classes.se - dns.ninja

`classes.se`

DNSSEC	⚠️ Not signed
A	31.15.10.30^{🇨🇿 ACTIVE24-AS31.15.8.0/21 CZ-ACTIVE24-NET2}
		PTR	`yono1.active24.cz`
NS	`ns1.bdm.microsoftonline.com` ⭐
		A	2603:1061:0:700::d0^{🇺🇸 Microsoft2603:1000::/25 MICROSOFT}
			PTR	`ns1-208.azure-dns.com`
		A	13.107.236.208^{🇺🇸 Microsoft13.104.0.0/14 MICROSOFT}
			PTR	`ns1-208.azure-dns.com`
NS	`ns2.bdm.microsoftonline.com`
		A	2620:1ec:8ec:700::d0^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns2-208.azure-dns.net`
		A	150.171.21.208^{🇺🇸 Microsoft150.171.0.0/16 MICROSOFT}
			PTR	`ns2-208.azure-dns.net`
NS	`ns3.bdm.microsoftonline.com` ⚠️ Not in parent delegation
		A	2a01:111:4000:700::d0^{🇬🇧 Microsoft2a01:111:4000::/36}
			PTR	`ns3-208.azure-dns.org`
		A	204.14.183.208^{🇺🇸 Microsoft204.14.180.0/22}
			PTR	`ns3-208.azure-dns.org`
NS	`ns4.bdm.microsoftonline.com` ⚠️ Not in parent delegation
		A	2620:1ec:bda:700::d0^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns4-208.azure-dns.info`
		A	208.84.5.208^{🇺🇸 Microsoft208.84.0.0/21 MICROSOFT}
			PTR	`ns4-208.azure-dns.info`
MX	`classes-se.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::6^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db4pr02cu00406.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::d^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db6pr03cu00105.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am3pr04cu00500.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::8^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as2pr05cu00100.inbound.protection.outlook.com`
		A	52.101.68.8^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-du0pr03cu00100.inbound.protection.outlook.com`
		A	52.101.68.16^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db4pr02cu00400.inbound.protection.outlook.com`
		A	52.101.73.8^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am0pr04cu00500.inbound.protection.outlook.com`
		A	52.101.73.30^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am7pr05cu00306.inbound.protection.outlook.com`
TXT	`mscid=xT7S4vGdBejTSWG44ySxEwI0Oq5ecnhb+vunts8SnVOka0dyyvjipMXEgi9nBmy8DqyLjvE...`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns1.bdm.microsoftonline.com`azuredns-hostmaster@microsoft.com serial=1

`se`

	DNSSEC	🔒 Signed (DS record present)
	NS	`catcher-in-the-rye.nic.se` ⭐
	NS	`a.ns.se`
	NS	`b.ns.se`
	NS	`c.ns.se`
	NS	`f.ns.se`
	NS	`g.ns.se`
	NS	`i.ns.se`
	NS	`m.ns.se`
	NS	`x.ns.se`
	NS	`y.ns.se`
	NS	`z.ns.se`
	TXT	`id:447689ba-6844-4716-8808-c383a8ea37e8`
	TXT	`SE zone update: 2026-07-12 00:32:06 +0000 (EPOCH 1783816326) (auto)`
	SOA	`catcher-in-the-rye.nic.se`registry-default@nic.se serial=1783816692

Same first word

classes.me

classes.eu

classes.co.il

classes.university

classes.training

classes.de

classes.com.au

classes.com

classes.ng

classes.net

classes.life

classes.com.br

classes.ws

classes.org

classes.se

classes.dance

classes.us

classes.ch

classes.miami

classes.ru

classes.at

classes.io

classes.com.hk

classes.guru

classes.ie

classes.ca

Similar names

cssales.com

cssales.co.uk

lessacs.fr

sealssc.com

cassels.org

cesslas.com

cassels.tv

lessacs.com

esclass.cn

cassels.ca

cassels.us

cassels.nz

cassels.me

cassels.se

scaless.com

cassels.net

cassels.co.nz

esclass.com

salescs.com

esclass.net

casessl.com

cassels.com

seclass.com

DNS History

7 records (6 active, 1 former)

●NSns1.bdm.microsoftonline.com2015-08-09 → 2026-07-12 · 2 obs

● 2015-08-09 05:06:44
● 2026-07-12 01:50:08

●NSns2.bdm.microsoftonline.com2015-08-09 → 2026-07-12 · 2 obs

● 2015-08-09 05:06:44
● 2026-07-12 01:50:08

●NSns3.bdm.microsoftonline.com2015-08-09 → 2026-07-12 · 2 obs

● 2015-08-09 05:06:44
● 2026-07-12 01:50:08

●NSns4.bdm.microsoftonline.com2015-08-09 → 2026-07-12 · 2 obs

● 2015-08-09 05:06:44
● 2026-07-12 01:50:08

●MXclasses-se.mail.protection.outlook.com2015-08-09 → 2026-07-12 · 2 obs

● 2015-08-09 05:06:44
● 2026-07-12 01:50:08

●A31.15.10.302026-03-27 → 2026-07-12 · 3 obs

○ 2017-03-15 09:00:50
● 2026-03-27 21:26:02
● 2026-07-12 01:50:08

○A46.51.204.1842015-08-09 → 2017-03-15 · 4 obs

● 2015-08-09 05:06:44
● 2017-03-15 09:00:50
○ 2026-03-27 21:26:02
○ 2026-07-12 01:50:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
se	x.ns.se, a.ns.se, b.ns.se, m.ns.se...	-
classes.se	ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com	-

✅ Authoritative Response

Server:13.107.236.208

NS records: ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classes.se (unsigned zone)

⏱️ Timing

Total: 716ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`31.15.10.30`
NS	4	`ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com...`
MX	1	`classes-se.mail.protection.outlook.com (`
TXT	2	`mscid=xT7S4vGdBejTSWG44ySxEwI0Oq5ecnhb+v, v=spf1 include:spf.protection.outlook.co`
SOA	1	`ns1.bdm.microsoftonline.com azuredns-hos`

Analysis

IP Addresses

classes.se resolves to one IP address: 31.15.10.30.

spalux.eu, nordenstrale.com, www.globalrunners.se and two other host names share IP numbers with classes.se.

Name Servers

The authoritative name servers for classes.se are ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com and ns4.bdm.microsoftonline.com.

There is at least partial name server overlap between classes.se and other domains — mimox.com, icasys.de, vandanaairtravels.com and two more among them.

All four hostnames — ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com and ns4.bdm.microsoftonline.com — resolve to two IP numbers apiece: ns1.bdm.microsoftonline.com to 13.107.236.208 and 2603:1061:0:700::d0; ns2.bdm.microsoftonline.com to 150.171.21.208 and 2620:1ec:8ec:700::d0; ns3.bdm.microsoftonline.com to 204.14.183.208 and 2a01:111:4000:700::d0; ns4.bdm.microsoftonline.com to 208.84.5.208 and 2620:1ec:bda:700::d0.

Mail Servers

Mail for classes.se is handled by a single mail server, classes-se.mail.protection.outlook.com.

classes-se.mail.protection.outlook.com resolves to 8 IP addresses — 52.101.68.8, 52.101.68.16, 52.101.73.8 and 5 others.