Residential vs ISP vs datacenter proxies comes down to a trade between how ordinary an address looks to a target and how much control, throughput and provenance evidence you get. Datacenter addresses are fastest, cheapest per request and easiest to verify, but many targets recognize them. Residential and mobile addresses look like ordinary users but are billed per gigabyte, rotate unpredictably and carry the heaviest compliance review. ISP addresses sit in between: static, fast and registered to consumer providers.
This guide to residential vs ISP vs datacenter proxies, with mobile alongside, compares the four types on the questions enterprise buyers actually have to answer: where the addresses come from and how you can check it, how they are billed, how sessions behave, how targets treat them, and how much work each creates for a compliance review.
How is each proxy type sourced?
The type of a proxy is defined by who the address belongs to and what device it is attached to. That also determines what evidence a provider can give you about where it came from.
Datacenter proxies
Datacenter addresses come from ranges allocated to a hosting company or to the proxy provider itself, and run on servers in data centers. They are the easiest type to verify: the registrant of a range and the autonomous system (ASN) that announces it are public. A query to the regional registry's RDAP service, defined in RFC 9082, shows who holds the range, and public routing data shows which ASN announces it. A provider that owns its ranges and announces them from its own ASN can be checked in minutes.
ISP proxies
ISP proxies, sometimes called static residential, use addresses registered to consumer internet providers but hosted on the proxy provider's servers. The address looks residential in registry data while the hardware is under the provider's control. The provenance evidence is contractual: the lease or agreement with the ISP, and the authorization under which the range is announced. Registry lookups show the ISP as the holder, so ask for the commercial relationship that connects the provider to it.
Residential proxies
Residential proxies route traffic through real household devices and connections. The legitimate way to obtain them is consent: device owners opt in, usually through a partner app, in exchange for compensation or a service, and can withdraw. The illegitimate ways include malware, bundled installers that never obtain knowing consent, and compromised routers. From the outside the two are indistinguishable, which is why provenance evidence for residential supply is documentary: a published supply-chain policy, the list of acquisition channels, consent records you can sample, and independent audits. Our explainer on IP provenance covers what each document proves.
Mobile proxies
Mobile proxies exit through carrier-assigned 3G, 4G or 5G addresses. Supply comes either from modems with SIM cards operated by the provider, which is straightforward to evidence through carrier contracts, or from consenting peers on phones, which raises the same questions as residential supply. Ask which model a mobile product uses.
How are they billed?
Residential and mobile proxies are almost always billed per gigabyte transferred, because the constraint is peer bandwidth and every byte crosses someone's connection. ISP and datacenter proxies are billed per address per month, because the constraint is the address itself and bandwidth on a server is cheap.
The billing model changes how you optimize. On per-GB pools, every image, retry and uncompressed response costs money. On per-address pools, the cost is fixed and the question is how many requests each address can carry before the target objects. The guide to proxy pricing per GB and per IP works through the arithmetic.
Session behavior and throughput
Datacenter and ISP addresses are static. You get the same address until you release it, which makes long sessions, logged-in workflows and allowlisting simple. Throughput is limited mainly by the provider's servers and upstream capacity, so these types suit high-volume and latency-sensitive work.
Residential addresses can rotate on every request or be held for a sticky session, but a sticky session depends on a real device staying online. When a phone moves off Wi-Fi or a router restarts, the session ends early, and providers differ in whether they fail the request or silently move you to a new address. Throughput per peer is limited by household uplinks. Mobile behaves similarly, with the added factor that carriers reassign addresses on their own schedule. Our guide to rotating vs sticky proxies covers how to design jobs around this.
How do targets treat each type?
Targets classify addresses using registry data, routing data, commercial IP-intelligence databases and their own history of abuse from each range.
- Datacenter ranges are identifiable as hosting space. Some targets block or challenge them outright; many public sites, APIs and documentation portals do not care.
- ISP addresses are registered to consumer providers, so they pass registry-based checks, but a target that sees one address make thousands of requests will still rate-limit it.
