theblueoffice.dk

📜 Historical scan 2026-07-16 20:50:37 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

theblueoffice.dk is a .dk domain served by 2 nameservers (ricardo.ns.cloudflare.com, ruth.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.92.192 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. The zone is of unknown DNSSEC status, 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 42ms

Nameserver	IP addresses	PTR	ASN / ISP
ricardo.ns.cloudflare.com	108.162.195.211 162.159.44.211 172.64.35.211 2606:4700:58::a29f:2cd3 2803:f800:50::6ca2:c3d3 2a06:98c1:50::ac40:23d3	ricardo.ns.cloudflare.com ricardo.ns.cloudflare.com ricardo.ns.cloudflare.com ricardo.ns.cloudflare.com ricardo.ns.cloudflare.com ricardo.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
ruth.ns.cloudflare.com	108.162.192.143 172.64.32.143 173.245.58.143 2606:4700:50::adf5:3a8f 2803:f800:50::6ca2:c08f 2a06:98c1:50::ac40:208f	ruth.ns.cloudflare.com ruth.ns.cloudflare.com ruth.ns.cloudflare.com ruth.ns.cloudflare.com ruth.ns.cloudflare.com ruth.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 43ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.92.192	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.197.88	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

5 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	aspmx.l.google.com	142.250.147.27 2a00:1450:4025:c01::1a	rd-in-f27.1e100.net rd-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt1.aspmx.l.google.com	192.178.158.26 2404:6800:4013:813::1a	lcdels-in-f26.1e100.net lcdels-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt2.aspmx.l.google.com	172.253.158.27 2404:6800:4003:c26::1a	so-in-f27.1e100.net so-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	alt3.aspmx.l.google.com	172.253.158.27 2404:6800:4003:c26::1b	so-in-f27.1e100.net so-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	alt4.aspmx.l.google.com	192.178.230.27 2404:6800:400b:c01b::1a	yunrtab-in-f27.1e100.net yunrtab-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC

🔷 AAAA Records (IPv6)#

2 records 47ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3032::ac43:c558	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::6815:5cc0	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 41ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.92.192,172.67.197.88 ech=AEX+DQBBdAAgACCUuj1yGub7GeSEPQEQOCllY/jPRlrR/osIa54Q8TNDKgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::ac43:c558,2606:4700:3037::6815:5cc0

📝 TXT Records#

7 records 201ms

TXT Record
brevo-code:4110d4c3b8a1f42b3059b94b9d93043b
firebase=virtual-office-322da
google-site-verification=s4uoedzr2g9FVhixIsUOtx3ehBtZiRLarHu3BU_2Piw
sendinblue-site-verification=4997353
v=spf1 include:_spf.firebasemail.com ~all
v=spf1 include:_spf.google.com -all
v=spf1 include:mailgun.org ~all

✉️ SPF#

⚠ Multiple SPF records — RFC 7208 §4.5 violation (receivers must treat this as permerror)

Policy	Record (theblueoffice.dk)
~all (soft fail)	v=spf1 include:_spf.firebasemail.com ~all
-all (hard fail)	v=spf1 include:_spf.google.com -all
~all (soft fail)	v=spf1 include:mailgun.org ~all

📨 DMARC#

Policy	Record (_dmarc.theblueoffice.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.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 00:12:22

www	104.21.92.192 172.67.197.88 2606:4700:3032::ac43:c558 2606:4700:3037::6815:5cc0 (AS13335) (address records, no CNAME)
www vs bare domain	Same network theblueoffice.dk: 104.21.92.192 172.67.197.88 2606:4700:3032::ac43:c558 2606:4700:3037::6815:5cc0 (AS13335) www.theblueoffice.dk: 104.21.92.192 172.67.197.88 2606:4700:3032::ac43:c558 2606:4700:3037::6815:5cc0 (AS13335)
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
mail	—	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: 4/10 · policy: ~all

error 3 SPF records: receivers must treat that as a permanent error (RFC 7208 §4.5)

🔗 TLSA / DANE#

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

🔐 DNSSEC#

110ms

Check	Result
Validation Status	❓ Unknown
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	broken trust chain resolving 'theblueoffice.dk/A/IN': 127.0.0.1#53

🏷️ SOA#

0ms

Field	Value
Serial	2409682477
Primary NS (MNAME)	ricardo.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

42ms

43ms

39ms

AAAA

47ms

TXT

201ms

CAA

43ms

HTTPS

41ms

TLSA

159ms

SOA

0ms

MTA-STS

127ms

DNSSEC

110ms

SRV

116ms

Total

1275ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-08 00:12:22	600ms	2 NS 2 A 5 MX	🔓 Insecure
2026-10-01 01:07:49	638ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-16 22:34:04	2424ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-15 07:19:00	2269ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-08 04:45:38	2294ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-25 11:25:36	823ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-16 20:50:37 shown	1275ms	2 NS 2 A 5 MX	❓ Unknown
2026-07-07 19:42:37	1697ms	2 NS 2 A 5 MX	🔓 Insecure
2026-06-29 23:13:45	995ms	2 NS 2 A 5 MX	🔓 Insecure
2026-06-21 17:50:37	1488ms	2 NS 2 A 5 MX	🔓 Insecure
2026-06-20 19:30:16	1099ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-18 04:47:00	3248ms	2 NS 2 A 5 MX	🔓 Insecure