`tutorchallenge.com`

DNSSEC	⚠️ Not signed
A	76.76.21.21^{🇺🇸 Amazon76.76.21.0/24 EC2 Prefix}
NS	`dexter.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2cbe^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dexter.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3be^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`dexter.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23be^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`dexter.ns.cloudflare.com`
		A	108.162.195.190^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dexter.ns.cloudflare.com`
		A	162.159.44.190^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dexter.ns.cloudflare.com`
		A	172.64.35.190^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dexter.ns.cloudflare.com`
NS	`grannbo.ns.cloudflare.com`
		A	2606:4700:50::a29f:2696^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c296^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`grannbo.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2296^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`grannbo.ns.cloudflare.com`
		A	108.162.194.150^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
		A	162.159.38.150^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
		A	172.64.34.150^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
SOA	`dexter.ns.cloudflare.com`dns@cloudflare.com serial=2396634804

`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=1774644197

Previously MX for

tutorchallenge.com

Same first word

tutorchallenge.com

DNS History

16 records (3 active, 13 former)

●NSdexter.ns.cloudflare.com2026-02-22 → 2026-03-27 · 3 obs

○ 2020-01-20 17:58:16
● 2026-02-22 07:38:28
● 2026-03-27 21:05:10

●NSgrannbo.ns.cloudflare.com2026-02-22 → 2026-03-27 · 3 obs

○ 2020-01-20 17:58:16
● 2026-02-22 07:38:28
● 2026-03-27 21:05:10

○NSns1.dnslink.com2017-02-16 → 2017-02-16 · 4 obs

○ 2016-04-28 14:40:44
● 2017-02-16 18:37:26
○ 2020-01-20 17:58:16
○ 2026-03-27 21:05:10

○NSns1.namebrightdns.com2020-01-20 → 2020-01-20 · 4 obs

○ 2017-02-16 18:37:26
● 2020-01-20 17:58:16
○ 2026-02-22 07:38:28
○ 2026-03-27 21:05:10

○NSns1.vnic.com2015-06-22 → 2016-04-28 · 4 obs

● 2015-06-22 15:17:34
● 2016-04-28 14:40:44
○ 2017-02-16 18:37:26
○ 2026-03-27 21:05:10

○NSns2.dnslink.com2017-02-16 → 2017-02-16 · 4 obs

○ 2016-04-28 14:40:44
● 2017-02-16 18:37:26
○ 2020-01-20 17:58:16
○ 2026-03-27 21:05:10

○NSns2.namebrightdns.com2020-01-20 → 2020-01-20 · 4 obs

○ 2017-02-16 18:37:26
● 2020-01-20 17:58:16
○ 2026-02-22 07:38:28
○ 2026-03-27 21:05:10

○NSns2.vnic.com2015-06-22 → 2016-04-28 · 4 obs

● 2015-06-22 15:17:34
● 2016-04-28 14:40:44
○ 2017-02-16 18:37:26
○ 2026-03-27 21:05:10

○MXmail.b-io.co2017-02-16 → 2017-02-16 · 4 obs

○ 2016-04-28 14:40:44
● 2017-02-16 18:37:26
○ 2020-01-20 17:58:16
○ 2026-03-27 21:05:10

○MXmail1.namebrightmail.com2020-01-20 → 2020-01-20 · 4 obs

○ 2017-02-16 18:37:26
● 2020-01-20 17:58:16
○ 2026-02-22 07:38:28
○ 2026-03-27 21:05:10

○MXmail2.namebrightmail.com2020-01-20 → 2020-01-20 · 4 obs

○ 2017-02-16 18:37:26
● 2020-01-20 17:58:16
○ 2026-02-22 07:38:28
○ 2026-03-27 21:05:10

○MXtutorchallenge.com2015-06-22 → 2016-04-28 · 4 obs

● 2015-06-22 15:17:34
● 2016-04-28 14:40:44
○ 2017-02-16 18:37:26
○ 2026-03-27 21:05:10

○A162.209.11.42015-06-22 → 2016-04-28 · 4 obs

● 2015-06-22 15:17:34
● 2016-04-28 14:40:44
○ 2017-02-16 18:37:26
○ 2026-03-27 21:05:10

○A209.15.13.1342017-02-16 → 2017-02-16 · 4 obs

○ 2016-04-28 14:40:44
● 2017-02-16 18:37:26
○ 2020-01-20 17:58:16
○ 2026-03-27 21:05:10

●A76.76.21.212026-02-22 → 2026-03-27 · 3 obs

○ 2020-01-20 17:58:16
● 2026-02-22 07:38:28
● 2026-03-27 21:05:10

○CNAMEcomingsoon.namebright.com2020-01-20 → 2020-01-20 · 3 obs

● 2020-01-20 17:58:16
○ 2026-02-22 07:38:28
○ 2026-03-27 21:05:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, d.gtld-servers.net, c.gtld-servers.net, l.gtld-servers.net...	-
tutorchallenge.com	grannbo.ns.cloudflare.com, dexter.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.150

NS records: grannbo.ns.cloudflare.com, dexter.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for tutorchallenge.com (unsigned zone)

⏱️ Timing

Total: 113ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`76.76.21.21`
NS	2	`dexter.ns.cloudflare.com, grannbo.ns.cloudflare.com`
SOA	1	`dexter.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

tutorchallenge.com points to a single IP number: 76.76.21.21.

Other host names, for instance dtbrasil.com.br, colby-christopher.com, pp-cars.de, gchsgreyhounds.com and ba4ai.com share IP numbers with tutorchallenge.com.

Name Servers

Delegation for tutorchallenge.com rests with two name servers, dexter.ns.cloudflare.com and grannbo.ns.cloudflare.com.

tutorchallenge.com shares the same name server setup as other domains, including exserver.com, educationsoft.com, referencestream.com, techbot.com and selfhostcat.com.

tutorchallenge.com at least partially shares name servers with other domains, for instance 44991.com, changjinyixue.com, atrandall.com, lindgrens.me and 3689.us.

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

Host names with six IP numbers: dexter.ns.cloudflare.com points to: 2606:4700:58::a29f:2cbe, 2803:f800:50::6ca2:c3be, 2a06:98c1:50::ac40:23be, 108.162.195.190, 162.159.44.190 and 172.64.35.190. grannbo.ns.cloudflare.com points to: 2606:4700:50::a29f:2696, 2803:f800:50::6ca2:c296, 2a06:98c1:50::ac40:2296, 108.162.194.150, 162.159.38.150 and 172.64.34.150.

tutorchallenge.com - robtex.com