How to Check if Your IP Is Blacklisted (and How to Fix It)

You can do everything right, post good content, follow every rule, and still get throttled because of something you never see: the reputation of the IP address you're connecting from. If your reach suddenly tanked, or logins keep asking for extra verification, or your posts feel buried, a blacklisted IP is one of the first things worth ruling out. The good news is that checking is free and takes about five minutes. The fix is usually simpler than people expect, just not the fix most people guess.

Here's exactly how to find out whether your IP is flagged, why it might be even when you've done nothing wrong, and what actually works to get clean.

What an IP blacklist actually is

There isn't one master list. "Blacklisted" is a loose term that covers two different things, and it helps to keep them separate.

The first kind is a real DNSBL, short for DNS-based blocklist. These are databases like Spamhaus, SpamCop, Barracuda, and SORBS that track IP addresses caught sending spam, hosting malware, or running other abuse. They were built mostly for email, so mail servers check them to decide whether to accept a message. If your IP shows up here, it's because that address (or a range it sits in) was seen doing something bad, recently or in the past.

The second kind is fraud and risk scoring. Services like IPQualityScore and Scamalytics don't just give a yes/no. They grade an IP from 0 to 100 based on whether it looks like a bot, a proxy, a VPN, a hosting range, or an address with a history of fraud. A score near 0 reads as a normal human on a normal connection. A score in the 70s or 80s reads as risky, and apps quietly treat that traffic with suspicion. Social platforms, banks, and ad networks lean heavily on this kind of scoring.

So when someone says "my IP is blacklisted," they might mean it's literally on Spamhaus, or they might mean it scores high enough on a fraud service that apps are throttling them. Both matter. We'll check both. If you want the deeper background on scoring, we wrote a full breakdown of what a clean IP and fraud score really mean.

How to check your own IP, free, in five minutes

You need two things: your public IP, and a couple of lookup tools to run it through.

Step 1: find your public IP

Search 'what is my IP' on Google, or visit a site like ipinfo.io or whatismyipaddress.com. Copy the number it shows. Note that this is your public IP, the one the internet sees, not the '192.168.x.x' address your router hands out at home. If you're on phone data, the public IP belongs to your carrier. On Wi-Fi, it belongs to your home or office ISP.

Step 2: run it through a fraud scorer

Go to ipqualityscore.com and use their free IP lookup. Paste your address. Read the result carefully. The two fields that matter most:

• Fraud Score (0 to 100). Under 25 is generally fine. Over 75 means apps are likely treating you as risky.
• Flags like 'Proxy', 'VPN', 'TOR', 'Bot', 'Recent Abuse', and the connection type ('Residential', 'Mobile', 'Datacenter'). A clean residential or mobile IP with no flags is what you want. A datacenter IP, or anything flagged as proxy/VPN, is the opposite.

Then do the same on scamalytics.com. It gives its own fraud risk rating and a short note on why. If two independent services both flag you, that's a strong signal, not a fluke.

Step 3: run a DNSBL check

For the email-style blocklists, use a tool like MXToolbox (mxtoolbox.com/blacklists.aspx). Paste your IP and it checks dozens of lists at once, including Spamhaus, and shows you green (clean) or red (listed) for each. Other options like multirbl.valli.org or spamhaus.org's own lookup do the same thing.

Read what they tell you. A clean result across all three checks (low fraud score, no proxy flags, no DNSBL hits) means your IP reputation is healthy and your reach problem is probably something else. A bad result on any of them is worth taking seriously.

Why your IP might be listed even though you did nothing wrong

This is the part that catches people off guard. You can be flagged without ever having sent a spam email or run a bot. Here's how that happens.

You're sharing the address. Most home and mobile internet uses something called CGNAT, where your ISP puts dozens or hundreds of customers behind a single public IP to conserve addresses. If one of those strangers sent spam or got infected with malware, the shared IP picks up the bad reputation. You inherit it. This is extremely common on mobile carriers.

A previous user burned it. ISPs recycle addresses. The IP you have today might have belonged to a spammer or a bot farm last month. The blocklists and fraud databases remember the address, not who's holding it now.

