Fast, accurate IP proxy detection for open internet proxies and commercial residential proxy connections. Millions of proxy IPs in our database, updated daily to keep pace with high-churn residential networks.
IP Trust IP proxy detection identifies whether an IP is acting as a proxy server, classifies it as open or residential, and tracks when proxy activity was last observed.
| JSON Field | Description | Plans |
|---|---|---|
| { | ||
| "proxy": { | ||
| "detected": true, | Whether this IP has been detected as an active proxy server. | Premium |
| "type": "residential", | optional Type of proxy, one of:
|
Premium |
| "last_detected": "2025-11-15" | optional Date (ISO 8601) when proxy activity was last observed for this IP, if available. | Premium |
| } | ||
| } |
| Field | Value | Description | Database Package |
|---|---|---|---|
| proxy | true | Whether this IP has been detected as an active proxy server. | Anonymisation |
| proxy_type | residential | Type of proxy: residential (commercial residential proxy provider) or open (publicly accessible proxy server). | Anonymisation |
| proxy_last_detected | 2025-11-15 | Date (ISO 8601) when proxy activity was last observed for this IP. | Anonymisation |
Identify traffic routed through open and residential proxies to prevent abuse, protect transactions, and enforce access policies.
Detect automated traffic hiding behind rotating residential proxies. Proxy networks are a primary tool for web scraping, credential stuffing, and sneaker bots that cycle through millions of IPs to avoid detection.
Identify proxy-based click fraud and impression fraud before it impacts your ad spend. Residential proxies are commonly used to simulate real user behaviour across different geographic locations.
Flag login attempts and account sign-ups originating from known proxy IPs. Use proxy detection alongside geolocation to identify suspicious sessions and trigger additional verification steps.
IP Trust sources open internet proxies and residential proxy IPs from top providers. We store millions of proxy IPs in our database, updated daily.
We scan lists of open internet proxies and actively source IPs from commercial residential proxy providers. This dual approach covers both traditional open proxies and the harder-to-detect residential proxy networks used by sophisticated attackers.
Residential proxy IPs rotate constantly, with providers cycling through millions of addresses. We provide a last-detected date with every proxy record so you can make an intelligent call on whether a flagged IP is still active or has rotated out of use.
Our database contains millions of known proxy IP addresses covering both IPv4 and IPv6. We continuously expand our coverage as new proxy services emerge and existing providers grow their networks.
Choose the integration model that works best for your use case.
| Network | Proxy | Proxy Type | Last Detected |
|---|---|---|---|
| 2.36.214.116/32 | true | residential | 2026-01-22 |
| 104.16.54.163/32 | true | open | 2026-02-18 |
| 68.224.116.63/32 | true | residential | 2026-02-20 |
| 185.159.156.28/32 | false | ||
| 89.187.162.0/24 | false |
IP Trust's IP proxy detection identifies two types: open proxies (publicly accessible proxy servers on the open internet) and residential proxies (IPs sourced from commercial residential proxy providers like Bright Data or Oxylabs). Residential proxies are significantly harder to detect because they use real ISP-assigned IP addresses, making them a preferred tool for sophisticated attacks.
Send any IPv4 or IPv6 address to the proxy detection API and receive a JSON response indicating whether a proxy was detected, the proxy type (open or residential), and the date proxy activity was last observed. The API responds in under 100ms and is available on the Premium plan. Integration takes minutes in any programming language.
IP Trust's IP proxy detection tracks millions of known proxy IP addresses across both IPv4 and IPv6. We actively source IPs from commercial residential proxy providers and scan for open proxies on the internet. The database is updated daily to keep pace with the high churn rate of residential proxy networks, where IPs rotate constantly.
Yes. Proxy detection is included in the Anonymisation database package, available in MMDB, CSV, JSON, and Parquet formats. Downloading the database lets you run proxy detection locally with zero external API calls, unlimited volume, and maximum privacy. See our database downloads page for details.
IP proxy detection identifies connections routed through open internet proxies and commercial residential proxy networks, while VPN detection identifies connections through commercial VPN services like NordVPN or Surfshark. An IP can be flagged for both. IP Trust provides separate detection for proxies, VPNs, and Tor, giving you granular control over how you handle each type of anonymous traffic.