21-5.dk DNS records

🖥️ Nameservers2 records 53ms

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 Records3 records 65ms

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 Records1 records 60ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	215-dk0e.mail.protection.outlook.com	2a01:111:f403:ca04::c 2a01:111:f403:ca09::1 2a01:111:f403:ca09::26 2a01:111:f403:ca09::5 52.101.68.10 52.101.68.12 52.101.68.25 52.101.73.4	mail-db9pr02cu00204.inbound.protection.outlook.com mail-as9pr07cu00301.inbound.protection.outlook.com mail-am8pr83cu00106.inbound.protection.outlook.com mail-am1pr04cu00105.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-db8pr02cu00101.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 → 40.104.116.40

🔷 AAAA Records (IPv6)3 records 95ms

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 Records1 records 104ms

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 Records1 records 108ms

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

📝 TXT Records11 records 244ms

TXT Record
anthropic-domain-verification-pajkp2=TJzlf9fhojWDGpv7C0AiXoA3M
apple-domain-verification=kPSycGhYWcxYzSbb
atlassian-domain-verification=4oaasotvP7WJzXXBebi53TjrQaQx3sX1tIt8bb3Nc6Ho6aA7XROOH0A7b5uAQdKS
facebook-domain-verification=6vvmfxmue8t2y82bsu9pap3avboc5p
google-site-verification=-NrxZ-eyCeGniC-pkLFgDxCa60tnA46ZwG9789ipx6c
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

🔏 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)

🔐 DNSSEC120ms

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

🏷️ SOA0ms

Field	Value
Serial	2411932402
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 — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

53ms

A

65ms

MX

60ms

AAAA

95ms

TXT

244ms

CAA

62ms

HTTPS

104ms

TLSA

372ms

SOA

0ms

MTA-STS

87ms

DNSSEC

120ms

SRV

108ms

Total

1477ms

🕐 Scan History

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