alster.dk

📜 Historical scan 2026-07-20 14:06:50 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

alster.dk is a .dk domain served by 2 nameservers (grace.ns.cloudflare.com, henry.ns.cloudflare.com). It was registered on 22 January 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.77.34 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by amir.mx.cloudflare.net, isaac.mx.cloudflare.net and 1 more. The zone is DNSSEC-signed and validates, has no DMARC policy and is reachable over IPv6. 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 59ms

Nameserver	IP addresses	PTR	ASN / ISP
grace.ns.cloudflare.com	108.162.192.159 172.64.32.159 173.245.58.159 2606:4700:50::adf5:3a9f 2803:f800:50::6ca2:c09f 2a06:98c1:50::ac40:209f	grace.ns.cloudflare.com grace.ns.cloudflare.com grace.ns.cloudflare.com grace.ns.cloudflare.com grace.ns.cloudflare.com grace.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
henry.ns.cloudflare.com	108.162.193.176 172.64.33.176 173.245.59.176 2606:4700:58::adf5:3bb0 2803:f800:50::6ca2:c1b0 2a06:98c1:50::ac40:21b0	henry.ns.cloudflare.com henry.ns.cloudflare.com henry.ns.cloudflare.com henry.ns.cloudflare.com henry.ns.cloudflare.com henry.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 68ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.77.34	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.204.2	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

3 records 85ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
22	300s	amir.mx.cloudflare.net	162.159.205.11 162.159.205.12 162.159.205.13 2606:4700:f5::11 2606:4700:f5::12 2606:4700:f5::13	route1.mx.cloudflare.net route1.mx.cloudflare.net route1.mx.cloudflare.net route3.mx.cloudflare.net route3.mx.cloudflare.net route3.mx.cloudflare.net	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
23	300s	isaac.mx.cloudflare.net	162.159.205.17 162.159.205.18 162.159.205.19 2606:4700:f5::10 2606:4700:f5::e 2606:4700:f5::f	route2.mx.cloudflare.net route2.mx.cloudflare.net route2.mx.cloudflare.net route2.mx.cloudflare.net route2.mx.cloudflare.net route2.mx.cloudflare.net	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
32	300s	linda.mx.cloudflare.net	162.159.205.23 162.159.205.24 162.159.205.25 2606:4700:f5::b 2606:4700:f5::c 2606:4700:f5::d	route3.mx.cloudflare.net route3.mx.cloudflare.net route3.mx.cloudflare.net route1.mx.cloudflare.net route1.mx.cloudflare.net route1.mx.cloudflare.net	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🔷 AAAA Records (IPv6)#

2 records 69ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:4d22	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:cc02	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 73ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.77.34,172.67.204.2 ech=AEX+DQBBSAAgACDBylgj3ctSwVyLMNrLTugtPOHghxFhjSHQxl7hGvjLDgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:4d22,2606:4700:3037::ac43:cc02

📝 TXT Records#

3 records 255ms

TXT Record
_ao4ry9lmtr1e9lt945hhgnr2dj1iyhn
google-site-verification=3eOqehlCsm_tAehDGBj99_2K6FAO3FSymBiFjhX3vL4
v=spf1 include:_spf.mx.cloudflare.net ~all

✉️ SPF#

Policy	Record (alster.dk)
~all (soft fail)	v=spf1 include:_spf.mx.cloudflare.net ~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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-12 10:04:18

www	104.21.77.34 172.67.204.2 2606:4700:3031::6815:4d22 2606:4700:3037::ac43:cc02 (AS13335) (address records, no CNAME)
www vs bare domain	Same network alster.dk: 104.21.77.34 172.67.204.2 2606:4700:3031::6815:4d22 2606:4700:3037::ac43:cc02 (AS13335) www.alster.dk: 104.21.77.34 172.67.204.2 2606:4700:3031::6815:4d22 2606:4700:3037::ac43:cc02 (AS13335)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	Delete signal: the zone asks the registry to remove its DS (go insecure) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.alster.dk	TLMaWQg0DrMifAPnBmPCYn6kjVXEBjIgFvZzLnf4UZc
TXT	_acme-challenge.alster.dk	YQZIDEwp8LAS7xVU-WfULQCmkiwSyaDkTTGWyXVzryA

🔗 TLSA / DANE#

9 records 8086ms

Service / Owner	Type	Cert association
SMTP _25._tcp.amir.mx.cloudflare.net	DANE-TA · SPKI · SHA-256	59E738E674221702AF1EDB87C5200C1A…
SMTP _25._tcp.amir.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	0F0C6C164A36F97E7B4C5A5B69D6F4F2…
SMTP _25._tcp.amir.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	9BE5B7D47F9EFF930C11EB04D27CAE6B…
SMTP _25._tcp.isaac.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	0F0C6C164A36F97E7B4C5A5B69D6F4F2…
SMTP _25._tcp.isaac.mx.cloudflare.net	DANE-TA · SPKI · SHA-256	59E738E674221702AF1EDB87C5200C1A…
SMTP _25._tcp.isaac.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	9BE5B7D47F9EFF930C11EB04D27CAE6B…
SMTP _25._tcp.linda.mx.cloudflare.net	DANE-TA · SPKI · SHA-256	59E738E674221702AF1EDB87C5200C1A…
SMTP _25._tcp.linda.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	0F0C6C164A36F97E7B4C5A5B69D6F4F2…
SMTP _25._tcp.linda.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	9BE5B7D47F9EFF930C11EB04D27CAE6B…

🔐 DNSSEC#

177ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2409942569
Primary NS (MNAME)	grace.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-08 22:35:48

Field	Value
Registrar	Simply.com A/S
Registered	2014-01-22
Expires	2027-01-31 (106d)

📋 WHOIS#

⏱️ Lookup Timing#

59ms

68ms

85ms

AAAA

69ms

TXT

255ms

CAA

58ms

HTTPS

73ms

TLSA

8086ms

SOA

0ms

MTA-STS

109ms

DNSSEC

177ms

SRV

105ms

Total

9573ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 10:04:18	2911ms	2 NS 2 A 3 MX	🔓 Insecure
2026-10-05 16:44:58	721ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-24 15:13:15	1667ms	2 NS 2 A 3 MX	🔒 Secure
2026-09-21 00:28:55	2149ms	2 NS 2 A 3 MX	🔒 Secure
2026-09-09 00:02:01	2225ms	2 NS 2 A 3 MX	🔒 Secure
2026-09-01 19:23:07	1493ms	2 NS 2 A 3 MX	🔒 Secure
2026-09-01 02:56:16	1601ms	2 NS 2 A 3 MX	🔒 Secure
2026-08-29 00:36:44	832ms	2 NS 2 A 3 MX	🔒 Secure
2026-08-26 16:41:31	925ms	2 NS 2 A 3 MX	🔒 Secure
2026-08-24 14:49:19	4645ms	2 NS 2 A 3 MX	🔒 Secure
2026-08-07 22:38:28	1836ms	2 NS 2 A 3 MX	🔒 Secure
2026-07-20 14:06:50 shown	9573ms	2 NS 2 A 3 MX	🔒 Secure
2026-07-16 11:30:53	10737ms	2 NS 2 A 3 MX	🔒 Secure
2026-07-09 00:57:25	9717ms	2 NS 2 A 3 MX	🔒 Secure
2026-06-21 06:28:08	1152ms	2 NS 2 A 3 MX	🔒 Secure
2026-06-20 21:46:02	1332ms	2 NS 2 A 3 MX	🔒 Secure
2026-06-16 12:49:08	2825ms	2 NS 2 A 3 MX	🔒 Secure