esbjergrealskole.dk DNS records

🖥️ Nameservers4 records 21ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S
ns4.simply.com	91.197.248.80	ns4.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records1 records 22ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
76.76.21.21	3600s	—	AS16509	Amazon.com, Inc.	76.76.21.0/24	🇺🇸 United States	Walnut

📧 MX Records1 records 25ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	esbjergrealskole-dk.mail.protection.outlook.com	2a01:111:f403:ca04::d 2a01:111:f403:ca09::1 2a01:111:f403:ca09::2 2a01:111:f403:ca09::f 52.101.103.137 52.101.103.140 52.101.68.29 52.101.73.28	mail-db6pr03cu00105.inbound.protection.outlook.com mail-as9pr07cu00301.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-am7pr05cu00307.inbound.protection.outlook.com mail-miypr02cu00101.inbound.protection.outlook.com mail-miypr02cu00204.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-am7pr05cu00204.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 → 40.104.116.56
🔶 Autoconfig	maildiscover.simply.com → 94.231.108.222

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records2 records 56ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	maildiscover.simply.com
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records4 records 72ms

TXT Record
google-site-verification=uN3-xHeXqLXewC7d79NnSj_5COxKbnXDi-L9bAN7ktU
MS=ms76565667
P-PbBNWNL9UF
v=spf1 +a +mx +ip4:77.66.117.52 +a:sendgrid.net +mx:sendgrid.net +include:spf.protection.outlook.com +include:sendgrid.net +include:eu.mailgun.org include:spf.permido.com -all

✉️ SPF

Policy	Record (esbjergrealskole.dk)
-all (hard fail)	v=spf1 +a +mx +ip4:77.66.117.52 +a:sendgrid.net +mx:sendgrid.net +include:spf.protection.outlook.com +include:sendgrid.net +include:eu.mailgun.org include:spf.permido.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)

🔐 DNSSEC97ms

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

🏷️ SOA0ms

Field	Value
Serial	2026082800
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

21ms

A

22ms

MX

25ms

AAAA

19ms

TXT

72ms

CAA

28ms

HTTPS

23ms

TLSA

1055ms

SOA

0ms

MTA-STS

48ms

DNSSEC

97ms

SRV

56ms

Total

1548ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-29 14:16:30	1548ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-06-28 06:19:48	983ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-06-23 09:07:10	1182ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-17 08:21:27	677ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-06-17 08:20:48	892ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-06-17 08:20:36	1779ms	4 NS 1 A 1 MX	🔒 Secure	View