heilbut.dk is a .dk domain served by 2 nameservers (primary.infoserv.dk, secondary.infoserv.dk). It was registered on 25 October 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 172.104.135.111 is hosted by Akamai Connected Cloud (AS63949) in Germany. Mail is handled by mail.ishost.dk. The zone is not DNSSEC-signed, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 172.104.135.111 | — | li1651-111.members.linode.com | AS63949 | Akamai Connected Cloud | 172.104.128.0/18 | 🇩🇪 Germany | Frankfurt am Main |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mail.ishost.dk | 139.162.148.133 | mail.ishost.dk | AS63949 Akamai Connected Cloud |
| TXT Record |
|---|
| v=spf1 mx a:mail.ishost.dk a:mail3.ishost.dk -all |
| Policy | Record (heilbut.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx a:mail.ishost.dk a:mail3.ishost.dk -all |
| Policy | Record (_dmarc.heilbut.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| www | 172.104.135.111 (AS63949) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~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: 3/10 · policy: -all
No problems found| 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 | 202503138 |
| Primary NS (MNAME) | primary.infoserv.dk |
| Responsible (RNAME) | admin@infoserv |
| Refresh | 900s |
| Retry | 300s |
| Expire | 3600s |
| Minimum (neg-cache TTL) | 900s |
| Field | Value |
|---|---|
| Registrar | WEBBUREAUET INFOSERV ApS |
| Registered | 2006-10-25 |
| Expires | 2026-10-31 (8d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-21 05:12:48 | 1882ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 11:23:40 | 3340ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 11:15:14 shown | 1078ms | 2 NS 1 A 1 MX | 🔓 Insecure |