kereby.dk DNS records

🖥️ Nameservers2 records 106ms

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 114ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.41.135	600s	linux24.curanet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records2 records 88ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	600s	d240256.a.ess.uk.barracudanetworks.com	18.133.136.186 18.133.136.187 18.133.136.188	mail.ess.uk.barracuda.com mail.ess.uk.barracuda.com mail.ess.uk.barracuda.com	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
99	600s	d240256.b.ess.uk.barracudanetworks.com	18.133.136.186 18.133.136.187 18.133.136.188	mail.ess.uk.barracuda.com mail.ess.uk.barracuda.com mail.ess.uk.barracuda.com	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.40

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 258ms

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

📝 TXT Records6 records 383ms

TXT Record
anthropic-domain-verification-pnaz1c=6xR6RIMXXVz2xHKSaAZhs8MtT
apple-domain-verification=agfLioffzwTEZW5K
globalsign-domain-verification=75E793019835AF06C57E22BCCB4A2D06
google-site-verification=QlqaGCTsrlQvGiIDOpJinPxwYNBGhAF6rx4vGSTEChY
MS=ms54817053
v=spf1 include:spf.protection.outlook.com mx ip4:185.193.121.110 ip4:185.193.121.108 ip4:51.144.163.171 include:_spf.signicat.cloud include:spf.lmmail.dk include:spf.ess.uk.barracudanetworks.com -all

✉️ SPF

Policy	Record (kereby.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com mx ip4:185.193.121.110 ip4:185.193.121.108 ip4:51.144.163.171 include:_spf.signicat.cloud include:spf.lmmail.dk include:spf.ess.uk.barracudanetworks.com -all

📨 DMARC

Policy	Record (_dmarc.kereby.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:DMARC_rua@kereby.dk; ruf=mailto:it-support@kereby.dk; pct=100;

📬 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)

🔐 DNSSEC284ms

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

🏷️ SOA0ms

Field	Value
Serial	2026082901
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

106ms

A

114ms

MX

88ms

AAAA

91ms

TXT

383ms

CAA

85ms

HTTPS

103ms

TLSA

193ms

SOA

0ms

MTA-STS

144ms

DNSSEC

284ms

SRV

258ms

Total

1950ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-29 15:06:15	1950ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-08-20 01:03:51	2248ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-23 12:15:40	1113ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-22 10:21:23	5053ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-21 05:41:30	9049ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-11 20:12:14	6942ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-10 11:37:03	5150ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-21 06:05:14	741ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-17 11:39:51	1280ms	2 NS 1 A 2 MX	🔒 Secure	View