masterclass.io - dns.ninja

`masterclass.io`

DNSSEC	⚠️ Not signed
NS	`ns1.gandi.net` ⭐
		A	2001:4b98:aaaa::2^{🇫🇷 GANDI-LIVEDNS2001:4b98:aaaa::/48 GANDI is an ICANN accredited registrar and Cloud services provider}
			PTR	`ns-1-a.gandi.net`
		A	173.246.100.2^{🇺🇸 GANDI-LIVEDNS173.246.100.0/24 Gandi LiveDNS A}
			PTR	`ns-1-a.gandi.net`
NS	`ns-138-b.gandi.net`
		A	2001:4b98:aaab::8b^{🇫🇷 GANDI-LIVEDNS2001:4b98:aaab::/48 GANDI is an ICANN accredited registrar GANDI is a virtual server provider for more information: Web: http://www.gandi.net}
			PTR	`ns-138-b.gandi.net`
		A	213.167.230.139^{🇫🇷 GANDI-LIVEDNS213.167.230.0/24 GANDI is an ICANN accredited registrar and Cloud services provider}
			PTR	`ns-138-b.gandi.net`
NS	`ns-211-a.gandi.net`
		A	2001:4b98:aaaa::d4^{🇫🇷 GANDI-LIVEDNS2001:4b98:aaaa::/48 GANDI is an ICANN accredited registrar and Cloud services provider}
			PTR	`ns-211-a.gandi.net`
		A	173.246.100.212^{🇺🇸 GANDI-LIVEDNS173.246.100.0/24 Gandi LiveDNS A}
			PTR	`ns-211-a.gandi.net`
NS	`ns-64-c.gandi.net`
		A	2604:3400:aaac::41^{🇺🇸 GANDI-LIVEDNS2604:3400:aaac::/48 Gandi US Inc.}
			PTR	`ns-64-c.gandi.net`
		A	217.70.187.65^{🇫🇷 GANDI-LIVEDNS217.70.187.0/24 GANDI is an ICANN accredited registrar and Cloud services provider}
			PTR	`ns-64-c.gandi.net`
MX	`spool.mail.gandi.net` ⭐
		A	2001:4b98:e00::1^{🇫🇷 GANDI-AS2001:4b98::/32 GANDI is an ICANN accredited registrar GANDI is a virtual server provider for more information: Web: http://www.gandi.net}
			PTR	`spool.mail.gandi.net`
		A	217.70.178.1^{🇫🇷 GANDI-AS217.70.176.0/20 GANDI is an ICANN accredited registrar for more information: Web: http://www.gandi.net}
			PTR	`spool.mail.gandi.net`
MX	`fb.mail.gandi.net`⁽⁵⁰⁾
		A	2001:4b98:dc4:8::215^{🇫🇷 GANDI-AS2001:4b98::/32 GANDI is an ICANN accredited registrar GANDI is a virtual server provider for more information: Web: http://www.gandi.net}
			PTR	`spool6.mail.gandi.net`
		A	2001:4b98:dc4:8::216^{🇫🇷 GANDI-AS2001:4b98::/32 GANDI is an ICANN accredited registrar GANDI is a virtual server provider for more information: Web: http://www.gandi.net}
			PTR	`spool7.mail.gandi.net`
		A	2001:4b98:dc4:8::217^{🇫🇷 GANDI-AS2001:4b98::/32 GANDI is an ICANN accredited registrar GANDI is a virtual server provider for more information: Web: http://www.gandi.net}
			PTR	`spool8.mail.gandi.net`
		A	217.70.178.215^{🇫🇷 GANDI-AS217.70.176.0/20 GANDI is an ICANN accredited registrar for more information: Web: http://www.gandi.net}
			PTR	`spool6.mail.gandi.net`
		A	217.70.178.216^{🇫🇷 GANDI-AS217.70.176.0/20 GANDI is an ICANN accredited registrar for more information: Web: http://www.gandi.net}
			PTR	`spool7.mail.gandi.net`
		A	217.70.178.217^{🇫🇷 GANDI-AS217.70.176.0/20 GANDI is an ICANN accredited registrar for more information: Web: http://www.gandi.net}
			PTR	`spool8.mail.gandi.net`
TXT	`v=spf1 include:_mailcust.gandi.net ?all`
TXT	`ALIAS for masterclass.io.herokudns.com`
SOA	`ns1.gandi.net`hostmaster@gandi.net serial=1784764800

`io`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.nic.io` ⭐
	NS	`a2.nic.io`
	NS	`b0.nic.io`
	NS	`c0.nic.io`
	SOA	`a0.nic.io`hostmaster@donuts.email serial=1784913660

