sql-tutorial.app

.app crawl

First seen 2026-04-14 · Last seen 2026-05-08 · ok HTTP/1.1 200 2063 ms crawled 2026-05-08

US · 172.67.153.32 · AS13335 Cloudflare, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title: SQL Tutorial
Description: SQL Tutorial is the easiest, most interactive way to learn & practice SQL online. Learn in an interactive environment. Understand how SQL works.
Language: en
Canonical: https://sql-tutorial.app

Technology

CDN: Cloudflare
CMS: Gatsby

Third-party hosts loaded (1)

res.cloudinary.com×10

DNS records live

NS

amanda.ns.cloudflare.com
elmo.ns.cloudflare.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

TXT

google-site-verification=IGRgHZtiIqxEChlurgpuK8uCw9clrUiCxAIQBCv9QgI
hosting-site=sql-tutorial-ljs

Email authentication weak

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

Certificate (current)

WE1

from 2026-03-19 to 2026-06-17

Expires in 30 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://sql-tutorial.app/

present

strict-transport-security

findings

missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

strict-transport-security: max-age=31556926

Links to (4)

Linked from (3)