roskildetandteknik.dk

📜 Historical scan 2026-07-03 14:04:04 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

roskildetandteknik.dk is a .dk domain served by 2 nameservers (dave.ns.cloudflare.com, marge.ns.cloudflare.com). It was registered on 15 May 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.30.226 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.flexmail.dk. The zone is not DNSSEC-signed, publishes a 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 511ms

Nameserver	IP addresses	PTR	ASN / ISP
dave.ns.cloudflare.com	108.162.193.109 172.64.33.109 173.245.59.109 2606:4700:58::adf5:3b6d 2803:f800:50::6ca2:c16d 2a06:98c1:50::ac40:216d	dave.ns.cloudflare.com dave.ns.cloudflare.com dave.ns.cloudflare.com dave.ns.cloudflare.com dave.ns.cloudflare.com dave.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
marge.ns.cloudflare.com	108.162.192.191 172.64.32.191 173.245.58.191 2606:4700:50::adf5:3abf 2803:f800:50::6ca2:c0bf 2a06:98c1:50::ac40:20bf	marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.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 494ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.30.226	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.173.229	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 518ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mail.flexmail.dk	57.129.53.233	flex30.flexnet.dk	AS16276 OVH SAS

🔷 AAAA Records (IPv6)#

2 records 457ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::6815:1ee2	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3031::ac43:ade5	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 422ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.30.226,172.67.173.229 ech=AEX+DQBBOAAgACCW/4o7disNaCIGEDzIGlhSyH5lcOpQJ6fU4vdOP5EKNwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:1ee2,2606:4700:3031::ac43:ade5

📝 TXT Records#

2 records 1421ms

TXT Record
google-site-verification=aiAmrtNQPyKOENK2nlM23s_JJvNX9nB-V7D91KZiR8E
v=spf1 a mx include:spf.smtp2go.net include:eu.mailgun.org ~all

✉️ SPF#

Policy	Record (roskildetandteknik.dk)
~all (soft fail)	v=spf1 a mx include:spf.smtp2go.net include:eu.mailgun.org ~all

📨 DMARC#

Policy	Record (_dmarc.roskildetandteknik.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=dmarc-reports@flexnet.dk

📬 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 2026-10-23 18:59:05

www	104.21.30.226 172.67.173.229 2606:4700:3030::6815:1ee2 2606:4700:3031::ac43:ade5 (AS13335) (address records, no CNAME)
www vs bare domain	Same network roskildetandteknik.dk: 104.21.30.226 172.67.173.229 2606:4700:3030::6815:1ee2 2606:4700:3031::ac43:ade5 (AS13335) www.roskildetandteknik.dk: 104.21.30.226 172.67.173.229 2606:4700:3030::6815:1ee2 2606:4700:3031::ac43:ade5 (AS13335)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
default	—	RSA · ~1024 bit below 2048 bit
k1	—	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: 5/10 · policy: ~all

error include:spf.smtp2go.net has no SPF record: receivers that reach it return permerror (RFC 7208 §5.2)

🔗 TLSA / DANE#

1 records 450ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mail.flexmail.dk	DANE-EE · SPKI · SHA-256	5659BBC8C3F5DB85C0D76E135EB0A094…

🔐 DNSSEC#

979ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2408517156
Primary NS (MNAME)	dave.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-04 12:46:33

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2012-05-15
Expires	2027-05-31 (216d)

📋 WHOIS#

⏱️ Lookup Timing#

511ms

494ms

518ms

AAAA

457ms

TXT

1421ms

CAA

490ms

HTTPS

422ms

TLSA

450ms

SOA

0ms

MTA-STS

773ms

DNSSEC

979ms

SRV

596ms

Total

11342ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-23 18:59:05	692ms	2 NS 2 A 1 MX	🔒 Secure
2026-10-15 09:32:25	830ms	2 NS 2 A 1 MX	🔒 Secure
2026-10-14 09:21:02	941ms	2 NS 2 A 1 MX	🔒 Secure
2026-10-04 12:39:21	1531ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-23 11:04:14	929ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-16 10:04:35	636ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-12 13:29:44	777ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-01 15:32:44	3160ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-15 14:08:57	1062ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-06 14:53:14	991ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-05 20:40:07	1176ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-03 14:04:04 shown	11342ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-20 04:07:58	2617ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-17 22:38:51	1052ms	2 NS 2 A 1 MX	🔓 Insecure