rtb.dk

📜 Historical scan 2026-09-08 03:41:37 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rtb.dk is a .dk domain served by 2 nameservers (ns1.dlx.dk, ns2.dlx.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 5 more. The zone is DNSSEC-signed and validates, has no 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 103ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.dlx.dk	2a00:1b18:1337:1337::53 46.30.121.210	ns1.dlx.dk ns1.dlx.dk	AS47527 DLX A/S AS47527 DLX A/S
ns2.dlx.dk	185.208.212.124 2a00:1b19:1337:1337::53	ns2.dlx.dk ns2.dlx.dk	AS47527 DLX A/S AS47527 DLX A/S

🌍 A Records#

🌍

No A records found

📧 MX Records#

7 records 102ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	aspmx.l.google.com	142.250.147.26 2a00:1450:4025:c01::1b	rd-in-f26.1e100.net rd-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt1.aspmx.l.google.com	192.178.211.26 2404:6800:4000:1025::1b	lcbomp-in-f26.1e100.net lcbomp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt2.aspmx.l.google.com	192.178.158.26 2404:6800:4013:813::1b	lcdels-in-f26.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	aspmx2.googlemail.com	192.178.211.26 2404:6800:4000:1025::1b	lcbomp-in-f26.1e100.net lcbomp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	aspmx3.googlemail.com	192.178.158.27 2404:6800:4013:813::1b	lcdels-in-f27.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	aspmx4.googlemail.com	173.194.41.27 173.194.41.27 2404:6800:4001:c01::1b	mad01s14-in-f27.1e100.net yukulwh-in-f27.1e100.net yukulwh-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	3600s	aspmx5.googlemail.com	172.253.158.26 2404:6800:4003:c26::1b	so-in-f26.1e100.net so-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 304ms

TXT Record
v=spf1 include:_spf.google.com -all

✉️ SPF#

Policy	Record (rtb.dk)
-all (hard fail)	v=spf1 include:_spf.google.com -all

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 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 2026-10-14 03:53:32

www	NXDOMAIN
www vs bare domain	Neither resolves rtb.dk: no address www.rtb.dk: no address
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
google	—	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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

208ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

0ms

Field	Value
Serial	2022020728
Primary NS (MNAME)	ns1.dlx.dk
Responsible (RNAME)	ks@dlx.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

103ms

155ms

102ms

AAAA

127ms

TXT

304ms

CAA

134ms

HTTPS

128ms

TLSA

110ms

SOA

0ms

MTA-STS

111ms

DNSSEC

208ms

SRV

148ms

Total

1770ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 17:48:25	929ms	2 NS 0 A 7 MX	🔒 Secure
2026-09-29 17:39:36	797ms	2 NS 0 A 7 MX	🔒 Secure
2026-09-13 22:30:00	2109ms	2 NS 0 A 7 MX	🔒 Secure
2026-09-08 03:41:37 shown	1770ms	2 NS 0 A 7 MX	🔒 Secure
2026-08-26 21:45:33	845ms	2 NS 0 A 7 MX	🔒 Secure
2026-08-26 02:35:32	947ms	2 NS 0 A 7 MX	🔒 Secure
2026-08-17 11:40:40	5980ms	2 NS 0 A 7 MX	🔒 Secure
2026-08-16 11:00:57	7475ms	2 NS 0 A 7 MX	🔒 Secure
2026-07-25 18:07:56	1430ms	2 NS 0 A 7 MX	🔒 Secure
2026-07-24 17:55:16	1505ms	2 NS 0 A 7 MX	🔒 Secure
2026-07-03 16:12:10	695ms	2 NS 0 A 7 MX	🔒 Secure
2026-07-01 13:03:15	709ms	2 NS 0 A 7 MX	🔒 Secure
2026-06-20 15:20:25	1437ms	2 NS 0 A 7 MX	🔒 Secure
2026-06-18 01:02:57	759ms	2 NS 0 A 7 MX	🔒 Secure