by-ro.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 19 October 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 136.243.123.133 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by byro-dk0e.mail.protection.outlook.com. 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 |
|---|---|---|---|
| ns01.one.com | — | — | — |
| ns02.one.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 136.243.123.133 | — | dedi5059.your-server.de | AS24940 | Hetzner Online GmbH | 136.243.0.0/16 | 🇩🇪 Germany | Nuremberg |
| TXT Record |
|---|
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (by-ro.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.by-ro.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 136.243.123.133 (AS24940) (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 |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-byro-dk0e._domainkey.byrografiskstudie.onmicrosoft.com | 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
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 | 2026061405 |
| 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 | 2021-10-19 |
| Expires | 2026-10-18 (expired) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-14 03:33:11 | 1340ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-13 00:56:55 | 960ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-01 08:46:42 | 1200ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-28 07:24:45 | 1092ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-26 06:44:14 | 905ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-31 12:42:57 | 1535ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-17 01:43:23 | 5241ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-14 09:57:28 | 1617ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-04 06:57:44 | 2569ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-30 23:09:34 | 720ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 18:17:39 | 5774ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 18:09:20 | 2390ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 18:03:35 | 1761ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 18:00:29 shown | 2634ms | 2 NS 1 A 1 MX | 🔒 Secure |