Dive into our data, search now!

We offer robust APIs and data services for domainers, data crawlers, security teams and many more.

385.2 M

Domains known to webXtrend

9.8 M

New domains in the last 30 days

62.8 M

Social media profiles detected

groundrules.dev

Get an email when its DNS, website or certificate changes.

groundrules.dev serves a website of its own over HTTPS. It answers on IPv4 only, with a valid TLS certificate and MX records for mail.

795,616 other domains share an IP address with it.

The most recent crawl returned the page title “CLAUDE.md & AGENTS.md Builder for AI Coding Agents | Groundrules” and 60,447 bytes of HTML.

Domain properties

Property Value Explanation
Top-level domain .dev 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 yes 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 only IPv4 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 795,616 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": "groundrules.dev"}'

Create a free account Read the API docs

Detected social media networks

No social networks found on this website.

Similar websites

Website Similarity
BuildBot — Build agents once, deploy them everywhere
Build AI agent configurations visually and export to Claude Code (CLAUDE.md) and Cursor (.cursor/rules). Free visual builder — no account required.
82 %
mdpantry: starter files for the markdown your agent reads
Starter files for the markdown AI agents read, each with a label saying what to change. Copy one into your repository and fill it in.
82 %
Prompt Generator Website - Spec + AGENTS.md for AI coding agents
Describe your app, get a complete build specification plus AGENTS.md, CLAUDE.md and Cursor rules for Claude Code, Cursor or Lovable. 2 specs free, no account...
82 %
Bedrock — The workspace for vibe coding
A local-first, markdown desktop workspace for the context documents that drive AI-assisted development. Typed library, version history, a token-aware context...
82 %
Quartermaster — Every agent’s gear. One registry.
The open-source, local-first registry for AI-agent context — skills, rules, agents, and MCP configs across Claude Code, Cursor, Codex, Gemini CLI, and 7 more...
81 %
CodeAI.md - Give Every Coding Agent One Codebase Briefing
CodeAI.md is a ready-made AGENTS.md for your repository - layout, commands, conventions, and integration points every coding agent reads.
81 %
AGENTS.md – OpenAI Codex, GitHub Copilot & Cursor AI Agents in One Markdown File
Download the ultimate AGENTS.md file to unlock OpenAI Codex, GitHub Copilot, Cursor and more AI coding agents in a single markdown hub—boost productivity today!
81 %
ContextLoom — The workspace beside your AI coding agent
A native macOS workspace for Claude Code and Codex. Keep specs, decisions and CLAUDE.md as plain Markdown your agent reads — context that outlasts sessions.
81 %
Production-ready agent rules from your brief · Ruleskein
Turn a project brief into a production-ready Markdown pack—README, rules, skills, and integration paths for Cursor, Claude Code, Copilot, and your stack.
81 %
Fedmo — AI Context IDE
Write, organise, and export Markdown files for AI tools like Cursor and Claude.
81 %
LodeFlow — a workspace for Claude Code and Codex
A free, terminal-first workspace for Claude Code, Codex, Antigravity and Kimi. Keep agents, Markdown plans, and project files together on Windows and macOS....
81 %
Getagentsmd.com — one context file, every AI coding agent
Generate a production-grade AGENTS.md your AI coding agent reads on every task. Detect your stack, tune guardrails, export to Cursor, Claude Code, Copilot, G...
81 %
outlined - The intelligent file explorer for AI-first development
Manage hundreds of projects, discover Claude Code artifacts, and organize your agent ecosystem from a single interface. Purpose-built for developers working...
80 %
contexts.md - the directory of AI agent context and rules files
contexts.md is a directory of agent context files - browse community CLAUDE.md, AGENTS.md, .cursorrules, .cursor/rules, copilot-instructions.md, Windsurf rul...
80 %
Archcore — Spec-Driven Development & Context Engineering
Spec-driven development and context engineering for AI coding agents. Keep specs, architecture, decisions, rules, and plans versioned with code.
80 %
Turbo - The AI-Native Codebase for Coding Agents
A full-stack TypeScript monorepo with versioned agent memory, task skills, and generated contracts. Next.js, Expo, Hono, Better Auth, and Drizzle - wired for...
80 %
Deployment Paused
80 %
Bring Your AI — portable agent setup across Claude Code, Codex, and Cursor
Stop rebuilding your agent setup every time you switch tools. Move, sync, distill, or build local-first AI operating context across Claude Code, Codex, and C...
80 %
c7r — A visual editor for Claude Code agents
Drop in your skills. See the agent you built. A visual editor for the CLAUDE.md, skills/, and plugins you've been stitching by hand.
80 %
groundwork — Build your AGENTS.md
A decision guide that helps developers build AGENTS.md files for their projects.
80 %

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 Let's Encrypt
Valid from 9/13/2026
Valid to 12/12/2026
Time until expiry 50 days

Last successful crawl

Title CLAUDE.md & AGENTS.md Builder for AI Coding Agents | Groundrules
Description Build your CLAUDE.md, AGENTS.md, and system prompts from proven, reusable blocks. A free visual builder for Claude Code and other AI coding agents.
Content-Length 60,447 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
216.150.1.1 7/27/2026
216.150.16.1 7/27/2026
76.76.21.21 7/20/2026
Mail server Priority Last updated
route3.mx.cloudflare.net 11 8/3/2026
route1.mx.cloudflare.net 73 8/3/2026
route2.mx.cloudflare.net 98 8/3/2026
route2.mx.cloudflare.net 6 7/20/2026
route1.mx.cloudflare.net 37 7/20/2026
Name server Last updated
art.ns.cloudflare.com 7/20/2026
naomi.ns.cloudflare.com 7/20/2026

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

216.150.1.1 635,725 domains · here since 9/15/2026
Domain On this IP since
zzzzhub.xyz 10/19/2026
zzzsg.com 10/17/2026
zzzpost.com 9/28/2026
zzzip.kr 10/8/2026
zzz.toys 9/23/2026
zzz.bingo 10/12/2026
zzz.art 10/8/2026
zzxgim.com 9/16/2026
zztbsw.info 10/4/2026
zzpzt.cn 9/14/2026
zzpwerkvinden.nl 9/15/2026
zzppy.nl 9/16/2026
and 635,712 more
216.150.16.1 159,891 domains · here since 9/15/2026
Domain On this IP since
zzzzhub.xyz 10/19/2026
zzzsg.com 10/17/2026
zzz.legal 10/3/2026
zzyt87.com 10/15/2026
zzxwts.info 10/12/2026
zzxfqt.info 10/15/2026
zzpdld.info 10/16/2026
zzjprf.info 10/20/2026
zzim.site 10/11/2026
zzgyjx.com 10/19/2026
zzgarage.com 10/17/2026
zzentertainment.site 9/21/2026
and 159,878 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.