`teachecker.net`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:c52^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:97ec^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.12.82^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.151.236^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`lakas.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3bc2^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lakas.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1c2^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lakas.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21c2^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lakas.ns.cloudflare.com`
		A	108.162.193.194^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lakas.ns.cloudflare.com`
		A	172.64.33.194^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lakas.ns.cloudflare.com`
		A	173.245.59.194^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lakas.ns.cloudflare.com`
NS	`sydney.ns.cloudflare.com`
		A	2606:4700:50::a29f:2666^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sydney.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c266^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`sydney.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2266^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`sydney.ns.cloudflare.com`
		A	108.162.194.102^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sydney.ns.cloudflare.com`
		A	162.159.38.102^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sydney.ns.cloudflare.com`
		A	172.64.34.102^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sydney.ns.cloudflare.com`
MX	`route1.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	162.159.205.11^{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	`route3.mx.cloudflare.net`⁽⁸⁾
		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	`route2.mx.cloudflare.net`⁽²⁰⁾
		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=YbNWqrrA84UAm9Rbkx62pDoZBboh_GOMbrbChZfxiuY`
TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.12.82, 172.67.151.236
		IPv6	2606:4700:3032::6815:c52, 2606:4700:3035::ac43:97ec
SOA	`lakas.ns.cloudflare.com`dns@cloudflare.com serial=2398546570

`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=1771291465

Same first word

teachecker.app

teachecker.com

teachecker.net

DNS History

9 records (9 active, 0 former)

●NSlakas.ns.cloudflare.com2026-03-02 → 2026-03-23 · 2 obs

● 2026-03-02 06:34:36
● 2026-03-23 15:26:50

●NSsydney.ns.cloudflare.com2026-03-02 → 2026-03-23 · 2 obs

● 2026-03-02 06:34:36
● 2026-03-23 15:26:50

●MXroute1.mx.cloudflare.net2026-03-02 → 2026-03-23 · 2 obs

● 2026-03-02 06:34:36
● 2026-03-23 15:26:50

●MXroute2.mx.cloudflare.net2026-03-02 → 2026-03-23 · 2 obs

● 2026-03-02 06:34:36
● 2026-03-23 15:26:50

●MXroute3.mx.cloudflare.net2026-03-02 → 2026-03-23 · 2 obs

● 2026-03-02 06:34:36
● 2026-03-23 15:26:50

●A104.21.12.822026-03-02 → 2026-03-23 · 2 obs

● 2026-03-02 06:34:36
● 2026-03-23 15:26:50

●A172.67.151.2362026-03-02 → 2026-03-23 · 2 obs

● 2026-03-02 06:34:36
● 2026-03-23 15:26:50

●A2606:4700:3032::6815:c522026-03-02 → 2026-03-23 · 2 obs

● 2026-03-02 06:34:36
● 2026-03-23 15:26:50

●A2606:4700:3035::ac43:97ec2026-03-02 → 2026-03-23 · 2 obs

● 2026-03-02 06:34:36
● 2026-03-23 15:26:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	f.gtld-servers.net, h.gtld-servers.net, k.gtld-servers.net, a.gtld-servers.net...	-
teachecker.net	lakas.ns.cloudflare.com, sydney.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.194.102

NS records: lakas.ns.cloudflare.com, sydney.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for teachecker.net (unsigned zone)

⏱️ Timing

Total: 432ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.12.82, 172.67.151.236`
AAAA	2	`2606:4700:3035::ac43:97ec, 2606:4700:3032::6815:c52`
NS	2	`lakas.ns.cloudflare.com, sydney.ns.cloudflare.com`
MX	3	`route2.mx.cloudflare.net (pri: 20), route1.mx.cloudflare.net (pri: 5)...`
TXT	2	`google-site-verification=YbNWqrrA84UAm9R, v=spf1 include:_spf.mx.cloudflare.net ~a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`lakas.ns.cloudflare.com dns.cloudflare.c`

Analysis

IP Addresses

teachecker.net resolves to four IP numbers: 2606:4700:3032::6815:c52, 2606:4700:3035::ac43:97ec, 104.21.12.82 and 172.67.151.236.

other host names for instance brillianideas.com, www.flexderek.com, nebula.mk, ot20.com and jsamc.net share IP numbers with teachecker.net.

Name Servers

teachecker.net is delegated to two name servers: lakas.ns.cloudflare.com and sydney.ns.cloudflare.com.

teachecker.net shares the same name server setup as other domains, for example carlosspin.nl and ai-ux.com.

teachecker.net at least partially shares name servers with other domains, for instance xuezx.com, ciberescritas.com, drfernandochiabai.com.br, i3x0j8fqhz.workers.dev and 1dentity.co.

These name servers are commonly used with kipp.ns.cloudflare.com, deb.ns.cloudflare.com, jerry.ns.cloudflare.com and nadia.ns.cloudflare.com.

Host names with six IP numbers:

lakas.ns.cloudflare.com points to: 2606:4700:58::adf5:3bc2, 2803:f800:50::6ca2:c1c2, 2a06:98c1:50::ac40:21c2, 108.162.193.194, 172.64.33.194 and 173.245.59.194; sydney.ns.cloudflare.com points to: 2606:4700:50::a29f:2666, 2803:f800:50::6ca2:c266, 2a06:98c1:50::ac40:2266, 108.162.194.102, 162.159.38.102 and 172.64.34.102.

Mail Servers

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

teachecker.net shares mail servers with other domains at least partially, including bpreach.com, mpeg4ip.net, nibali.org, sysupdate.top and biosung.co.id.

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.

teachecker.net - robtex.com

teachecker.net

net

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`teachecker.net`

`net`