You're on a VPN or datacenter range. This is the big one for creators. Most ordinary VPNs route you through datacenter IPs, and datacenter ranges are flagged almost by default because real humans don't usually browse from a server rack. So the "privacy" tool you turned on to protect yourself is often the exact reason your fraud score jumped. A typical consumer VPN exit can score 80 or higher and sit on multiple lists.

Malware on the network. If a device on your network is infected and quietly sending spam or attacking other servers, your whole public IP can get listed, and you'd have no obvious sign at home.

The honest takeaway: a listing usually isn't a verdict on you. It's a verdict on the address, and you often just happen to be standing on it.

What to actually do about it

Now the practical part, because the advice you'll find online ("request delisting!") is mostly wrong for normal people.

If you genuinely own the IP

If it's a dedicated static IP that's truly yours, a business line or a server you control, then you can fix it at the source. Find and stop whatever caused the listing (kill the malware, secure the mail server), then go to each blocklist's site, such as spamhaus.org, and submit a delisting request. They'll usually clear it once the abuse stops. This is the only situation where delisting is the right move.

If it's a shared or carrier address (most people)

You cannot delist an address you don't control. You can't call Spamhaus and ask them to clear your carrier's CGNAT pool because of the other 200 people sharing it. Requesting delisting on someone else's IP just wastes your time.

The realistic fix is to get onto a different, clean IP. That means changing the address you appear from to one with a good reputation and no flags. How you do that depends on what you're trying to protect. If the goal is clean access for posting and browsing as a creator, see our guide on how to get a US IP address for TikTok and Instagram.

Why the type of clean IP matters

Here's where most people go wrong. They get flagged, switch to a regular VPN, and end up worse, because they traded a maybe-shared residential IP for a definitely-flagged datacenter one. Not all clean IPs are equal, and the connection type is most of the story. We compare them side by side in residential vs mobile vs datacenter IPs for creators, but the short version: datacenter is the worst, residential is better, and a real mobile IP is usually the cleanest because it comes from an actual carrier network full of real phones.

This is the gap ShadowProof was built to close. Instead of a datacenter server, it routes your phone through a real US 5G mobile IP, an actual address on a US carrier network. That's why a typical T-Mobile proxy might score a fraud rating of 84 and sit on blocklists, while a ShadowProof connection scores 0 on ipqualityscore.com and shows no VPN or proxy flag. You can run the exact same checks above on it and watch them come back clean. It's system-wide, one tap, no logs, and you set it up through the free OpenVPN Connect app. Plans run from a $5 one-time Day Pass up to $59.99 a month, so you can test a clean IP for a day before committing. If you want to try it, start here.

A quick reality check, though: a clean IP fixes the IP part of your problem and nothing else. If your account has other issues, a good address won't paper over them, and nobody can guarantee a specific outcome on a platform we aren't affiliated with. What it does do is remove one common, invisible reason apps quietly distrust your traffic.

Frequently asked questions

How do I know if my IP is blacklisted?

Find your public IP (search 'what is my IP'), then run that address through three free tools: ipqualityscore.com for a fraud score, scamalytics.com for a second opinion, and MXToolbox for the email-style DNSBLs like Spamhaus. If you get a low fraud score, no proxy or VPN flags, and no DNSBL hits, you're clean. A high score or a red listing means you're flagged.

How do I fix a blacklisted IP?

If you truly own the IP, stop whatever caused the listing and submit a delisting request on each blocklist's site. If it's a shared, carrier, or CGNAT address (which is most people), you can't delist it, so the practical fix is to move onto a different IP that already has a clean reputation. Aim for a residential or mobile address rather than a datacenter one.

Why is my IP blacklisted?

Usually not because of anything you did. Common causes are sharing a CGNAT address with other customers, inheriting an address a previous user burned, being on a VPN or datacenter range that's flagged by default, or having an infected device on your network. The blocklists track the address, not the person holding it right now.

Can I just change my IP if it's blacklisted?

Yes, and that's often the cleanest fix, but how you change it decides whether it helps. Restarting your router might get you a new address from the same flagged pool. Switching to a random VPN can make things worse if it hands you a datacenter IP. The reliable move is to route through an address with a known clean reputation, ideally a real mobile IP, then re-run the checks above to confirm it comes back clean before you rely on it.