by-jacobsen.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 1 February 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.30.213.15 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mx1.pub.mailpod11-cph3.one.com, mx2.pub.mailpod11-cph3.one.com and 2 more. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 46.30.213.15 | 3600s | webcluster1.webpod12-cph3.one.com | AS51468 | One.com A/S | 46.30.208.0/21 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod11-cph3.one.com | 104.37.34.230 | mx1.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod11-cph3.one.com | 104.37.34.231 | mx2.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod11-cph3.one.com | 104.37.34.232 | mx3.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod11-cph3.one.com | 104.37.34.233 | mx4.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:10a:7f:3251:3a6c:fc84 | 3600s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| www | 46.30.213.15 2a02:2350:5:10a:7f:3251:3a6c:fc84 (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network by-jacobsen.dk: 46.30.213.15 2a02:2350:5:10a:7f:3251:3a6c:fc84 (AS51468) www.by-jacobsen.dk: 46.30.213.15 2a02:2350:5:10a:7f:3251:3a6c:fc84 (AS51468) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 24F573980561755185B794745411B05D… |
| SMTP _25._tcp.mx2.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 24F573980561755185B794745411B05D… |
| SMTP _25._tcp.mx3.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 24F573980561755185B794745411B05D… |
| SMTP _25._tcp.mx4.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 24F573980561755185B794745411B05D… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026101302 |
| 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 | ONE.COM A/S |
| Registered | 2022-02-01 |
| Expires | 2027-01-31 (105d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 19:27:22 shown | 2042ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-04 05:56:08 | 644ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-02 04:23:26 | 935ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-01 04:19:15 | 691ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-29 19:49:20 | 527ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-07 08:45:55 | 626ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-31 12:48:58 | 2342ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-27 03:50:39 | 769ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-13 20:02:48 | 1143ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-03 23:03:53 | 889ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-21 09:27:09 | 6785ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-03 14:51:03 | 8932ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-30 14:38:37 | 692ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-26 04:08:17 | 1721ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 18:21:16 | 4799ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 18:08:49 | 2416ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 18:02:58 | 494ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 18:00:46 | 2654ms | 2 NS 1 A 4 MX | 🔒 Secure |