CompleteDNS
Operator: PAPAGAL.BG LTD, Bulgaria
History of domain nameservers, changes and deletion events since 2002, with reverse lookup and an API.
Technical Infrastructure
Product
CompleteDNS, a database of historical nameserver changes and domain events with reverse nameserver lookup.
Availability and source date
Active
As of: 16 October 2026.
No functionality test has been performed.
Use in OSINT research
Shows previous nameservers and changes to them. Shared nameservers are investigative leads, not proof of a common domain operator.
Queries
| Input | Result | Result type |
|---|---|---|
| Domain / website | Stored nameservers, changes, deletion events and indications of previous domain parking. | Retrieved |
| Domain / website | When a nameserver hostname is entered: domains using that nameserver. | Retrieved |
Features
- Shows nameserver changes with a date or period.
- Marks removed nameservers as a deletion event.
- Shows indications of previous domain parking.
- Finds domains associated with a nameserver.
- Processes multiple domains and exports results depending on the plan.
Categories
- Technical Infrastructure
- DNS
Coverage
Dataset
Its own collection of historical nameserver changes since 2002. The start of collection and how up to date the records are vary by top-level domain.
Access
Requirements
Web interface in the browser. A free account is required for the Free allowance; the API, bulk queries and export are available only in paid plans. The API key is obtained from the account.
Export
Excel and CSV in paid plans; REST API output as JSON.
Provider
PAPAGAL.BG LTD
Country of establishment
Bulgaria
Interfaces
API
Available. REST API v2 for domain histories as JSON; an API key and a paid plan are required.
MCP
Not documented. Not described on the product and documentation pages reviewed.
AI agents
Not documented. Not described on the product and documentation pages reviewed.
Legal note
Limitations
- Captures nameserver histories, not a complete history of all DNS record types.
- A deletion event means that nameservers were removed and does not, by itself, prove domain deletion or a change of registrant.
- Timings may be given as a period rather than an exact date.
Guides and practical reports
Official · CompleteDNS: API v2 with an example query
CompleteDNS · EN
Explains keys, result fields, periods and error responses.