`mathcheck.net`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:8fe8^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:474d^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.71.77^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.143.232^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`rene.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2cb4^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rene.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3b4^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`rene.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23b4^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`rene.ns.cloudflare.com`
		A	108.162.195.180^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rene.ns.cloudflare.com`
		A	162.159.44.180^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rene.ns.cloudflare.com`
		A	172.64.35.180^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rene.ns.cloudflare.com`
NS	`stephane.ns.cloudflare.com`
		A	2606:4700:50::a29f:2670^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stephane.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c270^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`stephane.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2270^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`stephane.ns.cloudflare.com`
		A	108.162.194.112^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stephane.ns.cloudflare.com`
		A	162.159.38.112^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stephane.ns.cloudflare.com`
		A	172.64.34.112^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stephane.ns.cloudflare.com`
MX	`route3.mx.cloudflare.net` ⭐
		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	162.159.205.23^{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	`route1.mx.cloudflare.net`⁽⁶⁸⁾
		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	162.159.205.11^{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`
MX	`route2.mx.cloudflare.net`⁽⁸³⁾
		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`
TXT	`google-site-verification=erfi-La4WIaZ_xsVZcZaeL0iDVqCyG46f6V40Wk8168`
TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.71.77, 172.67.143.232
		IPv6 hints	2606:4700:3031::ac43:8fe8, 2606:4700:3037::6815:474d
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=139, name=cloudflare-ech.com
SOA	`rene.ns.cloudflare.com`dns@cloudflare.com serial=2400365585

`net`

	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=1778395881

Same first word

mathcheck.net

mathcheck.com

Similar names

mactechhk.com

DNS History

9 records (9 active, 0 former)

●NSrene.ns.cloudflare.com2026-04-24 → 2026-05-10 · 2 obs

● 2026-04-24 05:42:16
● 2026-05-10 06:54:14

●NSstephane.ns.cloudflare.com2026-04-24 → 2026-05-10 · 2 obs

● 2026-04-24 05:42:16
● 2026-05-10 06:54:14

●MXroute1.mx.cloudflare.net2026-04-24 → 2026-05-10 · 2 obs

● 2026-04-24 05:42:16
● 2026-05-10 06:54:14

●MXroute2.mx.cloudflare.net2026-04-24 → 2026-05-10 · 2 obs

● 2026-04-24 05:42:16
● 2026-05-10 06:54:14

●MXroute3.mx.cloudflare.net2026-04-24 → 2026-05-10 · 2 obs

● 2026-04-24 05:42:16
● 2026-05-10 06:54:14

●A104.21.71.772026-04-24 → 2026-05-10 · 2 obs

● 2026-04-24 05:42:16
● 2026-05-10 06:54:14

●A172.67.143.2322026-04-24 → 2026-05-10 · 2 obs

● 2026-04-24 05:42:16
● 2026-05-10 06:54:14

●A2606:4700:3031::ac43:8fe82026-04-24 → 2026-05-10 · 2 obs

● 2026-04-24 05:42:16
● 2026-05-10 06:54:14

●A2606:4700:3037::6815:474d2026-04-24 → 2026-05-10 · 2 obs

● 2026-04-24 05:42:16
● 2026-05-10 06:54:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
mathcheck.net	stephane.ns.cloudflare.com, rene.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.194.112

NS records: stephane.ns.cloudflare.com, rene.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mathcheck.net (unsigned zone)

⏱️ Timing

Total: 389ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.143.232, 104.21.71.77`
AAAA	2	`2606:4700:3031::ac43:8fe8, 2606:4700:3037::6815:474d`
NS	2	`rene.ns.cloudflare.com, stephane.ns.cloudflare.com`
MX	3	`route3.mx.cloudflare.net (pri: 30), route1.mx.cloudflare.net (pri: 68)...`
TXT	2	`google-site-verification=erfi-La4WIaZ_xs, v=spf1 include:_spf.mx.cloudflare.net ~a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`rene.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

mathcheck.net points to four IP numbers: 2606:4700:3031::ac43:8fe8, 2606:4700:3037::6815:474d, 104.21.71.77 and 172.67.143.232.

Other host names, for instance coriafrican.com, redroz.com, www.cyberwork.be, www.a7m7.com and casb.com share IP numbers with mathcheck.net.

Name Servers

Delegation for mathcheck.net rests with two name servers, rene.ns.cloudflare.com and stephane.ns.cloudflare.com.

mathcheck.net shares the same name server setup as other domains, including paghamfc.com, edu-math-assets.org, lch.org.il, dimradio.ru and zerohour.uk.

mathcheck.net at least partially shares name servers with other domains, for instance front.org, amphtml.me, tennisplanet.de, metalmetalico.com.pe and regenlaar(0x736578)pert.nl.

These name servers are commonly used with dara.ns.cloudflare.com and stella.ns.cloudflare.com.

Host names with six IP numbers: rene.ns.cloudflare.com points to: 2606:4700:58::a29f:2cb4, 2803:f800:50::6ca2:c3b4, 2a06:98c1:50::ac40:23b4, 108.162.195.180, 162.159.44.180 and 172.64.35.180. stephane.ns.cloudflare.com points to: 2606:4700:50::a29f:2670, 2803:f800:50::6ca2:c270, 2a06:98c1:50::ac40:2270, 108.162.194.112, 162.159.38.112 and 172.64.34.112.

Mail Servers

mathcheck.net is handled by three mail servers: route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

mathcheck.net shares mail servers with other domains at least in part, for instance medicaidhospital.com, istanbulcool.com, zhouse.org, maaars.fr and fusang.mobi.

Host names with six IP numbers:

route1.mx.cloudflare.net points to: 2606:4700:f5::b, 2606:4700:f5::c, 2606:4700:f5::d, 162.159.205.11, 162.159.205.12 and 162.159.205.13.

route2.mx.cloudflare.net points to: 2606:4700:f5::e, 2606:4700:f5::f, 2606:4700:f5::10, 162.159.205.17, 162.159.205.18 and 162.159.205.19.

route3.mx.cloudflare.net points to: 2606:4700:f5::11, 2606:4700:f5::12, 2606:4700:f5::13, 162.159.205.23, 162.159.205.24 and 162.159.205.25.

mathcheck.net - robtex.com

mathcheck.net

net

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`mathcheck.net`

`net`