d2l.ai

.ai crawl

First seen 2026-04-13 · Last seen 2026-05-13 · ok HTTP/1.1 200 341 ms crawled 2026-05-06

US · 18.165.140.62 · AS16509 Amazon.com, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title: Dive into Deep Learning — Dive into Deep Learning 1.0.3 documentation
Language: en

Technology

CDN: Amazon CloudFront
Server: AmazonS3
CMS: Gatsby

Social widgets

Twitter Widget

Third-party hosts loaded (2)

buttons.github.io×1
platform.twitter.com×1

Social

Registration

Registrar

NameCheap, Inc.

Created

2018-12-26

Expires

2030-12-26 1681 days left

Updated

2022-07-12

Name servers

ns-6.awsdns-00.com
ns-704.awsdns-24.net
ns-1236.awsdns-26.org
ns-1901.awsdns-45.co.uk

DNS records live

NS

ns-1236.awsdns-26.org
ns-1901.awsdns-45.co.uk
ns-6.awsdns-00.com
ns-704.awsdns-24.net

Email authentication no MX

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

Certificate (current)

Amazon RSA 2048 M04

from 2026-05-02 to 2026-11-16

Expires in 180 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://d2l.ai/

findings

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