poscentrum.dk

📜 Historical scan 2026-07-21 09:25:38 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

poscentrum.dk is a .dk domain served by 6 nameservers (ns10.digicertdns.com, ns11.digicertdns.com, ns12.digicertdns.com and 3 more). It was registered on 23 April 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 136.244.102.136 is hosted by The Constant Company, LLC (AS20473) in The Netherlands. 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#

6 records 62ms

Nameserver	IP addresses	PTR	ASN / ISP
ns10.digicertdns.com	208.94.148.159 2600:1800::1:1f	ns10.digicertdns.com ns10.digicertdns.com	AS16552 Tiggee LLC AS16552 Tiggee LLC
ns11.digicertdns.com	208.80.124.159 2600:1801:1::1:1f	ns11.digicertdns.com ns11.digicertdns.com	AS16552 Tiggee LLC AS16552 Tiggee LLC
ns12.digicertdns.com	208.80.126.159 2600:1802:2::1:1f	ns12.digicertdns.com ns12.digicertdns.com	AS16552 Tiggee LLC AS16552 Tiggee LLC
ns13.digicertdns.net	208.80.125.159 2600:1801:3::1:1f	ns13.digicertdns.net ns13.digicertdns.net	AS16552 Tiggee LLC AS16552 Tiggee LLC
ns14.digicertdns.net	208.80.127.159 2600:1802:4::1:1f	ns14.digicertdns.net ns14.digicertdns.net	AS16552 Tiggee LLC AS16552 Tiggee LLC
ns15.digicertdns.net	208.94.149.159 2600:1800:8::1:1f	ns15.digicertdns.net ns15.digicertdns.net	AS16552 Tiggee LLC AS16552 Tiggee LLC

🌍 A Records#

1 records 52ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
136.244.102.136	300s	136.244.102.136.vultrusercontent.com	AS20473	The Constant Company, LLC	136.244.64.0/18	🇳🇱 The Netherlands	Amsterdam

📧 MX Records#

5 records 57ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	300s	aspmx.l.google.com	142.251.9.26 2a00:1450:4025:c03::1a	rc-in-f26.1e100.net rc-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	300s	alt1.aspmx.l.google.com	192.178.211.27 2404:6800:4000:1025::1a	lcbomp-in-f27.1e100.net lcbomp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	300s	alt2.aspmx.l.google.com	172.253.158.27 2404:6800:4003:c26::1b	so-in-f27.1e100.net so-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	300s	alt3.aspmx.l.google.com	172.253.158.26 2404:6800:4003:c26::1b	so-in-f26.1e100.net so-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	300s	alt4.aspmx.l.google.com	192.178.230.26 2404:6800:400b:c01b::1b	yunrtab-in-f26.1e100.net yunrtab-in-f27.1e100.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#

4 records 244ms

TXT Record
v = spf1 ip4: 185.99.128.0/22 mx
v = spf1 ip4: 213.189.0.0/23 mx
v=spf1 +a +mx ip4:136.244.102.136 include:relay.mailchannels.net include:_spf.google.com include:spf.multisafepay.com ~all
v=spf1 include:_spf.google.com ~all

✉️ SPF#

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

Policy	Record (poscentrum.dk)
~all (soft fail)	v=spf1 +a +mx ip4:136.244.102.136 include:relay.mailchannels.net include:_spf.google.com include:spf.multisafepay.com ~all
~all (soft fail)	v=spf1 include:_spf.google.com ~all

📨 DMARC#

Policy	Record (_dmarc.poscentrum.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 2026-10-13 00:05:53

www	104.21.9.237 172.67.131.18 2606:4700:3030::6815:9ed 2606:4700:3034::ac43:8312 (AS13335) (address records, no CNAME)
www vs bare domain	Same network poscentrum.dk: 104.21.9.237 172.67.131.18 2606:4700:3030::6815:9ed 2606:4700:3034::ac43:8312 (AS13335) www.poscentrum.dk: 104.21.9.237 172.67.131.18 2606:4700:3030::6815:9ed 2606:4700:3034::ac43:8312 (AS13335)
Wildcard	No

✍️ DKIM keys#

3 found

Selector	CNAME	Key
default	—	RSA · ~2048 bit
s1	s1.domainkey.u6036373.wl124.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u6036373.wl124.sendgrid.net	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: 5/10 · 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#

185ms

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	2009010112
Primary NS (MNAME)	ns10.digicertdns.com
Responsible (RNAME)	dns@digicertdns.com
Refresh	43200s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	180s

📋 Registration#

WHOIS fetched 2026-10-06 12:15:50

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2015-04-23
Expires	2027-04-30 (194d)

📋 WHOIS#

⏱️ Lookup Timing#

62ms

52ms

57ms

AAAA

57ms

TXT

244ms

CAA

65ms

HTTPS

58ms

TLSA

16053ms

SOA

0ms

MTA-STS

69ms

DNSSEC

185ms

SRV

99ms

Total

17308ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-06 12:11:39	3227ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-30 09:54:56	733ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-09 07:18:50	1819ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-21 09:25:38 shown	17308ms	6 NS 1 A 5 MX	🔓 Insecure
2026-07-19 15:55:49	1639ms	6 NS 1 A 5 MX	🔓 Insecure
2026-06-30 03:05:23	1130ms	4 NS 2 A 5 MX	🔓 Insecure
2026-06-24 08:19:46	1613ms	4 NS 2 A 5 MX	❓ Unknown
2026-06-17 16:42:07	1478ms	4 NS 2 A 5 MX	🔓 Insecure