indexo.dev

extendum.nl

.nl crawl

First seen 2026-05-20 · Last seen 2026-05-27 · ok HTTP/1.1 200 2334 ms crawled 2026-05-27

NL · 83.172.180.132 · AS25459 Eurofiber Cloud Infra B.V.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
Extendum, voorsprong voor accountants
Description
Extendum is het kennis- en adviescentrum voor MKB-accountantskantoren en hun klanten. Vanuit ons kantoor in Eemnes zijn wij landelijk actief.
Language
nl-NL
Canonical
https://www.extendum.nl/
Feeds

Open Graph

url
https://www.extendum.nl/
title
Extendum, voorsprong voor accountants
locale
nl_NL
site name
Extendum
description
Extendum is het kennis- en adviescentrum voor MKB-accountantskantoren en hun klanten. Vanuit ons kantoor in Soesterberg zijn wij landelijk actief.

Technology

Server
Apache
CMS
WordPress
jQuery
3.7.1
Analytics
  • Google Tag Manager

Third-party hosts loaded (3)

  • gmpg.org×1
  • www.google.com×1
  • www.googletagmanager.com×1

Contact

Phone

DNS records live

NS
  • ns1.123-web-host.biz
  • ns2.123-web-host.biz
MX
  • 0 extendum-nl.mail.protection.outlook.com
Verified for
  • Microsoft 365

Email authentication strong

SPF
v=spf1 a mx include:relay.mailbaby.net include:servers.mcsv.net ip4:80.69.76.133 ip4:87.251.42.133 ip4:79.143.220.228 include:spf.protection.outlook.com -all
strict (-all)
DMARC
v=DMARC1; p=quarantine; sp=quarantine
policy: quarantine · sp=quarantine
DKIM
  • selector1: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAseIQj0CHNKW2MFGifkp3vOjbGun1CwKgp9eAoNd6bKb/m9SHtXpy8MBaroOxOArrxrCqLF/JrGijzx…
  • k1: k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDbNrX2cY/GUKIFx2G/1I00ftdAj713WP9AQ1xir85i89sA2guU0ta4UX1Xzm06XIU6iBP41VwmPwBGRNofhBVR+e6WHUo…
selectors probed

Certificate (current)

Trust Provider B.V. TLS RSA CA G1
from 2026-05-06 to 2026-11-21
Expires in 173 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.extendum.nl/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (1)

Linked from (2)