# register | is-a.dev | Knowledge Base | Instagit

Grab your own sweet-looking '.is-a.dev' subdomain.

GitHub Stars: 9.9k

Repository: https://github.com/is-a-dev/register

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## Articles

### [What Is the Timestamp TXT Record in is-a.dev? Purpose and Usage](/is-a-dev/register/significance-of-timestamp-txt-record-in-is-a-dev)

Discover the purpose of the timestamp TXT record in is-a.dev. Learn how this machine-readable marker helps track zone refresh times and ensures data accuracy.

- Tags: deep-dive
- Published: 2026-03-09

### [How is-a.dev Enforces Subdomain Naming Conventions: Multi-Layer Validation Explained](/is-a-dev/register/how-is-a-dev-ensures-subdomain-naming-conventions)

Discover how is-a.dev enforces subdomain naming conventions with multi-layer validation including JSON block lists CI filename checks and DNS record generation Learn about their robust security.

- Tags: deep-dive
- Published: 2026-03-09

### [What CDN or DNS Provider Does is-a.dev Use?](/is-a-dev/register/cdn-or-dns-provider-used-by-is-a-dev)

Discover the CDN and DNS provider used by is-a.dev. Learn how Cloudflare powers their authoritative DNS hosting and CDN capabilities through DNSControl.

- Tags: how-to-guide
- Published: 2026-03-09

### [How to Run Tests for is-a.dev Domain Configurations: AVA Test Suite Guide](/is-a-dev/register/command-to-run-tests-is-a-dev-domain-configurations)

Execute the AVA test suite for is-a.dev domain configurations by running npm test from the repository root. Validate subdomain setups efficiently.

- Tags: how-to-guide
- Published: 2026-03-09

### [What Is internal.json in is-a.dev? Purpose and Infrastructure Protection](/is-a-dev/register/purpose-of-internaljson-in-is-a-dev-repository)

Discover the purpose of internal.json in is-a.dev. Learn how this file protects infrastructure by managing internal subdomains and blocking user registration for system-managed names.

- Tags: internals
- Published: 2026-03-09

### [How is-a.dev Handles Special DNS Record Types: CAA, DS, SRV, TLSA, and URL](/is-a-dev/register/how-is-a-dev-handles-special-record-types)

Discover how is-a.dev manages special DNS record types like CAA, DS, SRV, TLSA, and URL using JSON config and Cloudflare API. Learn about schema validation.

- Tags: deep-dive
- Published: 2026-03-09

### [How Automated Tests Validate is-a.dev Domain Configurations](/is-a-dev/register/how-are-automated-tests-performed-for-is-a-dev-configurations)

Learn how automated tests validate is-a.dev domain configurations for syntax, hierarchy, ownership, and policy compliance using the AVA test framework in the is-a-dev register repository.

- Tags: how-to-guide
- Published: 2026-03-09

### [Reserved Domains in is-a.dev: How the Registry Protects Critical Subdomains](/is-a-dev/register/what-are-reserved-domains-in-is-a-dev-and-how-handled)

Discover reserved domains in is-a.dev. Learn how critical subdomains like admin api and www are protected and automatically configured to prevent user registration.

- Tags: deep-dive
- Published: 2026-03-09

### [How is-a.dev Handles TXT Record Strings: DNS Configuration Logic Explained](/is-a-dev/register/how-is-a-dev-handles-txt-record-strings)

Explore how is-a.dev manages TXT record strings for DNS configuration. Learn about its logic for single values, arrays, and timestamp injection.

- Tags: internals
- Published: 2026-03-09

### [MX Record Format in is-a.dev: Configuring Mail Exchange Records](/is-a-dev/register/format-for-mx-records-in-is-a-dev)

Learn the MX record format in is-a.dev. Explore simple hostname arrays or objects with explicit target and priority values for efficient mail exchange configuration.

- Tags: api-reference
- Published: 2026-03-09

### [How CNAME Records Are Handled for Apex Domains in is-a.dev](/is-a-dev/register/how-are-cname-records-handled-for-apex-domains-in-is-a-dev)

Discover how is-a.dev expertly manages CNAME records for apex domains. Learn about ALIAS record conversion and root domain configuration.

- Tags: internals
- Published: 2026-03-09

### [How is-a.dev Handles Cloudflare Proxying: DNS-as-Code Implementation](/is-a-dev/register/how-is-a-dev-handles-cloudflare-proxying)

Discover how is-a.dev manages Cloudflare proxying with DNS-as-Code. Learn about their `proxied` flag implementation for A, AAAA, and CNAME records and automated validation.

- Tags: internals
- Published: 2026-03-09

### [What Is dnsconfig.js in is-a.dev? The DNS Zone Build Script](/is-a-dev/register/role-of-dnsconfigjs-in-is-a-dev)

Discover how dnsconfig.js in is-a.dev builds your DNS zone by assembling subdomain definitions and publishing to Cloudflare. Learn its crucial role in the register repository.

- Tags: internals
- Published: 2026-03-09

### [Where Are .is-a.dev Domain Configurations Stored? A Complete Guide to the Register Repository](/is-a-dev/register/where-are-is-a-dev-domain-configurations-stored)

Discover where is-a.dev domain configurations are stored. Learn about the JSON files in the is-a-dev/register repository and how they manage DNS records.

- Tags: deep-dive
- Published: 2026-03-09

### [DNS Record Types Supported by is-a.dev: Complete Registry Guide](/is-a-dev/register/dns-record-types-supported-by-is-a-dev)

Discover the 11 DNS record types supported by is-a.dev including A, AAAA, CNAME, MX, TXT, and more. Get the complete registry guide and ensure seamless domain configuration.

- Tags: api-reference
- Published: 2026-03-09

### [How to Register a Free .is-a.dev Subdomain: Complete GitHub Guide](/is-a-dev/register/how-to-register-free-is-a-dev-subdomain)

Learn how to register a free is-a.dev subdomain quickly. Fork the GitHub repository, create a JSON file, and submit a pull request for automated DNS deployment.

- Tags: getting-started
- Published: 2026-03-09