- Residential addresses carry the reputation of ordinary households and spread load across many addresses, which is why strict targets tolerate them best.
- Mobile addresses are shared by many real subscribers behind carrier NAT, so blocking one risks blocking many legitimate users. Targets tend to be cautious with them.
Comparison table
| Datacenter | ISP | Residential | Mobile | |
|---|---|---|---|---|
| Address owner | Hosting company or provider | Consumer ISP | Household connection | Mobile carrier |
| Provenance evidence | RDAP and routing lookups | ISP agreements plus registry data | Policy, consent records, audits | Carrier contracts or consent records |
| Billing | Per address per month | Per address per month | Per GB | Per GB |
| Session behavior | Static | Static | Rotating or sticky, ends when a peer drops | Rotating or sticky, carrier reassignment |
| Throughput and latency | Highest, lowest latency | High, low latency | Variable, peer-limited | Variable, carrier-limited |
| Treatment by strict targets | Often challenged | Usually accepted at modest rates | Widely accepted | Widely accepted |
| Can partners allowlist it | Yes | Yes | No | No |
| Compliance review burden | Low | Moderate | High | High for peer-based supply |
Compliance review burden
A security or procurement reviewer's work scales with how far the provider's supply chain is from something they can check themselves.
Datacenter supply is the lightest review: confirm range ownership with a registry lookup and move on. ISP supply adds contract questions about how the provider obtained and announces the ranges. Residential and peer-based mobile supply require the full review: the acquisition channels, what the consent flow tells the device owner, whether consent is compensated and reversible, how the provider excludes minors' devices and compromised hardware, and whether an independent assessor has traced sampled addresses back to acquisition records. The proxy provider due diligence checklist lists the questions in a form you can send.
That burden is not a formality. A top-tier residential provider was seized by federal authorities in July 2026 after its network was found to be built on compromised devices, and its customers' traffic had been exiting through those devices.
Choosing by workload: a decision procedure
The choice between residential vs ISP vs datacenter proxies is made per workload, not once for the company. Work through these steps for each one. Most estates end up using two or three types.
- Does a third party need to allowlist your egress addresses? If yes, use ISP or datacenter. Nothing that rotates can be allowlisted.
- Test the cheapest type first. Run a sample of the real workload on datacenter addresses and validate the content returned, not just status codes. If validated success is acceptable, stop here.
- If datacenter addresses are challenged, try ISP. Registry-based classification is the most common reason for datacenter blocks, and ISP addresses pass it while staying static and fast. This suits account-based work, long sessions and moderate request rates per address.
- If the target limits per address or needs broad geographic spread, use residential. High request volumes against strict targets, many locations, or city-level targeting usually need a large rotating pool.
- If the target is mobile-first or residential is blocked, use mobile. App APIs, mobile ad verification and carrier-specific content are the typical cases.
- Check the cost per successful request, not the list price. A per-GB type with a high success rate can cost less per usable result than a cheap per-address type that fails half the time.
- Run the provenance review proportionate to the type before production traffic flows.
Typical outcomes: price monitoring on tolerant retail sites runs on datacenter or ISP; SEO and SERP tracking across many locations tends toward residential; ad verification on mobile placements uses mobile.
Where ProxyForge fits
ProxyForge sells all four types, each with HTTP, HTTPS and SOCKS5 and either username and password or IP allowlist authentication. Datacenter proxies use dedicated addresses in ranges registered to us and announced from our own ASN, so their provenance can be checked with a registry lookup. ISP proxies are static addresses leased from consumer ISPs, hosted on our hardware and dedicated to one customer. Residential proxies come from consented, compensated peers and rotate per request or stay sticky for up to 60 minutes. Mobile proxies use carrier-assigned addresses, rotating or sticky for up to 30 minutes.
Our sourcing page sets out the permitted and prohibited supply channels and the twice-yearly independent audit. See each product page for current coverage.