indexo.dev

layer-four.de

.de crawl

First seen 2026-05-04 · Last seen 2026-05-11 · ok HTTP/1.1 200 2823 ms crawled 2026-05-11

US · 198.202.211.1 · AS209242 Cloudflare London, LLC

Reputation 100/100

Classifying

HTML metadata

Title
Layer Four
Language
de
Generator
Webflow

Technology

CDN
Cloudflare

Third-party hosts loaded (3)

  • cdn.prod.website-files.com×18
  • d3e54v103j8qbb.cloudfront.net×1
  • js.hs-scripts.com×1

Social

Contact

Email
Phone

Registration

Updated
2026-05-05
Name servers
  • ns77.domaincontrol.com.
  • ns78.domaincontrol.com.

DNS records live

NS
  • ns77.domaincontrol.com
  • ns78.domaincontrol.com
MX
  • 1 layerfour-de01c.mail.protection.outlook.com
TXT
  • atlassian-sending-domain-verification=9781b785-e2ee-4583-ac38-7ae4af9c5898
  • bw=xljrQtsm7nXbT7ER4dHV2B7yfKNvqjHTTtq8QlaxyZIX
  • atlassian-sending-domain-verification=9781b785-e2ee-4583-ac38-7ae4af9c5898
Verified for
  • Apple
  • Atlassian
  • Figma
  • Google
  • Microsoft 365
  • Miro
  • OpenAI

Email authentication strong

SPF
v=spf1 include:spf.protection.outlook.com include:spf-de.emailsignatures365.com -all
strict (-all)
DMARC
v=DMARC1; p=quarantine; adkim=r; aspf=r; rua=mailto:dmarc_rua@onsecureserver.net;
policy: quarantine
DKIM
Show 4 DKIM selectors
  • selector1: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuDzxNPVGcV9P/luKmRX7bFDxYhYSk/QnixUgzII0ICzulCnGWq8D4juil6DuXNTAiTQmmio/mu2dCR…
  • selector2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu2c/CHhjNoB6ML3/jNVghJNY2YF6/oHqwNLxYhBAS9a4V5ytFtjEr5LZaYtAax/Xgb52tbuiFeFz60…
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4/SF5YOTzyIlu09i7QbRYdcClRZA8qt0SKjdhkWy5HCwM+gD1HuTLgUyWhIAS4kDazc9c9mRiqksJHVMvW…
  • s2: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqJgSGQHLGtf/1vTY57hp0V5JU8XBA43DcUNK8mjPkxs6OFuiFrF0fcJDEzNfP7KIAzuMX8W0JTn2qAy696…
selectors probed

Certificate (current)

WE1
from 2026-05-08 to 2026-08-06
Expires in 78 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://www.layer-four.de/

present
  • strict-transport-security
findings
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=31536000

Links to (4)

Linked from (1)