colstrupco.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 10 May 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 198.202.211.1 is hosted by Cloudflare London, LLC (AS209242) in United States. Mail is handled by aspmx.l.google.com, smtp.google.com and 4 more. 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 | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 198.202.211.1 | — | — | AS209242 | Cloudflare London, LLC | 198.202.211.0/24 | 🇺🇸 United States | — |
| TXT Record |
|---|
| google-site-verification=xGnZQupNJHjnv4TTb9idL4T2hXBXi_G-kpB1Huv_6hQ |
| v=spf1 include:_spf.google.com ~all |
| v=spf1 include:spf.simply.com -all |
| Policy | Record (colstrupco.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.google.com ~all |
| -all (hard fail) | v=spf1 include:spf.simply.com -all |
| Policy | Record (_dmarc.colstrupco.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com; |
| www CNAME | cdn.webflow.com (all on webflow.com) |
| www vs bare domain | Same network colstrupco.dk: 198.202.211.1 (AS209242) www.colstrupco.dk: 198.202.211.1 2620:cb:2000::1 (AS13335 AS209242) |
| 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 |
|---|---|---|
| — | 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: 1/10 · policy: ~all
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026031002 |
| 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 | 2024-05-10 |
| Expires | 2028-05-09 (567d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 18:08:36 | 2046ms | 3 NS 1 A 6 MX | 🔒 Secure |
| 2026-10-01 05:51:59 | 2388ms | 3 NS 1 A 6 MX | 🔒 Secure |
| 2026-09-24 18:10:58 | 1546ms | 3 NS 1 A 6 MX | 🔒 Secure |
| 2026-08-25 16:04:07 | 1592ms | 3 NS 1 A 6 MX | 🔒 Secure |
| 2026-07-02 09:37:09 | 3202ms | 3 NS 1 A 6 MX | 🔒 Secure |
| 2026-06-25 16:07:00 | 1760ms | 3 NS 1 A 6 MX | 🔒 Secure |
| 2026-06-22 07:48:20 | 1174ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 20:16:38 | 5024ms | 3 NS 1 A 6 MX | 🔒 Secure |
| 2026-06-16 21:50:19 shown | 838ms | 3 NS 1 A 6 MX | 🔒 Secure |