PhoneBlock
PhoneBlock: Broad, free spam-call blocking with self-hosting and telephone-system support. Ranked #17 of 40 in Spam Call Blocking Apps by our editors (7.3/10); pricing: Free plan; best for open-source users needing broad deployment options.
At a glance
- Editor score7.3 / 10
- PricingFree plan
- Best forOpen-source users needing broad deployment options
- Free planYes
- Paid fromFree
- Facts checked21 Sep 2026
Where it wins
- Free open-source blocking across phones, web, API, and self-hosting
- Community blacklist updates with automatic known-spam call blocking
- Supports Android, CardDAV, 3CX, PBX, and telephone-system integration
Where it doesn't
- iPhone support currently relies on CardDAV rather than a native app
- Community blacklist coverage depends on reported spam numbers
- Setup can be more involved when using PBX or self-hosted deployment
Our verdict on PhoneBlock
PhoneBlock is a free, open-source spam-call filtering service for individuals using landlines, Android phones, iPhones, and telephone systems. It combines a community-reported blacklist with automatic updates, known-spam call blocking, caller identification, and personal blacklist and whitelist controls. Its deployment options extend from web access and mobile platforms to an API and self-hosted operation, making it suitable for users who want control over how call filtering is delivered.
PhoneBlock’s strongest fit is its breadth across devices and phone systems. Android users can filter calls before the phone rings and review blocked and missed calls in the call history. iPhone users can identify spam callers by synchronizing the blacklist through CardDAV. Telephone-system and PBX support adds a path for broader deployments, while 3CX integration and the API provide additional connection options. Users can also search for and report phone numbers, contributing to the community blacklist.
The product is free of charge and has no paid tier to compare, which keeps access straightforward for individuals and organizations evaluating open-source tooling. The trade-off is that iPhone support currently uses CardDAV synchronization because the native iPhone app is still under development. PhoneBlock is a strong choice for open-source users who need Android, iPhone, landline, PBX, or self-hosted options in one service. Those seeking a native iPhone app should consider an alternative until that experience is available.
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PhoneBlock pricing
PhoneBlock fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Robocall blocking | Not verified |
| Caller ID | Yes |
| Call screening | Yes |
| Community reports | Yes |
| Supported platforms | Both |
| Blocked-number limit | Not verified |
| Deployment | Cloud, Self-hosted, Mobile |
| Platforms | Web, Android, iOS |
| Support | Email, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Integrations | 2 integrations: CardDAV, 3CX |
| Pricing | Free plan |
| Website | phoneblock.net |
| Facts checked | 21 Sep 2026 |
PhoneBlock integrations
PhoneBlock lists 2 integrations on its own site.
- CardDAV
- 3CX
Alternatives to PhoneBlock
- TruecallerA broad caller ID and spam protection app for iOS and Android.9.3
- T-Mobile Scam ShieldA free core service for T-Mobile customers, with paid call-management upgrades.9.1
- Verizon Call FilterA practical Verizon-integrated blocker with useful free protection and paid caller ID.9.0
See all PhoneBlock alternatives →
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Featured on iTechGuides
PhoneBlock is listed in our Spam Call Blocking Apps directory. Add the badge to your site — it links back to this page.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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