roots4.dk is a .dk domain served by 2 nameservers (lewis.ns.cloudflare.com, noor.ns.cloudflare.com). It was registered on 10 February 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.26.137 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.26.137 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.168.74 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx1.onlinemail.io | 185.21.42.12 | mx1.onlinemail.io | AS48854 team.blue Denmark A/S |
| 20 | 300s | mx2.onlinemail.io | 46.36.208.16 | mx2.onlinemail.io | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover-mf.onlinemail.io → 185.21.40.62 |
| 🔶 Autoconfig | autoconfig-mf.onlinemail.io → 185.21.40.62 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a06:98c1:3120::1 | 300s | — | AS13335 | Cloudflare, Inc. | 2a06:98c1:3120:0:0:0:0:0/46 | — | — |
| 2a06:98c1:3121::1 | 300s | — | AS13335 | Cloudflare, Inc. | 2a06:98c1:3120:0:0:0:0:0/46 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=188.114.96.1,188.114.97.1 ech=AEX+DQBBoQAgACDnocAmMJrNbx2g+6T1UqeIJvWl/Zi2sNZ6SqX7p2HyWgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2a06:98c1:3120::1,2a06:98c1:3121::1 |
| TXT Record |
|---|
| v=spf1 include:spf.onlinemail.io include:_custspf.one.com ~all |
| Policy | Record (roots4.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.onlinemail.io include:_custspf.one.com ~all |
| Policy | Record (_dmarc.roots4.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| www | 104.21.26.137 172.67.168.74 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network roots4.dk: 104.21.26.137 172.67.168.74 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) www.roots4.dk: 104.21.26.137 172.67.168.74 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 4/10 · 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 | 2417541580 |
| Primary NS (MNAME) | lewis.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | CURANET A/S |
| Registered | 2017-02-10 |
| Expires | 2027-02-28 (125d) |
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 |
|---|---|---|---|
| 2026-10-15 22:20:00 shown | 4323ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-24 05:23:59 | 751ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-22 23:31:08 | 756ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-07-26 10:53:53 | 8933ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-07-01 13:13:08 | 1009ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-27 11:32:09 | 1932ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-18 04:55:57 | 969ms | 2 NS 2 A 2 MX | 🔓 Insecure |