arenasyd.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 30 May 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 94.231.103.38 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by arenasyd-dk.mail.protection.outlook.com. 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.simply.com | — | — | — |
| ns2.simply.com | — | — | — |
| ns3.simply.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 94.231.103.38 | — | linux78.unoeuro.com | AS48854 | team.blue Denmark A/S | 94.231.96.0/20 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| v=spf1 include:spf.protection.outlook.com include:postfilter.dk include:spf.simply.com -all |
| Policy | Record (arenasyd.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com include:postfilter.dk include:spf.simply.com -all |
| Policy | Record (_dmarc.arenasyd.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; ruf=mailto:bgl@arenasyd.dk |
| www | 94.231.103.38 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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 |
|---|---|---|
| s1 | s1.domainkey.u1018819.wl070.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u1018819.wl070.sendgrid.net | 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: 3/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026043008 |
| 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 | 2005-05-30 |
| Expires | 2027-05-31 (220d) |
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 |
|---|---|
| detskerivamdrup.dk | CURANET A/S |
| kaaic.dk | Punktum dk A/S (direct) |
| vamdrupesport.dk | DANDOMAIN A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 12:52:14 | 498ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-04 01:15:29 | 914ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-03 01:15:00 | 917ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-29 20:34:34 | 938ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-16 09:52:56 | 1063ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-24 19:01:55 | 2610ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-23 11:54:01 | 4428ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-22 04:39:46 | 904ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 22:05:00 | 992ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-16 13:39:15 shown | 2734ms | 3 NS 1 A 1 MX | 🔓 Insecure |