tre-ing.dk

📜 Historical scan 2026-10-02 10:28:17 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

tre-ing.dk is a .dk domain served by 2 nameservers (jocelyn.ns.cloudflare.com, kayden.ns.cloudflare.com). It was registered on 16 March 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.28.223 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by treing-dk0i.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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 39ms

Nameserver	IP addresses	PTR	ASN / ISP
jocelyn.ns.cloudflare.com	108.162.192.174 172.64.32.174 173.245.58.174 2606:4700:50::adf5:3aae 2803:f800:50::6ca2:c0ae 2a06:98c1:50::ac40:20ae	jocelyn.ns.cloudflare.com jocelyn.ns.cloudflare.com jocelyn.ns.cloudflare.com jocelyn.ns.cloudflare.com jocelyn.ns.cloudflare.com jocelyn.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
kayden.ns.cloudflare.com	108.162.195.74 162.159.44.74 172.64.35.74 2606:4700:58::a29f:2c4a 2803:f800:50::6ca2:c34a 2a06:98c1:50::ac40:234a	kayden.ns.cloudflare.com kayden.ns.cloudflare.com kayden.ns.cloudflare.com kayden.ns.cloudflare.com kayden.ns.cloudflare.com kayden.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 40ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.28.223	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.147.189	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 35ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	treing-dk0i.mail.protection.outlook.com	2a01:111:f403:c967::c 2a01:111:f403:ca04::a 2a01:111:f403:ca38::8 2a01:111:f403:ca48::a 52.101.209.28 52.101.68.15 52.101.68.21 52.101.73.126	mail-cpjpr05cu00204.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-wa4pr04cu00100.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-cpjpr05cu00104.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db4pr02cu00205.inbound.protection.outlook.com mail-am8pr83cu00106.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 → 40.104.116.24
🔶 Autoconfig	94.231.109.93

🔷 AAAA Records (IPv6)#

2 records 43ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::ac43:93bd	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3032::6815:1cdf	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 46ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.28.223,172.67.147.189 ech=AEX+DQBB/AAgACBpBkJcnPfGknMoBOPEoOI5hVbW5T9pXET7lGEHrG0PcQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:93bd,2606:4700:3032::6815:1cdf

🔌 SRV Records#

1 records 71ms

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

📝 TXT Records#

2 records 187ms

TXT Record
google-site-verification=stU5tpe7rQKcEDt0Zwgb455i7puPDndsfJ2vAvApaQ4
v=spf1 include:spf.curanet.dk include:spf.protection.outlook.com ~all

✉️ SPF#

Policy	Record (tre-ing.dk)
~all (soft fail)	v=spf1 include:spf.curanet.dk include:spf.protection.outlook.com ~all

📨 DMARC#

Policy	Record (_dmarc.tre-ing.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:dmarc@tre-ing.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 2026-10-07 19:08:13

www	104.21.28.223 172.67.147.189 2606:4700:3030::ac43:93bd 2606:4700:3032::6815:1cdf (AS13335) (address records, no CNAME)
www vs bare domain	Same network tre-ing.dk: 104.21.28.223 172.67.147.189 2606:4700:3030::ac43:93bd 2606:4700:3032::6815:1cdf (AS13335) www.tre-ing.dk: 104.21.28.223 172.67.147.189 2606:4700:3030::ac43:93bd 2606:4700:3032::6815:1cdf (AS13335)
Wildcard	Yes: any name under the zone resolves

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-treing-dk0i._domainkey.treing.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: 4/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

82ms

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

🏷️ SOA#

48ms

Field	Value
Serial	2415131584
Primary NS (MNAME)	jocelyn.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-13 12:49:21

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2021-03-16
Expires	2027-03-31 (162d)

🔗 Same registrant#

2 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
tre3.dk	Punktum dk A/S (direct)
treing.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

39ms

40ms

35ms

AAAA

43ms

TXT

187ms

CAA

47ms

HTTPS

46ms

TLSA

599ms

SOA

48ms

MTA-STS

48ms

DNSSEC

82ms

SRV

71ms

Total

1092ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-07 19:08:13	1180ms	2 NS 2 A 1 MX	🔓 Insecure
2026-10-02 10:28:17 shown	1092ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-29 17:53:19	824ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-20 04:16:28	9833ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-24 22:59:55	1352ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-23 20:46:24	4652ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-20 17:49:06	1796ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-21 10:41:11	1131ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-17 11:52:09	2181ms	2 NS 2 A 1 MX	🔓 Insecure