rfbb.dk

📜 Historical scan 2026-06-17 20:41:56 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rfbb.dk is a .dk domain served by 2 nameservers (hugh.ns.cloudflare.com, lauryn.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.19.240.93 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by rfbb-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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 56ms

Nameserver	IP addresses	PTR	ASN / ISP
hugh.ns.cloudflare.com	108.162.193.117 172.64.33.117 173.245.59.117 2606:4700:58::adf5:3b75 2803:f800:50::6ca2:c175 2a06:98c1:50::ac40:2175	hugh.ns.cloudflare.com hugh.ns.cloudflare.com hugh.ns.cloudflare.com hugh.ns.cloudflare.com hugh.ns.cloudflare.com hugh.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
lauryn.ns.cloudflare.com	108.162.194.22 162.159.38.22 172.64.34.22 2606:4700:50::a29f:2616 2803:f800:50::6ca2:c216 2a06:98c1:50::ac40:2216	lauryn.ns.cloudflare.com lauryn.ns.cloudflare.com lauryn.ns.cloudflare.com lauryn.ns.cloudflare.com lauryn.ns.cloudflare.com lauryn.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 39ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.19.240.93	—	—	AS13335	Cloudflare, Inc.	104.16.0.0/14	—	—
104.19.241.93	—	—	AS13335	Cloudflare, Inc.	104.16.0.0/14	—	—

📧 MX Records#

1 records 67ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	rfbb-dk.mail.protection.outlook.com	2a01:111:f403:ca04::10 2a01:111:f403:ca04::a 2a01:111:f403:ca09::c 2a01:111:f403:ca09::f 52.101.73.15 52.101.73.22 52.101.73.24 52.101.73.4	mail-dbapr03cu00100.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com mail-am7pr05cu00307.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-am7pr05cu00106.inbound.protection.outlook.com mail-as8pr05cu00300.inbound.protection.outlook.com mail-am0pr83cu00404.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 → 40.104.116.8

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

5 records 160ms

TXT Record
google-site-verification=3XyiVcz3PSxGXh90snzilrwIaTwbBVlU4ItpBh5S6MQ
google-site-verification=wEwbyV4vKMFB_eNK_ubQ3FY-wJUruRAoirNOJpoWk20
lime-domain-verification=D8ADBD73D7DA200
MS=ms14342904
v=spf1 include:spf.protection.outlook.com include:sendgrid.net -all

✉️ SPF#

Policy	Record (rfbb.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:sendgrid.net -all

📨 DMARC#

Policy	Record (_dmarc.rfbb.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:84cd4ddfaf5543a3bec9a5a696c24560@dmarc-reports.cloudflare.net

📬 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 2026-10-07 17:13:00

www	104.19.240.93 104.19.241.93 (AS13335) (address records, no CNAME)
www vs bare domain	Same network rfbb.dk: 104.19.240.93 104.19.241.93 (AS13335) www.rfbb.dk: 104.19.240.93 104.19.241.93 (AS13335)
Wildcard	No

✍️ DKIM keys#

3 found

Selector	CNAME	Key
s1	s1.domainkey.u25879343.wl094.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u25879343.wl094.sendgrid.net	RSA · ~2048 bit
selector1	selector1-rfbb-dk._domainkey.tdch1019231.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: 3/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

115ms

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

🏷️ SOA#

50ms

Field	Value
Serial	2405961645
Primary NS (MNAME)	hugh.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#

56ms

39ms

67ms

AAAA

31ms

TXT

160ms

CAA

41ms

HTTPS

47ms

TLSA

363ms

SOA

50ms

MTA-STS

44ms

DNSSEC

115ms

SRV

59ms

Total

1061ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 13:17:55	1302ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-23 14:00:59	1082ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-18 22:02:58	1800ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-14 17:46:53	2515ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-08 23:01:36	2567ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-01 07:39:12	1875ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-29 23:21:47	2063ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-27 15:34:14	1127ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-14 14:01:55	1419ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-17 20:41:56 shown	1061ms	2 NS 2 A 1 MX	🔓 Insecure