b21b.dk

📜 Historical scan 2026-06-27 09:00:01 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

b21b.dk is a .dk domain served by 3 nameservers (ns1.dns.services, ns2.dns.services, ns3.dns.services). It was registered on 28 October 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.102.88.132 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by smtp.google.com. The zone is DNSSEC-signed and validates, 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#

3 records 221ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.dns.services	195.242.131.6 2001:67c:564:ffff::11	ns1.dns.services ns1.dns.services	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
ns2.dns.services	2a00:1b18:2:3:3::2 62.69.152.37	ns2.dns.services 37.34-46.152.69.62.in-addr.arpa	AS47527 DLX A/S AS47527 DLX A/S
ns3.dns.services	185.55.197.53	ns3.dns.services	AS60153 Inpadi ApS

🌍 A Records#

1 records 245ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
91.102.88.132	43200s	—	AS47292	Sentia Denmark A/S	91.102.88.0/21	🇩🇰 Denmark	—

📧 MX Records#

1 records 172ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	600s	smtp.google.com	142.251.127.26 142.251.127.27 2a00:1450:4001:c21::1a 2a00:1450:4001:c21::1b	lcfrai-in-f26.1e100.net lcfrai-in-f27.1e100.net lcfrai-in-f26.1e100.net lcfrai-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC 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#

5 records 326ms

TXT Record
facebook-domain-verification=auftgs305t26bqbbgfzywqobghy3sd
google-site-verification=HUt1nOTlnwQ_2DAKjeX2NRqr2yXJA9S-Sot2oDIiwu0
google-site-verification=nZeZru5doJWgwHEI1vG_3-TQdz5tbMuX-nSZzrpdiLc
google-site-verification=O9P0KgnP6dystrc64vI3rWln_ehl2OCNdf-by4ba80M
v=spf1 include:spf.mandrillapp.com include:_spf.google.com ~all

✉️ SPF#

Policy	Record (b21b.dk)
~all (soft fail)	v=spf1 include:spf.mandrillapp.com include:_spf.google.com ~all

📨 DMARC#

Policy	Record (_dmarc.b21b.dk)
p=reject	v=DMARC1; p=reject; fo=1; pct=100; rua=mailto:re+pkhc5xmldzp@dmarc.postmarkapp.com,mailto:dmarc@b21b.dk,mailto:dmarc_agg@vali.email; ruf=mailto:dmarc@b21b.dk; sp=reject; aspf=r;

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

2 records 219ms

Flags	Tag	Value
0	iodef	mailto:webmaster@b21b.dk
0	issue	letsencrypt.org

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 02:32:58

www	91.102.88.132 (AS47292) (address records, no CNAME)
www vs bare domain	Same network b21b.dk: 91.102.88.132 (AS47292) www.b21b.dk: 91.102.88.132 (AS47292)
Wildcard	No
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
google	—	RSA · ~2048 bit
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: 2/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

318ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

154ms

Field	Value
Serial	2025103079
Primary NS (MNAME)	ns1.dns.services
Responsible (RNAME)	post@dns.services
Refresh	10800s
Retry	3600s
Expire	1814400s
Minimum (neg-cache TTL)	7200s

📋 Registration#

WHOIS fetched 2026-10-10 22:00:56

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2005-10-28
Expires	2027-10-31 (378d)

📋 WHOIS#

⏱️ Lookup Timing#

221ms

245ms

172ms

AAAA

212ms

TXT

326ms

CAA

219ms

HTTPS

170ms

TLSA

438ms

SOA

154ms

MTA-STS

246ms

DNSSEC

318ms

SRV

243ms

Total

1497ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-08-27 17:23:27	1046ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-26 19:54:22	644ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-25 15:04:18	1717ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-24 13:20:35	2444ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-12 23:12:50	1264ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-27 09:00:01 shown	1497ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-23 22:24:14	904ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 01:54:25	1868ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-16 13:57:34	795ms	3 NS 1 A 1 MX	🔒 Secure