21-5.dk

📜 Historical scan 2026-08-01 06:10:40 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

21-5.dk is a .dk domain served by 2 nameservers (rex.ns.cloudflare.com, wanda.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.26.6.14 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by 215-dk0e.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 30ms

Nameserver	IP addresses	PTR	ASN / ISP
rex.ns.cloudflare.com	108.162.195.13 162.159.44.13 172.64.35.13 2606:4700:58::a29f:2c0d 2803:f800:50::6ca2:c30d 2a06:98c1:50::ac40:230d	rex.ns.cloudflare.com rex.ns.cloudflare.com rex.ns.cloudflare.com rex.ns.cloudflare.com rex.ns.cloudflare.com rex.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
wanda.ns.cloudflare.com	108.162.192.240 172.64.32.240 173.245.58.240 2606:4700:50::adf5:3af0 2803:f800:50::6ca2:c0f0 2a06:98c1:50::ac40:20f0	wanda.ns.cloudflare.com wanda.ns.cloudflare.com wanda.ns.cloudflare.com wanda.ns.cloudflare.com wanda.ns.cloudflare.com wanda.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

3 records 31ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.26.6.14	300s	—	AS13335	Cloudflare, Inc.	104.26.0.0/20	—	—
104.26.7.14	300s	—	AS13335	Cloudflare, Inc.	104.26.0.0/20	—	—
172.67.68.152	300s	—	AS13335	Cloudflare, Inc.	172.67.64.0/18	—	—

📧 MX Records#

1 records 47ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	215-dk0e.mail.protection.outlook.com	2a01:111:f403:ca04::9 2a01:111:f403:ca04::d 2a01:111:f403:ca04::f 2a01:111:f403:ca09::5 52.101.68.27 52.101.73.15 52.101.73.153 52.101.73.19	mail-db7pr03cu00601.inbound.protection.outlook.com mail-db6pr03cu00105.inbound.protection.outlook.com mail-db7pr03cu00507.inbound.protection.outlook.com mail-am1pr04cu00105.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-as8pr05cu00401.inbound.protection.outlook.com mail-as8pr04cu00803.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 → 40.104.116.40

🔷 AAAA Records (IPv6)#

3 records 46ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:20::681a:60e	300s	—	AS13335	Cloudflare, Inc.	2606:4700:0:0:0:0:0:0/41	—	—
2606:4700:20::681a:70e	300s	—	AS13335	Cloudflare, Inc.	2606:4700:0:0:0:0:0:0/41	—	—
2606:4700:20::ac43:4498	300s	—	AS13335	Cloudflare, Inc.	2606:4700:0:0:0:0:0:0/41	—	—

🔐 HTTPS Records#

1 records 31ms

Priority	Target	SvcParams
1 service	.	alpn="h2" ipv4hint=104.26.6.14,104.26.7.14,172.67.68.152 ipv6hint=2606:4700:20::681a:60e,2606:4700:20::681a:70e,2606:4700:20::ac43:4498

🔌 SRV Records#

1 records 81ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records#

10 records 250ms

TXT Record
anthropic-domain-verification-pajkp2=TJzlf9fhojWDGpv7C0AiXoA3M
apple-domain-verification=kPSycGhYWcxYzSbb
atlassian-domain-verification=4oaasotvP7WJzXXBebi53TjrQaQx3sX1tIt8bb3Nc6Ho6aA7XROOH0A7b5uAQdKS
facebook-domain-verification=6vvmfxmue8t2y82bsu9pap3avboc5p
google-site-verification=7yxXcZsPCyFPqE5p6GztrT47fqjwiwebiUGfqt5yO4w
google-site-verification=b5KwsyX0Mw4i6dibC6HiA3rY2shTb200Qs_hlZvEX4s
google-site-verification=ujsOMP2PBnfznNloQl_V9eMajFTj8XKPFbregK2-_yM
openai-domain-verification=dv-QQoQocn9jmNMm3oHvLm4Vra8
pinterest-site-verification=c539d6cf2875faf61466b724931c31e8
v=spf1 include:spf.protection.outlook.com include:_spf.easycruit.com include:spf.rpost.net include:mail.zendesk.com -all

