IPinfo

IPinfo is an IP address intelligence platform that serves developers, security teams, and enterprises with verified geolocation data, VPN and proxy detection, abuse contact information, and network routing details. Unlike simple IP checkers, IPinfo is built as an API service with multiple pricing tiers, each providing different depths of IP intelligence depending on your needs. The platform powers over five hundred thousand users ranging from individual developers to Fortune 500 companies, processing over forty billion API requests monthly, which means its data quality is tested at massive scale and continually refined.

The core use case for proxy users is verification and detection. IPinfo provides geolocation data that breaks down to city level rather than just country, which means you can check whether a proxy is correctly routing traffic from the claimed geographic location. If you buy a proxy labeled as coming from Toronto, you can verify that the IP's geolocation is indeed Toronto rather than somewhere else. The platform also provides ASN (Autonomous System Number) data that identifies which provider operates the IP, revealing whether the IP is associated with a residential ISP, a mobile carrier, a datacenter, or known proxy infrastructure. This is crucial because many proxy detection systems rely on ASN databases to identify and block proxy traffic, so knowing what ASN your proxy belongs to tells you how easily it can be detected.

IPinfo's VPN and proxy detection is its most valuable feature for proxy testing. Rather than simply classifying an IP as datacenter or residential, IPinfo maintains databases of known VPN provider IP ranges and proxy services. If your IP is already listed as a known proxy or VPN service, IPinfo will flag it, which means that service is likely to detect and block it. This early warning is important if you are considering buying proxies from a provider and need to know whether they have already been burned by previous customers and listed on detection blacklists. The platform also detects Tor exit nodes and identifies residential proxies with enough accuracy that you can make decisions about whether an IP meets your requirements before you commit to purchasing it.

The platform offers both a free tier and paid subscriptions, with pricing starting at forty-one dollars per month for the Core plan. The free tier provides unlimited web-based lookups but with country-level geolocation only and no VPN or proxy detection. The Core plan adds city-level geolocation, VPN and proxy detection, and one hundred fifty thousand monthly API requests. The Max plan at one hundred thirty dollars per month includes everything in Core plus residential proxy detection and service names, along with two hundred fifty thousand monthly API requests. Enterprise plans offer custom request limits and features. The pricing is straightforward, and overages beyond your monthly limit are charged at per-request rates, so you know exactly what you will pay.

What makes IPinfo particularly valuable compared to free IP checkers is the consistency and coverage of its data. The platform maintains its own geolocation database built from real-world observation of IP routing behavior and Maxmind GeoIP data, which means it catches edge cases that simpler databases miss. If an IP has been reallocated or moved to a different geographic region, IPinfo's database reflects this more quickly than competitors because it processes that information continuously. For proxy users, this means when you check an IP on IPinfo, the results are more likely to reflect reality than results from a free tool.

The API quality and documentation make IPinfo particularly useful for developers and infrastructure teams building proxy-checking into their applications or monitoring systems. The API returns structured JSON with all the IP data you need, and the documentation explains exactly what each field means and how to use it. Response times are fast, typically fifty to two hundred milliseconds even during peak traffic, because IPinfo operates a network of over one thousand monitoring points that observe IP routing behavior globally. This distributed architecture means you get consistent results regardless of where you are checking from.

Whoer's blacklist checking features are complemented by IPinfo's abuse contact data. IPinfo provides the abuse contact email and phone number for each IP's network operator, which is useful if you need to report a problem with an IP or contact the provider. This metadata comes from WHOIS records and is maintained to be current, so you can actually reach someone if an IP is causing problems or needs investigation.

For proxy managers and infrastructure teams, IPinfo's mobile carrier identification is particularly useful. If you are selling mobile proxies, IPinfo will identify which carrier an IP belongs to, which tells you whether the IP is actually from a mobile network or whether someone is selling datacenter IPs fraudulently labeled as mobile. The platform can also identify satellite internet connections, which are another distinct category of IP that behaves differently from standard residential or mobile traffic.

The platform's design reflects its use as a back-end service rather than a consumer tool. There is no dashboard showing you pretty charts or aggregated statistics, just your raw IP data presented clearly. This is appropriate for the audience: developers and risk teams who want the data and do not need marketing framing. If you need the data programmatically, the API is straightforward and well-documented. If you need to check a single IP quickly, the web interface is fast and clear.

The limitations of IPinfo are that it remains a detection tool rather than a masking tool. IPinfo can tell you whether an IP will be detected as a proxy, but it cannot hide that IP from detection. If an IP is listed in IPinfo's proxy database, services that use IPinfo to detect proxies will block it. This is not IPinfo's fault, it is the nature of the game: if a proxy IP becomes known, it becomes detectable. What IPinfo provides is early warning so you know before you use it.

IPinfo is best suited for infrastructure teams and developers who need accurate, detailed IP information they can integrate into their systems. If you maintain a proxy farm and need to verify that each IP's geolocation and ASN match what your upstream provider claims, IPinfo's API makes this easy to automate. If you are buying proxy services and need to verify that the IPs you are getting are actually from the geographic regions and carriers they claim, IPinfo gives you the tools to check. For individual users who just want a quick IP check before buying a proxy, the free tier suffices for basic geolocation, and the paid tiers provide deeper analysis if you are checking multiple IPs regularly.