`masterclass.io`

DNSSEC	⚠️ Not signed
NS	`ns1.gandi.net` ⭐
		A	2001:4b98:aaaa::2^{🇫🇷 GANDI-LIVEDNS}
			PTR	`ns-1-a.gandi.net`
		A	173.246.100.2^{🇺🇸 GANDI-LIVEDNS}
			PTR	`ns-1-a.gandi.net`
NS	`ns-138-b.gandi.net`
		A	2001:4b98:aaab::8b^{🇫🇷 GANDI-LIVEDNS}
			PTR	`ns-138-b.gandi.net`
		A	213.167.230.139^{🇫🇷 GANDI-LIVEDNS}
			PTR	`ns-138-b.gandi.net`
NS	`ns-211-a.gandi.net`
		A	2001:4b98:aaaa::d4^{🇫🇷 GANDI-LIVEDNS}
			PTR	`ns-211-a.gandi.net`
		A	173.246.100.212^{🇺🇸 GANDI-LIVEDNS}
			PTR	`ns-211-a.gandi.net`
NS	`ns-64-c.gandi.net`
		A	2604:3400:aaac::41^{🇺🇸 GANDI-LIVEDNS}
			PTR	`ns-64-c.gandi.net`
		A	217.70.187.65^{🇫🇷 GANDI-LIVEDNS}
			PTR	`ns-64-c.gandi.net`
MX	`spool.mail.gandi.net` ⭐
		A	2001:4b98:e00::1^{🇫🇷 GANDI-AS}
			PTR	`spool.mail.gandi.net`
		A	217.70.178.1^{🇫🇷 GANDI-AS}
			PTR	`spool.mail.gandi.net`
MX	`fb.mail.gandi.net`⁽⁵⁰⁾
		A	2001:4b98:dc4:8::215^{🇫🇷 GANDI-AS}
			PTR	`spool6.mail.gandi.net`
		A	2001:4b98:dc4:8::216^{🇫🇷 GANDI-AS}
			PTR	`spool7.mail.gandi.net`
		A	2001:4b98:dc4:8::217^{🇫🇷 GANDI-AS}
			PTR	`spool8.mail.gandi.net`
		A	217.70.178.215^{🇫🇷 GANDI-AS}
			PTR	`spool6.mail.gandi.net`
		A	217.70.178.216^{🇫🇷 GANDI-AS}
			PTR	`spool7.mail.gandi.net`
		A	217.70.178.217^{🇫🇷 GANDI-AS}
			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=1771459200

`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=1771291657

Up

aide.masterclass.io

Same first word

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Similar names

DNS History

28 records (6 active, 22 former)

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

○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-02-21 14:04:30

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

○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-02-21 14:04:30

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

○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

○ 2018-05-11 05:37:00
● 2026-02-21 11:03:42
● 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

●MXfb.mail.gandi.net2018-05-11 → 2026-02-21 · 2 obs

● 2018-05-11 05:37:00
● 2026-02-21 14:04:30

●MXspool.mail.gandi.net2018-05-11 → 2026-02-21 · 2 obs

● 2018-05-11 05:37:00
● 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

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

● 2018-05-11 05:37:00
○ 2026-02-21 11:03:42
○ 2026-02-21 14:04:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
masterclass.io	ns-138-b.gandi.net, ns-64-c.gandi.net, ns-211-a.gandi.net	-

✅ Authoritative Response

Server: 213.167.230.139

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for masterclass.io (unsigned zone)

⏱️ Timing

Total: 246ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	3	`ns-138-b.gandi.net, ns-211-a.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`

AI analysis

masterclass.io is the parent of aide.masterclass.io.

masterclass.io is delegated to four name servers: ns-138-b.gandi.net, ns-211-a.gandi.net, ns-64-c.gandi.net and ns1.gandi.net.

masterclass.io shares some name servers with other domains, for example seescompany.fi, joursdhistoire.org, auslander.tv, edi-serviceprovider.com and getyourguide.com.tr.

These name servers are often used together with ns-225-a.gandi.net, ns-222-a.gandi.net, ns-54-c.gandi.net, ns-70-b.gandi.net, ns-108-a.gandi.net, ns-201-c.gandi.net, ns-212-c.gandi.net, ns-129-c.gandi.net and ns-84-a.gandi.net.

Host names with two IP numbers

Two IPs per host:

ns-138-b.gandi.net points to 2001:4b98:aaab::8b and 213.167.230.139

ns-211-a.gandi.net points to 2001:4b98:aaaa::d4 and 173.246.100.212

ns-64-c.gandi.net points to 2604:3400:aaac::41 and 217.70.187.65

ns1.gandi.net points to 2001:4b98:aaaa::2 and 173.246.100.2

masterclass.io is served by two mail servers: fb.mail.gandi.net and spool.mail.gandi.net.

masterclass.io shares the mail server setup with other domains, for example balconi.nl, ictweb.net, weprive.com, ol-feminin.info and kaiju.co.

masterclass.io shares some mail servers with other domains, at least partially; for instance riot.network, methyltransferase.org, osteogk.com, super-lovers.fr and slsmedia.net.

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

Host names with six IP numbers:

fb.mail.gandi.net points to 2001:4b98:dc4:8::215, 2001:4b98:dc4:8::216, 2001:4b98:dc4:8::217, 217.70.178.215, 217.70.178.216 and 217.70.178.217.

Host names with two IP numbers:

spool.mail.gandi.net points to 2001:4b98:e00::1 and 217.70.178.1.

masterclass.io - robtex.com

masterclass.io

io

Up

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

AI analysis

`masterclass.io`

`io`