indexo.dev

s-schumann.com

.com crawl

First seen 2026-05-09 · Last seen 2026-05-15 · ok HTTP/1.1 200 1180 ms crawled 2026-05-15

US · 172.67.143.97 · AS13335 Cloudflare, Inc.

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title
Sebastian Schumann - Welcome!
Description
Website of Sebastian Schumann. He is the Vice President Engineering with immmr GmbH and currently based in Berlin, Germany. Prior to this, he worked for Slovak Telekom (part of Deutsche Telekom group) and studied at the Slovak University of Technology, both in Bratislava, Slovakia. Sebastian was born in Plauen, Germany and went to school to the Lessing-Gymnasium Plauen. He studied at the University of Telecommunications (Hochschule für Telekommunikation) in Leipzig, Germany.
Language
en
Generator
nanoc 4.10.0
Canonical
https://www.s-schumann.com/

Open Graph

url
https://www.s-schumann.com/
title
Website of Sebastian Schumann
description
Sebastian Schumann lives and works in Berlin, Germany and is Vice President of Engineering at immmr, a Deutsche Telekom company. Sebastian's key expertise is the evolution of carrier communication services.

Technology

CDN
Cloudflare
Third-party hosts loaded (7)
  • plus.google.com×3
  • github.com×1
  • www.facebook.com×1
  • www.flickr.com×1
  • www.linkedin.com×1
  • www.slideshare.net×1
  • www.twitter.com×1

Social

Contact

Address
st update: 3. June 2018

Registration

Registrar
Cloudflare, Inc.
Created
2000-11-09
Expires
2026-11-09 172 days left
Updated
2025-10-10
Name servers
  • art.ns.cloudflare.com
  • lucy.ns.cloudflare.com

DNS records live

NS
  • art.ns.cloudflare.com
  • lucy.ns.cloudflare.com
MX
  • 10 mail.protonmail.ch
  • 20 mailsec.protonmail.ch
TXT
  • protonmail-verification=99843be82c096cdf764c9756732772442a7d1b0e
Verified for
  • Google

Email authentication partial

SPF
v=spf1 include:_spf.protonmail.ch mx ~all
softfail (~all)
DMARC
v=DMARC1; p=none
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-05-13 to 2026-08-11
Expires in 83 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.s-schumann.com/

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

Links to (8)

Linked from (1)