erf01.dk

📜 Historical scan 2026-06-19 14:03:48 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

erf01.dk is a .dk domain served by 4 nameservers (ns1-09.azure-dns.com, ns2-09.azure-dns.net, ns3-09.azure-dns.org and 1 more). It was registered on 6 March 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by .. The zone is not DNSSEC-signed, 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#

4 records 272ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1-09.azure-dns.com	13.107.236.9 2603:1061:0:700::9	ns1-09.azure-dns.com ns1-09.azure-dns.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns2-09.azure-dns.net	150.171.21.9 2620:1ec:8ec:700::9	ns2-09.azure-dns.net ns2-09.azure-dns.net	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns3-09.azure-dns.org	204.14.183.9 2a01:111:4000:700::9	ns3-09.azure-dns.org ns3-09.azure-dns.org	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
ns4-09.azure-dns.info	208.84.5.9 2620:1ec:bda:700::9	ns4-09.azure-dns.info ns4-09.azure-dns.info	AS8075 Microsoft Corporation AS8075 Microsoft Corporation

🌍 A Records#

🌍

No A records found

📧 MX Records#

1 records 170ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	. Null MX — domain accepts no email (RFC 7505)

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 630ms

TXT Record
v=spf1 -all

✉️ SPF#

Policy	Record (erf01.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC#

Policy	Record (_dmarc.erf01.dk)
p=reject	v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com,mailto:phishing@dnb.no

📬 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 2026-10-17 00:26:09

www	NXDOMAIN
www vs bare domain	Neither resolves erf01.dk: no address www.erf01.dk: no address
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

463ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

279ms

Field	Value
Serial	1
Primary NS (MNAME)	ns1-09.azure-dns.com
Responsible (RNAME)	azuredns-hostmaster@microsoft.com
Refresh	3600s
Retry	300s
Expire	2419200s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-18 18:30:56

Field	Value
Registrar	CSC Digital Brand Service, Inc
Registered	2017-03-06
Expires	2027-03-31 (159d)

🔗 Same registrant#

4 domains

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).

Domain	Registrar
autolease.dk	CSC Digital Brand Service, Inc
dnbfinans.dk	CSC Digital Brand Service, Inc
dnbidsolution.dk	CSC Digital Brand Service, Inc
idmee.dk	CSC Digital Brand Service, Inc

📋 WHOIS#

⏱️ Lookup Timing#

272ms

174ms

170ms

AAAA

296ms

TXT

630ms

CAA

290ms

HTTPS

167ms

TLSA

266ms

SOA

279ms

MTA-STS

297ms

DNSSEC

463ms

SRV

310ms

Total

2552ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-06-23 13:13:55	729ms	4 NS 0 A 1 MX	🔓 Insecure
2026-06-19 14:03:48 shown	2552ms	4 NS 0 A 1 MX	🔓 Insecure
2026-06-17 08:29:11	4650ms	4 NS 0 A 0 MX	🔓 Insecure
2026-06-17 08:09:45	959ms	4 NS 0 A 0 MX	🔓 Insecure
2026-06-17 08:07:25	325ms	4 NS 0 A 0 MX	🔓 Insecure
2026-06-17 08:00:31	401ms	4 NS 0 A 0 MX	🔓 Insecure