theca.dk

📜 Historical scan 2026-09-27 21:24:48 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

theca.dk is a .dk domain served by 4 nameservers (ns1.eurodns.com, ns2.eurodns.com, ns3.eurodns.com and 1 more). It was registered on 14 January 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.42.220 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by theca-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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

4 records 42ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.eurodns.com	199.167.66.107 2610:1c8:b002::107	ns1.eurodns.com ns1.eurodns.com	AS23393 NuCDN LLC AS23393 NuCDN LLC
ns2.eurodns.com	104.37.178.107 2610:1c8:b001::107	ns2.eurodns.com ns2.eurodns.com	AS23393 NuCDN LLC AS23393 NuCDN LLC
ns3.eurodns.com	199.167.66.108 2610:1c8:b002::108	ns3.eurodns.com ns3.eurodns.com	AS23393 NuCDN LLC AS23393 NuCDN LLC
ns4.eurodns.com	104.37.178.108 2610:1c8:b001::108	ns4.eurodns.com ns4.eurodns.com	AS23393 NuCDN LLC AS23393 NuCDN LLC

🌍 A Records#

1 records 36ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.42.220	3600s	vm1084.enterprisecloud.nu	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

1 records 43ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	theca-dk.mail.protection.outlook.com	2a01:111:f403:ca09::20 2a01:111:f403:ca09::26 2a01:111:f403:ca3c::6 2a01:111:f403:ca48::10 52.101.103.162 52.101.185.114 52.101.185.24 52.101.91.162	mail-as8pr05cu00400.inbound.protection.outlook.com mail-am8pr83cu00106.inbound.protection.outlook.com mail-zrxpr04cu00106.inbound.protection.outlook.com mail-miypr05cu00100.inbound.protection.outlook.com mail-miypr03cu00202.inbound.protection.outlook.com mail-zrxpr04cu00102.inbound.protection.outlook.com mail-zrxpr07cu00100.inbound.protection.outlook.com mail-matpr04cu00302.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

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 100ms

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

📝 TXT Records#

2 records 225ms

TXT Record
MS=ms67593927
v=spf1 ip4:84.15.96.34 ip4:5.103.31.68 ip4:82.135.132.55 ip4:82.135.132.56 ip4:82.135.132.57 ip4:82.135.132.58 ip4:82.135.132.59 ip4:82.135.132.60 ip4:88.119.254.42 ip4:89.47.161.82 ip4:88.119.154.41 ip4:185.21.42.220 ip4:82.135.132.61 ip4:79.98.28.46 ip4:168.245.49.28 include:spf.protection.outlook.com ~all

✉️ SPF#

Policy	Record (theca.dk)
~all (soft fail)	v=spf1 ip4:84.15.96.34 ip4:5.103.31.68 ip4:82.135.132.55 ip4:82.135.132.56 ip4:82.135.132.57 ip4:82.135.132.58 ip4:82.135.132.59 ip4:82.135.132.60 ip4:88.119.254.42 ip4:89.47.161.82 ip4:88.119.154.41 ip4:185.21.42.220 ip4:82.135.132.61 ip4:79.98.28.46 ip4:168.245.49.28 include:spf.protection.outlook.com ~all

📨 DMARC#

Policy	Record (_dmarc.theca.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:ruvqxyli@ag.eu.dmarcian.com, mailto:it@theca.dk; ruf=mailto:it@theca.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#

latest probe, not this scan · checked 2026-10-15 20:46:58

www CNAME	theca.dk (all on theca.dk) → 185.21.42.220 (AS48854)
www vs bare domain	Same network theca.dk: 185.21.42.220 (AS48854) www.theca.dk: 185.21.42.220 (AS48854)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-theca-dk._domainkey.actona.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#

107ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2024103026
Primary NS (MNAME)	ns1.eurodns.com
Responsible (RNAME)	hostmaster@eurodns.com
Refresh	43200s
Retry	7200s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-15 20:59:23

Field	Value
Registrar	Eurodns S.A
Registered	2006-01-14
Expires	2027-01-31 (98d)

🔗 Same registrant#

5 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
a-upholstery.dk	Eurodns S.A
actona.dk	Eurodns S.A
actonacompany.dk	Eurodns S.A
actonagroup.dk	Eurodns S.A
flexlux.dk	Eurodns S.A

📋 WHOIS#

⏱️ Lookup Timing#

42ms

36ms

43ms

AAAA

44ms

TXT

225ms

CAA

36ms

HTTPS

51ms

TLSA

1589ms

SOA

0ms

MTA-STS

66ms

DNSSEC

107ms

SRV

100ms

Total

2338ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-15 20:46:58	1164ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-14 19:12:21	1357ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-01 03:17:37	864ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-27 23:36:56	10102ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-27 21:24:48 shown	2338ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-25 20:47:47	1356ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-09 10:24:27	1095ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-29 00:16:26	1410ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-21 13:10:14	1961ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-20 12:44:41	9687ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-08 12:06:59	1544ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-01 06:19:54	9429ms	4 NS 1 A 1 MX	🔒 Secure
2026-07-17 00:16:29	10363ms	4 NS 1 A 1 MX	🔒 Secure
2026-07-03 13:55:11	1585ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-27 09:01:20	1115ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-24 14:00:23	1300ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-17 19:45:06	924ms	4 NS 1 A 1 MX	🔒 Secure