ceng.dk DNS records

🖥️ Nameservers2 records 40ms

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 Records2 records 45ms

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 Records1 records 46ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	ceng-dk.mail.protection.outlook.com	2a01:111:f403:ca04::b 2a01:111:f403:ca09::2 2a01:111:f403:ca09::6 2a01:111:f403:ca09::7 52.101.68.29 52.101.73.16 52.101.73.2 52.101.73.22	mail-dbbpr03cu00103.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-as9pr07cu00302.inbound.protection.outlook.com mail-am7pr05cu00106.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 → 52.98.243.56
🔶 Autoconfig	104.21.90.159

🔷 AAAA Records (IPv6)2 records 38ms

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 Records1 records 43ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.90.159,172.67.202.112 ech=AEX+DQBBsgAgACAWRkajYrnUf/6Hoiwfkpt1ur1m76G3SgxOJRDm+UNqJwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:5a9f,2606:4700:3037::ac43:ca70

🔌 SRV Records1 records 149ms

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

📝 TXT Records2 records 198ms

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

🔗 TLSA / DANE

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

🔐 DNSSEC133ms

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

🏷️ SOA0ms

Field	Value
Serial	2410319259
Primary NS (MNAME)	brianna.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

40ms

A

45ms

MX

46ms

AAAA

38ms

TXT

198ms

CAA

62ms

HTTPS

43ms

TLSA

183ms

SOA

0ms

MTA-STS

8043ms

DNSSEC

133ms

SRV

149ms

Total

9176ms

🕐 Scan History

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