ctfsyn.dk DNS records

🖥️ Nameservers3 records 26ms

Nameserver	IP addresses	PTR	ASN / ISP
ns4.hostonline.dk	217.195.185.243 2a02:188:6004:14::10	ns4.hostonline.dk ns4.hostonline.dk	AS31027 GlobalConnect A/S AS31027 GlobalConnect A/S
ns5.hostonline.dk	217.195.185.244 2a02:188:6004:14::11	ns5.hostonline.dk ns5.hostonline.dk	AS31027 GlobalConnect A/S AS31027 GlobalConnect A/S
ns6.hostonline.dk	85.191.126.85	ns6.hostonline.dk	AS204274 AURA Fiber A/S

🌍 A Records1 records 27ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
217.195.185.219	3600s	webhotel11.hostonline.dk	AS31027	GlobalConnect A/S	217.195.176.0/20	🇩🇰 Denmark	—

📧 MX Records1 records 22ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	ctfsyn-dk.mail.protection.outlook.com	2a01:111:f403:c967::8 2a01:111:f403:ca04::d 2a01:111:f403:ca09::5 2a01:111:f403:ca48::8 52.101.68.10 52.101.73.123 52.101.73.126 52.101.73.26	mail-cpjpr04cu00100.inbound.protection.outlook.com mail-db6pr03cu00105.inbound.protection.outlook.com mail-am1pr04cu00105.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-am6pr02cu00203.inbound.protection.outlook.com mail-am8pr83cu00106.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 → 40.104.116.40

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 33ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records2 records 95ms

TXT Record
MS=ms55396807
v=spf1 ip4:217.195.185.219 include:_spf.hostonline.dk include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (ctfsyn.dk)
-all (hard fail)	v=spf1 ip4:217.195.185.219 include:_spf.hostonline.dk include:spf.protection.outlook.com -all

📨 DMARC

Policy	Record (_dmarc.ctfsyn.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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)

🔐 DNSSEC102ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✓ Found
Flags	unsigned answer

🏷️ SOA0ms

Field	Value
Serial	2026082902
Primary NS (MNAME)	ns4.hostonline.dk
Responsible (RNAME)	hostmaster@hostonline.dk
Refresh	86400s
Retry	7200s
Expire	3600000s
Minimum (neg-cache TTL)	172800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

26ms

A

27ms

MX

22ms

AAAA

31ms

TXT

95ms

CAA

26ms

HTTPS

17ms

TLSA

358ms

SOA

0ms

MTA-STS

38ms

DNSSEC

102ms

SRV

33ms

Total

869ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-29 22:05:35	869ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-08-24 05:13:16	5682ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-08-20 02:21:28	5998ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-08-15 04:44:15	2088ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-08-09 14:19:03	3326ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-08-06 11:37:32	2309ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-07-30 17:37:33	2472ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-07-25 19:00:23	1469ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-07-21 13:12:15	10406ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-07-16 19:30:40	1419ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-07-11 13:59:40	2305ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-07-05 21:28:27	3146ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-07-01 11:21:04	10952ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-06-28 06:43:09	1725ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-06-26 06:34:22	892ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-06-24 13:08:56	870ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-06-24 11:39:35	2498ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-06-21 05:56:11	1454ms	3 NS 1 A 1 MX	🔓 Insecure	View
2026-06-16 23:10:15	631ms	3 NS 1 A 1 MX	🔓 Insecure	View