An ISP proxy (also called static residential) is a residential IP — one registered to an ISP — that is hosted on a datacenter server rather than a real home device. The short version: it combines the trust of a residential IP with datacenter-grade speed, uptime, and the ability to hold the same IP for a long time, which is exactly what you want when a task needs to keep hitting a target from one steady vantage point. This comparison is built on each vendor's documented terms (July 2026, all prices in USD).
Key takeaways
- ISP proxies (static residential) serve ISP-registered residential IPs from datacenter infrastructure, combining residential trust with datacenter stability and speed.
- Where rotating residential routes through real devices and cycles IPs, an ISP proxy holds one IP for a long time, always on and fast.
- Billing is usually per IP or by subscription, on a different axis from the per-GB pricing of rotating residential (check each provider's official page for current ISP rates).
- They fit work that needs a steady, same IP: consistent-vantage ad verification, ongoing brand and SEO monitoring, stable access to accounts you legitimately own, and market research.
- This is a documented comparison — we have not run our own benchmarks, and every performance figure is a vendor claim. We do not use these for mass account creation, ban evasion, or resale.
What an ISP proxy is (how static residential works)
Proxies fall into three broad families: residential (real home connections), datacenter (datacenter IPs), and ISP / static residential, which sits in between. An ISP proxy's IP is registered to an ISP (a residential ASN), so targets see it as a home connection and trust it — but it actually runs on a datacenter server. That structure avoids the weaknesses of device-based rotating residential (variable speed, changing IPs) and lets you hold one IP for a long time, fast and always on. For the fundamentals see what a residential proxy is, and for the contrast with datacenter IPs see residential vs datacenter proxies.
How we evaluate this comparison
ProxyFacts has not yet run its own benchmarks of ISP / static residential proxies. Until it does, this comparison is built strictly on documented evidence: vendor pricing pages, product documentation, and compliance policies, all fetched and re-verified on July 17, 2026, plus independent industry research where available. Performance figures such as success rates are labeled as vendor claims throughout, and we treat our own residential price data as the single source of truth. ISP-specific pricing is marked "check the official page," because vendors update it independently. ProxyFacts is monetized through disclosed affiliate partnerships; those partnerships never change which numbers we report. Advertised pool sizes are ceilings, not guarantees: Proxyway's 2026 research puts the median advertised residential pool at 54M IPs.
Residential vs ISP vs datacenter at a glance
| Dimension | Residential (rotating) | ISP (static residential) | Datacenter |
|---|---|---|---|
| IP origin | Real home connections via real devices | ISP-registered IPs hosted in a datacenter | Datacenter IPs |
| Trust (detection resistance) | High (real home IPs) | High (ISP-registered, looks residential) | Lower (datacenter ASN is easier to flag) |
| Stability and speed | Device-dependent, variable | Always on, fast, holds one IP for a long time | Fast and stable |
| Billing axis | Per GB (metered) | Mostly per IP or subscription | Per IP or bandwidth; cheapest of the three |
| Price trend | About $4.00/GB, into $2.00/GB at volume | Higher than datacenter (verify on official pages) | Cheapest of the three |
| Typical use | Large-scale public-data collection | Ongoing monitoring and legitimate account access needing a steady IP | Fast collection from lightly defended targets |
Engineer's take (Hinata): The deciding question for ISP proxies is not speed or price but whether you need to keep the same IP. For one-off scraping, cheaper rotating residential or a scraping API usually wins on effective cost. ISP earns its premium only when you need to observe continuously from one fixed vantage — checking how an ad renders from the same region and IP every day, for example. In practice I decide first whether the job genuinely requires a static IP, and add ISP only when it does.
How the four providers cover ISP / static residential
The four providers whose prices anchor this article all offer residential as their core product and carry an ISP / static residential tier. ISP-specific pricing varies and changes fast, so confirm current terms on the official page. Here are their residential entry terms (July 2026, USD):
- Oxylabs: Residential starts at 5 GB for $30 ($6/GB), with the most granular geo targeting (down to coordinates and ASN). Member of the Ethical Web Data Collection Initiative. See the Oxylabs review.
- Bright Data: Residential is $4.00/GB pay-as-you-go, with a claimed 400M-plus IP pool and the industry's strictest KYC (verified, registered companies only). See the Bright Data review.
- Decodo (formerly Smartproxy): Residential is $4.00/GB pay-as-you-go, cheapest entry at 3 GB for $11.25, with a 3-day trial plus 14-day money-back — the best terms for evaluation. See the Decodo review.
- IPRoyal: Residential is $7.35/GB with non-expiring traffic and sessions up to 7 days; its static residential (ISP) tier requires KYC. See the IPRoyal review.
To compare the residential plans side by side, start from the pillar, best residential proxies, and proxy pricing comparison.
Strengths of ISP proxies
- ISP-registered IPs carry high residential trust
- Always on and fast, holding one IP over long periods (static)
- Fit steady-vantage monitoring and legitimate account access
Weaknesses of ISP proxies
- Smaller pools and higher unit price than rotating residential
- Per-IP / subscription billing is cost-inefficient for one-off bulk collection
- Being static, they are wrong for jobs that need to spread across many different IPs
Choosing by use case
When you want to check ad placement, brand presence, or search rankings from the same region and the same IP every day, an ISP proxy's non-rotating IP fits — a fixed vantage makes changes easier to detect accurately. See proxies for ad verification and proxies for SEO monitoring.
The cost angle: fit over sticker price
ISP proxies are mostly billed per IP or by subscription, a different axis from rotating residential's per-GB rate. A cheap-looking plan wastes its fixed per-IP cost if you use it for one-off bulk work, while continuous monitoring — reusing a few IPs — makes it cheap. So the economics turn on whether you genuinely need a static IP, not on the headline price. To evaluate residential on a budget first, see cheapest residential proxies; for the hidden cost of "free," read free vs paid proxies.
Compliance and sourcing ethics
The legitimate uses for ISP proxies are public-data monitoring, ad verification, market research, and stable access to accounts you legitimately own. Not hijacking or mass-creating others' accounts, ban evasion, resale or sneaker bots, paywall bypass, or collecting personal data — every major provider prohibits these, and IPRoyal applies KYC to its static residential tier. Free or extremely cheap proxies can route through devices whose owners never consented and carry serious safety risks, so our reasoning for choosing providers that can account for their IP origin is in ethical proxy sourcing. This article is not legal advice; for the legal questions around collecting public data see is web scraping legal, and consult a lawyer for your specific case.
Verdict: should you choose ISP proxies?
Bottom line
Oxylabs
The most granular geo targeting, and the option when you need steady-vantage monitoring at scale
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Decodo
A 3-day free trial and 14-day money-back guarantee let you first test, at low risk, whether your use case needs a static IP
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