ceng.dk

📜 Historical scan 2026-06-26 19:18:52 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

ceng.dk is a .dk domain served by 2 nameservers (brianna.ns.cloudflare.com, garret.ns.cloudflare.com). It was registered on 13 July 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.90.159 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by ceng-dk.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 237ms

Nameserver	IP addresses	PTR	ASN / ISP
brianna.ns.cloudflare.com	108.162.192.245 172.64.32.245 173.245.58.245 2606:4700:50::adf5:3af5 2803:f800:50::6ca2:c0f5 2a06:98c1:50::ac40:20f5	brianna.ns.cloudflare.com brianna.ns.cloudflare.com brianna.ns.cloudflare.com brianna.ns.cloudflare.com brianna.ns.cloudflare.com brianna.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
garret.ns.cloudflare.com	108.162.195.246 162.159.44.246 172.64.35.246 2606:4700:58::a29f:2cf6 2803:f800:50::6ca2:c3f6 2a06:98c1:50::ac40:23f6	garret.ns.cloudflare.com garret.ns.cloudflare.com garret.ns.cloudflare.com garret.ns.cloudflare.com garret.ns.cloudflare.com garret.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 214ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.90.159	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.202.112	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 223ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	ceng-dk.mail.protection.outlook.com	52.101.68.10 52.101.68.16 52.101.68.8 52.101.73.6	mail-dbbpr03cu00102.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-du0pr03cu00100.inbound.protection.outlook.com mail-am6pr04cu00306.inbound.protection.outlook.com	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
🔶 Autoconfig	172.67.202.112

🔷 AAAA Records (IPv6)#

2 records 231ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3035::ac43:ca70	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::6815:5a9f	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 216ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.90.159,172.67.202.112 ech=AEX+DQBB2QAgACDiKYRRbyyQZXSjOafj3kW22RcArRw4lNzsPqakaULYGgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::ac43:ca70,2606:4700:3036::6815:5a9f

🔌 SRV Records#

1 records 413ms

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

📝 TXT Records#

2 records 463ms

TXT Record
google-site-verification=zJK7hKFL90UJySfnNYC8stfY7k20SXA5cRVWd-iilmg
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

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

📨 DMARC#

Policy	Record (_dmarc.ceng.dk)
p=quarantine	v=DMARC1; p=quarantine; pct=100; rua=mailto:jrb@ceng.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 2026-10-18 10:19:41

www	104.21.90.159 172.67.202.112 2606:4700:3031::6815:5a9f 2606:4700:3037::ac43:ca70 (AS13335) (address records, no CNAME)
www vs bare domain	Same network ceng.dk: 104.21.90.159 172.67.202.112 2606:4700:3031::6815:5a9f 2606:4700:3037::ac43:ca70 (AS13335) www.ceng.dk: 104.21.90.159 172.67.202.112 2606:4700:3031::6815:5a9f 2606:4700:3037::ac43:ca70 (AS13335)
Wildcard	Yes: any name under the zone resolves

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-ceng-dk._domainkey.ceng.onmicrosoft.com	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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

409ms

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

🏷️ SOA#

222ms

Field	Value
Serial	2407220063
Primary NS (MNAME)	brianna.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-08 02:07:46

Field	Value
Registrar	Eurodns S.A
Registered	2017-07-13
Expires	2027-07-31 (285d)

📋 WHOIS#

⏱️ Lookup Timing#

237ms

214ms

223ms

AAAA

231ms

TXT

463ms

CAA

221ms

HTTPS

216ms

TLSA

542ms

SOA

222ms

MTA-STS

247ms

DNSSEC

409ms

SRV

413ms

Total

2408ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-18 10:19:41	3371ms	2 NS 2 A 1 MX	🔓 Insecure
2026-10-08 00:35:25	1151ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-24 03:38:12	1199ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-24 15:33:34	9176ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-23 13:05:56	9023ms	4 NS 1 A 0 MX	🔓 Insecure
2026-07-07 12:26:27	944ms	4 NS 1 A 0 MX	🔓 Insecure
2026-06-26 19:18:52 shown	2408ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-20 21:46:06	1239ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-16 20:28:47	9854ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-16 20:10:12	2395ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-16 20:04:46	657ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-16 20:01:33	2795ms	2 NS 2 A 1 MX	🔓 Insecure