SMS Duo
1. Sign in
The checks need an account. Every account gets 3 free checks a day (all three tools combined, reset at midnight Beijing time), then $0.01 each from your balance.
Tools
Email, phone and IP risk checks, plus ready accounts
A few handy tools in one place: see how risky an email address, phone number or IP looks before you decide what to do next. Each result is a low / medium / high verdict with a few plain-language reasons, no technical data to read.
Accounts
Ready Accounts
Ready-made account store (AccDuo): social and email accounts, pay from your balance, automatic delivery. Opens in a new tab.
Open the store ↗Risk checkEmail Risk Check
See whether an address can receive mail, looks randomly generated, how old its domain is and whether it has a history.
Check an email →Risk checkPhone Risk Check
Look up the carrier, the line type (mobile / landline / VoIP), whether the number is VoIP or prepaid, plus a risk level.
Check a phone number →Risk checkIP Risk Check
Look up the country, ISP, residential / datacenter / proxy type and whether the address is a known VPN. Your current IP is filled in.
Check an IP →How it works
2. Enter what to check
An email address, a phone number (country code allowed) or an IP address; the IP card fills in your current IP.
3. Read the verdict
You get a low / medium / high risk badge, 2–4 main reasons and the key facts, such as carrier, line type and network type.
FAQ
How accurate are the results?
Results come from third-party data and are for reference only; they are not any platform’s final decision.
Does it cost anything?
Every signed-in account gets 3 free checks a day (all three tools combined, reset at midnight Beijing time). The Tools page shows how many free checks you have left today; after that each check costs $0.01 from your balance. You are only charged when a check succeeds, and we ask you to confirm before your first paid check.
Do you store what I enter?
We only keep a masked copy of the input and the verdict, to count usage. The full input is not stored.
Where are the ready accounts?
The first card on the Tools page links to AccDuo and opens in a new tab.
Run a check now
Sign in, open Tools and choose an email, phone number or IP to check.
Open Tools