What Is a Datacenter Proxy?

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A datacenter proxy is an IP address that lives inside a commercial cloud or hosting company — AWS, GCP, Azure, DigitalOcean, OVH, Hetzner. Instead of routing your request through someone's home internet, it routes through a server in a data center. The upside: it is cheap (~$0.50–$1.50/GB), fast (sub-100ms response from major regions), and comes with unlimited bandwidth. The downside: it is the least trusted proxy type. Every major anti-bot (the software a site uses to spot and block automated traffic) keeps a blocklist of known datacenter network ranges — identified by their ASN, the ID number assigned to a block of IPs owned by one operator — and flags this traffic before the request ever reaches the site. Use them for unprotected public APIs and academic targets. For anything guarded by a real anti-bot, the cost savings vanish because your success rate collapses.

Trust score	Very low — flagged on sight by major anti-bot vendors
Typical cost	~$0.50–$1.50/GB — cheapest proxy type
Speed	Highest — direct datacenter routing, ~50–100ms
Detection mechanism	ASN-based blocklists (AWS, GCP, Azure, DO, OVH, Hetzner all known)
Best for	Unprotected APIs, academic targets, large static-HTML sites

How datacenter IPs are detected

Three checks fire before the page even loads:

ASN lookup at the CDN edge. An ASN is the ID for a block of IPs owned by one operator; the CDN edge is the server that handles your request first, before it reaches the real site. Major anti-bot vendors keep comprehensive lists of hosting-provider ASNs (AS16509 AWS, AS15169 GCP, AS8075 Azure, AS14061 DigitalOcean, plus OVH, Hetzner, Linode, Vultr, etc.). AWS WAF specifically maintains the HostingProviderIPList with ASN-based inclusion. Match → blocked.
Published cloud subnets. A subnet is just a chunk of IP addresses. AWS, GCP, and Azure publish their public IP ranges as official JSON feeds. Anti-bot vendors pull these in directly and update their blocklists in near real time.
Reverse-DNS pattern matching. Reverse DNS turns an IP back into a hostname. Many datacenter IPs answer with names like ec2-54-83-... or compute-1.amazonaws.com. Even if a request clears the ASN check, that hostname still gives the IP away.

One widely-cited figure: roughly 99% of traffic from known datacenter ranges is bot traffic. So a site can block on ASN knowing that the false-positive rate (a real user who happens to come from AWS) is effectively zero.

When datacenter proxies are actually fine

Datacenter is the right tool when:

The target has no anti-bot at all. Public APIs, government open data, academic sites, and large static-content sites that simply do not care about scraping.
The target is your own infrastructure. Checking your own production endpoints from another region, geofence testing, or load testing — datacenter works because your own systems do not block it.
You can authenticate. Once you hold an API token, the ASN check usually falls away because authenticated requests are trusted differently. Datacenter is fine for authenticated API integrations.
You are testing. Burning cheap IPs to size up a target before you commit to a residential budget.

Anywhere else — behind any real anti-bot system — datacenter gets blocked almost instantly, no matter how perfect your TLS fingerprint (TLS is the encryption layer behind https, and its handshake leaves a recognisable signature) is.

The proxy ladder by trust

Proxy types form a ladder from cheapest/least trusted up to most trusted/most expensive:

Datacenter — ~$0.50–$1.50/GB. Unprotected targets only.
ISP / static residential — ~$1.50–5/IP/month. Datacenter hardware that is announced to the internet under residential ASNs, so it looks like a home connection. Multi-request trust scoring rewards them.
Residential — ~$3–10/GB. Peer-to-peer networks of real consumer devices. The default choice for general anti-bot work.
Mobile / 4G–5G — ~$10–15/GB. Real carrier IPs sitting behind carrier-grade NAT (many phones share one IP, so blocking it would hit innocent users), which earns the highest trust score. For the hardest anti-bot targets.

Rule of thumb: match proxy cost to target difficulty. Spending mobile-tier money on an unprotected academic dataset is waste; using datacenter on a protected retail site is also waste — every request fails.

Code example

python

# Datacenter is fine when there's no anti-bot. Confirm first.
from curl_cffi import requests

# 1. Cheap sanity check: does the target even care about my IP?
r1 = requests.get(
    "https://target.com/api/public",
    impersonate="chrome131",
    proxies={"https": "http://user:pass@datacenter-proxy:port"},
)

if r1.status_code == 200 and "challenge" not in r1.text.lower():
    # No anti-bot detected, datacenter is fine, save money
    print("Datacenter OK, proceeding")
else:
    # Anti-bot detected — escalate to residential or ISP
    r2 = requests.get(
        "https://target.com/api/public",
        impersonate="chrome131",
        proxies={"https": "http://user:pass@residential-proxy:port"},
    )
    print("Escalated to residential:", r2.status_code)

Related terms

What Is a Residential Proxy?

A residential proxy sends your web traffic through a real home internet connection — a regular broadband or fiber line — instead of through …

What Is a Mobile Proxy?

A mobile proxy sends your scraper's requests out through real 4G or 5G mobile-carrier IP addresses — networks like T-Mobile, Vodafone, O2, a…

What Is an ISP Proxy?

An ISP proxy (also called a \"static residential\" proxy) is a fixed IP address that physically sits in a datacenter but is registered to a …

What Is Proxy Web Scraping?

Proxy web scraping means sending your scraper's traffic through proxy servers — middleman machines that forward your requests for you — so t…

What Is Residential Proxy Detection?

Residential proxy detection is how anti-bot systems spot traffic that is being routed through a residential proxy pool — a network of IP add…

What Is IP Rotation?

IP rotation is the practice of cycling outgoing requests through a pool of many IP addresses instead of sending them all from one. Rather th…

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Frequently asked questions

Why does AWS get flagged so hard?

Because running a bot on AWS costs almost nothing extra — scrapers, vulnerability scanners, and abusers all live there. Anti-bots see steady bot traffic from AWS ranges and assume any new request from that range belongs to the same crowd. AWS WAF's own HostingProviderIPList includes all known hosting-provider ASNs on exactly this basis.

Can I get unflagged datacenter IPs?

Some providers sell "premium" or "private" datacenter IPs that sit outside the well-known ASN ranges. They work for a while, but eventually the range gets identified and added to blocklists. By then the cost-per-success ends up similar to residential, so the value is weak.

What about ISP proxies — aren't those datacenter too?

Physically, yes — the same server hardware. The difference is how the IP is announced to the internet. ISP proxies are announced under consumer ISP ASNs (Comcast, BT, Deutsche Telekom) via BGP, the routing system that tells the world who owns which IPs. So anti-bots see "Comcast residential" instead of "AWS datacenter". Same hardware, different network announcement — and that is the whole point of the ISP proxy product.

When does a datacenter IP get noticed even on an unprotected site?

At very high volume. A single IP firing 500+ requests per minute is trivially caught by any rate-limit logic, no matter how trusted it otherwise is. The advantage of higher-tier proxies is not just trust but the larger pool of IPs, which lets you spread requests out and stay under any single IP's rate limit naturally.

Last updated: 2026-05-31