klarstrup.dk is a .dk domain served by 2 nameservers (ns1.vercel-dns.com, ns2.vercel-dns.com). It was registered on 21 March 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 216.198.79.1 is hosted by Amazon.com, Inc. (AS16509) in United States. Mail is handled by mx1.improvmx.com, mx2.improvmx.com. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 216.198.79.1 | 1800s | — | AS16509 | Amazon.com, Inc. | 216.198.79.0/24 | 🇺🇸 United States | — |
| 216.198.79.65 | 1800s | — | AS16509 | Amazon.com, Inc. | 216.198.79.0/24 | 🇺🇸 United States | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 64.29.17.1 |
| 🔶 Autoconfig | 64.29.17.1 |
| TXT Record |
|---|
| v=spf1 include:spf.improvmx.com ~all |
| Policy | Record (klarstrup.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.improvmx.com ~all |
| Policy | Record (_dmarc.klarstrup.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| Flags | Tag | Value |
|---|---|---|
| 0 | issue | letsencrypt.org |
| 0 | issue | pki.goog |
| 0 | issue | sectigo.com |
| www | 216.198.79.1 64.29.17.65 (AS16509) (address records, no CNAME) |
| www vs bare domain | Same network klarstrup.dk: 216.198.79.1 64.29.17.65 (AS16509) www.klarstrup.dk: 216.198.79.1 64.29.17.65 (AS16509) |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 1/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 1683480671 |
| Primary NS (MNAME) | ns1.vercel-dns.com |
| Responsible (RNAME) | hostmaster@nsone.net |
| Refresh | 43200s |
| Retry | 7200s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2015-03-21 |
| Expires | 2027-03-31 (159d) |
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 |
|---|---|
| derp.dk | Punktum dk A/S (direct) |
| exelerate.dk | Punktum dk A/S (direct) |
| uptrans.dk | DANDOMAIN A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 04:00:17 shown | 1142ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-15 03:15:01 | 1091ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-09 04:55:49 | 1049ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-17 11:57:01 | 1246ms | 2 NS 2 A 2 MX | 🔓 Insecure |