poscentrum.dk is a .dk domain served by 2 nameservers (summer.ns.cloudflare.com, yisroel.ns.cloudflare.com). 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 104.21.9.237 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 not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 104.21.9.237 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.131.18 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:9ed | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:8312 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.9.237,172.67.131.18 ech=AEX+DQBB8AAgACBQtB3/bF2MkiwRKDn2FbKQD5Xovg4XyRyecJV8EQBgHQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:9ed,2606:4700:3034::ac43:8312 |
| 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 |
| 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 |
| Policy | Record (_dmarc.poscentrum.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| p=none (monitor only) | v=DMARC1;p=none; |
| 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 |
| 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.
DNS lookups: 5/10 · policy: ~all
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2416756966 |
| Primary NS (MNAME) | summer.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2015-04-23 |
| Expires | 2027-04-30 (195d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-06 12:11:39 shown | 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 | 1613ms | 4 NS 2 A 5 MX | ❓ Unknown |
| 2026-06-17 16:42:07 | 1478ms | 4 NS 2 A 5 MX | 🔓 Insecure |