Getting blocked feels personal, and it almost never is. A site that turns your address away has usually decided something about the address itself, not about you, and it decided it in the first millisecond of the request by reading records that have nothing to do with what you came to do. Once you know which record tripped, the fix is usually obvious. We run a proxy network and FFraud, an IP-intelligence engine that scores addresses for the same signals these sites read, so this guide names the three things that get an address blocked, shows you how to tell which one hit you, and covers what actually clears it.
Why is my IP blocked?
An IP gets blocked for one of three reasons: it belongs to a hosting provider instead of a home ISP and reads as a server, it is on a blocklist or carries abuse reports so its reputation is already bad, or it made too many requests too fast and tripped a rate limit. The first two are about who the address is, the third is about what it did. Everything below is a version of one of those three.
The three reasons a site blocks an address
It reads as a data center, not a home. Every address belongs to a network, and that network is public. If yours resolves to a hosting company such as AWS, Google Cloud, or a cheap VPS provider, a defended site treats it as suspect on sight, because ordinary people do not browse from server racks. This is the most common reason a VPN or a cheap proxy gets blocked while your normal home connection does not, and we walk the full detection stack behind it in how websites detect proxies.
Its reputation is already spent. Separate from where the address lives, a site checks what the address has done. Public blocklists record addresses reported for spam or abuse, fraud databases record ones tied to attacks or scraping, and a scoring engine rolls those into a risk number. A high number means a block before you send anything real. The painful part is that reputation is shared by range: a blocklist often lists a whole block, so a neighbor you do not control can get your address flagged. That shared-reputation trap is the whole subject of what a clean IP actually is.
It behaved like a machine. The third reason has nothing to do with reputation. One address pulling hundreds of requests a second, always hitting data URLs, never loading an image or pausing, trips a rate limit or a bot rule no matter how clean it started. This is the one a new proxy will not fix, because the pattern, not the address, is the problem. How to avoid IP bans while scraping covers the request discipline that prevents it.
How to tell which one hit you
Before you reach for a fix, find out what kind of block it is. Two checks settle it in a minute.
First, is it the address or the account? Open the site in a private window while signed out, then try it over a different network, mobile data is the easy one. Loads elsewhere but not on your connection means the block is on your IP or its range. Fails everywhere even signed out points at the account instead, and no proxy will help with that.
Second, read what the address looks like to a site. Run it through our proxy checker to see the network and country a site reads from it, and through FFraud to see the risk score and whether it is classed as a known proxy or VPN exit. If the checker shows a hosting range or FFraud returns a high score, you have found the cause: the address is dirty before it does anything. If both come back clean and you are still blocked, the trigger was behavior or the account.
The common site-specific blocks, and what sets them off
Different sites word the block differently, but each one maps back to the same three causes. Here are the ones people hit most often.
| What you see | What actually triggered it |
|---|---|
| "Your IP has been blocked" on Wikipedia | A range block on a VPN, proxy, or shared carrier range your address sits inside |
| Cloudflare error 1020 or a permanent challenge | The address reputation or fingerprint failed a site's Cloudflare rules |
| A streaming service says proxy or unblocker detected | Your exit is on a known VPN or proxy list, so it is refused regardless of country |
| Reddit, 4chan, or a forum blocking posts | The address or its range is on a proxy or abuse list the site subscribes to |
| A store or marketplace showing an empty page or a captcha | A datacenter or flagged exit tripped the anti-bot layer before the page loaded |
The pattern under all of them is the same. A shared, hosting, or flagged address inherits a bad reputation, and the site acts on the reputation before it ever sees you.
How to fix it
Match the fix to the cause you found.
- If it is your own home address, the block is usually a shared-range problem you did not cause. Restarting the router sometimes pulls a fresh address from your ISP. If the block persists, your ISP can help, because the listing may be on a carrier range shared by many subscribers. This is the one case where the address is genuinely yours and the fix is on the ISP side.
- If it is a proxy or VPN exit, do not appeal it, replace it. A datacenter or free shared exit is usually already flagged, so switching to another one of the same kind just trades one blocked address for another. A clean residential exit clears the block in the common case, because it belongs to a real consumer ISP and passes the network and reputation check that stopped you. Our residential proxies route through real home connections and start at $0.44/GB pay-as-you-go, and you can read any exit with the proxy checker before you trust it, so you do not land on another flagged address.
- If the checks came back clean and you were still blocked, the trigger was behavior. Slow down, load pages the way a browser does, and stop rotating a logged-in session between countries. No new address fixes a pattern that looks like a bot.
What a clean address does not fix
Swapping to a clean residential exit clears the block that reputation and network cause, which is most of them, but it is one layer and not a guarantee. A site still reads your TLS fingerprint, your headers, and your pacing, so a clean address behind an automation tool with a robotic rhythm can still be challenged. Anyone promising an address that is never blocked is selling a story. The honest version is that a clean, believable exit removes the reason most blocks happen, and good behavior removes the rest.
Sources
- Cloudflare, "Machine learning to detect bot attacks that use residential proxies": why consumer ISP ranges are treated differently from hosting ranges.
- Wikipedia, "Blocking policy": how range blocks and open-proxy blocks apply to addresses that never edited.
- DataDome, "What are data center proxies and how to detect them?": how anti-bot systems score hosting ASNs against ISP-registered ranges.