extensio.dk

📜 Historical scan 2026-06-17 09:09:50 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

extensio.dk is a .dk domain served by 2 nameservers (ns1.aveo.dk, ns2.aveo.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.41.231 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. 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 55ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.aveo.dk	—	—	—
ns2.aveo.dk	—	—	—

🌍 A Records#

1 records 74ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.41.231	—	linux30.curanet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

2 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mx1.onlinemail.io	185.21.42.12	mx1.onlinemail.io	AS48854 team.blue Denmark A/S
20	—	mx2.onlinemail.io	46.36.208.16	mx2.onlinemail.io	AS48854 team.blue Denmark A/S

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 135ms

TXT Record
MS=ms70758790
v=spf1 a mx include:spf.hostedin.cloud include:spf.curanet.dk include:web.shared.mysmtp.com ~all

✉️ SPF#

Policy	Record (extensio.dk)
~all (soft fail)	v=spf1 a mx include:spf.hostedin.cloud include:spf.curanet.dk include:web.shared.mysmtp.com ~all

📨 DMARC#

Policy	Record (_dmarc.extensio.dk)
p=none (monitor only)	v=DMARC1; p=none; sp=none; rf=afrf; pct=100; ri=86400

📬 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 2026-10-09 15:25:48

www CNAME	extensio.dk (all on extensio.dk) → 185.21.41.231 (AS48854)
www vs bare domain	Same network extensio.dk: 185.21.41.231 (AS48854) www.extensio.dk: 185.21.41.231 (AS48854)
Wildcard	No
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	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: 10/10 · policy: ~all

warn 10 of the 10 allowed DNS lookups used: one more include can break SPF

🔗 TLSA / DANE#

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

🔐 DNSSEC#

163ms

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

🏷️ SOA#

57ms

Field	Value
Serial	2025052301
Primary NS (MNAME)	ns1.aveo.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

55ms

74ms

39ms

AAAA

72ms

TXT

135ms

CAA

42ms

HTTPS

44ms

TLSA

127ms

SOA

57ms

MTA-STS

67ms

DNSSEC

163ms

SRV

0ms

Total

968ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 10:12:51	344ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-15 15:00:12	565ms	2 NS 1 A 2 MX	🔒 Secure
2026-08-28 06:20:52	576ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-25 18:22:24	1341ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-17 09:09:50 shown	968ms	2 NS 1 A 2 MX	🔒 Secure