niebuhr.dk

Records from scan: 2026-10-04 04:43:57 · 755ms total · last checked 2026-10-17 00:33 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

niebuhr.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 20 March 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.40.46.22 is hosted by Itm8 A/S (AS62319) in Denmark. Mail is handled by niebuhr-dk.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 our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 28ms

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 30ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.40.46.22	600s	co3web05-22.wehost.dk	AS62319	Itm8 A/S	185.40.44.0/22	🇩🇰 Denmark	Viby J

📧 MX Records#

1 records 52ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	600s	niebuhr-dk.mail.protection.outlook.com	2a01:111:f403:ca04::10 2a01:111:f403:ca21::8 2a01:111:f403:ca21::e 2a01:111:f403:ca48::a 52.101.103.162 52.101.209.31 52.101.73.123 52.101.73.145	mail-dbapr03cu00100.inbound.protection.outlook.com mail-matpr04cu00100.inbound.protection.outlook.com mail-matpr04cu00306.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-miypr03cu00202.inbound.protection.outlook.com mail-cpjpr05cu00207.inbound.protection.outlook.com mail-am6pr02cu00203.inbound.protection.outlook.com mail-am6pr02cu00301.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 → 52.98.149.152

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 58ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	1	100	1	5061sipfed.online.lync.com

📝 TXT Records#

4 records 151ms

TXT Record
_globalsign-domain-verification=BfdsZer5asQTqmRT6NWzmgteHoeKEfagjpHAxt0sig
5/qppG85HpfcPCXlBbzpS2X9RUC3KA+ORzDx7+oM+esly2HtL9egipppX1qoh6g5YLIfV4q1mAv/smOb0Ty5tw==
MS=ms37620566
v=spf1 a:mail.niebuhr.dk include:spf.protection.outlook.com include:_spf.wehost.dk ip4:193.106.122.55 -all

✉️ SPF#

Policy	Record (niebuhr.dk)
-all (hard fail)	v=spf1 a:mail.niebuhr.dk include:spf.protection.outlook.com include:_spf.wehost.dk ip4:193.106.122.55 -all

📨 DMARC#

Policy	Record (_dmarc.niebuhr.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:69aeb25b8e0de@dmarc-dk.centerasecurity.com;

📬 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#

checked 2026-10-10 16:52:02

www	185.40.46.22 (AS62319) (address records, no CNAME)
www vs bare domain	Same network niebuhr.dk: 185.40.46.22 (AS62319) www.niebuhr.dk: 185.40.46.22 (AS62319)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-niebuhr-dk._domainkey.niebuhr.onmicrosoft.com	RSA · ~2048 bit
selector2	selector2-niebuhr-dk._domainkey.niebuhr.onmicrosoft.com	RSA · ~1024 bit below 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: 3/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

55ms

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

🏷️ SOA#

40ms

Field	Value
Serial	2026100301
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 2026-10-04 05:15:13

Field	Value
Registrar	ONE.COM A/S
Registered	1997-03-20
Expires	2027-03-31 (165d)

📋 WHOIS#

⏱️ Lookup Timing#

28ms

30ms

52ms

AAAA

40ms

TXT

151ms

CAA

36ms

HTTPS

44ms

TLSA

303ms

SOA

40ms

MTA-STS

43ms

DNSSEC

55ms

SRV

58ms

Total

755ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 04:43:57 shown	755ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-04 14:37:57	928ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-26 12:56:33	969ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-06 16:01:22	1689ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-28 15:53:38	5394ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-03 14:29:49	1308ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-28 17:45:39	2103ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-25 16:07:06	2199ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-20 03:23:29	1004ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-19 09:53:19	5645ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-18 08:36:45	1248ms	2 NS 1 A 1 MX	🔒 Secure