huettner.io

.io crawl

First seen 2026-05-06 · Last seen 2026-05-06 · ok HTTP/1.1 200 1100 ms crawled 2026-05-13

US · 185.199.111.153 · AS54113 Fastly, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Description: Personal website of Frank Huettner, Assistant Professor of Decision Sciences at SKK GSB.
Language: en
Canonical: https://huettner.io/

Technology

CDN: Fastly
Server: GitHub.com

Fonts

Google Fonts

Third-party hosts loaded (7)

cdn.jsdelivr.net×7
github.githubassets.com×2
unpkg.com×2
badge.dimensions.ai×1
d1bxh8uas1mnw7.cloudfront.net×1
fonts.googleapis.com×1
polyfill.io×1

Social

DNS records live

NS

dns1.registrar-servers.com
dns2.registrar-servers.com

MX

10 in1-smtp.messagingengine.com
20 in2-smtp.messagingengine.com

Email authentication weak

SPF: v=spf1 include:spf.messagingengine.com ?all
neutral (?all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

R13

from 2026-05-01 to 2026-07-30

Expires in 72 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://huettner.io/

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=31556952

Links to (11)

Linked from (1)

cireqmontreal.com×1