arc-group.dk

📜 Historical scan 2026-08-28 05:38:17 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

arc-group.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 2 December 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.30.213.30 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by arcgroup-dk0i.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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 42ms

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 35ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
46.30.213.30	3600s	webcluster1.webpod12-cph3.one.com	AS51468	One.com A/S	46.30.208.0/21	🇩🇰 Denmark	Copenhagen

📧 MX Records#

1 records 50ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	arcgroup-dk0i.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::1 2a01:111:f403:ca09::8 2a01:111:f403:ca09::f 52.101.103.137 52.101.209.153 52.101.73.16 52.101.73.26	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db7pr03cu00401.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-am7pr05cu00307.inbound.protection.outlook.com mail-miypr02cu00101.inbound.protection.outlook.com mail-cpjpr04cu00101.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-as9pr05cu01302.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 → 40.104.116.8

🔷 AAAA Records (IPv6)#

1 records 39ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a02:2350:5:10a:f7:cf03:2ca3:2e53	3600s	—	AS51468	One.com A/S	2a02:2350:0:0:0:0:0:0/32	🇩🇰 Denmark	Copenhagen

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 206ms

TXT Record
MS=ms27116270
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

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

📨 DMARC#

Policy	Record (_dmarc.arc-group.dk)
p=reject	v=DMARC1; p=reject; sp=reject; rua=mailto:it@arc-group.dk; ruf=mailto:it@arc-group.dk; pct=100; fo=1;

📬 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 2026-10-12 06:00:26

www	46.30.213.30 2a02:2350:5:10a:f7:cf03:2ca3:2e53 (AS51468) (address records, no CNAME)
www vs bare domain	Same network arc-group.dk: 46.30.213.30 2a02:2350:5:10a:f7:cf03:2ca3:2e53 (AS51468) www.arc-group.dk: 46.30.213.30 2a02:2350:5:10a:f7:cf03:2ca3:2e53 (AS51468)
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-arcgroup-dk0i._domainkey.arcgroupdk.d-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.

🔎 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#

91ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026082404
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 2026-10-17 13:41:35

Field	Value
Registrar	ONE.COM A/S
Registered	2021-12-02
Expires	2026-12-01 (44d)

🔗 Same registrant#

0 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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

42ms

35ms

50ms

AAAA

39ms

TXT

206ms

CAA

42ms

HTTPS

22ms

TLSA

183ms

SOA

0ms

MTA-STS

67ms

DNSSEC

91ms

SRV

64ms

Total

856ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 15:08:50	1044ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-30 11:52:15	1340ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-19 21:54:00	1860ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-28 05:38:17 shown	856ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-25 17:40:56	1682ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-24 17:15:10	24591ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-20 05:42:41	9395ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-29 09:39:11	5964ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-20 12:30:51	1268ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-03 16:16:51	1293ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-27 13:54:39	1291ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-21 21:58:07	1131ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 13:38:35	875ms	2 NS 1 A 1 MX	🔒 Secure