`mathster.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::ac43:926f^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:279b^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.39.155^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.146.111^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`magdalena.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2608^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`magdalena.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c208^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`magdalena.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2208^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`magdalena.ns.cloudflare.com`
		A	108.162.194.8^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`magdalena.ns.cloudflare.com`
		A	162.159.38.8^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`magdalena.ns.cloudflare.com`
		A	172.64.34.8^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`magdalena.ns.cloudflare.com`
NS	`moura.ns.cloudflare.com`
		A	2606:4700:58::a29f:2cd9^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`moura.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3d9^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`moura.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23d9^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`moura.ns.cloudflare.com`
		A	108.162.195.217^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`moura.ns.cloudflare.com`
		A	162.159.44.217^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`moura.ns.cloudflare.com`
		A	172.64.35.217^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`moura.ns.cloudflare.com`
MX	`linda.mx.cloudflare.net` ⭐
		A	2606:4700:f5::b^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::c^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::d^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.23^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.24^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.25^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
MX	`isaac.mx.cloudflare.net`⁽²⁴⁾
		A	2606:4700:f5::e^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::f^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::10^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.17^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.18^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.19^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
MX	`amir.mx.cloudflare.net`⁽⁸³⁾
		A	2606:4700:f5::11^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::12^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::13^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.11^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.12^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.13^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
TXT	`v=spf1 ip4:82.145.39.59 +a +mx +ip4:138.68.181.48 include:mailgun.org include...`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.39.155, 172.67.146.111
		IPv6 hints	2606:4700:3032::ac43:926f, 2606:4700:3037::6815:279b
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=148, name=cloudflare-ech.com
SOA	`magdalena.ns.cloudflare.com`dns@cloudflare.com serial=2410087411

`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=1784713692

📈 Tranco rank: #693,474

PTR for

48.181.68.138.in-addr.arpa

Previously MX for

www.mathster.com

mathster.com

Subdomains

www.mathster.com

Same first word

mathster.com

mathster.org

Similar names

DNS History

20 records (9 active, 11 former)

●NSmagdalena.ns.cloudflare.com2026-02-17 → 2026-07-22 · 3 obs

○ 2017-03-26 07:52:50
● 2026-02-17 01:52:50
● 2026-07-22 09:51:14

●NSmoura.ns.cloudflare.com2026-02-17 → 2026-07-22 · 3 obs

○ 2017-03-26 07:52:50
● 2026-02-17 01:52:50
● 2026-07-22 09:51:14

○NSns1.articlestory.com2015-08-23 → 2017-03-26 · 4 obs

● 2015-08-23 00:04:50
● 2017-03-26 07:52:50
○ 2026-02-17 01:52:50
○ 2026-07-22 09:51:14

○NSns2.articlestory.com2015-08-23 → 2017-03-26 · 4 obs

● 2015-08-23 00:04:50
● 2017-03-26 07:52:50
○ 2026-02-17 01:52:50
○ 2026-07-22 09:51:14

●MXamir.mx.cloudflare.net2026-02-17 → 2026-07-22 · 3 obs

○ 2017-03-26 07:52:50
● 2026-02-17 01:52:50
● 2026-07-22 09:51:14

●MXisaac.mx.cloudflare.net2026-02-17 → 2026-07-22 · 3 obs

○ 2017-03-26 07:52:50
● 2026-02-17 01:52:50
● 2026-07-22 09:51:14

●MXlinda.mx.cloudflare.net2026-02-17 → 2026-07-22 · 3 obs

○ 2017-03-26 07:52:50
● 2026-02-17 01:52:50
● 2026-07-22 09:51:14

○MXmathster.com2015-08-23 → 2017-03-26 · 4 obs

● 2015-08-23 00:04:50
● 2017-03-26 07:52:50
○ 2026-02-17 01:52:50
○ 2026-07-22 09:51:14

●A104.21.39.1552026-02-17 → 2026-07-22 · 4 obs

○ 2017-03-26 07:52:50
● 2026-02-17 01:52:50
○ 2026-07-14 13:16:24
● 2026-07-22 09:51:14

●A172.67.146.1112026-02-17 → 2026-07-22 · 4 obs

○ 2017-03-26 07:52:50
● 2026-02-17 01:52:50
○ 2026-07-14 13:16:24
● 2026-07-22 09:51:14

○A188.114.96.02026-07-14 → 2026-07-14 · 3 obs

○ 2026-07-10 22:53:26
● 2026-07-14 13:16:24
○ 2026-07-22 09:51:14

○A188.114.97.02026-07-14 → 2026-07-14 · 3 obs

○ 2026-07-10 22:53:26
● 2026-07-14 13:16:24
○ 2026-07-22 09:51:14

○A2606:4700:3030::ac43:926f2026-02-17 → 2026-02-17 · 4 obs

○ 2017-03-26 07:52:50
● 2026-02-17 01:52:50
○ 2026-07-10 22:53:26
○ 2026-07-22 09:51:14

