cossynthesis.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 1 February 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by cossynthesis-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 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 | — | — | — |
| TXT Record |
|---|
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (cossynthesis.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.cossynthesis.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:tjmpklk7@ag.eu.dmarcian.com; |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves cossynthesis.dk: no address www.cossynthesis.dk: no address |
| 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-cossynthesis-dk._domainkey.cosynthesis.onmicrosoft.com | RSA · ~1024 bit below 2048 bit |
| selector2 | selector2-cossynthesis-dk._domainkey.cosynthesis.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 | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2025031404 |
| 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 | Simply.com A/S |
| Registered | 2018-02-01 |
| Expires | 2027-02-28 (125d) |
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).
| Domain | Registrar |
|---|---|
| alarm-cos.dk | Simply.com A/S |
| chrolesensynthesis.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 06:39:43 | 1724ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-02 10:44:09 | 919ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-27 01:00:23 | 810ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-26 13:06:13 | 1648ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-23 14:27:52 | 1095ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-22 00:33:59 | 746ms | 3 NS 0 A 1 MX | ⚠️ Bogus |
| 2026-06-16 22:54:28 | 1840ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-16 22:30:26 shown | 3771ms | 3 NS 0 A 1 MX | 🔒 Secure |