Blog

Articles about RDAP, domain data, and the modern WHOIS replacement.

GuideMay 11, 2026·11 min read

Why we normalize RDAP responses

Two correct RDAP clients return different strings for the same domain. Here is one domain shown raw versus normalized, and the rules that produced the diff.

Read article

GuideApril 24, 2026·7 min read

Blog

Why we normalize RDAP responses

ASN Lookups Explained: What RDAP Returns Across the Five Registries

WHOIS Port 43 Is Dead. What Replaces It?

WhoisXML API Alternatives: 7 Options Compared (2026)

How to Check if a Domain Is Available (3 Methods, 2026)

Why Your Domain Checker Breaks on .org and .dev

WHOIS Rate Limits Are Killing Your App

The RDAP JSON Response Decoded

Check Domain Availability with One API Call (1,200+ TLDs, 2026)

How to Look Up IP Ownership via RDAP

Domain Expiration Monitoring with GitHub Actions

Bulk Domain Lookup API — Check 10 Domains in One Request

Domain Expiration API: Get the Expiry Date in 5 Languages (2026)

7 WHOIS API Alternatives Compared (2026 Pricing & Limits)

WHOIS to RDAP Migration Guide with Code Examples

RDAP API Python SDK — Getting Started Guide

RDAP vs WHOIS: The Complete Comparison for Developers (2026)