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Bot signals — Internet scanner

Synthient measurement scanner IP addresses

Synthient measurement is an internet scanning project in the IPAPI.GR scanner catalogue. Addresses it publishes or verifiably identifies as its own set risk.is_scanner.

risk.is_scanner rDNS Reviewed
All internet scanners

Check an IP

Is this IP really Synthient measurement?

Checks the address against what Synthient measurement publishes, the same evidence behind risk.is_scanner.

Limited public information

Our catalogue has no official documentation page for Synthient measurement, so this page only describes the verification rule below. Addresses are flagged only when that rule matches.

01 — Verification

How IPAPI.GR verifies Synthient measurement.

Only from what Synthient measurement publishes about itself. No third-party blocklists, no behavioural guesses.

Synthient measurement

risk.is_scanner
Method
rDNS Forward-confirmed reverse DNS
Reverse DNS
PTR hostname must end in .scan.synthient.com. The hostname must then resolve forward to the same address.
Refresh
Checked in the background; a new address can become flagged shortly after its first lookup.

02 — In the response

What a match looks like.

A lookup of a Synthient measurement address sets risk.is_scanner. The flags come with geolocation and network data in the same response, for Pro API keys.

The response says which kind of bot an address belongs to, not which operator. Pair it with the user agent: a request that claims to be Synthient measurement but doesn't match is unverified.

GET /api/lookup/{ip}?key=PRO_KEY
{
  // … location and network fields …
  "risk": {
    "is_ai": false,
    "is_crawler": false,
    "is_scanner": true
  }
}

From the blog

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