yubico.dk is a .dk domain served by 4 nameservers (ns-cloud-d1.googledomains.com, ns-cloud-d2.googledomains.com, ns-cloud-d3.googledomains.com and 1 more). It was registered on 27 April 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 35.190.17.235 is hosted by Google LLC (AS396982) in United States. Mail is handled by .. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 35.190.17.235 | 10800s | 235.17.190.35.bc.googleusercontent.com | AS396982 | Google LLC | 35.184.0.0/13 | 🇺🇸 United States | Kansas City |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 10800s | . Null MX — domain accepts no email (RFC 7505) | |||
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2600:1901:0:e733:: | 10800s | — | AS396982 | Google LLC | 2600:1900:0:0:0:0:0:0/31 | 🇺🇸 United States | Kansas City |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (yubico.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.yubico.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc-rua@yubico.com |
| Flags | Tag | Value |
|---|---|---|
| 0 | iodef | mailto:tlsadmin@yubico.com |
| 0 | issue | letsencrypt.org |
| 0 | issue | pki.goog |
| www | 35.190.17.235 2600:1901:0:e733:: (AS396982) (address records, no CNAME) |
| www vs bare domain | Same network yubico.dk: 35.190.17.235 2600:1901:0:e733:: (AS396982) www.yubico.dk: 35.190.17.235 2600:1901:0:e733:: (AS396982) |
| Wildcard | No |
DNS lookups: 0/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.yubico.dk | 5259a7cf-19db-4141-90f7-e1b5cb641565.16.authorize.certificatemanager.goog |
| 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 | 1 |
| Primary NS (MNAME) | ns-cloud-d1.googledomains.com |
| Responsible (RNAME) | cloud-dns-hostmaster@google.com |
| Refresh | 21600s |
| Retry | 3600s |
| Expire | 259200s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | MarkMonitor Inc. |
| Registered | 2017-04-27 |
| Expires | 2027-04-30 (190d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-24 06:25:46 | 9561ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-14 00:04:00 shown | 10078ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-28 03:43:29 | 2677ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-27 10:51:55 | 2415ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-18 00:26:37 | 923ms | 4 NS 1 A 0 MX | 🔓 Insecure |