osterskov.dk

📜 Historical scan 2026-10-04 06:03:06 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

osterskov.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 7 June 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 3.125.228.140 is hosted by Amazon.com, Inc. (AS16509) in Germany. Mail is handled by osterskov-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a 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 49ms

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 48ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
3.125.228.140	237s	ec2-3-125-228-140.eu-central-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	3.96.0.0/11	🇩🇪 Germany	Frankfurt am Main

📧 MX Records#

1 records 32ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	osterskov-dk.mail.protection.outlook.com	2a01:111:f403:ca04::b 2a01:111:f403:ca09::28 2a01:111:f403:ca48::a 2a01:111:f403:ca48::e 52.101.103.39 52.101.68.12 52.101.68.29 52.101.68.39	mail-dbbpr03cu00103.inbound.protection.outlook.com mail-am6pr02cu00300.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-miypr03cu00206.inbound.protection.outlook.com mail-miypr05cu00207.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-db7pr03cu00607.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 → 52.98.149.136

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 66ms

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

📝 TXT Records#

4 records 124ms

TXT Record
adobe-idp-site-verification=8f4b49aba7f606cbeef78192d3e42cf1cbd588414658d13c5b55fd3e80ad41ab
MS=ms90822524
uvmid=823304
v=spf1 include:spf.protection.outlook.com ip4:83.136.91.38 -all

✉️ SPF#

Policy	Record (osterskov.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com ip4:83.136.91.38 -all

📨 DMARC#

Policy	Record (_dmarc.osterskov.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:dmarc-feedback@educant.dk; aspf=r

📬 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 19:18:03

www	3.125.228.140 (AS16509) (address records, no CNAME)
www vs bare domain	Same network osterskov.dk: 3.125.228.140 (AS16509) www.osterskov.dk: 3.125.228.140 (AS16509)
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

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector2	selector2-osterskov-dk._domainkey.osterskovefterskole.onmicrosoft.com	RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

57ms

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

🏷️ SOA#

14ms

Field	Value
Serial	2026093000
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 2026-10-14 22:02:24

Field	Value
Registrar	Simply.com A/S
Registered	2005-06-07
Expires	2027-06-30 (255d)

🔗 Same registrant#

56 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).

Domain	Registrar
aabenthus-aau-cph.dk	Simply.com A/S
allhandsondeck.dk	Simply.com A/S
blivlandmandinord.dk	Simply.com A/S
brejningefterskole.dk	Simply.com A/S
c-y1.dk	Punktum dk A/S (direct)
c-y10.dk	Punktum dk A/S (direct)
c-y5.dk	Punktum dk A/S (direct)
c-y7.dk	Punktum dk A/S (direct)
college360-aabent-hus-24-7.dk	Simply.com A/S
crmeducation365.dk	Simply.com A/S
detailhandelsuddannelsen.dk	Simply.com A/S
dev-khs.dk	Punktum dk A/S (direct)
distriktsfesten.dk	Simply.com A/S
dkskills.dk	Simply.com A/S
edura.dk	Simply.com A/S
elevitoptoy.dk	Simply.com A/S
elevplads.dk	Punktum dk A/S (direct)
elevpris.dk	Simply.com A/S
farmakonomuddannelsen-events.dk	Simply.com A/S
graduates.dk	Punktum dk A/S (direct)
grindstedcampusgymnasium.dk	Punktum dk A/S (direct)
group-young.dk	Punktum dk A/S (direct)
groupyoung.dk	Punktum dk A/S (direct)
hjemly.dk	Simply.com A/S
hjemlyidraetsefterskole.dk	Simply.com A/S
hmi-virtuel.dk	Simply.com A/S
hvadfandenlaverde.dk	Simply.com A/S
hvidovreepx.dk	Punktum dk A/S (direct)
job-eventyrsport.dk	Simply.com A/S
jysktalent.dk	Simply.com A/S
karriere-jyskrejsebureau.dk	Simply.com A/S
karriereelev.dk	Punktum dk A/S (direct)
kggym-virtuelt.dk	Simply.com A/S
longstoryshort.dk	Simply.com A/S
mejlbyefterskole.dk	Simply.com A/S
mks-virtuelt.dk	Simply.com A/S
nettotrainee.dk	Simply.com A/S
norregorienteringsaften.dk	Simply.com A/S
ov-bogholderi.dk	Simply.com A/S
ramrigtigt.dk	Punktum dk A/S (direct)
rg-event.dk	Simply.com A/S
shippingtalent.dk	Punktum dk A/S (direct)
simac-uddannelser.dk	Simply.com A/S
stemcamp.dk	Punktum dk A/S (direct)
studentcenter.dk	Simply.com A/S
studentpulse.dk	Simply.com A/S
studiepraktiknordjylland.dk	Simply.com A/S
svendborggym-aabenthus.dk	Simply.com A/S
uddannelsesaftenikast2021.dk	Simply.com A/S
uddannelsesofficeren.dk	Simply.com A/S
ungesvalgafungdomsuddannelser.dk	Simply.com A/S
ungevejledningeniherning.dk	Simply.com A/S
uunordvestjylland-virtuelintro.dk	Simply.com A/S
xywmedia.dk	Punktum dk A/S (direct)
youngcrm.dk	Simply.com A/S
younggunholding.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

49ms

48ms

32ms

AAAA

48ms

TXT

124ms

CAA

55ms

HTTPS

41ms

TLSA

365ms

SOA

14ms

MTA-STS

52ms

DNSSEC

57ms

SRV

66ms

Total

785ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 19:18:03	1079ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-04 06:03:06 shown	785ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-01 10:29:21	859ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-26 09:54:58	735ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-17 15:32:45	1150ms	4 NS 1 A 1 MX	🔒 Secure