colstrupco.dk

📜 Historical scan 2026-07-02 09:37:09 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

colstrupco.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 10 May 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 198.202.211.1 is hosted by Cloudflare London, LLC (AS209242) in United States. Mail is handled by aspmx.l.google.com, smtp.google.com and 4 more. The zone is DNSSEC-signed and validates, publishes a 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#

3 records 53ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 2051ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
198.202.211.1	298s	—	AS209242	Cloudflare London, LLC	198.202.211.0/24	🇺🇸 United States	—

📧 MX Records#

6 records 43ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	aspmx.l.google.com	209.85.233.26 2a00:1450:4010:c02::1a 2a00:1450:4010:c02::1a	lr-in-f26.1e100.net le-in-f26.1e100.net le-in-x1a.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
1	3600s	smtp.google.com	108.177.14.27 173.194.73.26 173.194.73.27 209.85.233.26 209.85.233.27 2a00:1450:4010:c06::1a 2a00:1450:4010:c06::1a 2a00:1450:4010:c06::1b 2a00:1450:4010:c06::1b 2a00:1450:4010:c0b::1a 2a00:1450:4010:c0b::1a 2a00:1450:4010:c0b::1b 2a00:1450:4010:c0b::1b	lt-in-f27.1e100.net lq-in-f26.1e100.net lq-in-f27.1e100.net lr-in-f26.1e100.net lr-in-f27.1e100.net lj-in-x1a.1e100.net lj-in-f26.1e100.net lj-in-f27.1e100.net lj-in-x1b.1e100.net lo-in-f26.1e100.net lo-in-x1a.1e100.net lo-in-x1b.1e100.net lo-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
5	3600s	alt1.aspmx.l.google.com	192.178.158.26 2404:6800:4013:813::1b	lcdels-in-f26.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt2.aspmx.l.google.com	172.253.158.27 2404:6800:4003:c26::1a	so-in-f27.1e100.net so-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	alt3.aspmx.l.google.com	108.177.125.26 2404:6800:4008:c01::1b	tp-in-f26.1e100.net tp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	alt4.aspmx.l.google.com	192.178.230.27 2404:6800:400b:c01b::1a	yunrtab-in-f27.1e100.net yunrtab-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	185.20.205.57
🔶 Autoconfig	maildiscover.simply.com → 94.231.108.222

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 59ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	maildiscover.simply.com

📝 TXT Records#

3 records 142ms

TXT Record
google-site-verification=xGnZQupNJHjnv4TTb9idL4T2hXBXi_G-kpB1Huv_6hQ
v=spf1 include:_spf.google.com ~all
v=spf1 include:spf.simply.com -all

✉️ SPF#

⚠ Multiple SPF records — RFC 7208 §4.5 violation (receivers must treat this as permerror)

Policy	Record (colstrupco.dk)
~all (soft fail)	v=spf1 include:_spf.google.com ~all
-all (hard fail)	v=spf1 include:spf.simply.com -all

📨 DMARC#

Policy	Record (_dmarc.colstrupco.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 2026-10-07 18:56:45

www CNAME	cdn.webflow.com (all on webflow.com) → 198.202.211.1 2620:cb:2000::1 (AS13335 AS209242)
www vs bare domain	Same network colstrupco.dk: 198.202.211.1 (AS209242) www.colstrupco.dk: 198.202.211.1 2620:cb:2000::1 (AS13335 AS209242)
Wildcard	Yes: any name under the zone resolves
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

✍️ DKIM keys#

1 found

Selector	CNAME	Key
google	—	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: 1/10 · policy: ~all

error 2 SPF records: receivers must treat that as a permanent error (RFC 7208 §4.5)

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

159ms

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

🏷️ SOA#

50ms

Field	Value
Serial	2026031002
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 18:49:08

Field	Value
Registrar	Simply.com A/S
Registered	2024-05-10
Expires	2028-05-09 (567d)

📋 WHOIS#

⏱️ Lookup Timing#

53ms

2051ms

43ms

AAAA

52ms

TXT

142ms

CAA

54ms

HTTPS

40ms

TLSA

600ms

SOA

50ms

MTA-STS

64ms

DNSSEC

159ms

SRV

59ms

Total

3202ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 18:08:36	2046ms	3 NS 1 A 6 MX	🔒 Secure
2026-10-01 05:51:59	2388ms	3 NS 1 A 6 MX	🔒 Secure
2026-09-24 18:10:58	1546ms	3 NS 1 A 6 MX	🔒 Secure
2026-08-25 16:04:07	1592ms	3 NS 1 A 6 MX	🔒 Secure
2026-07-02 09:37:09 shown	3202ms	3 NS 1 A 6 MX	🔒 Secure
2026-06-25 16:07:00	1760ms	3 NS 1 A 6 MX	🔒 Secure
2026-06-22 07:48:20	1174ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 20:16:38	5024ms	3 NS 1 A 6 MX	🔒 Secure
2026-06-16 21:50:19	838ms	3 NS 1 A 6 MX	🔒 Secure