ceng.dk

Records from scan: 2026-10-18 10:19:41 · 3371ms total

⬇ 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 our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 347ms

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 318ms

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 345ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	ceng-dk.mail.protection.outlook.com	2a01:111:f403:c967::8 2a01:111:f403:ca04::a 2a01:111:f403:ca21::a 2a01:111:f403:ca48::12 52.101.181.153 52.101.185.21 52.101.68.10 52.101.73.155	mail-cpjpr04cu00100.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-maspr04cu00102.inbound.protection.outlook.com mail-miypr05cu00202.inbound.protection.outlook.com mail-wa4pr04cu00101.inbound.protection.outlook.com mail-zrxpr05cu00105.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-am7pr02cu00203.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 → 40.104.116.56
🔶 Autoconfig	172.67.202.112

🔷 AAAA Records (IPv6)#

2 records 326ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:5a9f	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:ca70	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 346ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.90.159,172.67.202.112 ech=AEX+DQBBFQAgACBKnl8CjLA8UjtHuFwXdUrr6pWTuEJP/JuSun0IYyROYQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:5a9f,2606:4700:3037::ac43:ca70

🔌 SRV Records#

1 records 431ms

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

📝 TXT Records#

2 records 625ms

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#

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

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.ceng.dk	7cJjDxdUi0lwEQ3IkiJ0dvTZVTmT3Cyp6ljWMna9JlA
TXT	_acme-challenge.ceng.dk	-ZFxXNH0EEPtCw-rfOpcloYKnMqhKs6xjppC2BBOl68

🔗 TLSA / DANE#

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

🔐 DNSSEC#

421ms

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

🏷️ SOA#

162ms

Field	Value
Serial	2417731600
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#

347ms

318ms

345ms

AAAA

326ms

TXT

625ms

CAA

304ms

HTTPS

346ms

TLSA

1506ms

SOA

162ms

MTA-STS

382ms

DNSSEC

421ms

SRV

431ms

Total

3371ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-18 10:19:41 shown	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	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