CompleteDNS is a DNS research platform that tracks nameserver modifications and domain drops, with over twenty years of history and billions of recorded changes. The CompleteDNS API exposes domain-scoped lookups that return the chronological history of nameserver changes, drop events, and parking status for a given domain. Both a current v2 API and a legacy v1 API are available, authenticated by API key.
URL: Visit APIs.json URL
- Type: Index
- Position: Consumer
- Access: 3rd-Party
- DNS, DNS History, Domain Intelligence, Domains, Nameservers, Threat Intelligence
- Created: 2025-02-09
- Modified: 2026-04-28
The CompleteDNS API v2 returns the historical nameserver record for a domain, including counts of changes and drops, years of history, and a chronologically ordered list of events. Authentication uses an API key passed as a query parameter.
Human URL: https://completedns.com/api/documentation/v2
Base URL: https://api.completedns.com/v2
- DNS History, Domains, Lookup, Nameservers
- Domain DNS history lookup
- Drop event tracking
- Parking detection
- API key authentication
- Threat intelligence and domain pivot investigation
- Brand protection monitoring
- Domain acquisition research
The legacy CompleteDNS API v1 returns the historical nameserver record for a domain. Includes drop and change counts, TLD support indicator, and chronologically ordered events with added/removed nameservers. CompleteDNS recommends migrating to v2.
Human URL: https://completedns.com/api/documentation/v1
Base URL: https://api.completedns.com/v1
- DNS History, Legacy, Lookup, Nameservers
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- JSON-LD Context
- DNS History JSON Schema
FN: Kin Lane
Email: kin@apievangelist.com