`mathnotes.cc`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:cb78^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::6815:1651^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.22.81^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.203.120^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`celeste.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2607^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`celeste.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c207^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`celeste.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2207^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`celeste.ns.cloudflare.com`
		A	108.162.194.7^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`celeste.ns.cloudflare.com`
		A	162.159.38.7^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`celeste.ns.cloudflare.com`
		A	172.64.34.7^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`celeste.ns.cloudflare.com`
NS	`eric.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b70^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c170^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`eric.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2170^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`eric.ns.cloudflare.com`
		A	108.162.193.112^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
		A	172.64.33.112^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
		A	173.245.59.112^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
MX	`mx2.zoho.com` ⭐
		A	204.141.33.44^{🇺🇸 ZohoAS204.141.32.0/23 PNAP-DAL CASE00103239}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx3.zoho.com`⁽²⁰⁾
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx.zoho.com`⁽⁵⁰⁾
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
		A	204.141.33.44^{🇺🇸 ZohoAS204.141.32.0/23 PNAP-DAL CASE00103239}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
TXT	`v=spf1 include:zohomail.com ~all`
TXT	`zoho-verification=zb50511831.zmverify.zoho.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.22.81, 172.67.203.120
		IPv6 hints	2606:4700:3030::ac43:cb78, 2606:4700:3036::6815:1651
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=80, name=cloudflare-ech.com
SOA	`celeste.ns.cloudflare.com`dns@cloudflare.com serial=2402239783

`cc`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ac1.nstld.com` ⭐
	NS	`ac2.nstld.com`
	NS	`ac3.nstld.com`
	NS	`ac4.nstld.com`
	SOA	`ac1.nstld.com`info@verisign-grs.com serial=1778357812

PTR for

20.184.147.217.in-addr.arpa

Same first word

mathnotes.net

mathnotes.com

mathnotes.cc

mathnotes.org

mathnotes.us

mathnotes.online

Similar names

DNS History

28 records (9 active, 19 former)

●NSceleste.ns.cloudflare.com2026-03-16 → 2026-05-09 · 3 obs

○ 2020-02-03 03:04:10
● 2026-03-16 02:45:58
● 2026-05-09 20:33:42

○NSdns1.name-services.com2015-07-26 → 2020-02-03 · 4 obs

● 2015-07-26 03:04:42
● 2020-02-03 03:04:10
○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○NSdns2.name-services.com2015-07-26 → 2020-02-03 · 4 obs

● 2015-07-26 03:04:42
● 2020-02-03 03:04:10
○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○NSdns3.name-services.com2015-07-26 → 2020-02-03 · 4 obs

● 2015-07-26 03:04:42
● 2020-02-03 03:04:10
○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○NSdns4.name-services.com2015-07-26 → 2020-02-03 · 4 obs

● 2015-07-26 03:04:42
● 2020-02-03 03:04:10
○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○NSdns5.name-services.com2015-07-26 → 2020-02-03 · 4 obs

● 2015-07-26 03:04:42
● 2020-02-03 03:04:10
○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

●NSeric.ns.cloudflare.com2026-03-16 → 2026-05-09 · 3 obs

○ 2020-02-03 03:04:10
● 2026-03-16 02:45:58
● 2026-05-09 20:33:42

○NSns-cloud-b1.googledomains.com2026-03-16 → 2026-05-09 · 2 obs

○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○NSns-cloud-b2.googledomains.com2026-03-16 → 2026-05-09 · 2 obs

○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○NSns-cloud-b3.googledomains.com2026-03-16 → 2026-05-09 · 2 obs

○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○NSns-cloud-b4.googledomains.com2026-03-16 → 2026-05-09 · 2 obs

○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○MXalt1.aspmx.l.google.com2015-07-26 → 2020-02-03 · 4 obs

● 2015-07-26 03:04:42
● 2020-02-03 03:04:10
○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○MXalt2.aspmx.l.google.com2015-07-26 → 2020-02-03 · 4 obs

● 2015-07-26 03:04:42
● 2020-02-03 03:04:10
○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○MXaspmx.l.google.com2015-07-26 → 2020-02-03 · 4 obs

● 2015-07-26 03:04:42
● 2020-02-03 03:04:10
○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○MXaspmx2.googlemail.com2015-07-26 → 2020-02-03 · 4 obs

● 2015-07-26 03:04:42
● 2020-02-03 03:04:10
○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○MXaspmx3.googlemail.com2015-07-26 → 2020-02-03 · 4 obs

● 2015-07-26 03:04:42
● 2020-02-03 03:04:10
○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

