cartesian.app

cartesian.app serves a website of its own over HTTPS. It answers on both IPv4 and IPv6, with a valid TLS certificate.

39,317,553 other domains share an IP address with it.

The most recent crawl returned the page title “The Interactive Handbook on Data Structures and Algorithms” and 60,631 bytes of HTML. The site links to X.

Domain properties

Property	Value	Explanation
Top-level domain	.app	Statistics for all domains we know under this TLD.
Has website	yes	A website is hosted under the domain, which does not redirect to an external domain.
Has MX-record	no	The domain has an MX record.
External redirect	no	The domain redirects to another domain.
Redirect to https	yes	The domain redirects to https.
Redirect to www.	no	The domain redirects to www.domain.
Only with www.	no	The domain can only be reached with the subdomain "www".
Only DNS, no website	no	There are no A or AAAA records in DNS.
IP-Address	Both	Shows whether the domain only has IPv4 or IPv6 or both.
SSL-Certificate	valid	Shows whether the domain has a valid SSL certificate.
Redirects	0	Number of domains that redirect to this domain.
Reverse IP	39,317,553	Number of domains with the same IP(s).

This data through the API

The data on this page is also available as JSON: /lookup for the key facts, /reverseip, /redirect and /similar for the lists, and /dnshistory with Basic and Premium. A free account comes with an API key and 100 calls a day.

curl -X POST https://api.webxtrend.com/v1.0/lookup \
  -H 'Content-Type: application/json' \
  -d '{"token": "YOUR_TOKEN", "query": "cartesian.app"}'

Create a free account Read the API docs

Similar websites

Website	Similarity
algovision.dev AlgoVision - See algorithms. Don't just read them. Interactive, step-by-step visualizations for Data Structures, Algorithms, and LeetCode problems.	84 %
thescalabledev.com TheScalableDev — Data Structures, Algorithms & System Design Fully interactive visualizations for data structures, algorithms, and system design. Follow every step of the trace, live.	83 %
algovizuals.com AlgoVizuals — Learn DSA with Visual, Step-by-Step Solutions Practice coding interview problems with built-in step-by-step visualizers for arrays, trees, graphs, DP, and more. Free, interactive, and built for interview...	83 %
adamsohn.com Adam Sohn	81 %
8f4e.com 8f4e 8f4e is a stack-oriented programming language and visual live-coding editor for real-time audio synthesis.	80 %
flikgame.com Step-by-Step Derivation Tools \| Learn Through Visualization Step-by-Step Derivation Tools - Visualize complex processes with interactive step-by-step explanations for algorithms, code execution, finance, and mathematics.	80 %
dhwaniapp.com Dhwani Note Taking App \| AI-Assisted Knowledge Hub Dhwani Note Taking is a local-first, AI-assisted desktop app for power learners. Consolidate notes, render LaTeX math, build mind maps, and chat with local L...	80 %
thealgoflow.com AlgoFlow — Master Algorithms. Actually. Step-by-step interactive visualizations for sorting, searching, data structures, and dynamic programming.	80 %
dontvibecode.com dontvibecode - Learn coding without vibe coding dontvibecode helps developers stop vibe coding and learn real programming skills with structured, hands-on coding lessons.	80 %
tryexpora.com Expora — Visual Algorithm Debugger for Coding Interviews Master algorithms visually with Expora. Step-by-step debuggers for LeetCode problems, multi-language code. The best LeetCode alternative.	80 %
algo2vis.com Animation Visualization Data Structures and Algorithms - Algo2Vis Algo2Vis is a professional interactive data structure and algorithm visualization learning platform. We dynamically and debuggable present data structures su...	80 %
plinkx.app PlinkX Download - Interactive Graph Theory Learning Platform \| Version 09.10.2026 Master network algorithms with PlinkX. Visualize Euler walks, spanning trees, flow analysis & graph coloring through hands-on interactive puzzles. Download t...	80 %
codingquestion.com CodingQuestion.com \| Interactive coding practice for students Create and share interactive coding questions. Build Parsons Problems and gap-fill exercises for coding education.	79 %
dsahelp.com DSAhelp \| Interactive Data Structure Visualizer & Tutorials Free interactive data structure visualizer for beginners. Learn linked lists, stacks, queues, binary trees, BST, sorting algorithms with animations and code...	79 %
pathbird.com Pathbird Pathbird is a next-generation textbook and learning platform for computational textbooks.	79 %
visigrab.com VisiGrab — Learn Algorithms & Data Structures with Visual Animations VisiGrab is an interactive mobile app that teaches algorithms and data structures through step-by-step visual animations. Sort, search, traverse, and optimiz...	79 %
learnming.com Learnming	79 %
techstackspace.com TechStackSpace — Learn to code by building real software Interactive courses, coding challenges, an AI tutor, and hands-on projects. Level up your dev skills the fun way.	79 %
nuclionlabs.com Nuclion Labs \| Accessible software Simulations & No-Code custom questions learning platform Experience hands-on learning with Nuclion Labs. Access fully simulated software environments and easily create custom questions with an intuitive studio. Try...	79 %
platforcode.app PlatforCode - Algorithms platform for macOS, Windows and Linux PlatforCode is a desktop app for macOS, Windows and Linux that helps developers practice algorithms, coding challenges and problem-solving in one focused wor...	79 %

Websites whose start page offers something similar, found by comparing the text of their start pages, across languages. Near-identical copies, parking pages and error pages are left out. The full list of up to 100 comes through the API: similar websites.

