indexo.dev

oscarlevin.com

.com crawl

First seen 2026-04-21 · Last seen 2026-05-14 · ok HTTP/1.1 200 490 ms crawled 2026-05-14

US · 172.67.154.61 · AS13335 Cloudflare, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Welcome - Oscar Levin, Ph.D.
Description
Teaching Math and Stuff
Language
en
Canonical
https://math.oscarlevin/com//
Feeds

Technology

CDN
Cloudflare
Fonts
  • Font Awesome

Third-party hosts loaded (3)

  • cdn.bootcss.com×1
  • math.oscarlevin×1
  • use.fontawesome.com×1

Social

Registration

Registrar
NameCheap, Inc.
Created
2008-02-26
Expires
2027-02-26 281 days left
Updated
2026-02-27
Name servers
  • barbara.ns.cloudflare.com
  • henry.ns.cloudflare.com

DNS records live

NS
  • barbara.ns.cloudflare.com
  • henry.ns.cloudflare.com
MX
  • 10 mx1-hosting.jellyfish.systems
  • 20 mx2-hosting.jellyfish.systems
  • 30 mx3-hosting.jellyfish.systems
TXT
  • MAltYWlsLm9zY2FybGV2aW4uY29tLgo=

Email authentication weak

SPF
not published
DMARC
not published
DKIM
  • default: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz4Zhak+AKGL7JYjZZ1qR4JYn8mAdF2jS/xF1cCHVwx+q8Z+Gd2Dvg4oegttFov0c20kgtzIWfbZseD…
selectors probed

Certificate (current)

WE1
from 2026-05-11 to 2026-08-09
Expires in 80 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://math.oscarlevin.com/

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

Links to (3)

Linked from (1)