●A2606:4700:3032::ac43:926f2026-07-10 → 2026-07-22 · 4 obs

○ 2026-02-17 01:52:50
● 2026-07-10 22:53:26
○ 2026-07-14 13:16:24
● 2026-07-22 09:51:14

○A2606:4700:3034::6815:279b2026-02-17 → 2026-02-17 · 4 obs

○ 2017-03-26 07:52:50
● 2026-02-17 01:52:50
○ 2026-07-10 22:53:26
○ 2026-07-22 09:51:14

●A2606:4700:3037::6815:279b2026-07-10 → 2026-07-22 · 4 obs

○ 2026-02-17 01:52:50
● 2026-07-10 22:53:26
○ 2026-07-14 13:16:24
● 2026-07-22 09:51:14

○A2a06:98c1:3120::2026-07-14 → 2026-07-14 · 3 obs

○ 2026-07-10 22:53:26
● 2026-07-14 13:16:24
○ 2026-07-22 09:51:14

○A2a06:98c1:3121::2026-07-14 → 2026-07-14 · 3 obs

○ 2026-07-10 22:53:26
● 2026-07-14 13:16:24
○ 2026-07-22 09:51:14

○A82.145.38.1672015-08-23 → 2015-08-23 · 3 obs

● 2015-08-23 00:04:50
○ 2015-12-31 19:36:40
○ 2026-07-22 09:51:14

○A82.145.39.592015-12-31 → 2017-03-26 · 5 obs

○ 2015-08-23 00:04:50
● 2015-12-31 19:36:40
● 2017-03-26 07:52:50
○ 2026-02-17 01:52:50
○ 2026-07-22 09:51:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	d.gtld-servers.net, h.gtld-servers.net, f.gtld-servers.net, l.gtld-servers.net...	-
mathster.com	magdalena.ns.cloudflare.com, moura.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.8

NS records: magdalena.ns.cloudflare.com, moura.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mathster.com (unsigned zone)

⏱️ Timing

Total: 211ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.39.155, 172.67.146.111`
AAAA	2	`2606:4700:3032::ac43:926f, 2606:4700:3037::6815:279b`
NS	2	`magdalena.ns.cloudflare.com, moura.ns.cloudflare.com`
MX	3	`linda.mx.cloudflare.net (pri: 10), isaac.mx.cloudflare.net (pri: 24)...`
TXT	1	`v=spf1 ip4:82.145.39.59 +a +mx +ip4:138.`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`magdalena.ns.cloudflare.com dns.cloudfla`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

The domain www.mathster.com falls under the parent mathster.com.

IP Addresses

mathster.com directs to four IP numbers, which are 104.21.39.155, 172.67.146.111, 2606:4700:3032::ac43:926f and 2606:4700:3037::6815:279b.

Among the host names that share IP numbers with mathster.com are catrielonline.com.ar, gcdc.cloud, www.51minicloud.com and two others.

Name Servers

The NS records for mathster.com delegate to magdalena.ns.cloudflare.com and moura.ns.cloudflare.com.

mathster.com has the same name server delegation as a number of other domains, such as emedelynas.lt, vanya.cx, ad-kraft.com and two more.

At least some of mathster.com's name servers are shared with other domains, for example vgpcn.nl, 0xcoders.com, hikerdirect.com and two more.

These name servers are routinely co-deployed with the name servers jason.ns.cloudflare.com, becky.ns.cloudflare.com, donna.ns.cloudflare.com and two others.

Host names resolving to 6 IP numbers:

magdalena.ns.cloudflare.com maps to 108.162.194.8, 162.159.38.8, 172.64.34.8 and 3 additional IP addresses.

moura.ns.cloudflare.com maps to 108.162.195.217, 162.159.44.217, 172.64.35.217 and 3 additional IP addresses.

Mail Servers

The MX records for mathster.com list three mail servers: amir.mx.cloudflare.net, isaac.mx.cloudflare.net and linda.mx.cloudflare.net.

mathster.com shares at least some of its mail servers with other domains — for example fabmedia.io, peskey.info, lweb.co.uk and two more.

Host names resolving to 6 IP numbers:

amir.mx.cloudflare.net maps to 162.159.205.11, 162.159.205.12, 162.159.205.13 and 3 additional IP addresses.

isaac.mx.cloudflare.net maps to 162.159.205.17, 162.159.205.18, 162.159.205.19 and 3 additional IP addresses.

linda.mx.cloudflare.net maps to 162.159.205.23, 162.159.205.24, 162.159.205.25 and 3 additional IP addresses.

mathster.com - robtex.com

mathster.com

com

PTR for

Previously MX for

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`mathster.com`

`com`