altero.dk

Records from scan: 2026-09-30 14:51:17 · 963ms total · last checked 2026-10-19 10:28 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

altero.dk is a .dk domain served by 2 nameservers (ns1.123hotel.dk, ns2.123hotel.dk). It was registered on 26 May 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.141 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx.spamfilter.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 our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 39ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.123hotel.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.123hotel.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 34ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.40.141	3600s	web133.123hotel.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

1 records 48ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mx.spamfilter.io	46.36.212.34 46.36.212.36 46.36.212.37 46.36.212.38 89.188.78.64 89.188.78.65 89.188.78.66 94.231.106.12	node4.spamfilter.io node8.spamfilter.io node6.spamfilter.io node7.spamfilter.io node3.spamfilter.io node9.spamfilter.io node10.spamfilter.io node2.spamfilter.io	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover-mf.onlinemail.io → 185.21.40.62
🔶 Autoconfig	autoconfig-mf.onlinemail.io → 185.21.40.62

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 171ms

TXT Record
google-site-verification=KVz62m3IwgpUYCDAdsm8ot9VNa7GOnklQwZod5gOvYA
v=spf1 a include:spf.curanet.dk include:spf.spamfilter.io include:mailgun.org ~all

✉️ SPF#

Policy	Record (altero.dk)
~all (soft fail)	v=spf1 a include:spf.curanet.dk include:spf.spamfilter.io include:mailgun.org ~all

📨 DMARC#

Policy	Record (_dmarc.altero.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc@altero.dk; ruf=mailto:dmarc@altero.dk; pct=100; fo=s;

📬 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#

checked 2026-10-07 20:57:53

www	185.21.40.141 (AS48854) (address records, no CNAME)
www vs bare domain	Same network altero.dk: 185.21.40.141 (AS48854) www.altero.dk: 185.21.40.141 (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
s1	—	RSA · ~1024 bit below 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#

1 records 109ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx.spamfilter.io	DANE-EE · SPKI · SHA-256	9A25F05F2E322DABDCC9B7A06AB47A2D…

🔐 DNSSEC#

97ms

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

🏷️ SOA#

42ms

Field	Value
Serial	2025091701
Primary NS (MNAME)	ns1.123hotel.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-20 00:04:57

Field	Value
Registrar	CURANET A/S
Registered	1998-05-26
Expires	2027-06-30 (253d)

🔗 Same registrant#

4 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
adcms.dk	CURANET A/S
cmsdemo.dk	CURANET A/S
dblnet.dk	Punktum dk A/S (direct)
faggrupper.dk	CURANET A/S

📋 WHOIS#

⏱️ Lookup Timing#

39ms

34ms

48ms

AAAA

54ms

TXT

171ms

CAA

46ms

HTTPS

45ms

TLSA

109ms

SOA

42ms

MTA-STS

63ms

DNSSEC

97ms

SRV

58ms

Total

963ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 14:51:17 shown	963ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-10 09:05:57	527ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-04 03:35:38	516ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-28 11:46:30	1795ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 13:24:32	2637ms	2 NS 1 A 1 MX	🔒 Secure