build.dk

📜 Historical scan 2026-09-05 18:07:07 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

build.dk is a .dk domain served by 2 nameservers (aragorn.ns.cloudflare.com, julissa.ns.cloudflare.com). It was registered on 6 July 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.49.99 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mailserver.purelymail.com. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 48ms

Nameserver	IP addresses	PTR	ASN / ISP
aragorn.ns.cloudflare.com	108.162.193.67 172.64.33.67 173.245.59.67 2606:4700:58::adf5:3b43 2803:f800:50::6ca2:c143 2a06:98c1:50::ac40:2143	aragorn.ns.cloudflare.com aragorn.ns.cloudflare.com aragorn.ns.cloudflare.com aragorn.ns.cloudflare.com aragorn.ns.cloudflare.com aragorn.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
julissa.ns.cloudflare.com	108.162.194.105 162.159.38.105 172.64.34.105 2606:4700:50::a29f:2669 2803:f800:50::6ca2:c269 2a06:98c1:50::ac40:2269	julissa.ns.cloudflare.com julissa.ns.cloudflare.com julissa.ns.cloudflare.com julissa.ns.cloudflare.com julissa.ns.cloudflare.com julissa.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 53ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.49.99	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.161.156	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 56ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
50	300s	mailserver.purelymail.com	18.204.123.63	ec2-18-204-123-63.compute-1.amazonaws.com	AS14618 Amazon.com, Inc.

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	104.21.49.99
🔶 Autoconfig	104.21.49.99

🔷 AAAA Records (IPv6)#

2 records 43ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:3163	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3033::ac43:a19c	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 61ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.49.99,172.67.161.156 ech=AEX+DQBB8AAgACB7VaaZ0DbgmyAl14Tk7XhjqpwE7yMZirsvI9/s2xgCbQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:3163,2606:4700:3033::ac43:a19c

📝 TXT Records#

4 records 216ms

TXT Record
kupm6jj4rvgrmoftdqigpbv7ce
purelymail_ownership_proof=2c403dd8428be823a864ece9734a81672983afb9747b50220655ffc88220888d9b306e128c318f9fcd9a073557672eb54079d58c3f81cd9abdd5a3fb5242f475
v=DMARC1; p=none;
v=spf1 include:_spf.purelymail.com ~all

✉️ SPF#

Policy	Record (build.dk)
~all (soft fail)	v=spf1 include:_spf.purelymail.com ~all

📨 DMARC#

Policy	Record (_dmarc.build.dk)
p=reject	v=DMARC1; p=reject; ruf=mailto:dmarc@purelymail.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 2026-10-08 07:39:13

www	104.21.49.99 172.67.161.156 2606:4700:3031::6815:3163 2606:4700:3033::ac43:a19c (AS13335) (address records, no CNAME)
www vs bare domain	Same network build.dk: 104.21.49.99 172.67.161.156 2606:4700:3031::6815:3163 2606:4700:3033::ac43:a19c (AS13335) www.build.dk: 104.21.49.99 172.67.161.156 2606:4700:3031::6815:3163 2606:4700:3033::ac43:a19c (AS13335)
Wildcard	Yes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.build.dk	IV0RyW60RUVK2ul-xIuBLqa6NwveQi3Gp0UaGvRc3jA
TXT	_acme-challenge.build.dk	Ou9vhKTmb4-QLjZeCwogGvNqlcW4PAG8-mkCzGxSUyc

🔗 TLSA / DANE#

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

🔐 DNSSEC#

119ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

0ms

Field	Value
Serial	2413953631
Primary NS (MNAME)	aragorn.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-17 03:24:36

Field	Value
Registrar	ONE.COM A/S
Registered	2019-07-06
Expires	2027-04-30 (194d)

