bootspruefung.de

.de crawl

First seen 2026-04-20 · Last seen 2026-05-17 · ok HTTP/1.1 200 760 ms crawled 2026-05-13

US · 151.101.1.195 · AS54113 Fastly, Inc.

Reputation 100/100

Classifying

HTML metadata

Title: Onlinekurs Bootsführerschein: Alle amtlichen Prüfungsfragen
Description: Alle Prüfungsfragen zum SBF-Binnen, SBF-See, Bodenseeschifferpatent, UBI, SRC, LRC und FKN. Jetzt kostenlos ausprobieren!
Language: de

Registration

Updated

2021-12-13

Name servers

ch.pro.io.
nl.pro.io.
p.dnh.net.

DNS records live

NS

ch.pro.io
nl.pro.io
p.dnh.net

MX

10 mx01.sui-inter.net
10 mx02.sui-inter.net
10 mx03.sui-inter.net

TXT

Show 4 TXT records

google-site-verification=JJrq6lzRb0d09aWazG8fqwQRLPuttiU1XlOfq_-IPwM
google-site-verification=7uVcEOFVxNlYcCwYWZCUHaX2xcy3Vpe8RXxx-Ov4SDM
firebase=bootspruefung-de-prod
pinterest-site-verification=7f72f8634e0e208f11b047f0e7c6d564

Email authentication strong

SPF

v=spf1 include:_spf.firebasemail.com include:_spf.sui-inter.net ~all

softfail (~all)

DMARC

v=DMARC1; p=quarantine; rua=mailto:6757efeb98633@ag.dmarcly.com; ruf=mailto:6757efeb98633@fo.dmarcly.com; sp=none;

policy: quarantine · sp=none

DKIM

mail: v=DKIM1;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArA4uYkcg9HqEfhe0XeyzXnH92t6E60qx/oubIudknkKS0jOQvxOQHm+nryN/q3921ErAe2CsVRPIcbpRSN0Wke…

selectors probed

Certificate (current)

WR3

from 2026-04-12 to 2026-07-11

Expires in 52 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://www.bootspruefung.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=31556926