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numbertheoryfoundation.org

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First seen 2026-04-14 · Last seen 2026-05-07 · ok HTTP/1.1 200 2235 ms crawled 2026-05-07

US · 18.1.37.31 · AS3 Massachusetts Institute of Technology

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Number Theory Foundation

Technology

Server
Apache

Registration

Registrar
NameCheap, Inc.
Created
2019-10-22
Expires
2029-10-22 1251 days left
Updated
2019-12-22
Name servers
  • dns1.registrar-servers.com
  • dns2.registrar-servers.com

DNS records live

NS
  • dns1.registrar-servers.com
  • dns2.registrar-servers.com
MX
  • 10 eforward1.registrar-servers.com
  • 10 eforward2.registrar-servers.com
  • 10 eforward3.registrar-servers.com
  • 15 eforward4.registrar-servers.com
  • 20 eforward5.registrar-servers.com

Email authentication partial

SPF
v=spf1 include:spf.efwd.registrar-servers.com ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-04-10 to 2026-07-09
Expires in 51 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://numbertheoryfoundation.org/

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

Links to (6)

Linked from (2)