byhornsleth.dk is a .dk domain served by 3 nameservers (ns1.e-studio.dk, ns2.e-studio.dk, ns3.e-studio.dk). It was registered on 11 July 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.223.235.80 is hosted by DLX A/S (AS47527) in Denmark. Mail is handled by mx1.spamfri.dk, mx2.spamfri.dk. 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 |
|---|---|---|---|---|---|---|---|
| 91.223.235.80 | 14400s | imali.pil.dk | AS47527 | DLX A/S | 91.223.235.0/24 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 14400s | mx1.spamfri.dk | 195.242.131.16 2001:67c:564:fffd::1001 |
mx1.spamfri.dk mx1.spamfri.dk |
AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS |
| 20 | 14400s | mx2.spamfri.dk | 193.200.91.109 2001:67c:564:fffd::2001 |
mx2.spamfri.dk mx2.spamfri.dk |
AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS |
| TXT Record |
|---|
| klaviyo-site-verification=QWu7x2 |
| v=spf1 include:_spf.e-studio.dk include:send.heysender.com include:spf.shoporama.dk -all |
| Policy | Record (byhornsleth.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.e-studio.dk include:send.heysender.com include:spf.shoporama.dk -all |
| Policy | Record (_dmarc.byhornsleth.dk) |
|---|---|
| p=quarantine | v=DMARC1;p=quarantine;sp=none;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400 |
| www CNAME | byhornsleth.dk (all on byhornsleth.dk) → 91.223.235.80 (AS47527) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 7 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| 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: 5/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.byhornsleth.dk | pPE7o-OuyxXr0bbyUKElEgQyxrb_gnf-tFjdeM7vm9Y |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.spamfri.dk | DANE-EE · SPKI · SHA-256 | 884451547A03D0AC2F628D943839BAA6… |
| SMTP _25._tcp.mx2.spamfri.dk | DANE-EE · SPKI · SHA-256 | 6598C93F79B95376BB8099E9AC862167… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026081803 |
| Primary NS (MNAME) | ns1.e-studio.dk |
| Responsible (RNAME) | hostmaster@mailrelay.e-studio.dk |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2016-07-11 |
| Expires | 2027-07-31 (285d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-27 22:57:23 shown | 487ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-08 16:03:41 | 563ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-26 12:22:54 | 716ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-18 23:14:31 | 6881ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-04 23:21:48 | 1586ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-28 02:50:34 | 2177ms | 3 NS 0 A 2 MX | ⚠️ Bogus |
| 2026-06-23 19:29:13 | 888ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-19 10:34:35 | 1490ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-16 18:26:19 | 642ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-16 18:20:22 | 930ms | 3 NS 1 A 2 MX | 🔒 Secure |