engineeringnotes.org - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`engineeringnotes.org`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:4cc0^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:c774^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.76.192^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.199.116^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`asa.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3af6^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`asa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0f6^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`asa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20f6^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`asa.ns.cloudflare.com`
		A	108.162.192.246^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.64.32.246^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	173.245.58.246^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`jeff.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b7c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jeff.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c17c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jeff.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:217c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jeff.ns.cloudflare.com`
		A	108.162.193.124^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jeff.ns.cloudflare.com`
		A	172.64.33.124^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jeff.ns.cloudflare.com`
		A	173.245.59.124^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jeff.ns.cloudflare.com`
MX	`mail.engineeringnotes.org` ⭐
		A	66.29.141.225^{🇺🇸 NAMCHEAP-PH66.29.141.0/24}
			PTR	`server313-3.web-hosting.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.76.192, 172.67.199.116
		IPv6 hints	2606:4700:3033::6815:4cc0, 2606:4700:3036::ac43:c774
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=225, name=cloudflare-ech.com
SOA	`asa.ns.cloudflare.com`dns@cloudflare.com serial=2411317920

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1788096147

Subdomains

mail.engineeringnotes.org

www.engineeringnotes.org

Same first word

engineeringnotes.org

engineeringnotes.com

Similar names

stoneengineering.com

stoneengineering.be

Previous names

Next names

DNS History

15 records (7 active, 8 former)

●NSasa.ns.cloudflare.com2016-12-25 → 2026-08-30 · 2 obs

● 2016-12-25 17:20:38
● 2026-08-30 13:43:26

●NSjeff.ns.cloudflare.com2016-12-25 → 2026-08-30 · 2 obs

● 2016-12-25 17:20:38
● 2026-08-30 13:43:26

●MXmail.engineeringnotes.org2016-12-25 → 2026-08-30 · 2 obs

● 2016-12-25 17:20:38
● 2026-08-30 13:43:26

●A104.21.76.1922026-08-24 → 2026-08-30 · 3 obs

○ 2018-08-21 17:07:34
● 2026-08-24 21:30:58
● 2026-08-30 13:43:26

○A104.27.148.1092018-08-21 → 2018-08-21 · 4 obs

○ 2016-12-25 17:20:38
● 2018-08-21 17:07:34
○ 2026-08-24 21:30:58
○ 2026-08-30 13:43:26

○A104.27.149.1092018-08-21 → 2018-08-21 · 4 obs

○ 2016-12-25 17:20:38
● 2018-08-21 17:07:34
○ 2026-08-24 21:30:58
○ 2026-08-30 13:43:26

○A104.28.0.1252016-12-25 → 2016-12-25 · 3 obs

● 2016-12-25 17:20:38
○ 2018-08-21 17:07:34
○ 2026-08-30 13:43:26

○A104.28.1.1252016-12-25 → 2016-12-25 · 3 obs

● 2016-12-25 17:20:38
○ 2018-08-21 17:07:34
○ 2026-08-30 13:43:26

●A172.67.199.1162026-08-24 → 2026-08-30 · 3 obs

○ 2018-08-21 17:07:34
● 2026-08-24 21:30:58
● 2026-08-30 13:43:26

○A2400:cb00:2048:1::681b:946d2018-08-21 → 2018-08-21 · 4 obs

○ 2016-12-25 17:20:38
● 2018-08-21 17:07:34
○ 2026-08-24 21:30:58
○ 2026-08-30 13:43:26

○A2400:cb00:2048:1::681b:956d2018-08-21 → 2018-08-21 · 4 obs

○ 2016-12-25 17:20:38
● 2018-08-21 17:07:34
○ 2026-08-24 21:30:58
○ 2026-08-30 13:43:26

○A2400:cb00:2048:1::681c:17d2016-12-25 → 2016-12-25 · 3 obs

● 2016-12-25 17:20:38
○ 2018-08-21 17:07:34
○ 2026-08-30 13:43:26

○A2400:cb00:2048:1::681c:7d2016-12-25 → 2016-12-25 · 3 obs

● 2016-12-25 17:20:38
○ 2018-08-21 17:07:34
○ 2026-08-30 13:43:26

●A2606:4700:3033::6815:4cc02026-08-24 → 2026-08-30 · 3 obs

○ 2018-08-21 17:07:34
● 2026-08-24 21:30:58
● 2026-08-30 13:43:26

●A2606:4700:3036::ac43:c7742026-08-24 → 2026-08-30 · 3 obs

○ 2018-08-21 17:07:34
● 2026-08-24 21:30:58
● 2026-08-30 13:43:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	d0.org.afilias-nst.org, b0.org.afilias-nst.org, b2.org.afilias-nst.org	-
engineeringnotes.org	jeff.ns.cloudflare.com, asa.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.246

NS records: jeff.ns.cloudflare.com, asa.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for engineeringnotes.org (unsigned zone)

⏱️ Timing

Total: 493ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.199.116, 104.21.76.192`
AAAA	2	`2606:4700:3036::ac43:c774, 2606:4700:3033::6815:4cc0`
NS	2	`asa.ns.cloudflare.com, jeff.ns.cloudflare.com`
MX	1	`mail.engineeringnotes.org (pri: 0)`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`asa.ns.cloudflare.com dns.cloudflare.com`

Analysis

Hierarchy

mail.engineeringnotes.org and www.engineeringnotes.org each fall under engineeringnotes.org as their parent domain.

IP Addresses

engineeringnotes.org resolves to four IP addresses: 104.21.76.192, 172.67.199.116, 2606:4700:3033::6815:4cc0 and 2606:4700:3036::ac43:c774.

Two other host names, along with glinmet.pl, ayunoxa.top and arrobbelut.cyou, also share IP numbers with engineeringnotes.org.

Name Servers

DNS delegation for engineeringnotes.org points to two name servers: asa.ns.cloudflare.com and jeff.ns.cloudflare.com.

engineeringnotes.org shares its NS records with other domains, for example chirotalk.com, bulldoglocks.com, whitelistads.com and two others.

engineeringnotes.org partially shares its NS delegation with several other domains, including omegatakilyfj.shop, techroll.gg, lauranhollmannb4a1v.pages.dev and two others.

These name servers often co-occur with the name servers kai.ns.cloudflare.com.

DNS names with 6 IP addresses:

asa.ns.cloudflare.com has IP addresses 108.162.192.246, 172.64.32.246 and 173.245.58.246, plus 3 other.

jeff.ns.cloudflare.com has IP addresses 108.162.193.124, 172.64.33.124 and 173.245.59.124, plus 3 other.

Mail Servers

The sole mail server for engineeringnotes.org is mail.engineeringnotes.org.

mail.engineeringnotes.org has exactly one IP number: 66.29.141.225.