teach.dk DNS records

🖥️ Nameservers4 records 36ms

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 41ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
94.231.103.100	600s	dnsforward.simply.com	AS48854	team.blue Denmark A/S	94.231.96.0/20	🇩🇰 Denmark	—

📧 MX Records3 records 43ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	teach-dk.mail.protection.outlook.com	2a01:111:f403:ca04::7 2a01:111:f403:ca04::9 2a01:111:f403:ca09::20 2a01:111:f403:ca48::8 52.101.103.140 52.101.103.143 52.101.73.26 52.101.73.6	mail-db4pr02cu00307.inbound.protection.outlook.com mail-db7pr03cu00601.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-miypr02cu00204.inbound.protection.outlook.com mail-miypr03cu00107.inbound.protection.outlook.com mail-as9pr05cu01302.inbound.protection.outlook.com mail-am6pr04cu00306.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
10	3600s	xxxxx.mail.eo.outlook.com	2a01:111:f403:c927:: 2a01:111:f403:c92c::1 2a01:111:f403:c931::1 2a01:111:f403:f908::2 52.101.60.182 52.101.8.46 52.101.8.51 52.101.9.14	mail-bn6pr21cu00500.inbound.protection.outlook.com mail-dm6pr03cu00401.inbound.protection.outlook.com mail-sa9pr03cu00201.inbound.protection.outlook.com mail-bn8pr05cu00102.inbound.protection.outlook.com mail-bn3pr0301cu00206.inbound.protection.outlook.com mail-dm6pr05cu00406.inbound.protection.outlook.com mail-dm1pr04cu00203.inbound.protection.outlook.com mail-bl0pr03cu00206.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
32767	3600s	ms90472701.msv1.invalid	—	—	—

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.8

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records2 records 60ms

Service	Priority	Weight	Port	Target
_sip._tcp	100	1	5061	sipfed.online.lync.com
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records4 records 138ms

TXT Record
google-site-verification=eRySw__4Rp_xh7SKl0hGl15f3yk-KArlK1ZfSdtrKFQ
google-site-verification=XaVQiBOzNXTweXcTSPb37C-m-l_hSALxjhhvT9iy6_c
MS=ms60773839
v=spf1 include:spf.protection.outlook.com include:spf.mandrillapp.com -all

✉️ SPF

Policy	Record (teach.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:spf.mandrillapp.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)

🔐 DNSSEC74ms

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

🏷️ SOA0ms

Field	Value
Serial	2021060300
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

36ms

A

41ms

MX

43ms

AAAA

63ms

TXT

138ms

CAA

49ms

HTTPS

31ms

TLSA

4036ms

SOA

0ms

MTA-STS

76ms

DNSSEC

74ms

SRV

60ms

Total

4915ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-26 03:48:44	4915ms	4 NS 1 A 3 MX	🔒 Secure	View
2026-06-17 19:59:16	4912ms	4 NS 1 A 3 MX	🔒 Secure	View