esbu.dk

📜 Historical scan 2026-09-24 07:24:26  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

esbu.dk is a .dk domain served by 2 nameservers (brit.ns.cloudflare.com, mack.ns.cloudflare.com). It was registered on 26 November 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.55 is hosted by team.blue Denmark A/S (AS48854) in Denmark. 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#

2 records   58ms
NameserverIP addressesPTRASN / ISP
brit.ns.cloudflare.com 108.162.192.78
172.64.32.78
173.245.58.78
2606:4700:50::adf5:3a4e
2803:f800:50::6ca2:c04e
2a06:98c1:50::ac40:204e		 brit.ns.cloudflare.com
brit.ns.cloudflare.com
brit.ns.cloudflare.com
brit.ns.cloudflare.com
brit.ns.cloudflare.com
brit.ns.cloudflare.com		 AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
mack.ns.cloudflare.com 108.162.195.37
162.159.44.37
172.64.35.37
2606:4700:58::a29f:2c25
2803:f800:50::6ca2:c325
2a06:98c1:50::ac40:2325		 mack.ns.cloudflare.com
mack.ns.cloudflare.com
mack.ns.cloudflare.com
mack.ns.cloudflare.com
mack.ns.cloudflare.com
mack.ns.cloudflare.com		 AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.

🌍 A Records#

1 records   35ms
IPTTLPTRASNISP / OrgCIDRCountryCity
185.21.40.55 300s vm1251.enterprisecloud.nu AS48854 team.blue Denmark A/S 185.21.40.0/22 🇩🇰 Denmark —

📧 MX Records#

📧
No MX records found

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records   180ms
TXT Record
v=spf1 -all

✉️ SPF#

PolicyRecord (esbu.dk)
-all (hard fail) v=spf1 -all

📨 DMARC#

PolicyRecord (_dmarc.esbu.dk)
p=reject v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s;

📬 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 2026-10-15 04:43:27
www CNAMEesbu.dk (all on esbu.dk)
www vs bare domainSame network
esbu.dk: 185.21.40.55 (AS48854)
www.esbu.dk: 185.21.40.55 (AS48854)
WildcardNo
Denial of existenceCompact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEYPublished: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔏 ACME Challenge#

TypeNameValue
TXT _acme-challenge.esbu.dk -WOELjC9wtBCQWkqPvC7KkD_W6hOPx4zwR8vGrf_mOc
TXT _acme-challenge.esbu.dk -aMrC3m4MtW6TkQvY_J6jAZGkzRz_lKvZz3xsrUSpV0
TXT _acme-challenge.esbu.dk D24_GfeaifTs5g5jStXwuwQMPQFqnAd8R4mBXAsCVUQ
TXT _acme-challenge.esbu.dk LNOx9jxeVltDZ4aGuIINIZ7d5cDkcawn7dQNJ55wd2M

🔗 TLSA / DANE#

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

🔐 DNSSEC#

104ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

0ms
FieldValue
Serial2415595689
Primary NS (MNAME)brit.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

WHOIS fetched 2026-10-13 12:35:04
FieldValue
RegistrarDANDOMAIN A/S
Registered2001-11-26
Expires2026-12-31 (75d)

🔗 Same registrant#

47 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).

DomainRegistrar
aadal-skolen.dkDANDOMAIN A/S
blokbeats.dkCURANET A/S
boldesagerskole.dkDANDOMAIN A/S
borderpath.dkDANDOMAIN A/S
brugesbjergkommune.dkDANDOMAIN A/S
bryndumskole.dkDANDOMAIN A/S
danmarksgadesskole.dkDANDOMAIN A/S
darkskymandø.dkDANDOMAIN A/S
darkskyparkmandoe.dkDANDOMAIN A/S
darumbørneby.dkDANDOMAIN A/S
detåbnelydteater.dkDANDOMAIN A/S
esbjerg-lufthavn.dkDANDOMAIN A/S
esbjerg-udeliv.dkDANDOMAIN A/S
esbjerg.dkDANDOMAIN A/S
esbjergairport.dkDANDOMAIN A/S
esbjergbyfond.dkDANDOMAIN A/S
esbjergbyhistoriskearkiv.dkDANDOMAIN A/S
esbjergdroneport.dkDANDOMAIN A/S
esbjergerklæringen.dkDANDOMAIN A/S
esbjergkommune.dkDANDOMAIN A/S
esbjerglufthavn.dkDANDOMAIN A/S
esbjergskoler.dkDANDOMAIN A/S
esbjergtest.dkDANDOMAIN A/S
esefestival.dkDANDOMAIN A/S
experienceesbjerg.dkDANDOMAIN A/S
fantasyfestival.dkDANDOMAIN A/S
fourfeldtskolen.dkDANDOMAIN A/S
graensesti.dkDANDOMAIN A/S
gredstedbroskole.dkDANDOMAIN A/S
grenzpfad.dkDANDOMAIN A/S
grænsesti-skole.dkDANDOMAIN A/S
hjertingskole.dkDANDOMAIN A/S
huset-esbjerg.dkDANDOMAIN A/S
kvaglundskolen.dkDANDOMAIN A/S
nordreskole.dkDANDOMAIN A/S
preprodesbjergkommune.dkDANDOMAIN A/S
ribe.dkDANDOMAIN A/S
rørkjærskole.dkDANDOMAIN A/S
skadsskole.dkDANDOMAIN A/S
sydvestjyskbrandvæsen.dkDANDOMAIN A/S
sønderrisskolen.dkDANDOMAIN A/S
tjaereborgskole.dkDANDOMAIN A/S
udbudspanelet.dkDANDOMAIN A/S
vejrupboerneby.dkDANDOMAIN A/S
vejrupskole.dkDANDOMAIN A/S
vitaskolen.dkDANDOMAIN A/S
vittenbergskolen.dkDANDOMAIN A/S
📋 WHOIS#

⏱️ Lookup Timing#

NS
58ms
A
35ms
MX
37ms
AAAA
35ms
TXT
180ms
CAA
35ms
HTTPS
29ms
TLSA
49ms
SOA
0ms
MTA-STS
59ms
DNSSEC
104ms
SRV
66ms
Total
533ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-15 04:43:27 1451ms 2 NS 1 A 0 MX 🔒 Secure
2026-09-26 06:02:21 524ms 2 NS 1 A 0 MX 🔒 Secure
2026-09-25 07:27:45 518ms 2 NS 1 A 0 MX 🔒 Secure
2026-09-24 07:24:26 shown 533ms 2 NS 1 A 0 MX 🔒 Secure
2026-09-22 10:18:12 911ms 2 NS 1 A 0 MX 🔒 Secure
2026-08-28 15:51:00 2553ms 2 NS 1 A 0 MX 🔒 Secure
2026-08-14 02:49:50 3573ms 2 NS 1 A 0 MX 🔒 Secure
2026-08-06 21:04:38 930ms 2 NS 1 A 0 MX 🔒 Secure
2026-07-26 09:05:03 8943ms 2 NS 1 A 0 MX 🔒 Secure
2026-07-24 08:08:43 839ms 2 NS 1 A 0 MX 🔒 Secure
2026-07-10 15:38:07 1027ms 2 NS 1 A 0 MX 🔒 Secure
2026-06-23 04:31:00 830ms 2 NS 1 A 0 MX 🔒 Secure
2026-06-20 04:15:19 436ms 2 NS 1 A 0 MX 🔒 Secure
2026-06-17 08:20:16 366ms 2 NS 1 A 0 MX 🔒 Secure
2026-06-17 08:20:11 430ms 2 NS 1 A 0 MX 🔒 Secure
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