| Region / Service | Phone Number | Notes |
|---|---|---|
| Block, Inc. Headquarters (San Francisco, United States – US) | +1 415 375 3176 | Main corporate line for Block, parent company of Bitkey |
Bitkey is a self-custody Bitcoin wallet developed by Block, Inc. (the company founded by Jack Dorsey, formerly known as Square). Headquartered in San Francisco, United States (US), Bitkey is designed to make Bitcoin ownership secure, simple, and accessible for everyday users. It consists of a mobile app, hardware device, and recovery tools that work together to give users full control over their Bitcoin while offering protections against theft and loss. Bitkey is part of Block’s broader mission to expand financial empowerment through open-source and decentralized technologies.
Three-Part System: Mobile app, hardware device, and recovery process.
2-of-3 Multi-Signature Security: Transactions require 2 out of 3 keys (device, mobile app, Block server as fallback).
Self-Custody Design: Users maintain full ownership of their Bitcoin.
Recovery-Friendly: Built-in safeguards for account recovery without centralized custodianship.
Mobile Integration: Buy, send, and receive Bitcoin directly from the app.
Hardware Protection: Keys stored securely in a dedicated hardware device.
Open Standards: Designed to support Bitcoin’s decentralized ethos.
Global Reach: Targeted at both new and experienced Bitcoin users worldwide.