ipapi.gr

Bot signals — Internet scanner

VisionHeight scanner IP addresses

VisionHeight 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 FeedRangesrDNS Reviewed
Official documentation (opens in a new tab) All internet scanners

Check an IP

Is this IP really VisionHeight?

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

01 — Verification

How IPAPI.GR verifies VisionHeight.

Only from what VisionHeight publishes about itself. No third-party blocklists, no behavioural guesses. Live address counts change with every publication, so check the official file for the current list.

VisionHeight

risk.is_scanner
Method
Feed Operator IP feed
Method
Ranges Published IP ranges
Method
rDNS Forward-confirmed reverse DNS
Official file
Format
Operator IP feed
Reverse DNS
Exact hostnames: scan.visionheight.com. The hostname must then resolve forward to the same address.
Networks
Ranges the project publishes or has registered for scanning, reviewed into the scanner catalogue.
Refresh
Every hour. If a refresh fails, entries expire after 24 hours instead of being trusted forever.

02 — In the response

What a match looks like.

A lookup of a VisionHeight 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 VisionHeight 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
  }
}

03 — Questions

About VisionHeight.

Does VisionHeight publish its scanner IP addresses?

Yes. VisionHeight publishes a list at https://www.visionheight.com/scan, which IPAPI.GR imports directly.

How do I verify VisionHeight with reverse DNS?

Look up the PTR record for the IP address. The hostname must be one of scan.visionheight.com, and a forward lookup of that hostname must return the same IP address. A PTR record alone can be set by anyone who controls the address, so the forward confirmation is the part that matters.

How often is the VisionHeight list refreshed?

IPAPI.GR re-fetches it every hour. If a refresh fails, the previous entries expire after at most 24 hours instead of being trusted forever.

Which risk flag does VisionHeight set?

A matching address sets risk.is_scanner in the lookup response. The risk flags are returned for Pro API keys.

From the blog

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