sesg.dk

📜 Historical scan 2026-08-26 11:47:58 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

sesg.dk is a .dk domain served by 3 nameservers (ns.efif.dk, ns2.efif.dk, ns3.efif.dk). It was registered on 7 December 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.43.14 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by sesg-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#

3 records 54ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.efif.dk	195.254.168.23	ns.efif.dk	AS51073 Aarhus Business College
ns2.efif.dk	195.254.168.12	ns2.efif.dk	AS51073 Aarhus Business College
ns3.efif.dk	20.23.170.35	—	AS8075 Microsoft Corporation

🌍 A Records#

1 records 44ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.43.14	300s	linux14.scannet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

1 records 54ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	sesg-dk.mail.protection.outlook.com	2a01:111:f403:ca04::10 2a01:111:f403:ca04::7 2a01:111:f403:ca09::28 2a01:111:f403:ca09::e 52.101.68.16 52.101.68.21 52.101.73.11 52.101.73.16	mail-dbapr03cu00100.inbound.protection.outlook.com mail-db4pr02cu00307.inbound.protection.outlook.com mail-am6pr02cu00300.inbound.protection.outlook.com mail-am7pr05cu00206.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-db4pr02cu00205.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-as2pr05cu00100.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

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 405ms

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

📝 TXT Records#

4 records 245ms

TXT Record
autodesk-domain-verification=dkp1dE0b13L429FCyjv7\010
KVpdE4LUaHFTYkbzAWWNnyOaoUHW7O3/E/21AoU5c0Lj6v9atvqhcJTklzIOEw41WUT0Cs1vrk45watUI/1c4g==
MS=ms20881320
v=spf1 include:spf.protection.outlook.com include:_spf2.efif.dk include:spfinclude.signflow.dk include:spf.scannet.dk Ip4:217.195.176.72 ip4:91.215.162.220 -all

✉️ SPF#

Policy	Record (sesg.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:_spf2.efif.dk include:spfinclude.signflow.dk include:spf.scannet.dk Ip4:217.195.176.72 ip4:91.215.162.220 -all

📨 DMARC#

Policy	Record (_dmarc.sesg.dk)
p=reject	v=DMARC1; p=reject; pct=100; ruf=mailto:analyze@sesg.dk; rua=mailto:64e88d13a948b@dmarc.centerasecurity.com

📬 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 2026-10-17 22:43:03

www CNAME	sesg.dk (all on sesg.dk) → 185.21.43.14 (AS48854)
www vs bare domain	Same network sesg.dk: 185.21.43.14 (AS48854) www.sesg.dk: 185.21.43.14 (AS48854)
Wildcard	No
Denial of existence	NSEC3 · 50 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector2	selector2-sesg-dk._domainkey.efif.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: 6/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

91ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2016011582
Primary NS (MNAME)	ns.efif.dk
Responsible (RNAME)	dns-zc@efif.dk
Refresh	14400s
Retry	3600s
Expire	2419200s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-13 17:08:32

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2016-12-07
Expires	2026-12-31 (72d)

🔗 Same registrant#

1 domain

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
svend-es.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

54ms

44ms

54ms

AAAA

54ms

TXT

245ms

CAA

42ms

HTTPS

51ms

TLSA

309ms

SOA

0ms

MTA-STS

67ms

DNSSEC

91ms

SRV

405ms

Total

1248ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-17 22:43:03	1896ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-16 22:10:04	4625ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-14 16:44:17	2016ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-13 16:29:31	1049ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-10 08:24:41	972ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-08 11:21:58	4243ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-07 11:03:42	1270ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-06 10:07:29	3250ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-05 08:15:08	3514ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-03 08:11:14	1667ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-01 08:04:11	4813ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-30 07:58:11	842ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-29 18:14:42	1358ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-27 17:53:16	2592ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-26 17:34:52	928ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-23 22:30:13	17519ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-21 10:11:18	18539ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-16 02:17:54	1640ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-09 00:12:22	1270ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-06 17:12:25	1137ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-30 15:26:52	2806ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-28 13:34:30	1938ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-27 12:50:18	808ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-26 11:47:58 shown	1248ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-26 09:30:50	9039ms	3 NS 1 A 1 MX	🔒 Secure