by-ro.dk

📜 Historical scan 2026-08-17 01:43:23 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

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.

🖥️ Nameservers#

2 records 46ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 41ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
136.243.123.133	3600s	dedi5059.your-server.de	AS24940	Hetzner Online GmbH	136.243.0.0/16	🇩🇪 Germany	Nuremberg

📧 MX Records#

1 records 44ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	byro-dk0e.mail.protection.outlook.com	2a01:111:f403:ca09::20 2a01:111:f403:ca09::3 2a01:111:f403:ca09::6 2a01:111:f403:ca09::c 52.101.68.15 52.101.68.18 52.101.68.32 52.101.73.1	mail-as8pr05cu00400.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-db3pr0202cu00200.inbound.protection.outlook.com mail-am3pr04cu00501.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.56

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 170ms

TXT Record
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (by-ro.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.by-ro.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-14 03:33:11

www	136.243.123.133 (AS24940) (address records, no CNAME)
www vs bare domain	Same network by-ro.dk: 136.243.123.133 (AS24940) www.by-ro.dk: 136.243.123.133 (AS24940)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

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.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

86ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

62ms

Field	Value
Serial	2026081305
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-01 08:52:43

Field	Value
Registrar	ONE.COM A/S
Registered	2021-10-19
Expires	2026-10-18 (expired)

📋 WHOIS#

⏱️ Lookup Timing#

46ms

41ms

44ms

AAAA

55ms

TXT

170ms

CAA

53ms

HTTPS

45ms

TLSA

369ms

SOA

62ms

MTA-STS

64ms

DNSSEC

86ms

SRV

117ms

Total

5241ms

🕐 Scan History#

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 shown	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	2634ms	2 NS 1 A 1 MX	🔒 Secure