eftersyn.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 24 August 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.183.138.100 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by mail.eftersyn.dk. The zone is DNSSEC-signed and validates, has no 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.simply.com | — | — | — |
| ns2.simply.com | — | — | — |
| ns3.simply.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 46.183.138.100 | — | — | AS47292 | Sentia Denmark A/S | 46.183.138.0/23 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mail.eftersyn.dk | 142.132.143.218 | cp13.nordicway.dk | AS24940 Hetzner Online GmbH |
| TXT Record |
|---|
| v=spf1 ip4:142.132.143.218 -all |
| v=spf1 mx include:spf.gigahost.dk -all |
| Policy | Record (eftersyn.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:142.132.143.218 -all |
| -all (hard fail) | v=spf1 mx include:spf.gigahost.dk -all |
| www | 142.132.143.218 (AS24940) (address records, no CNAME) |
| 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 |
|---|---|---|
| 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: 0/10 · policy: -all
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026050401 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Domeneshop AS |
| Registered | 2018-08-24 |
| Expires | 2027-08-31 (307d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 20:47:46 | 319ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-09 14:47:41 | 509ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-03 11:20:33 | 427ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 11:19:53 | 331ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 03:24:06 | 429ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-05 14:23:57 | 397ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 21:38:58 | 682ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-25 18:18:26 | 504ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-08 22:03:44 | 827ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 06:05:24 shown | 577ms | 3 NS 1 A 1 MX | 🔒 Secure |