Types of Proxies Explained: Residential, Datacenter, ISP and Mobile
Residential, datacenter, ISP, and mobile proxies explained. Learn the four main proxy types, their differences, and which fits your use case.
In the proxy world, there are four main types of proxies, each with an IPv4 and IPv6 variant:
Residential Proxies
Datacenter Proxies
ISP Proxies
Mobile Proxies
1. Residential Proxies
Residential Proxies are real residential IPs belonging to real people. They are obtained through SDKs loaded into consumer applications. Based on user consent, the SDK enables the proxy network to route requests through the device.
They carry true, natural behaviour, so their IP reputation is typically very high, unless the network is oversaturated. A common variant routes through SDKs on mobile devices rather than fixed-line ones; these tend to carry even higher reputation, but they're less reliable in terms of IP lifetime, since mobile carriers are less stable than fixed-line connections.
One thing worth being straight about: how residential IPs are sourced is the most scrutinised issue in this industry, and for good reason. There's a real history of SDKs with buried consent, and of outright criminal networks: Hola/Luminati back in 2015, and the 911 S5 botnet the DOJ took down in 2024 (roughly 19 million IPs harvested through malware-laced free VPNs). Legitimate sourcing and real consent are the line between a residential network and a botnet, so it's worth asking any provider how their pool is sourced.
When to use it: Best for targets with strong bot detection, such as social media platforms, retail sites, and search engines.
2. Datacenter Proxies
Datacenter Proxies are IPs (owned or leased) announced by an Autonomous System recognised as a datacenter. They tend to have the worst IP reputation of the four types, however, they are by far the fastest and cheapest option available.
When to use it: Best for high-volume, low-sensitivity tasks where speed and cost matter more than IP reputation.
3. ISP Proxies
ISP Proxies are IPs hosted on a datacenter but announced by a Residential Internet Service Provider. According to the internet (based on WHOIS data), the IP is recognised as a residential address, which naturally increases its reputation.
These proxies provide datacenter-grade speed, though slightly lower due to ISP peering. They are more expensive than Datacenter Proxies because Residential ISPs charge more for bandwidth, but still far cheaper than any type of Residential Proxy on a per-GB basis.
When to use it: Best when you need datacenter speed but your target is sophisticated enough to block datacenter IPs outright.
4. Mobile Proxies
Mobile Proxies are IPs obtained either through an agreement with a Mobile Carrier or through a physical SIM farm, specifically racks of physical SIMs in modems. They carry the highest IP reputation of any type, partly because carrier-grade NAT means many real users share each IP, so blocking one risks blocking a lot of legitimate customers. The trade-off is that they're by far the most expensive option, and pool sizes are typically too small to support large-scale operations.
When to use it: Best for extremely strict targets where IP reputation is the priority and pool size is not a constraint.
Which Proxy Type Should You Use?
If your target is not heavily protected, start with Datacenter Proxies for maximum speed and the lowest cost.
If your target blocks datacenter IPs, move to ISP Proxies.
If ISP proxies still fail, Residential Proxies are the next step up.
Mobile Proxies are a last resort for the strictest targets, where cost is secondary to trust.
To understand how residential networks actually route your traffic, see How a Residential Proxy Network Works.
Published by Alon Levi, CEO at FlashProxy
About the author: Alon Levi is the CEO of FlashProxy and has extensive experience in proxy infrastructure, network architecture, and large-scale IP routing technologies.
Connect on LinkedIn · Contact: alon@flashproxy.io
Frequently Asked Questions
What is the difference between residential and datacenter proxies?
Residential proxies use real IPs assigned to home internet connections, making them harder to detect. Datacenter proxies use IPs from server infrastructure, which websites can identify and block more easily. Datacenter proxies are significantly faster and cheaper.
Which proxy type is best for web scraping?
It depends on the target. Datacenter proxies work for most sites. ISP proxies offer a good balance for stricter targets. Residential proxies are best for heavily protected sites that actively block datacenter and ISP IP ranges.
What is an ISP proxy?
An ISP proxy is hosted on datacenter hardware but uses IP addresses registered to a residential internet service provider. This gives it datacenter-grade speed with a residential-level IP reputation.
Which proxy type is the cheapest?
Datacenter proxies are by far the cheapest, followed by ISP proxies. Residential and mobile proxies are significantly more expensive due to the infrastructure required to source and maintain real consumer device IPs.
Sources & References
U.S. Department of Justice, 911 S5 botnet dismantled (May 29, 2024): https://www.justice.gov/archives/opa/pr/911-s5-botnet-dismantled-and-its-administrator-arrested-coordinated-international-operation
Peakhour, residential proxy detection and sourcing challenges: https://www.peakhour.io/blog/residential-proxies-unseen-challenges/
