penguinrandomhouseeducation.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 425 ms crawled 2026-05-18

US · 23.185.0.3 · AS54113 Fastly, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title: Penguin Random House Education
Description: Penguin Random House Education
Language: en

Technology

Server: nginx

Registration

Registrar

CSC Corporate Domains, Inc.

Created

2017-08-07

Expires

2027-08-07 444 days left

Updated

2025-08-03

Name servers

ns1.prh.com
ns2.prh.com

DNS records live

NS

ns1.prh.com
ns2.prh.com

MX

10 us-smtp-inbound-1.mimecast.com
10 us-smtp-inbound-2.mimecast.com

Email authentication weak

SPF: not published
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

R13

from 2026-03-28 to 2026-06-26

Expires in 37 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://penguinrandomhouseeducation.com/

present

strict-transport-security

findings

short HSTS max-age
missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

strict-transport-security: max-age=300