c-arentsen.dk

📜 Historical scan 2026-06-16 18:50:50 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

c-arentsen.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 17 October 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.199.108.153 is hosted by Fastly, Inc. (AS54113) in United States. Mail is handled by mx.simply.com. The zone is DNSSEC-signed and validates, 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#

4 records 44ms

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

🌍 A Records#

4 records 41ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.199.108.153	—	cdn-185-199-108-153.github.com	AS54113	Fastly, Inc.	185.199.108.0/22	🇺🇸 United States	—
185.199.109.153	—	cdn-185-199-109-153.github.com	AS54113	Fastly, Inc.	185.199.108.0/22	🇺🇸 United States	—
185.199.110.153	—	cdn-185-199-110-153.github.com	AS54113	Fastly, Inc.	185.199.108.0/22	🇺🇸 United States	—
185.199.111.153	—	cdn-185-199-111-153.github.com	AS54113	Fastly, Inc.	185.199.108.0/22	🇺🇸 United States	—

📧 MX Records#

1 records 80ms

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)#

4 records 128ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:50c0:8000::153	—	—	AS54113	Fastly, Inc.	2606:50c0:8000:0:0:0:0:0/46	🇺🇸 United States	—
2606:50c0:8001::153	—	—	AS54113	Fastly, Inc.	2606:50c0:8000:0:0:0:0:0/46	🇺🇸 United States	—
2606:50c0:8002::153	—	—	AS54113	Fastly, Inc.	2606:50c0:8000:0:0:0:0:0/46	🇺🇸 United States	—
2606:50c0:8003::153	—	—	AS54113	Fastly, Inc.	2606:50c0:8000:0:0:0:0:0/46	🇺🇸 United States	—

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 188ms

TXT Record
v=spf1 include:spf.simply.com -all

✉️ SPF#

Policy	Record (c-arentsen.dk)
-all (hard fail)	v=spf1 include:spf.simply.com -all

📨 DMARC#

Policy	Record (_dmarc.c-arentsen.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com;

📬 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 2026-10-08 09:40:20

www CNAME	carentsen.github.io (all on github.io) → 185.199.108.153 185.199.109.153 185.199.110.153 185.199.111.153 2606:50c0:8000::153 2606:50c0:8001::153 2606:50c0:8002::153 2606:50c0:8003::153 (AS54113)
www vs bare domain	Same network c-arentsen.dk: 185.199.108.153 185.199.109.153 185.199.110.153 185.199.111.153 (AS54113) www.c-arentsen.dk: 185.199.108.153 185.199.109.153 185.199.110.153 185.199.111.153 (AS54113)
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

No problems found

🔗 TLSA / DANE#

2 records 61ms

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#

117ms

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

🏷️ SOA#

79ms

Field	Value
Serial	2025101112
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 2026-10-02 07:16:08

Field	Value
Registrar	Simply.com A/S
Registered	2016-10-17
Expires	2026-10-31 (13d)

📋 WHOIS#

⏱️ Lookup Timing#

44ms

41ms

80ms

AAAA

128ms

TXT

188ms

CAA

40ms

HTTPS

128ms

TLSA

61ms

SOA

79ms

MTA-STS

80ms

DNSSEC

117ms

SRV

0ms

Total

644ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 06:52:13	906ms	4 NS 4 A 1 MX	🔒 Secure
2026-10-01 06:42:52	757ms	4 NS 4 A 1 MX	🔒 Secure
2026-09-08 05:44:19	1090ms	4 NS 4 A 1 MX	🔒 Secure
2026-08-27 01:12:40	711ms	4 NS 4 A 1 MX	🔒 Secure
2026-08-24 14:38:10	1253ms	4 NS 4 A 1 MX	🔒 Secure
2026-06-16 18:50:50 shown	644ms	4 NS 4 A 1 MX	🔒 Secure
2026-06-16 18:40:16	2682ms	4 NS 4 A 1 MX	🔒 Secure