buchcopenhagen.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 13 November 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 86.48.72.41 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by mx1.pub.mailpod12-cph3.one.com, mx2.pub.mailpod12-cph3.one.com and 2 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 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 |
|---|---|---|---|---|---|---|---|
| 86.48.72.41 | 3600s | sumo04.solido.net | AS47292 | Sentia Denmark A/S | 86.48.72.0/21 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod12-cph3.one.com | 104.37.34.246 | mx1.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod12-cph3.one.com | 104.37.34.247 | mx2.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod12-cph3.one.com | 104.37.34.248 | mx3.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod12-cph3.one.com | 104.37.34.249 | mx4.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| TXT Record |
|---|
| google-site-verification=dNPkEZeVy_p7pXYKNzQvUivF9HwIyeqiotakT__4_-4 |
| klaviyo-site-verification=UJGdxB |
| v=spf1 include:_custspf.one.com include:sendgrid.net include:mailgun.org ~all |
| Policy | Record (buchcopenhagen.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_custspf.one.com include:sendgrid.net include:mailgun.org ~all |
| Policy | Record (_dmarc.buchcopenhagen.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 86.48.72.41 (AS47292) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u16150706.wl207.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u16150706.wl207.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: 8/10 · policy: ~all
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 2CDDC5D748A3C02AC19FF7BC33AA01A5… |
| SMTP _25._tcp.mx2.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 2CDDC5D748A3C02AC19FF7BC33AA01A5… |
| SMTP _25._tcp.mx3.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 2CDDC5D748A3C02AC19FF7BC33AA01A5… |
| SMTP _25._tcp.mx4.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 2CDDC5D748A3C02AC19FF7BC33AA01A5… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026100401 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2010-11-13 |
| Expires | 2026-11-30 (38d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-05 04:03:11 shown | 1483ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-18 17:01:32 | 838ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-06 13:23:38 | 1545ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-08 15:47:05 | 4923ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-19 17:39:15 | 1202ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-07 04:32:52 | 9358ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-04 19:35:18 | 1078ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-03 14:52:03 | 856ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-26 00:17:28 | 693ms | 2 NS 1 A 4 MX | ❓ Unknown |
| 2026-06-16 17:39:57 | 2383ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 17:30:57 | 715ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 17:30:20 | 4411ms | 2 NS 1 A 4 MX | 🔒 Secure |