✉️ SPF#

Policy	Record (21-5.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:_spf.easycruit.com include:spf.rpost.net include:mail.zendesk.com -all

📨 DMARC#

Policy	Record (_dmarc.21-5.dk)
p=reject	v=DMARC1; p=reject; aspf=s; rua=mailto:c1ac8455367f4b6fa8cd8795a652d51c@dmarc-reports.cloudflare.net,mailto:dmarc_agg@vali.email;

📬 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 2026-10-11 23:48:08

www	104.26.6.14 104.26.7.14 172.67.68.152 2606:4700:20::681a:60e 2606:4700:20::681a:70e 2606:4700:20::ac43:4498 (AS13335) (address records, no CNAME)
www vs bare domain	Same network 21-5.dk: 104.26.6.14 104.26.7.14 172.67.68.152 2606:4700:20::681a:60e (AS13335) www.21-5.dk: 104.26.6.14 104.26.7.14 172.67.68.152 2606:4700:20::681a:60e (AS13335)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-215-dk0e._domainkey.215crm.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-215-dk0e._domainkey.215crm.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: 4/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.21-5.dk	47GAXqLVyaSMBD3Es0PEktogOTvW8La15pVO6hPzJIE
TXT	_acme-challenge.21-5.dk	CNYrYWsKdLq7-BaSPAnEQtqjEtTmaB3-TaLpL6SvdUU
TXT	_acme-challenge.21-5.dk	Ve3D8kE98gEFiS-xJsBJx-gbBQpZ16DB827C2WTKppk
TXT	_acme-challenge.21-5.dk	YZeVsSF8zNimk1F6gaX9lAX3sClNA_zYQIc5HjRddiM

🔗 TLSA / DANE#

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

🔐 DNSSEC#

50ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2410993287
Primary NS (MNAME)	rex.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#

30ms

31ms

47ms

AAAA

46ms

TXT

250ms

CAA

31ms

HTTPS

31ms

TLSA

183ms

SOA

0ms

MTA-STS

61ms

DNSSEC

50ms

SRV

81ms

Total

1514ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 07:36:58	1581ms	2 NS 3 A 1 MX	🔒 Secure
2026-09-29 07:32:11	1518ms	2 NS 3 A 1 MX	🔒 Secure
2026-09-25 06:04:49	2150ms	2 NS 3 A 1 MX	🔒 Secure
2026-09-24 05:42:35	1658ms	2 NS 3 A 1 MX	🔒 Secure
2026-09-20 19:07:57	1919ms	2 NS 3 A 1 MX	🔒 Secure
2026-09-13 17:57:26	3966ms	2 NS 3 A 1 MX	🔒 Secure
2026-09-07 10:03:07	10433ms	2 NS 3 A 1 MX	🔒 Secure
2026-08-28 03:53:34	1477ms	2 NS 3 A 1 MX	🔒 Secure
2026-08-25 12:57:36	1694ms	2 NS 3 A 1 MX	🔒 Secure
2026-08-11 13:42:04	3311ms	2 NS 3 A 1 MX	🔒 Secure
2026-08-07 19:31:58	1700ms	2 NS 3 A 1 MX	🔒 Secure
2026-08-01 06:10:40 shown	1514ms	2 NS 3 A 1 MX	🔒 Secure
2026-07-24 00:41:55	2446ms	2 NS 3 A 1 MX	🔒 Secure
2026-07-19 12:24:13	9536ms	2 NS 3 A 1 MX	🔒 Secure
2026-07-18 11:07:22	2749ms	2 NS 3 A 1 MX	🔒 Secure
2026-06-26 13:50:55	1652ms	2 NS 3 A 1 MX	🔒 Secure
2026-06-24 22:31:54	2015ms	2 NS 3 A 1 MX	🔒 Secure
2026-06-22 10:33:41	1114ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-21 19:07:27	2692ms	2 NS 3 A 1 MX	🔒 Secure
2026-06-21 10:44:42	1152ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-19 19:01:44	914ms	2 NS 3 A 1 MX	🔒 Secure
2026-06-18 09:18:14	1860ms	2 NS 3 A 1 MX	🔒 Secure
2026-06-16 12:45:39	1349ms	2 NS 3 A 1 MX	🔒 Secure