`linearalgebras.com`

DNSSEC	⚠️ Not signed
A	104.21.5.104^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.133.74^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`art.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b66^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c166^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`art.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2166^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`art.ns.cloudflare.com`
		A	108.162.193.102^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
		A	172.64.33.102^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
		A	173.245.59.102^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
NS	`rita.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a8c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rita.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c08c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`rita.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:208c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`rita.ns.cloudflare.com`
		A	108.162.192.140^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rita.ns.cloudflare.com`
		A	172.64.32.140^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rita.ns.cloudflare.com`
		A	173.245.58.140^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rita.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.5.104, 172.67.133.74
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=135, name=cloudflare-ech.com
SOA	`art.ns.cloudflare.com`dns@cloudflare.com serial=2400692795

`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=1776089892

Same first word

linearalgebras.com

DNS History

9 records (4 active, 5 former)

●NSart.ns.cloudflare.com2026-02-17 → 2026-04-13 · 3 obs

○ 2016-12-05 02:15:56
● 2026-02-17 09:34:12
● 2026-04-13 14:46:10

○NSns-cloud-b1.googledomains.com2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 02:15:56
○ 2026-02-17 09:34:12
○ 2026-04-13 14:46:10

○NSns-cloud-b2.googledomains.com2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 02:15:56
○ 2026-02-17 09:34:12
○ 2026-04-13 14:46:10

○NSns-cloud-b3.googledomains.com2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 02:15:56
○ 2026-02-17 09:34:12
○ 2026-04-13 14:46:10

○NSns-cloud-b4.googledomains.com2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 02:15:56
○ 2026-02-17 09:34:12
○ 2026-04-13 14:46:10

●NSrita.ns.cloudflare.com2026-02-17 → 2026-04-13 · 3 obs

○ 2016-12-05 02:15:56
● 2026-02-17 09:34:12
● 2026-04-13 14:46:10

●A104.21.5.1042026-02-17 → 2026-04-13 · 3 obs

○ 2016-12-05 02:15:56
● 2026-02-17 09:34:12
● 2026-04-13 14:46:10

●A172.67.133.742026-02-17 → 2026-04-13 · 3 obs

○ 2016-12-05 02:15:56
● 2026-02-17 09:34:12
● 2026-04-13 14:46:10

○A192.30.252.1542016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 02:15:56
○ 2026-02-17 09:34:12
○ 2026-04-13 14:46:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
linearalgebras.com	rita.ns.cloudflare.com, art.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.140

NS records: rita.ns.cloudflare.com, art.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for linearalgebras.com (unsigned zone)

⏱️ Timing

Total: 181ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.5.104, 172.67.133.74`
NS	2	`art.ns.cloudflare.com, rita.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`art.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

linearalgebras.com points to two IP numbers: 104.21.5.104 and 172.67.133.74.

Other host names, for instance www.nextcc.com, forum.exo-reallife.de, forwardjanesville.com, anguoo.com and infinitygroup.pl share IP numbers with linearalgebras.com.

Name Servers

Delegation for linearalgebras.com rests with two name servers, art.ns.cloudflare.com and rita.ns.cloudflare.com.

linearalgebras.com shares the same name server setup as other domains, including erpcinc.com, ichun.us, beautyallthat.com, tcvsuja.org and phayulmedia.com.

linearalgebras.com at least partially shares name servers with other domains, for instance fossilpassion.com, limoso.com.au, jusa.com.mx, m-w.com.pl and heraldodecoatzacoalcos.com.mx.

These name servers are commonly used with the name servers tim.ns.cloudflare.com.

Host names with six IP numbers: art.ns.cloudflare.com points to: 2606:4700:58::adf5:3b66, 2803:f800:50::6ca2:c166, 2a06:98c1:50::ac40:2166, 108.162.193.102, 172.64.33.102 and 173.245.59.102. rita.ns.cloudflare.com points to: 2606:4700:50::adf5:3a8c, 2803:f800:50::6ca2:c08c, 2a06:98c1:50::ac40:208c, 108.162.192.140, 172.64.32.140 and 173.245.58.140.

linearalgebras.com - robtex.com