dulong.dk

📜 Historical scan 2026-06-17 05:00:31 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

dulong.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 9 January 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 23.227.38.32 is hosted by Cloudflare, Inc. (AS13335) in Canada. Mail is handled by mx.simply.com. The zone is DNSSEC-signed but currently fails validation, has no 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#

4 records 149ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	—	—	—
ns2.simply.com	—	—	—
ns3.simply.com	—	—	—
ns4.simply.com	—	—	—

🌍 A Records#

1 records 125ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
23.227.38.32	—	myshopify.com	AS13335	Cloudflare, Inc.	23.227.38.0/23	🇨🇦 Canada	Ottawa

📧 MX Records#

1 records 118ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mx.simply.com	94.231.106.20	mx.simply.com	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 275ms

TXT Record
google-site-verification=n1QQfwP9Lpa8T8AmXezP_ftOFS4vTqmPWw5DRo1FBVs
v=spf1 include:spf.simply.com ?all

✉️ SPF#

Policy	Record (dulong.dk)
?all (neutral)	v=spf1 include:spf.simply.com ?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 2026-10-11 18:52:50

www CNAME	shops.myshopify.com (all on myshopify.com) → 23.227.38.74 2620:127:f00f:e:: (AS13335)
www vs bare domain	Same network dulong.dk: 23.227.38.32 (AS13335) www.dulong.dk: 23.227.38.74 2620:127:f00f:e:: (AS13335)
Wildcard	No
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: ?all

warn "?all" is neutral: it gives receivers no guidance, much like having no SPF

🔗 TLSA / DANE#

2 records 182ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx.simply.com	DANE-EE · SPKI · SHA-256	97A3BA009F39C761BFFB6574340E8138…
SMTP _25._tcp.mx.simply.com	DANE-EE · SPKI · SHA-256	A9D603AF4D7ED6B9246B4B68500CD6F2…

🔐 DNSSEC#

297ms

Check	Result
Validation Status	⚠️ Bogus
AD Flag (resolver validates)	✗ Not set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	resolution failed: insecurity proof failed

🏷️ SOA#

158ms

Field	Value
Serial	2025042300
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-01 11:45:44

Field	Value
Registrar	Simply.com A/S
Registered	2002-01-09
Expires	2027-03-31 (160d)

📋 WHOIS#

⏱️ Lookup Timing#

149ms

125ms

118ms

AAAA

179ms

TXT

275ms

CAA

150ms

HTTPS

195ms

TLSA

182ms

SOA

158ms

MTA-STS

163ms

DNSSEC

297ms

SRV

0ms

Total

1525ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 11:12:15	1691ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-25 10:33:33	555ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-25 01:45:16	712ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-23 12:42:16	726ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-20 18:06:06	511ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-17 05:24:39	20653ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-17 05:08:05	406ms	4 NS 1 A 1 MX	⚠️ Bogus
2026-06-17 05:00:33	1022ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-17 05:00:31 shown	1525ms	4 NS 1 A 1 MX	⚠️ Bogus