IP blacklist checker: is this address on a spam list?
When an address lands on a public spam list, emails sent from it can bounce and sign-ups can fail. This tool asks several of those lists about one IPv4 address (the common kind, written as four numbers with dots). The box starts with your own IP. Put your proxy's IP in instead, or any other address, to check that one.
| Blocklist | Zone | Status |
|---|---|---|
| Spamhaus ZEN | zen.spamhaus.org | Clean |
| Barracuda | b.barracudacentral.org | Clean |
| SpamCop | bl.spamcop.net | Clean |
| SORBS | dnsbl.sorbs.net | Clean |
| UCEPROTECT L1 | dnsbl-1.uceprotect.net | Clean |
| PSBL | psbl.surriel.com | Clean |
| WPBL | db.wpbl.info | Clean |
| s5h.net | all.s5h.net | Clean |
Use these results as a guide, not the final word. Some lists don't answer properly when the question comes through a big public DNS service, so a result here can occasionally be wrong. Before you act on one, look the address up on that list's own website.
A spam blacklist, explained simply
Think of it as a public "handle with care" list for internet addresses. When an IP sends spam or misbehaves, it gets reported, and the list publishes it. These lists are called DNSBLs because computers check them through DNS, the same system that turns site names into addresses. Email servers check them as a message arrives, then accept it, mark it as spam or turn it away. Some websites use them as one clue among several. If your IP is on a well-known list, your email is usually the first thing to suffer.
Why a proxy's history matters to you
When you browse through a proxy, websites judge you partly by the reputation of its IP, and that reputation was built by everyone who used the address before you. Free and shared proxies are the likeliest to carry an old record of abuse. We keep watch over the reputation of our residential premium addresses, and a dedicated IP is yours alone, never shared with strangers. We don't offer ISP proxies as a plan of their own; the ISP proxies page explains what to pick instead. Whoever your provider is, you can test a proxy with the proxy checker and see the address it gives you on My IP.
Your own IP is listed: what to do
Start by stopping whatever caused it. That could mean cleaning up an infected computer, or switching off the program that was sending the spam. Next, visit the website of each list that names your IP, look the address up and follow its removal steps. Once the problem has stopped, most listings disappear by themselves after a while, even if nobody asks.
Blacklist questions from first-time users
What is an IP blacklist, in simple terms?
It is a public list of internet addresses that have been reported for sending spam or causing other trouble. You may also see them called DNSBLs, short for DNS-based blocklists. Email servers check these lists before accepting a message, and some websites look at them too when deciding how far to trust a visitor.
Why is my IP on a blacklist when I have done nothing wrong?
IP addresses get passed from one user to the next, so a listing is often down to whoever had the address before you. An infected computer on the same network, or another customer on a shared server sending spam, can cause it too. Most listings run out by themselves, and most lists let you ask for removal.
My proxy's IP is listed. Does that make the proxy useless?
Usually not. These lists mainly track email spam, so a listing may make no difference when you browse websites or collect public information. On our side, we keep an eye on the reputation of our dedicated and residential premium addresses so they stay in good standing.
How do I get an IP taken off a list?
First stop whatever caused the listing, such as an infected device or a program sending spam. Then go to the website of the list that named the IP, look the address up and follow its removal steps. If the IP belongs to a proxy you rent, contact the provider instead, because they look after that address.