Last SSL certificate

Issuer	Google Trust Services
Valid from	8/18/2026
Valid to	11/16/2026
Time until expiry	32 days

Last successful crawl

Title	The Interactive Handbook on Data Structures and Algorithms
Description	Discover a unique, interactive way to master data structures and algorithms with rich visualizations, step-by-step code execution, hands-on problems, and an embedded Python coding environment—all in one immersive book.
Content-Length	60,631 bytes

Title and description as published by the page itself in its own <title> and <meta name="description"> tags.

DNS history

IPv4 address	Last updated
104.21.25.140	4/1/2026
172.67.134.74	4/1/2026
188.114.96.0	3/25/2026
188.114.97.0	3/25/2026
104.21.25.140	12/12/2025

IPv6 address	Last updated
2606:4700:3034:0:0:0:ac43:864a	7/1/2026
2606:4700:3037:0:0:0:6815:198c	7/1/2026
2606:4700:3033:0:0:0:6815:198c	4/1/2026
2606:4700:3033:0:0:0:ac43:864a	4/1/2026
2a06:98c1:3120:0:0:0:0:0	3/10/2026

Name server	Last updated
buck.ns.cloudflare.com	8/8/2024
sneh.ns.cloudflare.com	8/8/2024

The five most recent states of each record type. The full history comes through the API: DNS history.

Most recent redirect domains

No domains found.

Reverse IP neighbours

188.114.96.3 9,869,652 domains · here since 10/1/2026

Domain	On this IP since
zzzzzzzzz.xyz	10/6/2026
zzzzzzzzz.org	9/13/2026
zzzzzzzzum.icu	10/13/2026
zzzzzzys.com	9/19/2026
zzzzzyl1.cn	10/14/2026
zzzzzwwwppodjfdkodkloq.com	9/28/2026
zzzzzssss55.online	9/16/2026
zzzzzssss55.buzz	9/20/2026
zzzzzsss77.online	9/20/2026
zzzzzssj.com	9/14/2026
zzzzzn.com	9/20/2026
zzzzz7777.com	9/17/2026
and 9,869,639 more

188.114.97.3 9,869,650 domains · here since 10/1/2026

Domain	On this IP since
zzzzzzzzz.xyz	10/6/2026
zzzzzzzzz.org	9/13/2026
zzzzzzzzum.icu	10/13/2026
zzzzzzys.com	9/19/2026
zzzzzyl1.cn	10/14/2026
zzzzzwwwppodjfdkodkloq.com	9/28/2026
zzzzzssss55.online	9/16/2026
zzzzzssss55.buzz	9/20/2026
zzzzzsss77.online	9/20/2026
zzzzzssj.com	9/14/2026
zzzzzn.com	9/20/2026
zzzzz7777.com	9/17/2026
and 9,869,637 more

2a06:98c1:3120::3 9,789,127 domains · here since 9/19/2026

Domain	On this IP since
zzzzzzzzz.xyz	10/6/2026
zzzzzzzzum.icu	10/13/2026
zzzzzzys.com	9/19/2026
zzzzzyl1.cn	10/14/2026
zzzzzwwwppodjfdkodkloq.com	9/28/2026
zzzzzssss55.online	9/16/2026
zzzzzssss55.buzz	9/20/2026
zzzzzsss77.online	9/20/2026
zzzzzssj.com	9/14/2026
zzzzzn.com	9/20/2026
zzzzz7777.com	9/17/2026
zzzzz1.com	9/25/2026
and 9,789,114 more

2a06:98c1:3121::3 9,789,124 domains · here since 9/19/2026

Domain	On this IP since
zzzzzzzzz.xyz	10/6/2026
zzzzzzzzum.icu	10/13/2026
zzzzzzys.com	9/19/2026
zzzzzyl1.cn	10/14/2026
zzzzzwwwppodjfdkodkloq.com	9/28/2026
zzzzzssss55.online	9/16/2026
zzzzzssss55.buzz	9/20/2026
zzzzzsss77.online	9/20/2026
zzzzzssj.com	9/14/2026
zzzzzn.com	9/20/2026
zzzzz7777.com	9/17/2026
zzzzz1.com	9/25/2026
and 9,789,111 more

Sharing an address does not always mean sharing a server: on a CDN or a large hosting platform, millions of unrelated domains answer on the same few addresses. We measured how far that goes in Half the web sits on 276 IP addresses. The complete list of neighbours, also for an IP address, comes through the API: reverse IP lookup.

Dive into our data, search now!