domain-digger

Operator: Felix Wotschofsky, Germany

Open-source web application for DNS, WHOIS, IP and certificate information about domains. Can also be self-hosted.

Technical Infrastructure

Product

Domain Digger open-source web application. The repository contains the software; digger.tools is the separately hosted public instance.

Availability and source date

Active

As of: 16 October 2026.

No functionality test has been performed.

Use in OSINT research

Brings technical domain information together in one interface. Helps investigate DNS connections, hosting and available certificate histories.

Queries

Input	Result	Result type
Domain / website	DNS records, WHOIS information, associated IP details and available SSL/TLS certificate history.	Retrieved
Domain / website	DNS responses from different resolvers and server locations, also displayed on a map.	Technical check according to provider

Features

Queries DNS records using different resolvers.
Compares DNS responses across multiple locations.
Shows IP details and geolocation information.
Offers brief and detailed WHOIS lookups.
Shows available SSL/TLS certificate histories.
Visualises DNS results on a map.

Coverage

Dataset

Technical domain queries and external DNS, IP, WHOIS and certificate sources. There is no evidence of a regional research collection of its own.

Access

Installation and deployment

Website · Locally installable · Self-hosted

Can run locally with pnpm or as your own web instance. The guide recommends Vercel for full functionality. According to the guide, the DNS map does not work fully on a traditional server. The public instance is separate.

Requirements

Public instance at digger.tools. Install your own instance with Node.js and pnpm. According to the guide, full functionality requires Vercel and Google BigQuery; basic operation works without BigQuery.

Export

Unknown

Provider

Felix Wotschofsky

Country of establishment

Germany

Interfaces

No API, MCP or AI integration is documented.

Maintenance

Licence

AGPL-3.0

Repository

Latest activity

Commit 10/2026

Stars

approx. 1,400 (as of 16 October 2026)

Legal note

Limitations

The public instance was blocked by a security check during source research. The features listed here are taken from the repository.
According to the setup guide, full self-hosted operation depends on Vercel features; the DNS map is limited on conventional servers.
WHOIS, location and certificate information alone does not establish a responsible person.

Guides and practical reports

Official · Setting Up Domain Digger
Felix Wotschofsky · EN
Explains local operation, Vercel dependencies and optional Google Cloud configuration.

Sources

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