Fraud/Toll Check

Fraud/Toll Check

Check whether a number falls into a known high-risk range (satellite ranges, small island NANP codes commonly abused for International Revenue Share Fraud, and similar) before you dial or text it — a lightweight early-warning check, not a full fraud investigation. Try it free with no login at 6xcom.com/fraud-check.

POST /api/v1/fraud/check

Example request

curl -X POST https://app.6xcom.com/api/v1/fraud/check \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"number":"+870772123456"}'

Response — high-risk match

{
  "number": "+870772123456",
  "high_risk": true,
  "matches": [
    {
      "prefix": "870",
      "label": "Inmarsat (satellite)",
      "reason": "Satellite range - rarely legitimate, common IRSF vector"
    }
  ]
}

Response — no match

{
  "number": "+447936508801",
  "high_risk": false,
  "matches": []
}

What this is — and isn't

This checks a number's prefix against 6X's own maintained watchlist of ranges known for toll fraud, satellite premium rates, and similar abuse patterns — the same list our internal fraud monitoring uses. A "no match" result means the number isn't on that watchlist; it is not a guarantee the number is safe, and a "high risk" match doesn't mean the specific number you checked is definitely fraudulent — it means the range it falls in commonly is. Use it as one signal among others (e.g. combine with Number Lookup and your own usage patterns), not as a sole automated block/allow decision for anything high-stakes.

Billing

Free — this is a local table lookup with no carrier involved, so there's no cost to pass on.

Error codes