booomerang.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 2 February 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 164.92.237.194 is hosted by DigitalOcean, LLC (AS14061) in Germany. Mail is handled by smtp.google.com. 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 |
|---|---|---|---|---|---|---|---|
| 164.92.237.194 | — | booomerang.dev | AS14061 | DigitalOcean, LLC | 164.92.128.0/17 | 🇩🇪 Germany | Frankfurt am Main |
| www | 164.92.237.194 (AS14061) (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.u33345896.wl147.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u33345896.wl147.sendgrid.net | 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.
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2023091904 |
| 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 | Punktum dk A/S (direct) |
| Registered | 2011-02-02 |
| Expires | 2027-02-28 (125d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 15:31:09 | 1226ms | 3 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-10 12:16:10 | 1058ms | 3 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-09 11:44:29 | 1068ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-08 10:36:03 | 571ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 14:58:15 | 905ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-29 14:48:43 | 1286ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 09:47:35 | 697ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 16:16:38 shown | 1694ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 16:16:06 | 2463ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 16:01:28 | 445ms | 3 NS 1 A 1 MX | ⚠️ Bogus |
| 2026-06-16 16:00:51 | 717ms | 3 NS 1 A 1 MX | 🔒 Secure |