●MXmx.zoho.com2026-03-16 → 2026-05-09 · 3 obs

○ 2020-02-03 03:04:10
● 2026-03-16 02:45:58
● 2026-05-09 20:33:42

●MXmx2.zoho.com2026-03-16 → 2026-05-09 · 3 obs

○ 2020-02-03 03:04:10
● 2026-03-16 02:45:58
● 2026-05-09 20:33:42

●MXmx3.zoho.com2026-03-16 → 2026-05-09 · 3 obs

○ 2020-02-03 03:04:10
● 2026-03-16 02:45:58
● 2026-05-09 20:33:42

●A104.21.22.812026-04-24 → 2026-05-09 · 3 obs

○ 2026-03-16 02:45:58
● 2026-04-24 15:01:34
● 2026-05-09 20:33:42

○A107.170.49.1622017-02-17 → 2017-02-17 · 4 obs

○ 2016-07-05 18:18:50
● 2017-02-17 12:35:58
○ 2020-02-03 03:04:10
○ 2026-05-09 20:33:42

●A172.67.203.1202026-04-24 → 2026-05-09 · 3 obs

○ 2026-03-16 02:45:58
● 2026-04-24 15:01:34
● 2026-05-09 20:33:42

○A217.147.184.202026-03-16 → 2026-05-09 · 2 obs

○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

●A2606:4700:3030::ac43:cb782026-04-24 → 2026-05-09 · 3 obs

○ 2026-03-16 02:45:58
● 2026-04-24 15:01:34
● 2026-05-09 20:33:42

●A2606:4700:3036::6815:16512026-04-24 → 2026-05-09 · 3 obs

○ 2026-03-16 02:45:58
● 2026-04-24 15:01:34
● 2026-05-09 20:33:42

○A34.66.186.2102020-02-03 → 2020-02-03 · 4 obs

○ 2017-02-17 12:35:58
● 2020-02-03 03:04:10
○ 2026-03-16 02:45:58
○ 2026-05-09 20:33:42

○A50.142.232.612015-07-26 → 2015-12-04 · 4 obs

● 2015-07-26 03:04:42
● 2015-12-04 16:19:34
○ 2016-03-08 13:01:06
○ 2026-05-09 20:33:42

○A76.123.235.872016-03-08 → 2016-07-05 · 5 obs

○ 2015-12-04 16:19:34
● 2016-03-08 13:01:06
● 2016-07-05 18:18:50
○ 2017-02-17 12:35:58
○ 2026-05-09 20:33:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cc	ac1.nstld.com, ac2.nstld.com, ac3.nstld.com, ac4.nstld.com	-
mathnotes.cc	eric.ns.cloudflare.com, celeste.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.193.112

NS records: eric.ns.cloudflare.com, celeste.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mathnotes.cc (unsigned zone)

⏱️ Timing

Total: 344ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.22.81, 172.67.203.120`
AAAA	2	`2606:4700:3036::6815:1651, 2606:4700:3030::ac43:cb78`
NS	2	`celeste.ns.cloudflare.com, eric.ns.cloudflare.com`
MX	3	`mx.zoho.com (pri: 10), mx2.zoho.com (pri: 20)...`
TXT	2	`v=spf1 include:zohomail.com ~all, zoho-verification=zb50511831.zmverify.zo`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`celeste.ns.cloudflare.com dns.cloudflare`

Analysis

IP Addresses

mathnotes.cc resolves to four IP numbers: 2606:4700:3030::ac43:cb78, 2606:4700:3036::6815:1651, 104.21.22.81 and 172.67.203.120.

other host names for instance koge.sk, fuliappdown.com, 9ee739737a02.pizzafactory.biz, www.shangwaiwang.com and www.tidewaterpainting.com share IP numbers with mathnotes.cc.

Name Servers

mathnotes.cc is delegated to two name servers: celeste.ns.cloudflare.com and eric.ns.cloudflare.com.

mathnotes.cc uses the same name server setup as pogonaut.com, goodranchers.com and moo-studio.com.

mathnotes.cc at least partially shares name servers with other domains, for instance innovativekitchens.com.au, myfiles57498.pages.dev, portblau.com, kccomic.com and bins.se.

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

Host names with six IP numbers:

celeste.ns.cloudflare.com points to: 2606:4700:50::a29f:2607, 2803:f800:50::6ca2:c207, 2a06:98c1:50::ac40:2207, 108.162.194.7, 162.159.38.7 and 172.64.34.7; eric.ns.cloudflare.com points to: 2606:4700:58::adf5:3b70, 2803:f800:50::6ca2:c170, 2a06:98c1:50::ac40:2170, 108.162.193.112, 172.64.33.112 and 173.245.59.112.

Mail Servers

mathnotes.cc is handled by three mail servers: mx2.zoho.com, mx3.zoho.com and mx.zoho.com.

mathnotes.cc shares mail servers with other domains at least partially, including spacebarn.ca, ofertaslaplata.com.ar, threeshadowsmedia.com, hazecrypto.net and ririwear.com.

Host names with two IPs:

mx.zoho.com points to 136.143.191.44 and 204.141.33.44.

Host names with one IP:

mx2.zoho.com points to 204.141.33.44

mx3.zoho.com points to 136.143.191.44

Names pointing to 136.143.191.44: mx.zoho.com and mx3.zoho.com

Names pointing to 204.141.33.44: mx.zoho.com and mx2.zoho.com

mathnotes.cc - robtex.com

mathnotes.cc

cc

PTR for

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`mathnotes.cc`

`cc`