IP reputation
The accumulated trust score a site or third-party service assigns to an IP address based on its network, history and behaviour.
IP reputation is the standing an address carries before you send anything. It is assembled from two kinds of input: what the address IS, meaning which organisation owns the range and whether it is consumer, hosting, mobile or corporate, and what the address has DONE, meaning spam reports, fraud signals, abuse complaints and previous blocks. Reputation services aggregate that and sell the result, and a great many sites simply buy the answer rather than computing it themselves.
Because it precedes the request, it sets a ceiling that behaviour cannot lift. A residential address starts trusted because its network and history are unremarkable. A datacenter address on a range with an abuse record starts suspect no matter how politely you behave, and there is nothing you can do inside a request to change a judgement that was made before the request was read.
The part people find genuinely unfair is that reputation attaches to neighbourhoods, not just to individual addresses. Scores are frequently applied at subnet level, so an address can be penalised for what its neighbours did, and a brand-new IP inside a badly-behaved range inherits that range's standing on arrival. This is exactly why a fresh datacenter address so often behaves like an old dirty one.
It is also why a shared proxy is a reputational gamble rather than merely a cheaper option. On a shared address the history you inherit includes strangers you cannot see or influence, and the consequences of their behaviour land on you without warning and without explanation.
The unfairness runs the other way too, and it is worth knowing. Reputation is sticky and slow to recover, but it also decays: an address that behaved badly a year ago and cleanly since will usually have recovered, because the systems weight recent behaviour far more heavily than old. Reputation is a moving average, not a permanent record.
None of this is visible to you. There is no universal score you can look up, because every service maintains its own and every site weights them differently, which is why an address that works perfectly on one target is challenged on the next. When people say a proxy is bad, this invisible disagreement is usually what they have run into.
Practically, that makes reputation something you buy and protect rather than something you reset. Choose an address type whose starting position matches the target, avoid sharing when the task depends on a clean history, and do not spend a good address on volume that will spoil it.
How HProxy handles it
This is the honest reason we talk about re-verification rather than pool size. An address that answered cleanly last week can be carrying somebody else's consequences today, and the only way to know is to keep checking rather than to trust a list.
Frequently asked questions
How do I check my proxy's IP reputation?
There is no single authoritative score, because every reputation service maintains its own and every site weights them differently. What you can do is check the address against several public reputation and blocklist services for a rough picture, and then test the target you actually care about, which is the only score that affects you. An address can look clean everywhere and still be challenged by one specific site.
Can a bad IP reputation be fixed?
Sometimes, and slowly. These scores are weighted toward recent behaviour, so an address that has behaved cleanly for a sustained period usually recovers on its own. Some blocklists accept delisting requests. What you cannot do is fix it quickly or from your side alone, which is why abandoning a spoiled address is usually cheaper than rehabilitating it.
Why does a brand new proxy IP already have bad reputation?
Because reputation is often applied to the subnet rather than the single address. A newly issued IP inside a range with an abuse history inherits that range's standing before it has ever been used, so it is new to you and not new to the reputation systems. Recycled addresses carry the previous holder's history for the same reason.
Does IP reputation matter more than my behaviour?
It is evaluated first, which is not quite the same as mattering more. A poor score can get you challenged before your behaviour is examined at all, so it sets your ceiling. Good behaviour on a good address is what keeps you there. The two are sequential rather than competing: reputation decides whether you are given the chance, behaviour decides whether you keep it.
Do residential proxies always have good reputation?
No. The address type gives them a good starting position because consumer ISP ranges cannot be dismissed wholesale, but individual residential addresses absolutely accumulate bad histories through whoever used them before you. Type is the floor, not a guarantee.
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