`mathnotes.online`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:7e7^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::ac43:bc14^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.7.231^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.188.20^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`damien.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2ca8^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`damien.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3a8^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`damien.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23a8^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`damien.ns.cloudflare.com`
		A	108.162.195.168^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`damien.ns.cloudflare.com`
		A	162.159.44.168^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`damien.ns.cloudflare.com`
		A	172.64.35.168^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`damien.ns.cloudflare.com`
NS	`emerie.ns.cloudflare.com`
		A	2606:4700:50::a29f:2673^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`emerie.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c273^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`emerie.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2273^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`emerie.ns.cloudflare.com`
		A	108.162.194.115^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`emerie.ns.cloudflare.com`
		A	162.159.38.115^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`emerie.ns.cloudflare.com`
		A	172.64.34.115^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`emerie.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.7.231, 172.67.188.20
		IPv6 hints	2606:4700:3033::6815:7e7, 2606:4700:3033::ac43:bc14
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=214, name=cloudflare-ech.com
SOA	`damien.ns.cloudflare.com`dns@cloudflare.com serial=2403290992

`online`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns01.trs-dns.com` ⭐
	NS	`ns.trs-dns.com`
	NS	`ns01.trs-dns.net`
	NS	`ns10.trs-dns.info`
	NS	`ns10.trs-dns.org`
	SOA	`ns.trs-dns.com`trs-ops@tucows.com serial=1778384320

Subdomains

learn.mathnotes.online

Same first word

mathnotes.org

mathnotes.us

mathnotes.online

mathnotes.net

mathnotes.com

mathnotes.cc

Similar names

DNS History

6 records (6 active, 0 former)

●NSdamien.ns.cloudflare.com2026-04-22 → 2026-05-10 · 2 obs

● 2026-04-22 04:10:16
● 2026-05-10 04:07:28

●NSemerie.ns.cloudflare.com2026-04-22 → 2026-05-10 · 2 obs

● 2026-04-22 04:10:16
● 2026-05-10 04:07:28

●A104.21.7.2312026-04-22 → 2026-05-10 · 2 obs

● 2026-04-22 04:10:16
● 2026-05-10 04:07:28

●A172.67.188.202026-04-22 → 2026-05-10 · 2 obs

● 2026-04-22 04:10:16
● 2026-05-10 04:07:28

●A2606:4700:3033::6815:7e72026-04-22 → 2026-05-10 · 2 obs

● 2026-04-22 04:10:16
● 2026-05-10 04:07:28

●A2606:4700:3033::ac43:bc142026-04-22 → 2026-05-10 · 2 obs

● 2026-04-22 04:10:16
● 2026-05-10 04:07:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
online	ns10.trs-dns.info, ns01.trs-dns.net, ns01.trs-dns.com, ns10.trs-dns.org	-
mathnotes.online	damien.ns.cloudflare.com, emerie.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.34.115

NS records: damien.ns.cloudflare.com, emerie.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mathnotes.online (unsigned zone)

⏱️ Timing

Total: 349ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.7.231, 172.67.188.20`
AAAA	2	`2606:4700:3033::ac43:bc14, 2606:4700:3033::6815:7e7`
NS	2	`damien.ns.cloudflare.com, emerie.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`damien.ns.cloudflare.com dns.cloudflare.`

Analysis

Hierarchy

mathnotes.online is a parent of learn.mathnotes.online.

IP Addresses

mathnotes.online points to four IP numbers: 2606:4700:3033::6815:7e7, 2606:4700:3033::ac43:bc14, 104.21.7.231 and 172.67.188.20.

Other host names, for instance canalvisiondorada.com.co, www.sapporo2.com, librosmexico.mx, www.descargarpara.com and woq.cc share IP numbers with mathnotes.online.

Name Servers

Delegation for mathnotes.online rests with two name servers, damien.ns.cloudflare.com and emerie.ns.cloudflare.com.

mathnotes.online shares the same name server setup as other domains, including robdotmarketing.com, pneducation.org, highschoolteachers.org, galaxias-fs.com and foxgo.edu.vn.

mathnotes.online at least partially shares name servers with other domains, for instance cenotavr-md.com, hjclp.com, moviestarplanet2.tech, orathenquiva.sbs and blueedenscraptrading.com.

These name servers are commonly used with adi.ns.cloudflare.com and guss.ns.cloudflare.com.

Host names with six IP numbers: damien.ns.cloudflare.com points to: 2606:4700:58::a29f:2ca8, 2803:f800:50::6ca2:c3a8, 2a06:98c1:50::ac40:23a8, 108.162.195.168, 162.159.44.168 and 172.64.35.168. emerie.ns.cloudflare.com points to: 2606:4700:50::a29f:2673, 2803:f800:50::6ca2:c273, 2a06:98c1:50::ac40:2273, 108.162.194.115, 162.159.38.115 and 172.64.34.115.

mathnotes.online - robtex.com