madsensoptik.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 11 June 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 141.193.213.10 is hosted by Cloudflare London, LLC (AS209242) in United States. Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 141.193.213.10 | 3600s | — | AS209242 | Cloudflare London, LLC | 141.193.213.0/24 | 🇺🇸 United States | — |
| TXT Record |
|---|
| google-site-verification=ZK4pWvA4wI_4Lha1s5umZPA7ltI_8xQUZixAyIUbOno |
| protonmail-verification=ea39dd85a06193c503d2de5f73b0cdb207c66f2c |
| v=spf1 include:_spf.protonmail.ch include:spf.curanet.dk ~all |
| Policy | Record (madsensoptik.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch include:spf.curanet.dk ~all |
| Policy | Record (_dmarc.madsensoptik.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine |
| www | 141.193.213.10 (AS209242) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 5/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026101801 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | ONE.COM A/S |
| Registered | 2026-06-11 |
| Expires | 2027-06-10 (229d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-19 20:27:41 shown | 1023ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-30 21:01:29 | 1027ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-29 23:26:42 | 732ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-25 22:10:40 | 637ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-23 04:38:08 | 806ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-18 17:09:44 | 4657ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-17 21:50:10 | 2574ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-08 14:01:45 | 935ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-18 05:23:29 | 642ms | 2 NS 1 A 0 MX | 🔒 Secure |