masterclass.dev - dns.ninja

`masterclass.dev`

DNSSEC	⚠️ Not signed
A	2606:4700::6812:166b^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700::6812:176b^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.18.22.107^{Cloudflare104.18.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.18.23.107^{Cloudflare104.18.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`ariadne.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:26e1^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ariadne.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2e1^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ariadne.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22e1^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ariadne.ns.cloudflare.com`
		A	108.162.194.225^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ariadne.ns.cloudflare.com`
		A	162.159.38.225^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ariadne.ns.cloudflare.com`
		A	172.64.34.225^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ariadne.ns.cloudflare.com`
NS	`tom.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b93^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tom.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c193^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`tom.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2193^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`tom.ns.cloudflare.com`
		A	108.162.193.147^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tom.ns.cloudflare.com`
		A	172.64.33.147^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tom.ns.cloudflare.com`
		A	173.245.59.147^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tom.ns.cloudflare.com`
TXT	`apple-domain-verification=Dwh77ggSYSJLv0sV`
TXT	`stripe-verification=a724da2600b32898d16a622d440ffe5df365aede0ea0085dac363d14e...`
TXT	`stripe-verification=f4598fc28f5441e04a5f78cd69c1df5e2679418ccd8659c94a62348c0...`
TXT	`v=spf1 include:amazonses.com ~all`
TXT	`zapier-domain-verification-challenge=19e414b8-e209-4764-8a57-d3334dbacc43`
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	104.18.22.107, 104.18.23.107
		IPv6 hints	2606:4700::6812:166b, 2606:4700::6812:176b
SOA	`ariadne.ns.cloudflare.com`dns@cloudflare.com serial=2406018758

`dev`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=1

🔒 HSTS Preload (+subdomains)

Subdomains

acceptance.masterclass.dev

www.masterclass.dev

Same first word

masterclass.pt

masterclass.pk

masterclass.com.ua

masterclass.sydney

masterclass.ch

masterclass.cl

masterclass.am

masterclass.info

masterclass.it

masterclass.site

masterclass.se

masterclass.be

masterclass.co.uk

masterclass.dk

masterclass.courses

masterclass.co

masterclass.my

masterclass.ie

masterclass.ninja

masterclass.at

masterclass.com.hk

masterclass.de

masterclass.com.es

masterclass.com.mx

masterclass.az

masterclass.ng

masterclass.co.za

masterclass.lt

masterclass.us

masterclass.pl

masterclass.biz

masterclass.com.br

masterclass.hu

masterclass.eu

masterclass.edu.ge

masterclass.no

masterclass.team

masterclass.digital

masterclass.io

masterclass.al

masterclass.co.ke

masterclass.com.tr

masterclass.gr

masterclass.ca

masterclass.lv

masterclass.care

masterclass.kg

masterclass.jp

masterclass.co.id

masterclass.dev

masterclass.agency

masterclass.world

masterclass.cc

masterclass.com

masterclass.net

masterclass.bg

masterclass.media

masterclass.today

masterclass.fr

masterclass.uz

Similar names

DNS History

6 records (6 active, 0 former)

●NSariadne.ns.cloudflare.com2026-02-17 → 2026-06-04 · 2 obs

● 2026-02-17 01:24:20
● 2026-06-04 04:39:06

●NStom.ns.cloudflare.com2026-02-17 → 2026-06-04 · 2 obs

● 2026-02-17 01:24:20
● 2026-06-04 04:39:06

●A104.18.22.1072026-02-17 → 2026-06-04 · 2 obs

● 2026-02-17 01:24:20
● 2026-06-04 04:39:06

●A104.18.23.1072026-02-17 → 2026-06-04 · 2 obs

● 2026-02-17 01:24:20
● 2026-06-04 04:39:06

●A2606:4700::6812:166b2026-02-17 → 2026-06-04 · 2 obs

● 2026-02-17 01:24:20
● 2026-06-04 04:39:06

●A2606:4700::6812:176b2026-02-17 → 2026-06-04 · 2 obs

● 2026-02-17 01:24:20
● 2026-06-04 04:39:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...	-
masterclass.dev	tom.ns.cloudflare.com, ariadne.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.193.147

NS records: tom.ns.cloudflare.com, ariadne.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for masterclass.dev (unsigned zone)

⏱️ Timing

Total: 891ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.18.23.107, 104.18.22.107`
AAAA	2	`2606:4700::6812:166b, 2606:4700::6812:176b`
NS	2	`ariadne.ns.cloudflare.com, tom.ns.cloudflare.com`
TXT	5	`apple-domain-verification=Dwh77ggSYSJLv0, stripe-verification=a724da2600b32898d16a...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h2"]`
SOA	1	`ariadne.ns.cloudflare.com dns.cloudflare`

Analysis

Hierarchy

The parent domain of acceptance.masterclass.dev and www.masterclass.dev is masterclass.dev.

IP Addresses

With 4 IP addresses, masterclass.dev directs to 104.18.22.107, 104.18.23.107, 2606:4700::6812:166b and 2606:4700::6812:176b.

Among the host names that share IP numbers with masterclass.dev are zonnestroom.nl, www.sample-pro.com, ingest.insights.ninetailed.co and two others.

Name Servers

masterclass.dev is served by two delegated name servers, ariadne.ns.cloudflare.com and tom.ns.cloudflare.com.

masterclass.dev has the same name server delegation as a number of other domains, such as brightrock.co.za, 1kra34.cc, lawsnipe.com and two more.

masterclass.dev partially shares its NS delegation with several other domains, including sanpetevalley.net, express-pay.net, wooding5.com and two others.

These name servers regularly co-occur with the name servers kia.ns.cloudflare.com, anderson.ns.cloudflare.com and yadiel.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

The hostname ariadne.ns.cloudflare.com resolves to 108.162.194.225, 162.159.38.225, 172.64.34.225 and three additional IP addresses.

The hostname tom.ns.cloudflare.com resolves to 108.162.193.147, 172.64.33.147, 173.245.59.147 and three additional IP addresses.