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PhoneBlock
What it is
PhoneBlock is a free call-blocking service that uses a community-maintained database to identify unwanted advertising and spam calls. Users can report numbers through the app, website, or a personal blacklist, and reports become part of the shared list. The Android app blocks known spam calls, keeps call history, and supports reports and personal lists; it requires Android 10 or later. For incoming calls, it sends only the phone number’s SHA-1 hash and does not access contacts. Landline options include a router dongle, a Fritz!Box cloud answering machine, and a blocklist phonebook synchronized through CardDAV. The documented iPhone setup also uses CardDAV to sync numbers into contacts; a native iPhone app is in development, with beta registration available. Phone systems can download the blocklist in different formats or query it through an API. PhoneBlock is licensed under GPL-3.0 and operated as a private project. The service costs nothing, with donations optional. Its terms advise against business use and place responsibility for resulting damage on the user.
For and against
For
- Community reports feed a shared blacklist.
- Android app keeps call history and supports personal lists.
- Incoming-call handling does not access contacts.
- Landline users have three listed options.
- Free to use; donations are optional.
Against
- Android app requires Android 10 or later.
- Native iPhone app is still in development.
- iPhone setup syncs numbers into contacts through CardDAV.
- Terms advise against business use.
The verdict
PhoneBlock offers several approaches for personal and landline call blocking, backed by a shared blacklist. iPhone support is currently documented through CardDAV rather than a native app.
Who it suits
PhoneBlock suits people seeking to block spam calls on Android or configure a landline option. It may also suit phone system operators who want to download or query its blocklist.
Plans and prices
PhoneBlock
Free to use · donations optional
Read 7 Oct 2026 · phoneblock.net
On the record
- Android app
- The Android app blocks known spam calls, keeps a call history, supports spam reports and personal lists, and requires Android 10 or later.phoneblock.net · read 7 Oct 2026
- Android privacy
- For incoming calls, the Android app sends only the phone number’s SHA-1 hash and does not access contacts.phoneblock.net · read 7 Oct 2026
- Answering machine data
- When using the answering machine, PhoneBlock stores the Fritz!Box IP address for registration and compares incoming caller numbers with the spam database.phoneblock.net · read 7 Oct 2026
- Commercial use
- The terms advise against business use and place responsibility for resulting damage on the user.phoneblock.net · read 7 Oct 2026
- Community reports
- Users can report spam numbers through the app, website, or personal blacklist, and reports are added to the shared blacklist.phoneblock.net · read 7 Oct 2026
- iPhone support
- The documented iPhone setup syncs spam numbers into contacts through CardDAV; the page says a native iPhone app is in development and offers beta registration.phoneblock.net · read 7 Oct 2026
- Landline options
- Landline users can choose a router dongle, a cloud answering machine through Fritz!Box, or a blocklist phonebook synced by CardDAV.phoneblock.net · read 7 Oct 2026
- Open source
- The software is licensed under GPL-3.0.phoneblock.net · read 7 Oct 2026
- Operator
- The imprint identifies PhoneBlock as a private project operated by Bernhard Haumacher.phoneblock.net · read 7 Oct 2026
- PBX/API
- PhoneBlock says phone systems can download the blocklist in various formats or query it through an API; its integration page links a community 3CX project.phoneblock.net · read 7 Oct 2026
- Purpose
- PhoneBlock automatically blocks unwanted advertising and spam calls using a community maintained database.phoneblock.net · read 7 Oct 2026
- Support
- The operator says users can contact him by email for help, including if their number was mistakenly added to the blocklist.phoneblock.net · read 7 Oct 2026
- Website privacy
- The privacy policy says unregistered visitors’ IP addresses are logged temporarily for error analysis and deleted after 14 days; it says the site has no ads or third-party trackers.phoneblock.net · read 7 Oct 2026
