IP Fraud Scores Explained: What a Clean Proxy IP Means

Whenever you sign up, log in or pay on a website, a risk rating for your IP address is fetched under the hood from a scoring service. That rating is the fraud score. A low one lets you through unnoticed, while a high one earns you a CAPTCHA, an extra verification step, or a decline with no explanation. For anyone working through proxies, it is the single most consequential number attached to an address.

What the score is

A fraud score rates, usually on a scale from 0 to 100, how likely traffic from a given IP is to be abusive, with zero denoting an ordinary connection. IPQualityScore (IPQS) and Scamalytics are the best known services, and the larger anti-bot systems maintain equivalents of their own.

Since each service draws on its own data, the same IP may well score differently from one to the next. As a rough guide, sites relying on IPQS tend to regard 75 and above as suspicious and 85 and above as grounds for blocking.

What raises it

• The type of network. Hosting ranges, VPN providers and Tor exits carry a penalty from the outset, whereas an address on a consumer ISP starts out neutral. A static residential proxy sits on a consumer ISP by design.
• Being identified as a proxy. Scoring services keep track of known proxy networks and flag their addresses, and a flagged IP is treated with suspicion even when its number is low.
• What the address has been used for. Spam, credential stuffing, card testing, aggressive scraping and blocklist entries all attach themselves to the IP and take a long while to fade.

Why most proxy IPs score poorly

The typical proxy address has passed through the hands of many strangers. On rotating networks in particular, the IP you receive was being used by someone else minutes earlier for purposes you will never learn of, and that history becomes yours.

A clean IP is one that carries none of this baggage: it sits on a residential network, is not known as a proxy, and has no abuse on record. That is what a provider means, or ought to mean, by "zero fraud score".

How to check an IP

1. Connect through the proxy and take note of the exit address.
2. Look it up on two separate services, for instance the public checkers offered by IPQS and Scamalytics.
3. Read the flags alongside the number, as "proxy" or "VPN" set to true is a problem even when the score itself is low.

A clean IP only stays clean if you keep it that way

A fraud score of zero is a starting position and nothing more. Any address can turn bad through abuse, and once it has, recovery is slow. The usual ways a good IP gets ruined:

• Sending one site far more requests than any household ever would.
• Running many unrelated accounts through a single address.
• Using it to send bulk email.
• Sharing the login with people whose activity is outside your control.

Looking after it, on the other hand, takes very little:

• Give each IP a single job and keep its activity believable.
• Dedicate one address to each account, for the reasons laid out in one profile, one IP.
• Lock access down. With an allowlist in place only your own machines can use the proxy, so a leaked password cannot put someone else's traffic on your IP.

It is also worth remembering that the IP is one signal among several. Sites weigh your browser, your behaviour and the account's own history as well, and a flawless address will not rescue a session that fails on those.

What we deliver

Leastslow's inventory is hand picked: residential subnets with no prior proxy or VPN use, delivered at a fraud score of zero. Allowlists and denylists come included, so keeping control over who uses your addresses is a matter of a minute. Pricing is on the homepage.