ro-udvikling.dk is a .dk domain served by 2 nameservers (amir.ns.cloudflare.com, emely.ns.cloudflare.com). It was registered on 22 July 2026 (WHOIS) and first appeared in the .dk zone on 23 July 2026. Its website address 104.21.16.43 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by roudvikling-dk0e.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.16.43 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.166.26 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.154.152 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3035::6815:102b | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::ac43:a61a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.16.43,172.67.166.26 ech=AEX+DQBBEwAgACCLF15rNUUPnILOj8a0DYBd/P6V+36hty1nOPW6Q3YaRQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::6815:102b,2606:4700:3035::ac43:a61a |
| TXT Record |
|---|
| MS=ms82145773 |
| v=spf1 a mx include:spf.protection.outlook.com include:spf.postal.ro-udvikling.dk -all |
| Policy | Record (ro-udvikling.dk) |
|---|---|
| -all (hard fail) | v=spf1 a mx include:spf.protection.outlook.com include:spf.postal.ro-udvikling.dk -all |
| Policy | Record (_dmarc.ro-udvikling.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:8a2a015f076f4fa8a013bce332f0017b@dmarc-reports.cloudflare.net |
| www | 104.21.16.43 172.67.166.26 2606:4700:3035::6815:102b 2606:4700:3035::ac43:a61a (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network ro-udvikling.dk: 104.21.16.43 172.67.166.26 2606:4700:3035::6815:102b 2606:4700:3035::ac43:a61a (AS13335) www.ro-udvikling.dk: 104.21.16.43 172.67.166.26 2606:4700:3035::6815:102b 2606:4700:3035::ac43:a61a (AS13335) |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-roudvikling-dk0e._domainkey.roudvikling.y-v1.dkim.mail.microsoft | RSA · ~2048 bit |
| selector2 | selector2-roudvikling-dk0e._domainkey.roudvikling.y-v1.dkim.mail.microsoft | 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: 4/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2417536432 |
| Primary NS (MNAME) | amir.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | dns.services ApS |
| Registered | 2026-07-22 |
| Expires | 2027-07-21 (272d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 03:39:46 shown | 2918ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-03 10:20:00 | 1102ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-02 10:19:39 | 1117ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-30 13:56:55 | 879ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-28 04:06:22 | 875ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-22 03:57:58 | 1043ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-20 10:10:29 | 2578ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-13 08:12:28 | 2745ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-12 08:51:43 | 1899ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-16 16:24:33 | 5949ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-12 23:08:44 | 1814ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-11 13:44:25 | 1974ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-06 19:41:43 | 9297ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-24 09:21:48 | 2432ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-23 08:47:15 | 2205ms | 2 NS 0 A 0 MX | 🔒 Secure |