poscentrum.dk

📜 Historical scan 2026-06-24 08:19:46 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

poscentrum.dk is a .dk domain served by 4 nameservers (ns1.nexcess.net, ns2.nexcess.net, ns3.nexcess.net and 1 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 104.16.81.94 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. The zone is of unknown DNSSEC status, 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#

4 records 74ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.nexcess.net	192.240.188.188 2607:f7c0:8001::a	— —	AS36444 Liquid Web, L.L.C AS36444 Liquid Web, L.L.C
ns2.nexcess.net	192.240.188.166 2607:f7c0:8002::a	— —	AS36444 Liquid Web, L.L.C AS36444 Liquid Web, L.L.C
ns3.nexcess.net	192.240.188.144 2607:f7c0:8001::b	— —	AS36444 Liquid Web, L.L.C AS36444 Liquid Web, L.L.C
ns4.nexcess.net	192.240.188.122 2607:f7c0:8002::b	— —	AS36444 Liquid Web, L.L.C AS36444 Liquid Web, L.L.C

🌍 A Records#

2 records 70ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.16.81.94	600s	—	AS13335	Cloudflare, Inc.	104.16.0.0/14	—	—
104.16.82.94	600s	—	AS13335	Cloudflare, Inc.	104.16.0.0/14	—	—

📧 MX Records#

5 records 118ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	600s	aspmx.l.google.com	2a00:1450:4025:c01::1a 64.233.162.26	rd-in-f26.1e100.net li-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	600s	alt1.aspmx.l.google.com	172.253.158.26 2404:6800:4000:1025::1b	so-in-f26.1e100.net lcbomp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	600s	alt2.aspmx.l.google.com	108.177.125.27 2404:6800:4003:c26::1a	tp-in-f27.1e100.net so-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	600s	alt3.aspmx.l.google.com	108.177.125.27 2404:6800:4008:c01::1a	tp-in-f27.1e100.net tp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	600s	alt4.aspmx.l.google.com	192.178.230.27 2607:f8b0:400e:c1e::1b	yunrtab-in-f27.1e100.net yudlsqd-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

🔌 SRV Records#

1 records 187ms

Service	Priority	Weight	Port	Target
_imaps._tcp	0	1	993	mail.poscentrum.dk

📝 TXT Records#

4 records 308ms

TXT Record
v = spf1 ip4: 185.99.128.0/22 mx
v = spf1 ip4: 213.189.0.0/23 mx
v=spf1 +a +mx +ip4:185.145.13.166 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 +ip4:185.145.13.166 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)

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.poscentrum.dk	poscentrum.dk.f84a974ac01ba2f6.dcv.cloudflare.com

🔗 TLSA / DANE#

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

🔐 DNSSEC#

127ms

Check	Result
Validation Status	❓ Unknown
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	broken trust chain resolving 'poscentrum.dk/DS/IN': 127.0.0.1#53

🏷️ SOA#

53ms

Field	Value
Serial	1747290639
Primary NS (MNAME)	ns1.nexcess.net
Responsible (RNAME)	hostmaster@poscentrum.dk
Refresh	7200s
Retry	2048s
Expire	1048576s
Minimum (neg-cache TTL)	2560s

📋 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#

74ms

70ms

118ms

AAAA

60ms

TXT

308ms

CAA

54ms

HTTPS

144ms

TLSA

132ms

SOA

53ms

MTA-STS

60ms

DNSSEC

127ms

SRV

187ms

Total

1613ms

🕐 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	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 shown	1613ms	4 NS 2 A 5 MX	❓ Unknown
2026-06-17 16:42:07	1478ms	4 NS 2 A 5 MX	🔓 Insecure