bykort.dk is a .dk domain served by 2 nameservers (ns1.yayhosting.dk, ns2.yayhosting.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.242.130.56 is hosted by Christian Ebsen ApS (AS62121) in Denmark. Mail is handled by mx1.spamfri.dk, mx2.spamfri.dk and 1 more. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.yayhosting.dk | — | — | — |
| ns2.yayhosting.dk | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 195.242.130.56 | — | whm03.yayhosting.dk | AS62121 | Christian Ebsen ApS | 195.242.130.0/23 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mx1.spamfri.dk | 195.242.131.16 | mx1.spamfri.dk | AS62121 Christian Ebsen ApS |
| 20 | — | mx2.spamfri.dk | 193.200.91.109 | mx2.spamfri.dk | AS62121 Christian Ebsen ApS |
| 30 | — | mx3.spamfri.dk | 62.69.152.43 62.69.152.43 |
43.34-46.152.69.62.in-addr.arpa mx3.spamfri.dk |
AS47527 DLX A/S AS47527 DLX A/S |
| TXT Record |
|---|
| v=spf1 ip4:195.242.130.56 include:_spf.yayhosting.dk -all |
| Policy | Record (bykort.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:195.242.130.56 include:_spf.yayhosting.dk -all |
| Policy | Record (_dmarc.bykort.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www CNAME | bykort.dk (all on bykort.dk) |
| 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: 1/10 · policy: -all
No problems found| 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… |
| SMTP _25._tcp.mx3.spamfri.dk | DANE-EE · SPKI · SHA-256 | BBFB0694919290E5BC9D6E2C6F47D846… |
| 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 | 2026060701 |
| Primary NS (MNAME) | ns1.yayhosting.dk |
| Responsible (RNAME) | hostmaster@mailrelay.e-studio.dk |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 05:07:02 | 1423ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-09-30 00:05:12 | 688ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-09-05 23:49:16 | 572ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-09-02 09:22:59 | 635ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-08-28 01:36:34 | 646ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-08-25 22:33:22 | 754ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-08-09 13:18:27 | 3965ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-23 23:11:42 | 658ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-16 18:23:00 | 537ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-16 18:20:29 shown | 647ms | 2 NS 1 A 3 MX | 🔓 Insecure |