masterclass.io - dns.ninja

masterclass.io

DNSSEC⚠️ Not signed
NSns1.gandi.net ⭐
A2001:4b98:aaaa::2🇫🇷 GANDI-LIVEDNS2001:4b98:aaaa::/48 GANDI is an ICANN accredited registrar and Cloud services provider
PTRns-1-a.gandi.net
A173.246.100.2🇺🇸 GANDI-LIVEDNS173.246.100.0/24 Gandi LiveDNS A
PTRns-1-a.gandi.net
NSns-138-b.gandi.net
A2001:4b98: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
PTRns-138-b.gandi.net
A213.167.230.139🇫🇷 GANDI-LIVEDNS213.167.230.0/24 GANDI is an ICANN accredited registrar and Cloud services provider
PTRns-138-b.gandi.net
NSns-211-a.gandi.net
A2001:4b98:aaaa::d4🇫🇷 GANDI-LIVEDNS2001:4b98:aaaa::/48 GANDI is an ICANN accredited registrar and Cloud services provider
PTRns-211-a.gandi.net
A173.246.100.212🇺🇸 GANDI-LIVEDNS173.246.100.0/24 Gandi LiveDNS A
PTRns-211-a.gandi.net
NSns-64-c.gandi.net
A2604:3400:aaac::41🇺🇸 GANDI-LIVEDNS2604:3400:aaac::/48 Gandi US Inc.
PTRns-64-c.gandi.net
A217.70.187.65🇫🇷 GANDI-LIVEDNS217.70.187.0/24 GANDI is an ICANN accredited registrar and Cloud services provider
PTRns-64-c.gandi.net
MXspool.mail.gandi.net ⭐
A2001:4b98: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
PTRspool.mail.gandi.net
A217.70.178.1🇫🇷 GANDI-AS217.70.176.0/20 GANDI is an ICANN accredited registrar for more information: Web: http://www.gandi.net
PTRspool.mail.gandi.net
MXfb.mail.gandi.net(50)
A2001:4b98: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
PTRspool6.mail.gandi.net
A2001:4b98: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
PTRspool7.mail.gandi.net
A2001:4b98: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
PTRspool8.mail.gandi.net
A217.70.178.215🇫🇷 GANDI-AS217.70.176.0/20 GANDI is an ICANN accredited registrar for more information: Web: http://www.gandi.net
PTRspool6.mail.gandi.net
A217.70.178.216🇫🇷 GANDI-AS217.70.176.0/20 GANDI is an ICANN accredited registrar for more information: Web: http://www.gandi.net
PTRspool7.mail.gandi.net
A217.70.178.217🇫🇷 GANDI-AS217.70.176.0/20 GANDI is an ICANN accredited registrar for more information: Web: http://www.gandi.net
PTRspool8.mail.gandi.net
TXTv=spf1 include:_mailcust.gandi.net ?all
TXTALIAS for masterclass.io.herokudns.com
SOAns1.gandi.nethostmaster@gandi.net serial=1780531200

io

DNSSEC🔒 Signed (DS record present)
NSa0.nic.io ⭐
NSa2.nic.io
NSb0.nic.io
NSc0.nic.io
SOAa0.nic.iohostmaster@donuts.email serial=1780547370

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.agency
masterclass.world
masterclass.cc
masterclass.com
masterclass.net
masterclass.bg
masterclass.media
masterclass.today
masterclass.fr
masterclass.uz

Similar names

classmaster.in
classmaster.ru
slamactress.com
classmaster.co.uk
esmartclass.net
smartscales.ru
classstream.online
classmaster.ca
esmartclass.com
scarletmass.com
classmaster.eu
classmaster.com
classstream.com
classmaster.cz
smtcarsales.com

DNS History

28 records (6 active, 22 former)

20192020202120222023202420252026NSns-138-b.gandi.netns-211-a.gandi.netns-64-c.gandi.netns1.gandi.netns1.dnsimple.comns2.dnsimple.comns3.dnsimple.comns4.dnsimple.comMXfb.mail.gandi.netspool.mail.gandi.netA34.243.188.6134.248.164.13134.249.85.2434.252.20.18734.253.18.11852.16.242.3552.17.186.2552.17.87.18252.210.32.23552.211.4.1152.212.178.12452.215.92.11952.30.103.11952.31.160.154.171.20.7154.194.152.654.229.165.19554.76.58.198
●NSns-138-b.gandi.net2026-02-21 → 2026-06-04 · 3 obs
○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-06-04 04:38:00
●NSns-211-a.gandi.net2026-02-21 → 2026-06-04 · 3 obs
○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-06-04 04:38:00
●NSns-64-c.gandi.net2026-02-21 → 2026-06-04 · 3 obs
○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-06-04 04:38:00
○NSns1.dnsimple.com2018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
●NSns1.gandi.net2026-02-21 → 2026-06-04 · 3 obs
○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-06-04 04:38:00
○NSns2.dnsimple.com2018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○NSns3.dnsimple.com2018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○NSns4.dnsimple.com2018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
●MXfb.mail.gandi.net2018-05-11 → 2026-06-04 · 2 obs
● 2018-05-11 05:37:00
● 2026-06-04 04:38:00
●MXspool.mail.gandi.net2018-05-11 → 2026-06-04 · 2 obs
● 2018-05-11 05:37:00
● 2026-06-04 04:38:00
○A34.243.188.612018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A34.248.164.1312018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A34.249.85.242018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A34.252.20.1872018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A34.253.18.1182018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A52.16.242.352018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A52.17.186.252018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A52.17.87.1822018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A52.210.32.2352018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A52.211.4.112018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A52.212.178.1242018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A52.215.92.1192018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A52.30.103.1192018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A52.31.160.12018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A54.171.20.712018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A54.194.152.62018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A54.229.165.1952018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00
○A54.76.58.1982018-05-11 → 2018-05-11 · 3 obs
● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-06-04 04:38:00

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
iob0.nic.io, a0.nic.io, a2.nic.io, c0.nic.io-
masterclass.ions-64-c.gandi.net, ns-211-a.gandi.net, ns-138-b.gandi.net-

✅ Authoritative Response

Server:213.167.230.139

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for masterclass.io (unsigned zone)

⏱️ Timing

Total: 867ms | Queries: -

📄 Records

TypeCountSample Data
NS3ns-138-b.gandi.net, ns-64-c.gandi.net...
MX2fb.mail.gandi.net (pri: 50), spool.mail.gandi.net (pri: 10)
TXT2v=spf1 include:_mailcust.gandi.net ?all, ALIAS for masterclass.io.herokudns.com
SOA1ns1.gandi.net hostmaster.gandi.net

Analysis

Hierarchy

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

Name Servers

DNS for masterclass.io is handled by 4 name servers: 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.

It is common to see these name servers paired with ns-54-c.gandi.net, ns-216-a.gandi.net, ns-222-a.gandi.net and six other name servers.

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: riot.network, methyltransferase.org, osteogk.com 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 resolves to 217.70.178.215, 217.70.178.216 and 217.70.178.217, along with three other IP addresses.

Host names pointing to two IP addresses:

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