa.ns.cloudflare.com`
		A	108.162.192.111^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
		A	172.64.32.111^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
		A	173.245.58.111^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
NS	`reese.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c75^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`reese.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c375^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`reese.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2375^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`reese.ns.cloudflare.com`
		A	108.162.195.117^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`reese.ns.cloudflare.com`
		A	162.159.44.117^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`reese.ns.cloudflare.com`
		A	172.64.35.117^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`reese.ns.cloudflare.com`
MX	`route3.mx.cloudflare.net` ⭐
		A	2606:4700:f5::11^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::12^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::13^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.23^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.24^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.25^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
MX	`route1.mx.cloudflare.net`⁽³¹⁾
		A	2606:4700:f5::b^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::c^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::d^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.11^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.12^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.13^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
MX	`route2.mx.cloudflare.net`⁽⁸⁰⁾
		A	2606:4700:f5::e^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::f^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::10^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.17^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.18^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.19^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.39.206, 172.67.148.124
		IPv6 hints	2606:4700:3036::ac43:947c, 2606:4700:3037::6815:27ce
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=243, name=cloudflare-ech.com
SOA	`elsa.ns.cloudflare.com`dns@cloudflare.com serial=2413731195

`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=1788857598

Same first word

linuxperformancebook.pages.dev

linuxperformancebook.com

Previous names

linuxpcx.com

linuxpda.com

linuxpe.com

linuxpeak.com

linuxpeasant.com

linuxpedi.com

linuxpedia.com

linuxpeek.com

linuxpeer.com

linuxpen.com

linuxpeople.com

linuxpeppermint.com

linuxperf.com

linuxperformance.com

Next names

DNS History

9 records (9 active, 0 former)

●NSelsa.ns.cloudflare.com2026-08-31 → 2026-09-08 · 2 obs

● 2026-08-31 14:18:12
● 2026-09-08 09:18:18

●NSreese.ns.cloudflare.com2026-08-31 → 2026-09-08 · 2 obs

● 2026-08-31 14:18:12
● 2026-09-08 09:18:18

●MXroute1.mx.cloudflare.net2026-09-05 → 2026-09-08 · 2 obs

● 2026-09-05 13:07:52
● 2026-09-08 09:18:18

●MXroute2.mx.cloudflare.net2026-09-05 → 2026-09-08 · 2 obs

● 2026-09-05 13:07:52
● 2026-09-08 09:18:18

●MXroute3.mx.cloudflare.net2026-09-05 → 2026-09-08 · 2 obs

● 2026-09-05 13:07:52
● 2026-09-08 09:18:18

●A104.21.39.2062026-08-31 → 2026-09-08 · 2 obs

● 2026-08-31 14:18:12
● 2026-09-08 09:18:18

●A172.67.148.1242026-08-31 → 2026-09-08 · 2 obs

● 2026-08-31 14:18:12
● 2026-09-08 09:18:18

●A2606:4700:3036::ac43:947c2026-08-31 → 2026-09-08 · 2 obs

● 2026-08-31 14:18:12
● 2026-09-08 09:18:18

●A2606:4700:3037::6815:27ce2026-08-31 → 2026-09-08 · 2 obs

● 2026-08-31 14:18:12
● 2026-09-08 09:18:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	j.gtld-servers.net, g.gtld-servers.net, i.gtld-servers.net, b.gtld-servers.net...	-
linuxperformancebook.com	elsa.ns.cloudflare.com, reese.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.111

NS records: elsa.ns.cloudflare.com, reese.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for linuxperformancebook.com (unsigned zone)

⏱️ Timing

Total: 288ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.148.124, 104.21.39.206`
AAAA	2	`2606:4700:3037::6815:27ce, 2606:4700:3036::ac43:947c`
NS	2	`elsa.ns.cloudflare.com, reese.ns.cloudflare.com`
MX	3	`route3.mx.cloudflare.net (pri: 24), route1.mx.cloudflare.net (pri: 31)...`
TXT	1	`v=spf1 include:_spf.mx.cloudflare.net ~a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`elsa.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

linuxperformancebook.com points to the four IP addresses 104.21.39.206, 172.67.148.124, 2606:4700:3036::ac43:947c and 2606:4700:3037::6815:27ce.

Two other host names, along with autorepairwashington.com, arrivale-checkinv11.com and access.center, also share IP numbers with linuxperformancebook.com.

Name Servers

The NS records for linuxperformancebook.com delegate to elsa.ns.cloudflare.com and reese.ns.cloudflare.com.

linuxperformancebook.com shares its NS records with other domains, for example thomas-mcgill.workers.dev, ottavaarte.eu, muhmshop.com and two others.

At least some of linuxperformancebook.com's name servers are shared with other domains, for example sgamplify.info, in99.me, spranic.ai and two more.

It is common for these name servers to be used in conjunction with the name servers perla.ns.cloudflare.com, violet.ns.cloudflare.com and fred.ns.cloudflare.com.

DNS names with 6 IP addresses:

elsa.ns.cloudflare.com maps to 108.162.192.111, 172.64.32.111, 173.245.58.111 and 3 additional IP addresses.

reese.ns.cloudflare.com maps to 108.162.195.117, 162.159.44.117, 172.64.35.117 and 3 additional IP addresses.

Mail Servers

The MX records for linuxperformancebook.com list three mail servers: route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

There is at least a partial MX overlap between linuxperformancebook.com and other domains, including devbox.ovh, pantae.cc, ns2.thornburgs.net.net and two others.

DNS names with 6 IP addresses:

route1.mx.cloudflare.net maps to 162.159.205.11, 162.159.205.12, 162.159.205.13 and 3 additional IP addresses.

route2.mx.cloudflare.net maps to 162.159.205.17, 162.159.205.18, 162.159.205.19 and 3 additional IP addresses.

route3.mx.cloudflare.net maps to 162.159.205.23, 162.159.205.24, 162.159.205.25 and 3 additional IP addresses.

linuxperformancebook.com - robtex.com