masterbooks.com — domain check, WHOIS, DNS & reputation

HTML metadata

Title: Master Books Christian Homeschool Curriculum
Description: Academically effective Christian homeschool curriculum with a bible-based approach in all subjects, grades K-12.
Language: en
Canonical: https://www.masterbooks.com/

Open Graph

url: https://www.masterbooks.com/home
title: Master Books Christian Homeschool Curriculum
site name: masterbooks.com
description: Academically effective Christian homeschool curriculum with a bible-based approach in all subjects, grades K-12.

Technology

CDN: Cloudflare
CMS: Gatsby
Stack: PHP

Analytics

Google Tag Manager

Social widgets

YouTube Embed

Third-party hosts loaded (6)

www.youtube.com×2
cdn.jsdelivr.net×1
cdn.noibu.com×1
www.google.com×1
www.googletagmanager.com×1
www.gstatic.com×1

Social

Contact

Phone

Registration

Registrar

Cloudflare, Inc.

Created

2002-03-29

Expires

2027-03-29 299 days left

Updated

2024-09-19

Name servers

brit.ns.cloudflare.com
fonzie.ns.cloudflare.com

DNS records live

NS

brit.ns.cloudflare.com
fonzie.ns.cloudflare.com

MX

0 masterbooks-com.mail.protection.outlook.com

TXT

tJEGIYJes29eU126Q15gyEoQqMrarv

Verified for

Meta

Email authentication strong

SPF

v=spf1 mx a ip4:40.134.45.144/28 include:spf.protection.outlook.com include:mail.zendesk.com -all

strict (-all)

DMARC

v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:re+tr6ddfi2i0k@dmarc.postmarkapp.com,mailto:notifications@nlpg.com; ruf=mailto:notifications@nlpg.com; rf=afrf; pct=100; ri=86400; aspf=r; adkim=r; fo=1

policy: quarantine · sp=quarantine

DKIM

selector1: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDFEM35qm/H08udoBcEz+9Da1ogbe9FF3APqjK+dvBkecfnfRagjtC6fna5Qy5PL7xFyFWom0tKq6Y22cdd/r…
selector2: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDVMfyooYTn9yInRo/xLuvDF38EdFaRuf3ViKXa1gmP3cCpuL7gEnrVlnHYy5tFjqxV4zgbMyqXDlvfTlFf+K…

selectors probed

Certificate (current)

R13

from 2026-04-06 to 2026-07-05

Expires in 32 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 90/100 Checked live page: https://www.masterbooks.com/

present

strict-transport-security
content-security-policy
content-security-policy-report-only
x-frame-options
x-content-type-options

findings

missing Referrer Policy
missing Permissions Policy

Header values

x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
content-security-policy: frame-ancestors https://www.nlpg.com https://www.masterbooks.com;
strict-transport-security: max-age=31536000; includeSubDomains
content-security-policy-report-only: font-src www.paypalobjects.com fonts.gstatic.com use.typekit.net *.typekit.net *.gstatic.com https://fonts.gstatic.com https://use.fontawesome.com https://cdn.nlpg.com https://cdn.masterbooks.com maxcdn.bootstrapcdn.com data: 'self' 'unsafe-inline'; form-action geostag.cardinalcommerce.com geo.cardinalcommerce.com 1eafstag.cardinalcommerce.com 1eaf.cardinalcommerce.com centinelapistag.cardinalcommerce.com centinelapi.cardinalcommerce.com pilot-payflowlink.paypal.com www.paypal.com www.sandbox.paypal.com *.paypal.com *.cardinalcommerce.com 3ds-secure.cardcomplete.com www.clicksafe.lloydstsb.com pay.activa-card.com *.wirecard.com acs.sia.eu *.touchtechpayments.com www.securesuite.co.uk rsa3dsauth.com *.monzo.com *.arcot.com *.wlp-acs.com * 'self' 'unsafe-inline'; frame-ancestors www.gstatic.com *.certcapture.com *.masterbooks.com *.nlpg.com self https: 'self'; frame-src fast.amc.demdex.net *.adobe.com geostag.cardinalcommerce.com geo.cardinalcommerce.com 1eafstag.cardinalcommerce.com 1ea

Links to (7)

Linked from (1)

schoolinswag.com×1