csbackend.dk

📜 Historical scan 2026-09-06 12:18:59 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

csbackend.dk is a .dk domain served by 2 nameservers (amanda.ns.cloudflare.com, logan.ns.cloudflare.com). It was registered on 21 February 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.18.8.57 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1-dk.centerasecurity.dk, mx2-dk.centerasecurity.dk and 1 more. 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
amanda.ns.cloudflare.com	108.162.192.63 172.64.32.63 173.245.58.63 2606:4700:50::adf5:3a3f 2803:f800:50::6ca2:c03f 2a06:98c1:50::ac40:203f	amanda.ns.cloudflare.com amanda.ns.cloudflare.com amanda.ns.cloudflare.com amanda.ns.cloudflare.com amanda.ns.cloudflare.com amanda.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
logan.ns.cloudflare.com	108.162.193.198 172.64.33.198 173.245.59.198 2606:4700:58::adf5:3bc6 2803:f800:50::6ca2:c1c6 2a06:98c1:50::ac40:21c6	logan.ns.cloudflare.com logan.ns.cloudflare.com logan.ns.cloudflare.com logan.ns.cloudflare.com logan.ns.cloudflare.com logan.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 128ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.18.8.57	300s	—	AS13335	Cloudflare, Inc.	104.16.0.0/14	—	—
104.18.9.57	300s	—	AS13335	Cloudflare, Inc.	104.16.0.0/14	—	—

📧 MX Records#

3 records 121ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx1-dk.centerasecurity.dk	128.76.60.167 128.76.60.187 89.233.19.127 89.233.19.127 89.233.19.188 89.233.19.188	mx6.centerasecurity.dk mx6.centerasecurity.dk 127.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk 188.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3292 TDC Holding A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S
10	300s	mx2-dk.centerasecurity.dk	128.76.60.168 128.76.60.169 89.233.19.128 89.233.19.128 89.233.19.129 89.233.19.129	mx6.centerasecurity.dk mx6.centerasecurity.dk 128.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk 129.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3292 TDC Holding A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S
20	300s	mx3-dk.centerasecurity.dk	128.76.60.187 89.233.19.129 89.233.19.129	mx6.centerasecurity.dk 129.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S

🔷 AAAA Records (IPv6)#

2 records 127ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700::6812:839	300s	—	AS13335	Cloudflare, Inc.	2606:4700:0:0:0:0:0:0/41	—	—
2606:4700::6812:939	300s	—	AS13335	Cloudflare, Inc.	2606:4700:0:0:0:0:0:0/41	—	—

🔐 HTTPS Records#

1 records 128ms

Priority	Target	SvcParams
1 service	.	alpn="h2" ipv4hint=104.18.8.57,104.18.9.57 ipv6hint=2606:4700::6812:839,2606:4700::6812:939

🔌 SRV Records#

1 records 156ms

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

📝 TXT Records#

5 records 260ms

TXT Record
_globalsign-domain-verification=3I1VW9vCjPc9BMTvaFREt8gSE63CfEXnb6PVsmRVc7
atlassian-domain-verification=0tMkGqBybYVbAJBlWf94bfCtJuuEdLkeCEnp5tSED3uMUOoa2x50sG/1P0lig9st
MS=ms51067431
v=spf1 include:_spf.centerasecurity.dk include:amazonses.com include:spf.protection.outlook.com -all
vt9ja7da3b8niojcebk7ggfsnv

✉️ SPF#

Policy	Record (csbackend.dk)
-all (hard fail)	v=spf1 include:_spf.centerasecurity.dk include:amazonses.com include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.csbackend.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:640aea3defeb3@dmarc.centerasecurity.com;

📬 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 15:59:36

www	104.18.8.57 104.18.9.57 2606:4700::6812:839 2606:4700::6812:939 (AS13335) (address records, no CNAME)
www vs bare domain	Same network csbackend.dk: 104.18.8.57 104.18.9.57 2606:4700::6812:839 2606:4700::6812:939 (AS13335) www.csbackend.dk: 104.18.8.57 104.18.9.57 2606:4700::6812:839 2606:4700::6812:939 (AS13335)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.csbackend.dk	25feaT4yky4WlLKQVxUMx_BBZ_JSy012sz8_2bswH3s
TXT	_acme-challenge.csbackend.dk	oo-J29oP3M8cMx6RK3aVIaCw5-OdHsml7cLTJkOGOL4

🔗 TLSA / DANE#

6 records 91ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx1-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…
SMTP _25._tcp.mx2-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx2-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…
SMTP _25._tcp.mx3-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…
SMTP _25._tcp.mx3-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…

🔐 DNSSEC#

201ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2413951378
Primary NS (MNAME)	amanda.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-10 09:11:01

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2014-02-21
Expires	2029-02-28 (861d)

📋 WHOIS#

⏱️ Lookup Timing#

39ms

128ms

121ms

AAAA

127ms

TXT

260ms

CAA

131ms

HTTPS

128ms

TLSA

91ms

SOA

0ms

MTA-STS

140ms

DNSSEC

201ms

SRV

156ms

Total

1134ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-15 15:59:36	1574ms	2 NS 2 A 3 MX	🔓 Insecure
2026-10-13 13:48:23	1492ms	2 NS 2 A 3 MX	🔓 Insecure
2026-10-12 06:59:02	1998ms	2 NS 2 A 3 MX	🔓 Insecure
2026-10-01 17:33:30	3221ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-30 17:25:45	1244ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-29 17:16:39	743ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-26 13:23:52	782ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-22 11:09:55	1960ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-13 13:25:23	1813ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-06 12:18:59 shown	1134ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-03 03:46:14	947ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-30 17:03:05	969ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-26 21:01:10	917ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-24 19:11:30	12891ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-22 15:27:18	5676ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-21 15:22:43	3190ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-19 03:51:08	5908ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-18 01:36:36	5787ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-13 20:37:06	1614ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-03 18:36:19	1545ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-01 02:10:59	2449ms	2 NS 2 A 3 MX	🔓 Insecure
2026-07-26 03:42:00	9361ms	2 NS 2 A 3 MX	🔓 Insecure
2026-07-23 00:44:06	10000ms	2 NS 2 A 3 MX	🔓 Insecure
2026-07-21 03:14:05	2147ms	2 NS 2 A 3 MX	🔓 Insecure
2026-07-19 23:13:00	25147ms	2 NS 2 A 3 MX	🔓 Insecure