KinvoKinvoFree tool
Paste any international phone number to instantly check the country, scam risk score, line type, call cost, and whether they're awake — free, private, no signup.
Missed call? Unknown number? Paste it here.
Wangiri scams (Japanese for “one ring and cut”) are the most common phone scam worldwide. You get a missed call from an unfamiliar international number. You call back. You are connected to a premium rate line that charges $1 to $5 per minute — and the longer they keep you on hold, the more you pay. This tool checks for known scam corridors, premium prefixes, and suspicious number formats before you dial.
The tool checks multiple risk signals: whether the number comes from a country frequently used for callback scams, whether it matches known premium-rate prefixes, whether the number format is valid for that country, and whether the number length is suspiciously short. Each flag adds to the risk score. A score under 20 means low risk. 20 to 40 means proceed with caution. Above 40 means do not call back.
If you do decide to call back, your mobile carrier will likely charge $0.25 to $3.00 per minute for international calls — even with an international add-on. Browser-based VoIP services like Kinvo route calls over the internet, bypassing carrier infrastructure entirely. The same call that costs $1.50/min with your carrier costs $0.01 to $0.15/min with Kinvo. This tool shows both prices side by side so you can see the difference before you dial.
Scam risk score
Checks for Wangiri scam origins, premium-rate prefixes, invalid formats, and suspicious number lengths. Gives a 0-100 risk score.
Country of origin
Identifies the country from the dialing code — handles all 200+ country codes including territories.
Line type
Detects whether the number is a mobile phone, landline, VoIP line, toll-free, or premium rate number.
Carrier cost vs. Kinvo
Shows your estimated carrier rate alongside the Kinvo rate — so you see exactly how much you can save.
How to dial from your country
Detects where you are and shows the exact dial string — including the exit code for your country.
"Will they pick up?" score
Checks the local time and day of week at the recipient's location. Factors in lunch breaks, weekends, and sleeping hours.
Quick actions
One-click call with Kinvo, open in WhatsApp, or download as a contact (.vcf) to save to your phone.
No. Everything runs in your browser using JavaScript. The number never leaves your device. There is no API call, no logging, and no tracking of the numbers you enter.
Wangiri means "one ring and cut" in Japanese. Scammers call your number and hang up after one ring, hoping you will call back. The return number connects to a premium rate line that charges $1 to $5 per minute. Common origin countries include Mauritania (+222), Tunisia (+216), and several Pacific island nations.
The score is based on known risk patterns — premium prefixes, Wangiri origin countries, and format anomalies. It catches the most common scam types but cannot detect all fraud. A low score does not guarantee the caller is legitimate. When in doubt, do not call back.
Mobile carriers route international calls through legacy telephone infrastructure, which involves per-minute fees at every hop. VoIP services like Kinvo route calls over the internet using WebRTC, which costs a fraction of the price. The carrier estimates shown are based on published rates from major US, UK, and EU carriers.
The tool works best with a country code (e.g., +1 for US, +44 for UK). Without one, it tries to guess but results may be inaccurate. Always include the + and country code for reliable results.