Spam Prevention
How to reject spam calls with Android CallScreeningService
Use Android CallScreeningService to reject spam calls: the manifest, the role request, onScreenCall and respondToCall, with Kotlin code.
7 min read
CallerAPI articles
Live notes on spam number lookup, call blocking, and caller ID for people who run voice traffic.
Spam Prevention
How to block spam calls in Asterisk and FreePBX
Block spam calls in Asterisk two ways: a blacklist in the dialplan for numbers you know, and an AGI risk check for the ones you don't. With full config.
9 min read
Spam Prevention
Spam call detection API: how to screen calls with code
Use a spam call detection API to check each caller's number, read a 0 to 100 score and set your block threshold. Steps and code in curl, Python and Node.
8 min read
Robocalls
UK scam calls one year on: Ofcom traceback, SIM farm arrests and O2 blocking
Ofcom is trialling scam call traceback with 1 to 2 working day deadlines, SIM farms are a crime and O2 blocks scam calls. What it means for UK providers.
11 min read
Spam Prevention
How to block spam calls before your voice AI agent answers
How to block spam calls before your voice AI agent answers: look up the caller's number in your answer webhook, then reject or connect the call.
10 min read
Robocalls
Mandatory call blocking in Europe: Sweden, Italy, Spain and the UK
Sweden makes carriers block spam and scam calls on traffic data, Spain has a 400 prefix, and Italy and the UK fine number holders. CLI spoofing explained.
7 min read
Robocalls
Robocall Mitigation Database removals: Nov 4 has passed
The FCC removed Digital Solutions from the Robocall Mitigation Database. Direct traffic had to stop by Oct 7, and the blocking deadline is Nov 4.
10 min read
Caller ID
How to check your caller ID name (CNAM)
How to check the caller ID name on your business number: test calls on other carriers, your provider's record, how updates travel, and fixes.
7 min read
Spam Prevention
Do Not Originate list vs spam feed: what each blocks
Every US provider must block on a do not originate list since December 15, 2025. The list cannot hold valid numbers under complaint. Here is the gap and how to close it.
4 min read
Partnerships
CallerAPI joins Scam.org: expands its coverage to 195 countries
CallerAPI expands the phone intelligence coverage of Scam.org to 195 countries. The government of Fiji already adopted the solution to combat scam calls.
3 min read
Spam Prevention
Spam phone number lookup: how to read a live complaint record
A spam phone number lookup is only useful if you can see the complaint, the subject, and how fresh it is. Here is the 19 September 2026 US snapshot and how to read it.
3 min read