dbu.dk

📜 Historical scan 2026-06-24 17:17:58 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

dbu.dk is a .dk domain served by 2 nameservers (ns.scannet2.dk, ns2.scannet2.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.19.191.28 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by dbu-dk.mail.protection.outlook.com. The zone is DNSSEC-signed but currently fails validation, 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#

2 records 206ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.scannet2.dk	185.25.141.9 2a02:2339:4006:10d::4171:4171	ns1.scannet.dk ns1.scannet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.scannet2.dk	2a02:2339:1:112:0:5:1:b11 91.197.248.72	ns2.scannet.dk ns2.scannet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 186ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.19.191.28	900s	—	AS13335	Cloudflare, Inc.	104.16.0.0/14	—	—

📧 MX Records#

1 records 179ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	dbu-dk.mail.protection.outlook.com	2a01:111:f403:ca04::5 2a01:111:f403:ca09::8 2a01:111:f403:ca09::9 2a01:111:f403:ca09::e 52.101.68.21 52.101.73.153 52.101.73.2 52.101.73.6	mail-db3pr0202cu00205.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-as8pr04cu00801.inbound.protection.outlook.com mail-am7pr05cu00206.inbound.protection.outlook.com mail-db4pr02cu00205.inbound.protection.outlook.com mail-as8pr05cu00401.inbound.protection.outlook.com mail-as9pr07cu00302.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

📧 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#

2 records 374ms

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

📝 TXT Records#

10 records 602ms

TXT Record
fArRBIVrJmmxWcqztux/cDIrzwFS+GtzySdxp1rpj88=
globalsign-domain-verification=ja_CUaX3MO7nAkA1ctVFTnvzvW-myFzkPvfV_uz137
globalsign-domain-verification=LJ2FGLMeegiMKJDnwHyskecDgp92KsCzZT7xSkQEt5
globalsign-domain-verification=mmVdIlaNYV9nzX0ZuRUog8D9PePNfhyRs0XJIqHxI1
google-site-verification=cEgiwzxxGcNx8iyGfEl-pEPt31JQlA5N-KWOq6vRToE
google-site-verification=tVRWigfCLOFjuwfFWhaoT70uVayo_Dh1TpQRGns26Is
MS=ms69292208
pgBn8eCbMImmUjp0j1MC5Y5hsREdW9iQFCvoDoxRrTNaVBoXBETVWypog1KmTiZscawOBGaUCht7mjGFPtbQ9w==
v=spf1 ip4:168.63.121.165 ip4:185.163.189.41 ip4:185.163.189.46 ip4:12.129.35.25/29 ip4:169.145.39.240/29 ip4:195.191.143.12 ip4:87.54.50.120/29 ip4:10.75.2.8/29 ip4:194.150.113.0/24 ip4:194.150.112.0/24 include:spf.protection.outlook.com include:_spf.concurcompleat.com include:_spf.presscloud.com include:sendgrid.net include:dedicated.mysmtp.com -all
y6AIQu5kM0uV+D2WwRGDH2+jFDbkKY0IIVfU8IG8Ifo=

✉️ SPF#

Policy	Record (dbu.dk)
-all (hard fail)	v=spf1 ip4:168.63.121.165 ip4:185.163.189.41 ip4:185.163.189.46 ip4:12.129.35.25/29 ip4:169.145.39.240/29 ip4:195.191.143.12 ip4:87.54.50.120/29 ip4:10.75.2.8/29 ip4:194.150.113.0/24 ip4:194.150.112.0/24 include:spf.protection.outlook.com include:_spf.concurcompleat.com include:_spf.presscloud.com include:sendgrid.net include:dedicated.mysmtp.com -all

📨 DMARC#

Policy	Record (_dmarc.dbu.dk)
p=quarantine	v=DMARC1; p=quarantine; adkim=r; aspf=r; rua=mailto:6891c48d51a6f@dmarc-dk.centerasecurity.com; ruf=mailto:6891c48d51a6f@dmarc-dk.centerasecurity.com; fo=0; pct=100; ri=86400

📬 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 2026-10-08 13:16:22

www CNAME	dns.umbraco.io (all on umbraco.io) → 162.159.140.127 172.66.0.125 2606:4700:7::7d 2a06:98c1:58::7d (AS13335)
www vs bare domain	Same network dbu.dk: 104.19.191.28 (AS13335) www.dbu.dk: 162.159.140.127 172.66.0.125 2606:4700:7::7d 2a06:98c1:58::7d (AS13335)
Wildcard	No
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

4 found

Selector	CNAME	Key
s1	s1.domainkey.u4691501.wl002.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u4691501.wl002.sendgrid.net	RSA · ~1024 bit below 2048 bit
selector1	selector1-dbu-dk._domainkey.danskboldspilunion.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-dbu-dk._domainkey.danskboldspilunion.onmicrosoft.com	RSA · ~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: 9/10 · policy: -all

warn 9 of the 10 allowed DNS lookups used: one more include can break SPF

🔗 TLSA / DANE#

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

🔐 DNSSEC#

509ms

Check	Result
Validation Status	⚠️ Bogus
AD Flag (resolver validates)	✗ Not set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	broken trust chain resolving 'dbu.dk/DS/IN': 127.0.0.1#53

🏷️ SOA#

326ms

Field	Value
Serial	2026061801
Primary NS (MNAME)	ns.scannet2.dk
Responsible (RNAME)	hostmaster@scannet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

206ms

186ms

179ms

AAAA

212ms

TXT

602ms

CAA

251ms

HTTPS

364ms

TLSA

249ms

SOA

326ms

MTA-STS

309ms

DNSSEC

509ms

SRV

374ms

Total

3244ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-26 10:30:40	734ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-19 23:42:53	1788ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-28 02:08:52	1146ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-26 13:46:21	1505ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-28 01:32:37	1055ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-04 14:08:16	1708ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-24 17:17:58 shown	3244ms	2 NS 1 A 1 MX	⚠️ Bogus
2026-06-23 08:24:42	1151ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-19 02:32:42	840ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 01:16:05	805ms	2 NS 1 A 1 MX	🔒 Secure