opbyg.dk

📜 Historical scan 2026-06-17 13:05:19 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

opbyg.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 9 October 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 152.115.36.112 is hosted by GlobalConnect A/S (AS31027) in Denmark. Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. The zone is not DNSSEC-signed, 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 75ms

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 122ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
152.115.36.112	—	s10.stom.dk	AS31027	GlobalConnect A/S	152.115.0.0/16	🇩🇰 Denmark	—

📧 MX Records#

5 records 138ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	—	aspmx.l.google.com	142.251.1.27 2a00:1450:4010:c07::1b 2a00:1450:4010:c07::1b	lb-in-f27.1e100.net lf-in-x1b.1e100.net lf-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
5	—	alt1.aspmx.l.google.com	192.178.211.26 2404:6800:4000:1025::1a	lcbomp-in-f26.1e100.net lcbomp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	—	alt2.aspmx.l.google.com	108.177.125.27 2404:6800:4008:c01::1b	tp-in-f27.1e100.net tp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	—	alt3.aspmx.l.google.com	108.177.125.27 2404:6800:4008:c01::1b	tp-in-f27.1e100.net tp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	—	alt4.aspmx.l.google.com	173.194.43.27 2607:f8b0:400e:c1e::1a	yudlsqd-in-f27.1e100.net yudlsqd-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 329ms

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

✉️ SPF#

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

📨 DMARC#

Policy	Record (_dmarc.opbyg.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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 16:41:09

www	109.71.58.180 (AS48854) (address records, no CNAME)
www vs bare domain	Same network opbyg.dk: 109.71.58.180 (AS48854) www.opbyg.dk: 109.71.58.180 (AS48854)
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 · ~1024 bit below 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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

303ms

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

🏷️ SOA#

125ms

Field	Value
Serial	2025100100
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 2026-10-03 08:07:08

Field	Value
Registrar	Simply.com A/S
Registered	2020-10-09
Expires	2026-10-31 (10d)

📋 WHOIS#

⏱️ Lookup Timing#

75ms

122ms

138ms

AAAA

76ms

TXT

329ms

CAA

119ms

HTTPS

76ms

TLSA

273ms

SOA

125ms

MTA-STS

251ms

DNSSEC

303ms

SRV

0ms

Total

2683ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 16:41:09	599ms	3 NS 1 A 5 MX	🔓 Insecure
2026-10-03 07:39:20	555ms	3 NS 1 A 5 MX	🔓 Insecure
2026-09-30 07:19:27	676ms	3 NS 1 A 5 MX	🔓 Insecure
2026-09-23 18:48:11	629ms	3 NS 1 A 5 MX	🔓 Insecure
2026-09-23 05:12:07	682ms	3 NS 1 A 5 MX	🔓 Insecure
2026-08-27 06:14:34	996ms	3 NS 1 A 5 MX	🔓 Insecure
2026-06-21 04:12:09	1026ms	3 NS 1 A 5 MX	🔓 Insecure
2026-06-17 13:05:19 shown	2683ms	3 NS 1 A 5 MX	🔓 Insecure