trefo.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.163.97.44 is hosted by Fynske Medier P/S (AS43167) in Denmark. Mail is handled by trefo-dk.mail.protection.outlook.com. 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 |
|---|---|---|---|---|---|---|---|
| 193.163.97.44 | 3600s | — | AS43167 | Fynske Medier P/S | 193.163.96.0/23 | 🇩🇰 Denmark | Tønder |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | trefo-dk.mail.protection.outlook.com | — | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.40 |
| TXT Record |
|---|
| MS=ms64581930 |
| v=spf1 include:spf.protection.outlook.com ip4:193.163.96.23 ip4:193.163.97.21 ip4:193.163.97.22 -all |
| Policy | Record (trefo.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com ip4:193.163.96.23 ip4:193.163.97.21 ip4:193.163.97.22 -all |
| Policy | Record (_dmarc.trefo.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:66f14a574745c@dmarc-dk.centerasecurity.com |
| www CNAME | trefo.dk (all on trefo.dk) → 193.163.97.44 (AS43167) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-trefo-dk._domainkey.jfmedier.onmicrosoft.com | RSA · ~1024 bit below 2048 bit |
| selector2 | selector2-trefo-dk._domainkey.jfmedier.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: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026101200 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 15:38:08 shown | 1391ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-09 05:40:29 | 967ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 02:30:29 | 1255ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 02:09:11 | 568ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 22:42:00 | 765ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-16 19:51:07 | 831ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 00:37:08 | 1128ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 04:18:46 | 1209ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 12:13:22 | 1181ms | 4 NS 1 A 1 MX | 🔒 Secure |