🔗 Same registrant#

102 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
3dgi.dk	Punktum dk A/S (direct)
aalborg-universitetsbibliotek.dk	Punktum dk A/S (direct)
aalborg-university.dk	Punktum dk A/S (direct)
aalborgbusinessschool.dk	Punktum dk A/S (direct)
aalborguniversitet.dk	Punktum dk A/S (direct)
aalborguniversitetsbibliotek.dk	Punktum dk A/S (direct)
aau-build.dk	Punktum dk A/S (direct)
aau-kbh.dk	Punktum dk A/S (direct)
aau.dk	Punktum dk A/S (direct)
aaubuild.dk	Punktum dk A/S (direct)
aaucph.dk	Punktum dk A/S (direct)
aauentrepreneurs.dk	Punktum dk A/S (direct)
aauk.dk	Punktum dk A/S (direct)
aauni.dk	Punktum dk A/S (direct)
aausat5.dk	Punktum dk A/S (direct)
aausat6.dk	Punktum dk A/S (direct)
aausat7.dk	Punktum dk A/S (direct)
aausat8.dk	Punktum dk A/S (direct)
aausatii.dk	Punktum dk A/S (direct)
aautest.dk	Punktum dk A/S (direct)
active-mind.dk	Punktum dk A/S (direct)
ad-studies.dk	Punktum dk A/S (direct)
adapt-t2d.dk	Punktum dk A/S (direct)
aeromobility.dk	Punktum dk A/S (direct)
ai-mat.dk	Punktum dk A/S (direct)
aktionsforskning.dk	Punktum dk A/S (direct)
alternativisolering.dk	Punktum dk A/S (direct)
architecturaldesigner.dk	Punktum dk A/S (direct)
baeredygtigesynergier.dk	Punktum dk A/S (direct)
beregningsprogrammet.dk	Punktum dk A/S (direct)
betterhearing.dk	Punktum dk A/S (direct)
blivlandinspektor.dk	Punktum dk A/S (direct)
borgerbidrag.dk	Punktum dk A/S (direct)
bpdag.dk	Punktum dk A/S (direct)
branalyse.dk	Punktum dk A/S (direct)
build-kurser.dk	Punktum dk A/S (direct)
buildt.dk	Punktum dk A/S (direct)
built.dk	Punktum dk A/S (direct)
byggeprocesdag.dk	Punktum dk A/S (direct)
byggerioginformatik.dk	Punktum dk A/S (direct)
bygningsfysikdag.dk	Punktum dk A/S (direct)
cebe.dk	Punktum dk A/S (direct)
cedir.dk	Punktum dk A/S (direct)
claaudia.dk	Punktum dk A/S (direct)
co2action.dk	Punktum dk A/S (direct)
copenhageninnovationharbor.dk	Punktum dk A/S (direct)
cykeljakken.dk	Punktum dk A/S (direct)
dachi.dk	Punktum dk A/S (direct)
datasteward.dk	Punktum dk A/S (direct)
datastewards.dk	Punktum dk A/S (direct)
dbur.dk	Punktum dk A/S (direct)
designnews.dk	Punktum dk A/S (direct)
digitalhealthlab.dk	Punktum dk A/S (direct)
ecomacundervisning.dk	Punktum dk A/S (direct)
ecswr2017.dk	Punktum dk A/S (direct)
emotivo.dk	Punktum dk A/S (direct)
energybox.dk	Punktum dk A/S (direct)
energyplanning.dk	Punktum dk A/S (direct)
exo-aider.dk	Punktum dk A/S (direct)
fbktest.dk	Punktum dk A/S (direct)
flytverden.dk	Punktum dk A/S (direct)
forvaltningsretskonferencen.dk	Punktum dk A/S (direct)
gbl21.dk	Punktum dk A/S (direct)
hjerteportalen.dk	Punktum dk A/S (direct)
iccas17.dk	Punktum dk A/S (direct)
ictnorcom.dk	Punktum dk A/S (direct)
indeklimadag.dk	Punktum dk A/S (direct)
innokids.dk	Punktum dk A/S (direct)
innovativtsamfund.dk	Punktum dk A/S (direct)
labwelfaretech.dk	Punktum dk A/S (direct)
lcabuild.dk	Punktum dk A/S (direct)
lcbuild.dk	Punktum dk A/S (direct)
lcby.dk	Punktum dk A/S (direct)
lccbuild.dk	Punktum dk A/S (direct)
lccbyg.dk	Punktum dk A/S (direct)
levetider.dk	Punktum dk A/S (direct)
menneskerettighedskonference.dk	Punktum dk A/S (direct)
miljoemaster.dk	Punktum dk A/S (direct)
mobilitymaster.dk	Punktum dk A/S (direct)
musikterapi.dk	Punktum dk A/S (direct)
mytrack.dk	Punktum dk A/S (direct)
nabolagsatlas.dk	Punktum dk A/S (direct)
nationaløkonomiaau.dk	Punktum dk A/S (direct)
nfc.dk	Punktum dk A/S (direct)
nova-master.dk	Punktum dk A/S (direct)
oeconomiaau.dk	Punktum dk A/S (direct)
oekonomiaau.dk	Punktum dk A/S (direct)
safeconnect.dk	Punktum dk A/S (direct)
sbi-anvisninger.dk	Punktum dk A/S (direct)
sbi-kurser.dk	Punktum dk A/S (direct)
skatteretskonference.dk	Punktum dk A/S (direct)
skimmel.dk	Punktum dk A/S (direct)
teledialog.dk	Punktum dk A/S (direct)
telerehabilitering.dk	Punktum dk A/S (direct)
tjekskoleforbrug.dk	Punktum dk A/S (direct)
ud-dag.dk	Punktum dk A/S (direct)
uddannelsesterm.dk	Punktum dk A/S (direct)
uni-aalborg.dk	Punktum dk A/S (direct)
urbandesigner.dk	Punktum dk A/S (direct)
videnskabsmoede.dk	Punktum dk A/S (direct)

Showing 100 of 102.

📋 WHOIS#

⏱️ Lookup Timing#

48ms

53ms

56ms

AAAA

43ms

TXT

216ms

CAA

50ms

HTTPS

61ms

TLSA

144ms

SOA

0ms

MTA-STS

94ms

DNSSEC

119ms

SRV

106ms

Total

721ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-08 07:39:13	937ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-25 07:30:32	2540ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-09 05:33:28	10061ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-05 18:07:07 shown	721ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-01 13:41:20	889ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-28 00:44:06	9727ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-20 23:04:10	6087ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-10 21:47:45	2790ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-22 07:27:44	1139ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-16 17:43:35	537ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-16 17:40:10	633ms	2 NS 2 A 1 MX	🔓 Insecure