3byg.dk DNS records

🖥️ Nameservers2 records 259ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records1 records 219ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
46.30.213.0	3600s	webcluster1.webpod12-cph3.one.com	AS51468	One.com A/S	46.30.208.0/21	🇩🇰 Denmark	Copenhagen

📧 MX Records1 records 240ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	3byg-dk.mail.protection.outlook.com	2a01:111:f403:ca04::8 2a01:111:f403:ca04::a 2a01:111:f403:ca09::2 2a01:111:f403:ca09::d 52.101.68.15 52.101.68.3 52.101.73.24 52.101.73.26	mail-db5pr02cu00100.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-as9pr05cu01305.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db7pr03cu00403.inbound.protection.outlook.com mail-as8pr05cu00300.inbound.protection.outlook.com mail-as9pr05cu01302.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 → 40.104.116.24

🔷 AAAA Records (IPv6)1 records 247ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a02:2350:5:10a:1:4e4d:9082:47f9	3600s	—	AS51468	One.com A/S	2a02:2350:0:0:0:0:0:0/32	🇩🇰 Denmark	Copenhagen

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 435ms

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

📝 TXT Records1 records 943ms

TXT Record
v=spf1 ip4:194.182.135.110 include:spf.protection.outlook.com include:_custspf.one.com -all

✉️ SPF

Policy	Record (3byg.dk)
-all (hard fail)	v=spf1 ip4:194.182.135.110 include:spf.protection.outlook.com include:_custspf.one.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

🔗 TLSA / DANE

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

🔐 DNSSEC698ms

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

🏷️ SOA0ms

Field	Value
Serial	2026081801
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

259ms

A

219ms

MX

240ms

AAAA

247ms

TXT

943ms

CAA

244ms

HTTPS

259ms

TLSA

1074ms

SOA

0ms

MTA-STS

566ms

DNSSEC

698ms

SRV

435ms

Total

8381ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-19 04:29:41	8381ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-18 02:27:43	1200ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-14 19:11:44	5390ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-18 14:28:48	1224ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-15 22:46:50	7558ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-04 15:11:28	1653ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-20 18:59:00	2344ms	2 NS 1 A 1 MX	⚠️ Bogus	View
2026-06-20 08:37:24	655ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-19 15:06:07	14469ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-18 09:46:44	4838ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-16 12:58:23	1645ms	2 NS 1 A 1 MX	🔒 Secure	View