guldbosund.dk is a .dk domain served by 2 nameservers (ns3.hostworld.dk, ns4.hostworld.dk). It was registered on 17 March 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 217.160.220.14 is hosted by IONOS SE (AS8560) in Germany. Mail is handled by guldbosund-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 217.160.220.14 | 600s | ip217-160-220-14.pbiaas.com | AS8560 | IONOS SE | 217.160.0.0/16 | 🇩🇪 Germany | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.56 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:247a:256:2c00::1 | 600s | hostworld.dk | AS8560 | IONOS SE | 2a02:2478:0:0:0:0:0:0/29 | 🇩🇪 Germany | — |
| TXT Record |
|---|
| v=spf1 +a +mx +ip4:217.160.220.14 +include:spf.protection.outlook.com include:spf.eu.exclaimer.net -all |
| Policy | Record (guldbosund.dk) |
|---|---|
| -all (hard fail) | v=spf1 +a +mx +ip4:217.160.220.14 +include:spf.protection.outlook.com include:spf.eu.exclaimer.net -all |
| Policy | Record (_dmarc.guldbosund.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@lignum.dk; ruf=mailto:dmarc@lignum.dk |
| www CNAME | guldbosund.dk (all on guldbosund.dk) |
| www vs bare domain | Same network guldbosund.dk: 217.160.220.14 2a02:247a:256:2c00::1 (AS8560) www.guldbosund.dk: 217.160.220.14 2a02:247a:256:2c00::1 (AS8560) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~2048 bit |
| selector1 | selector1-guldbosund-dk._domainkey.guldbosund.onmicrosoft.com | 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: 4/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.guldbosund.dk | XOlf4uxNw1B5FnP7UG4M0CyJNTIc2-1e8IGEogdhGx4 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026082500 |
| Primary NS (MNAME) | ns3.hostworld.dk |
| Responsible (RNAME) | service@lignum.dk |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2015-03-17 |
| Expires | 2027-03-31 (165d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 20:37:14 shown | 1014ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 05:23:14 | 998ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-20 18:53:41 | 1563ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-09 17:25:33 | 3173ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 19:53:33 | 1474ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-25 06:27:08 | 9929ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-18 01:11:34 | 1653ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-30 19:30:40 | 872ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 20:21:34 | 1016ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-19 22:37:33 | 4366ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 10:36:58 | 889ms | 2 NS 1 A 1 MX | 🔓 Insecure |