`engineeringknow.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:ad1c^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::6815:3fef^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.63.239^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.173.28^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`alaric.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c1f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alaric.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c31f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`alaric.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:231f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`alaric.ns.cloudflare.com`
		A	108.162.195.31^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alaric.ns.cloudflare.com`
		A	162.159.44.31^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alaric.ns.cloudflare.com`
		A	172.64.35.31^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alaric.ns.cloudflare.com`
NS	`paityn.ns.cloudflare.com`
		A	2606:4700:50::a29f:2612^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`paityn.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c212^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`paityn.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2212^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`paityn.ns.cloudflare.com`
		A	108.162.194.18^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`paityn.ns.cloudflare.com`
		A	162.159.38.18^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`paityn.ns.cloudflare.com`
		A	172.64.34.18^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`paityn.ns.cloudflare.com`
MX	`mx.engineeringknow.com` ⭐
		A	2606:4700:3030::ac43:ad1c^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	2606:4700:3033::6815:3fef^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	104.21.63.239^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.67.173.28^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.63.239, 172.67.173.28
		IPv6 hints	2606:4700:3030::ac43:ad1c, 2606:4700:3033::6815:3fef
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=11, name=cloudflare-ech.com
SOA	`alaric.ns.cloudflare.com`dns@cloudflare.com serial=2402671999

`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=1778590481

Subdomains

529dbf8851c3.engineeringknow.com

mx.engineeringknow.com

Same first word

engineeringknow.com

DNS History

13 records (7 active, 6 former)

●NSalaric.ns.cloudflare.com2026-02-22 → 2026-05-12 · 3 obs

○ 2017-08-14 01:29:56
● 2026-02-22 14:01:00
● 2026-05-12 13:17:32

○NSns39.domaincontrol.com2017-08-14 → 2017-08-14 · 3 obs

● 2017-08-14 01:29:56
○ 2026-02-22 14:01:00
○ 2026-05-12 13:17:32

○NSns40.domaincontrol.com2017-08-14 → 2017-08-14 · 3 obs

● 2017-08-14 01:29:56
○ 2026-02-22 14:01:00
○ 2026-05-12 13:17:32

●NSpaityn.ns.cloudflare.com2026-02-22 → 2026-05-12 · 3 obs

○ 2017-08-14 01:29:56
● 2026-02-22 14:01:00
● 2026-05-12 13:17:32

○MX_dc-mx.529dbf8851c3.engineeringknow.com2026-02-22 → 2026-05-12 · 2 obs

○ 2026-02-22 14:01:00
○ 2026-05-12 13:17:32

●MXmx.engineeringknow.com2026-02-22 → 2026-05-12 · 2 obs

● 2026-02-22 14:01:00
● 2026-05-12 13:17:32

●A104.21.63.2392026-02-22 → 2026-05-12 · 3 obs

○ 2017-08-14 01:29:56
● 2026-02-22 14:01:00
● 2026-05-12 13:17:32

○A172.64.80.12026-02-22 → 2026-05-12 · 2 obs

○ 2026-02-22 14:01:00
○ 2026-05-12 13:17:32

●A172.67.173.282026-02-22 → 2026-05-12 · 3 obs

○ 2017-08-14 01:29:56
● 2026-02-22 14:01:00
● 2026-05-12 13:17:32

○A2606:4700:130:436c:6f75:6466:6c61:72652026-02-22 → 2026-05-12 · 2 obs

○ 2026-02-22 14:01:00
○ 2026-05-12 13:17:32

●A2606:4700:3030::ac43:ad1c2026-02-22 → 2026-05-12 · 3 obs

○ 2017-08-14 01:29:56
● 2026-02-22 14:01:00
● 2026-05-12 13:17:32

●A2606:4700:3033::6815:3fef2026-02-22 → 2026-05-12 · 3 obs

○ 2017-08-14 01:29:56
● 2026-02-22 14:01:00
● 2026-05-12 13:17:32

○A50.63.202.602017-08-14 → 2017-08-14 · 3 obs

● 2017-08-14 01:29:56
○ 2026-02-22 14:01:00
○ 2026-05-12 13:17:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, c.gtld-servers.net, m.gtld-servers.net, a.gtld-servers.net...	-
engineeringknow.com	paityn.ns.cloudflare.com, alaric.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.18

NS records: paityn.ns.cloudflare.com, alaric.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for engineeringknow.com (unsigned zone)

⏱️ Timing

Total: 502ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.173.28, 104.21.63.239`
AAAA	2	`2606:4700:3033::6815:3fef, 2606:4700:3030::ac43:ad1c`
NS	2	`alaric.ns.cloudflare.com, paityn.ns.cloudflare.com`
MX	1	`mx.engineeringknow.com (pri: 0)`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`alaric.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

engineeringknow.com is parent of 529dbf8851c3.engineeringknow.com and mx.engineeringknow.com.

IP Addresses

engineeringknow.com points to four IP numbers: 2606:4700:3030::ac43:ad1c, 2606:4700:3033::6815:3fef, 104.21.63.239 and 172.67.173.28.

Other host names, for instance londonicerinks.co.uk, www.little-boxes.de, www.eatatgeorgias.com, mirxes.us and vinalosperiq.sbs share IP numbers with engineeringknow.com.

Name Servers

engineeringknow.com's delegation is to two name servers alaric.ns.cloudflare.com and paityn.ns.cloudflare.com.

engineeringknow.com shares the same name server configuration as other domains, such as freedomfighterreports.com, victoriaclubbhotelpuri.com, archive3d.net, ledger-shop.live and pcgearplaza.com.

engineeringknow.com at least partially shares its name servers with other domains, for instance musuyokoninvestments.forum, mensobsession.com, blockasset.sbs, flownextstudio.sbs and dulopoguqiamanagementltd.click.

These name servers are commonly used with ajay.ns.cloudflare.com, sloan.ns.cloudflare.com and poppy.ns.cloudflare.com.

Host names with six IP numbers:

alaric.ns.cloudflare.com points to: 2606:4700:58::a29f:2c1f, 2803:f800:50::6ca2:c31f, 2a06:98c1:50::ac40:231f, 108.162.195.31, 162.159.44.31 and 172.64.35.31.

paityn.ns.cloudflare.com points to: 2606:4700:50::a29f:2612, 2803:f800:50::6ca2:c212, 2a06:98c1:50::ac40:2212, 108.162.194.18, 162.159.38.18 and 172.64.34.18.

Mail Servers

engineeringknow.com is served by a single mail server, mx.engineeringknow.com.

mx.engineeringknow.com resolves to four IPs: 2606:4700:3030::ac43:ad1c, 2606:4700:3033::6815:3fef, 104.21.63.239 and 172.67.173.28.

engineeringknow.com - robtex.com