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

GuideJuly 18, 2026·6 min read

Verisign RDAP: .com Lookups and the 404 Domain Not Found Response

How to query rdap.verisign.com for .com and .net domains, what causes the 404 domain not found response, and how to follow the registrar referral.

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GuideJuly 9, 2026·14 min read

Every EPP Status Code, Explained (With Real Lookups)

GuideMay 11, 2026·11 min read

Why we normalize RDAP responses

GuideApril 24, 2026·7 min read

ASN Lookups Explained: What RDAP Returns Across the Five Registries

GuideApril 14, 2026·6 min read

WHOIS Port 43 Is Dead. What Replaces It?

ComparisonApril 1, 2026·7 min read

WhoisXML API Alternatives: 7 Options Compared (2026)

ComparisonMarch 26, 2026·8 min read

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

GuideMarch 15, 2026·5 min read

Why Your Domain Checker Breaks on .org and .dev

GuideMarch 10, 2026·5 min read

WHOIS Rate Limits Are Killing Your App

TutorialMarch 4, 2026·9 min read

The RDAP JSON Response Decoded

TutorialMarch 3, 2026·7 min read

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

GuideMarch 2, 2026·9 min read

How to Look Up IP Ownership via RDAP

TutorialMarch 1, 2026·4 min read

Domain Expiration Monitoring with GitHub Actions

TutorialFebruary 28, 2026·2 min read

Bulk Domain Lookup API — Check 10 Domains in One Request

TutorialFebruary 27, 2026·8 min read

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

ComparisonFebruary 26, 2026·7 min read

7 WHOIS API Alternatives Compared (2026 Pricing & Limits)

GuideFebruary 25, 2026·9 min read

WHOIS to RDAP Migration Guide with Code Examples

TutorialFebruary 24, 2026·6 min read

RDAP API Python SDK — Getting Started Guide

GuideFebruary 23, 2026·5 min read

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