esb-intschool.dk DNS records

🖥️ Nameservers2 records 180ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records1 records 197ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
62.171.173.250	7200s	vmi589344.contaboserver.net	AS51167	Contabo GmbH	62.171.128.0/18	🇫🇷 France	Lauterbourg

📧 MX Records1 records 295ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	esbjerginternationalschool-dk.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::9 2a01:111:f403:ca04::e 2a01:111:f403:ca09:: 52.101.68.16 52.101.73.153 52.101.73.22 52.101.73.26	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db7pr03cu00601.inbound.protection.outlook.com mail-db8pr02cu00106.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-as8pr05cu00401.inbound.protection.outlook.com mail-am7pr05cu00106.inbound.protection.outlook.com mail-as9pr05cu01302.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.40
🔶 Autoconfig	62.171.173.250

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 389ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records1 records 948ms

TXT Record
v=spf1 include:spf.protection.outlook.com a:4679.submission.antispamcloud.com a:release.antispamcloud.com -all

✉️ SPF

Policy	Record (esb-intschool.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com a:4679.submission.antispamcloud.com a:release.antispamcloud.com -all

📨 DMARC

✗ No DMARC record — mail spoofing not restricted

📬 MTA-STS

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records

✗ No CAA records — any CA may issue certificates

🔗 TLSA / DANE

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC514ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA0ms

Field	Value
Serial	2026081101
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

180ms

A

197ms

MX

295ms

AAAA

208ms

TXT

948ms

CAA

251ms

HTTPS

194ms

TLSA

673ms

SOA

0ms

MTA-STS

274ms

DNSSEC

514ms

SRV

389ms

Total

4561ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-12 14:49:11	4561ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-18 10:17:10	9193ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-14 02:58:45	965ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-08 19:54:01	17584ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-20 19:38:14	1046ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-17 08:15:18	1481ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-17 08:15:16	1468ms	2 NS 1 A 1 MX	🔒 Secure	View