teach.dk

📜 Historical scan 2026-06-17 19:59:16 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

teach.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 19 February 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 94.231.103.100 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by teach-dk.mail.protection.outlook.com, xxxxx.mail.eo.outlook.com and 1 more. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

4 records 46ms

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 Records#

1 records 47ms

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

📧 MX Records#

3 records 44ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	teach-dk.mail.protection.outlook.com	2a01:111:f403:ca09:: 2a01:111:f403:ca09::1 2a01:111:f403:ca09::2 2a01:111:f403:ca09::20 52.101.68.21 52.101.73.1 52.101.73.15 52.101.73.4	mail-am3pr04cu00500.inbound.protection.outlook.com mail-as9pr07cu00301.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-db4pr02cu00205.inbound.protection.outlook.com mail-am3pr04cu00501.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-am0pr83cu00404.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	—	xxxxx.mail.eo.outlook.com	2a01:111:f403:c927::1 2a01:111:f403:f804::2 2a01:111:f403:f902::1 2a01:111:f403:f90d:: 52.101.11.13 52.101.11.2 52.101.11.9 52.101.40.1	mail-bn8pr05cu00301.inbound.protection.outlook.com mail-co1pr05cu00402.inbound.protection.outlook.com mail-bl2pr02cu00101.inbound.protection.outlook.com mail-sn1pr0501cu00200.inbound.protection.outlook.com mail-sn1pr0501cu00205.inbound.protection.outlook.com mail-sn1pr03cu00102.inbound.protection.outlook.com mail-sn1pr02cu00101.inbound.protection.outlook.com mail-cy4pr03cu00101.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	—	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 Records#

2 records 53ms

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

📝 TXT Records#

4 records 173ms

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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-12 22:52:58

www	94.231.103.100 (AS48854) (address records, no CNAME)
www vs bare domain	Same network teach.dk: 94.231.103.100 (AS48854) www.teach.dk: 94.231.103.100 (AS48854)
Wildcard	No
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

60ms

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

🏷️ SOA#

42ms

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#

WHOIS fetched 2026-10-18 07:31:48

Field	Value
Registrar	Simply.com A/S
Registered	2014-02-19
Expires	2027-02-28 (131d)

🔗 Same registrant#

0 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

46ms

47ms

44ms

AAAA

45ms

TXT

173ms

CAA

46ms

HTTPS

45ms

TLSA

4040ms

SOA

42ms

MTA-STS

51ms

DNSSEC

60ms

SRV

53ms

Total

4912ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 22:52:57	2337ms	4 NS 1 A 3 MX	🔒 Secure
2026-10-04 06:48:49	1185ms	4 NS 1 A 3 MX	🔒 Secure
2026-10-01 14:16:42	4122ms	4 NS 1 A 3 MX	🔒 Secure
2026-08-26 03:48:44	4915ms	4 NS 1 A 3 MX	🔒 Secure
2026-06-17 19:59:16 shown	4912ms	4 NS 1 A 3 MX	🔒 Secure