fraudip

Check an address before you trust it.

Reverse DNS, seven blacklists and MaxMind geolocation in one pass. The score is explained point by point, so you can disagree with it.

IPv4 or IPv6. Private, loopback and reserved ranges are rejected.

Try

Reverse DNS

PTR records, plus a forward lookup to confirm the name actually points back. An unconfirmed PTR is treated as weak evidence.

Blacklists

Spamhaus ZEN, SpamCop, Barracuda, S5H, DroneBL, the Tor exit list and SpamSources. Timeouts and refused queries are reported, not hidden.

Network and location

MaxMind City, ASN and Anonymous IP databases, read locally. No address is sent to a third-party geolocation API.

Use the API

Same data, no browser required. The public endpoint is rate limited per address and per session.

Responses include a rate object with the remaining budget and reset time.

curl -s https://fraudip.com/api/lookup/8.8.8.8 | jq

{
  "ip": "8.8.8.8",
  "risk": {
    "score": 12,
    "grade": "A",
    "label": "Low risk",
    "confidence": 0.95
  },
  "signals": [ ... ],
  "blacklists": { ... }
}