arenasyd.dk

Records from scan: 2026-10-08 12:52:14 · 498ms total · last checked 2026-10-16 04:45 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

arenasyd.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 30 May 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 94.231.103.38 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by arenasyd-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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#

3 records 29ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 30ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
94.231.103.38	3600s	linux78.unoeuro.com	AS48854	team.blue Denmark A/S	94.231.96.0/20	🇩🇰 Denmark	—

📧 MX Records#

1 records 28ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	arenasyd-dk.mail.protection.outlook.com	2a01:111:f403:ca09::28 2a01:111:f403:ca21::a 2a01:111:f403:ca3c::8 2a01:111:f403:ca48::c 52.101.103.137 52.101.103.140 52.101.73.155 52.101.91.159	mail-am6pr02cu00300.inbound.protection.outlook.com mail-maspr04cu00102.inbound.protection.outlook.com mail-zrxpr05cu00100.inbound.protection.outlook.com mail-miypr03cu00104.inbound.protection.outlook.com mail-miypr02cu00101.inbound.protection.outlook.com mail-miypr02cu00204.inbound.protection.outlook.com mail-am7pr02cu00203.inbound.protection.outlook.com mail-matpr04cu00207.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 → 52.98.149.136
🔶 Autoconfig	autoconfig-mf.onlinemail.io → 185.21.40.62

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 67ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	maildiscover.simply.com

📝 TXT Records#

1 records 142ms

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

✉️ SPF#

Policy	Record (arenasyd.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:postfilter.dk include:spf.simply.com -all

📨 DMARC#

Policy	Record (_dmarc.arenasyd.dk)
p=quarantine	v=DMARC1; p=quarantine; ruf=mailto:bgl@arenasyd.dk

📬 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 2026-10-08 12:52:14

www	94.231.103.38 (AS48854) (address records, no CNAME)
www vs bare domain	Same network arenasyd.dk: 94.231.103.38 (AS48854) www.arenasyd.dk: 94.231.103.38 (AS48854)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
s1	s1.domainkey.u1018819.wl070.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u1018819.wl070.sendgrid.net	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#

69ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✓ Found
Flags	unsigned answer

🏷️ SOA#

41ms

Field	Value
Serial	2026100300
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-04 01:26:50

Field	Value
Registrar	Simply.com A/S
Registered	2005-05-30
Expires	2027-05-31 (226d)

📋 WHOIS#

⏱️ Lookup Timing#

29ms

30ms

28ms

AAAA

31ms

TXT

142ms

CAA

28ms

HTTPS

28ms

TLSA

65ms

SOA

41ms

MTA-STS

35ms

DNSSEC

69ms

SRV

67ms

Total

498ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-08 12:52:14 shown	498ms	3 NS 1 A 1 MX	🔓 Insecure
2026-10-04 01:15:29	914ms	3 NS 1 A 1 MX	🔓 Insecure
2026-10-03 01:15:00	917ms	3 NS 1 A 1 MX	🔓 Insecure
2026-09-29 20:34:34	938ms	3 NS 1 A 1 MX	🔓 Insecure
2026-09-16 09:52:56	1063ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-24 19:01:55	2610ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-23 11:54:01	4428ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-22 04:39:46	904ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 22:05:00	992ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-16 13:39:15	2734ms	3 NS 1 A 1 MX	🔓 Insecure