rfbb.dk

📜 Historical scan 2026-09-18 22:02:58  ·  ← 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   57ms
NameserverIP addressesPTRASN / 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   60ms
IPTTLPTRASNISP / OrgCIDRCountryCity
104.19.240.93 300s — AS13335 Cloudflare, Inc. 104.16.0.0/14 — —
104.19.241.93 300s — AS13335 Cloudflare, Inc. 104.16.0.0/14 — —

📧 MX Records#

1 records   49ms
PriorityTTLMail ServerIP addressesPTRASN
0 300s rfbb-dk.mail.protection.outlook.com 2a01:111:f403:ca04::6
2a01:111:f403:ca04::e
2a01:111:f403:ca09::24
2a01:111:f403:ca3c::a
52.101.103.140
52.101.209.31
52.101.68.21
52.101.91.156		 mail-db4pr02cu00406.inbound.protection.outlook.com
mail-db8pr02cu00106.inbound.protection.outlook.com
mail-am6pr02cu00204.inbound.protection.outlook.com
mail-zrxpr07cu00102.inbound.protection.outlook.com
mail-miypr02cu00204.inbound.protection.outlook.com
mail-cpjpr05cu00207.inbound.protection.outlook.com
mail-db4pr02cu00205.inbound.protection.outlook.com
mail-maspr04cu00104.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#

ServiceCNAME / IP
🔷 Autodiscoverautodiscover.outlook.com → 40.104.116.40

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

6 records   243ms
TXT Record
brevo-code:1b8076912f22260904cc12607af6ac04
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#

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

📨 DMARC#

PolicyRecord (_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
www104.19.240.93 104.19.241.93 (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardNo

✍️ DKIM keys#

3 found
SelectorCNAMEKey
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

🔏 ACME Challenge#

TypeNameValue
TXT _acme-challenge.rfbb.dk E-puBfZfurqIjX4-vlHLXfgl9KX46zCUP9vFA4gwYco
TXT _acme-challenge.rfbb.dk HWTv8orUKkYp7vm4_gVjMvXyGrjU_kWiMHVfQhkXODA

🔗 TLSA / DANE#

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

🔐 DNSSEC#

79ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

0ms
FieldValue
Serial2414864118
Primary NS (MNAME)hugh.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup
📋 WHOIS#

⏱️ Lookup Timing#

NS
57ms
A
60ms
MX
49ms
AAAA
57ms
TXT
243ms
CAA
19ms
HTTPS
48ms
TLSA
660ms
SOA
0ms
MTA-STS
63ms
DNSSEC
79ms
SRV
106ms
Total
1800ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
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 shown 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 1061ms 2 NS 2 A 1 MX 🔓 Insecure
dhd.dk [/] search Domains, Hosts & DNS — .dk zone