Subdomains

aide.masterclass.io

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.world

masterclass.cc

masterclass.com

masterclass.net

masterclass.bg

masterclass.media

masterclass.today

masterclass.fr

masterclass.uz

masterclass.je

Similar names

DNS History

28 records (6 active, 22 former)

●NSns-138-b.gandi.net2026-02-21 → 2026-07-24 · 3 obs

○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-07-24 17:51:24

●NSns-211-a.gandi.net2026-02-21 → 2026-07-24 · 3 obs

○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-07-24 17:51:24

●NSns-64-c.gandi.net2026-02-21 → 2026-07-24 · 3 obs

○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-07-24 17:51:24

○NSns1.dnsimple.com2018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

●NSns1.gandi.net2026-02-21 → 2026-07-24 · 3 obs

○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-07-24 17:51:24

○NSns2.dnsimple.com2018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○NSns3.dnsimple.com2018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○NSns4.dnsimple.com2018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

●MXfb.mail.gandi.net2018-05-11 → 2026-07-24 · 2 obs

● 2018-05-11 05:37:00
● 2026-07-24 17:51:24

●MXspool.mail.gandi.net2018-05-11 → 2026-07-24 · 2 obs

● 2018-05-11 05:37:00
● 2026-07-24 17:51:24

○A34.243.188.612018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A34.248.164.1312018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A34.249.85.242018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A34.252.20.1872018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A34.253.18.1182018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A52.16.242.352018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A52.17.186.252018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A52.17.87.1822018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A52.210.32.2352018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A52.211.4.112018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A52.212.178.1242018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A52.215.92.1192018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A52.30.103.1192018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A52.31.160.12018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A54.171.20.712018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A54.194.152.62018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A54.229.165.1952018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

○A54.76.58.1982018-05-11 → 2018-05-11 · 3 obs

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-07-24 17:51:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
io	a0.nic.io, a2.nic.io, b0.nic.io, c0.nic.io	-
masterclass.io	ns-211-a.gandi.net, ns-138-b.gandi.net, ns-64-c.gandi.net	-

✅ Authoritative Response

Server:217.70.187.65

NS records: ns-211-a.gandi.net, ns-138-b.gandi.net, ns-64-c.gandi.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for masterclass.io (unsigned zone)

⏱️ Timing

Total: 1603ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	3	`ns-211-a.gandi.net, ns-64-c.gandi.net...`
MX	2	`fb.mail.gandi.net (pri: 50), spool.mail.gandi.net (pri: 10)`
TXT	2	`v=spf1 include:_mailcust.gandi.net ?all, ALIAS for masterclass.io.herokudns.com`
SOA	1	`ns1.gandi.net hostmaster.gandi.net`

Analysis

Hierarchy

aide.masterclass.io is a subdomain of masterclass.io.

Name Servers

Four name servers handle the delegation for masterclass.io: ns-138-b.gandi.net, ns-211-a.gandi.net, ns-64-c.gandi.net and ns1.gandi.net.

The name servers of masterclass.io overlap at least partially with those of other domains — among them joursdhistoire.org, auslander.tv, edi-serviceprovider.com and two more.

These name servers commonly appear in delegations together with ns-54-c.gandi.net, ns-138-a.gandi.net, ns-216-a.gandi.net and 6 other.

Each of the four hosts ns-138-b.gandi.net, ns-211-a.gandi.net, ns-64-c.gandi.net and ns1.gandi.net has two IP addresses. ns-138-b.gandi.net points to 213.167.230.139 and 2001:4b98:aaab::8b. ns-211-a.gandi.net points to 173.246.100.212 and 2001:4b98:aaaa::d4. ns-64-c.gandi.net points to 217.70.187.65 and 2604:3400:aaac::41. ns1.gandi.net points to 173.246.100.2 and 2001:4b98:aaaa::2.

Mail Servers

masterclass.io uses two mail servers, fb.mail.gandi.net and spool.mail.gandi.net.

The mail server setup of masterclass.io matches that of other domains such as balconi.nl, ictweb.net, weprive.com and two others.

At least some of the mail servers used by masterclass.io are shared with other domains: huitinterieur.com, riot.network, methyltransferase.org and two others among them.

The mail servers aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com are commonly used alongside these mail servers.

Hosts with 6 IP addresses each:

fb.mail.gandi.net has IP addresses 217.70.178.215, 217.70.178.216 and 217.70.178.217, plus 3 other.

Host names pointing to two IP addresses:

spool.mail.gandi.net has two IP addresses: 217.70.178.1 and 2001:4b98:e00::1.