indexo.dev

parallel.org.uk

.uk crawl

First seen 2026-04-15 · Last seen 2026-05-12 · ok HTTP/1.1 200 579 ms crawled 2026-05-10

US · 18.245.31.37 · AS16509 Amazon.com, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Parallel by Simon Singh
Description
Weekly mathematics challenges & live maths events for secondary school students.
Language
en

Open Graph

url
http://parallel.org.uk
title
Parallel by Simon Singh
locale
en_GB
site name
Parallel
description
A home for curious mathematical minds. For ages 10-16 anywhere in the world. 100% free. Live interactive Maths Circles and puzzle sheets every week.

Technology

CDN
Amazon CloudFront
CMS
Gatsby
Fonts
  • Google Fonts

Third-party hosts loaded (1)

  • fonts.googleapis.com×1

Registration

Registrar
Namecheap, Inc.
Created
2017-05-19
Expires
2027-05-19 365 days left
Updated
2026-04-19
Name servers
  • mallory.ns.cloudflare.com.
  • sevki.ns.cloudflare.com.

DNS records live

NS
  • mallory.ns.cloudflare.com
  • sevki.ns.cloudflare.com
MX
  • 1 smtp.google.com
TXT
Show 6 TXT records
  • firebase=parallel-cf800
  • google-site-verification=TLODYnFqKw-KbMIkErvamz5A6fW4f7-lsYMAt8b9PYQ
  • google-site-verification=ydVAmY4oUcif4sD9_N2PN7iWz_Y3vob1j4Nbxgqn_5w
  • ms-domain-verification=61a05aa8-8ea8-41bb-b9f8-8226b708176c
  • ms-domain-verification=b48a787d-bace-4385-8f77-6bbefb1c3ffb
  • ms-domain-verification=cc35d52c-9034-4e8f-ac5f-8e9c41dc4e50

Email authentication weak

SPF
v=spf1 include:_spf.mlsend.com include:spf.privateemail.com include:spf.protection.outlook.com include:_spf.firebasemail.com -all
strict (-all)
DMARC
not published
DKIM
  • google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArCIKZDHxa8xQZIN/qd3vfxlqaBhxK9vUeW0pzEk6xpZONKJii42O8ZF5nC7xHMcIAafW3bFIkwjmSq…
selectors probed

Certificate (current)

Amazon RSA 2048 M04
from 2026-01-05 to 2027-02-04
Expires in 261 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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 (2)