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Calla

Calla

Stop Spain’s 400 sales calls

Coming soon toApp StoreGet it onGoogle Play
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What it is

Since 17 October 2026 every sales call in Spain comes from a 400 number. Calla blocks them all, for free, with no ads and no account.

Since 17 October 2026, Spanish law requires every company that calls you to sell something to use a number starting with 400. Calla blocks that whole prefix, a million numbers, so those calls never ring. It is free and has no ads.

WHAT CALLA BLOCKS

  • Every sales call from the 400 prefix (Spanish Law 10/2025)
  • Any number you want to block, from Spain or abroad
  • With Pro: whole prefixes and the community spam list

YOU WON’T MISS IMPORTANT CALLS

  • Customer service from your bank, energy company or doctor cannot use 400
  • Exceptions: numbers that must always ring
  • Blocking 400 can be turned off with one tap

TOGETHER, LESS SPAM

  • Report the numbers that bother you: advertising, scam, survey, robot
  • Numbers reported by several people join the community list

PRIVATE

  • No account and no ads
  • Calla never reads your contacts
  • The blocking happens on your phone; your calls are not sent anywhere

HOW IT WORKS

  • iPhone: switch Calla on in Settings › Apps › Phone › Call Blocking & Identification; the phone blocks the calls itself

Blocking the 400 prefix is and will always be free. Calla Pro is a one-time purchase (not a subscription): community spam list, unlimited blocked numbers and blocking whole prefixes. Calla cannot block hidden numbers, and calls from abroad or from companies breaking the law do not use 400.

OFFICIAL SOURCES

Calla is an independent app made by Basel1905 Studio. It is not an official app and is not affiliated with, endorsed by or representing the Government of Spain or any public body.

Terms: https://basel1905.com/calla/terms.html

Privacy: https://basel1905.com/calla/privacy.html

Frequently asked questions

How do I turn Calla on?

iPhone: Settings › Apps › Phone › Call Blocking & Identification, and turn Calla on (the app takes you there). Android 10 or later: open Calla, tap Turn on and choose Calla as your caller ID & spam app.

What is the 400 prefix?

Since 17 October 2026, companies calling you in Spain to sell you something must call from a 9-digit number starting with 400 (Law 10/2025). Customer service from your bank or utilities cannot use 400.

I still get some spam

Calls from abroad or from companies breaking the law don’t use 400. Block those numbers in My blocks, report them so they join the community list, and with Pro turn on Community spam.

A call I wanted was blocked

Add the number to Exceptions: it will always ring. On Android you can do it from the blocked call in History.

Why is there no history on iPhone?

iOS blocks the calls itself and does not tell apps which ones it blocked.

I paid but I don’t see Pro

Settings › Restore purchases, using the same Apple ID or Google account you paid with. If it still doesn’t work, write to us.

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