Let me be honest, a lot of people have been DMing me lately saying they used a VPN to sign up for ChatGPT, but as soon as their email was verified, the account got banned. I asked them if their IP was clean, and they said "what does clean even mean?" So here we are. Today I'm going to walk you through what IP purity actually is, and why whether your IP is clean or dirty can directly decide whether your new account survives or gets nuked.

1. What Is IP Purity

IP purity is basically a measure of how clean your IP address is. Clean means it hasn't been used for bad stuff and hasn't been flagged in various blacklists or risk-control databases.

Think about it. There are lots of IP addresses out there, but not all of them have been used for good purposes. Some IPs get used for刷单 (brushing orders), scraping, brute-force password attacks, mass spamming, and other shenanigans. These IPs get logged by security companies and risk-control platforms all over the world. When you visit a website, the backend quietly checks your IP's history. If it finds your IP has been used for malicious activities before, it's going to treat you with suspicion — either showing you a captcha wall or just banning you outright.

That's the core logic of IP purity. The cleaner your IP, the higher your chances of successfully registering accounts, buying tickets, or logging into banking sites. The dirtier your IP, the more doors slam in your face.

So how do you know if your IP is clean? That's where IPIPAI comes in. You can head over to IPIPAI's IP lookup page, enter your IP, and see the risk score. Higher scores mean more danger — we'll get into that.

2. Which Databases Track Dirty IPs

IPIPAI pulls from 16 mainstream threat-intelligence databases to cross-verify IP purity. These aren't random picks — each one is a well-known player in the cybersecurity space. Here's a rough breakdown:

CategoryRepresentative DatabasesWhat They Track
Threat IntelligenceSpamhaus, Openbl, AbuseIPDBSpam, brute force, malicious scanning
Proxy/VPNProxyList, IP2Proxy, BlocklistDEIs this IP a proxy node?
BotnetAlienVault, PhishtankIs this IP a botnet zombie?
Scraping/AbuseStopforumspam, CINS ArmyMass registration, vote manipulation, forum spam

Look at that — 16 databases combined, tracking hundreds of millions of flagged IPs. If your IP shows up in even one of these, it's got a criminal record. If it shows up in two or three, congratulations, you've got an IP that gets blacklisted everywhere it goes.

By the way, you can check your IP's registration info on IPIPAI's Whois lookup page, then compare that with the risk score to get a clearer picture of where your IP comes from.

3. How to Read the Purity Score

IPIPAI scores every IP on a scale of 0 to 100. Higher means cleaner, lower means dirtier. Here's a quick guide:

To be honest, if you want to register for ChatGPT Plus or TikTok Creator accounts, aim for an IP scoring 85 or above. Below 70, I'd strongly advise against using it for anything that requires identity verification. You'll just end up with a banned account and nothing to show for it.

4. Why ChatGPT Cares So Much About Your IP

This one makes sense. When ChatGPT opened registration, the influx of users from overseas VPN IPs was massive. OpenAI's backend risk-control system does a few things:

First, it checks if your IP is a datacenter IP. We covered this in our earlier article Residential vs Datacenter IP — datacenter IPs come from server racks, not home broadband connections. When OpenAI sees a datacenter IP, its alert level jumps straight to maximum.

Second, it checks whether your IP is clean. If an IP was previously used to mass-register 50 accounts and one of them got banned for policy violations, that IP goes on the blacklist. From then on, anyone using that IP to register will get rejected or asked for additional verification.

Third, it cross-references your IP's registered location with what you claim to be. If you register from a Japanese IP but your browser language is Chinese and your email is registered in China, those signals stack up and the risk system flags your account as suspicious.

So before you register for ChatGPT, check your IP score on IPIPAI to make sure it's above 85. Then go to the streaming unlock test page and confirm that ChatGPT shows as "✓ Accessible". Do both of these, and your registration success rate will be much higher.

5. TikTok's IP Requirements Are Even More Extreme

If ChatGPT is strict, TikTok is extreme. TikTok's risk-control logic is more complex than ChatGPT's — it doesn't just check if your IP is clean, it looks at a bunch of other signals too:

First, your IP must match the country you claim to be in. If you register from a US IP but your phone system language is Chinese, TikTok's backend gets immediately suspicious. This has nothing to do with IP purity — it's just information mismatch.

Second, your IP must be clean. TikTok's internal risk-control databases are larger than any public ones. What shows up in Spamhaus is just the tip of the iceberg. Many IPs that look clean in public databases are already flagged in TikTok's internal blacklist. So checking on IPIPAI alone isn't enough — you also need to know the IP's history.

The worst part is "usage history." An IP that's been used by many different people before, even if none of those sessions triggered a ban, can still get flagged as a "high-risk reused IP" by TikTok. There's no way to check this from the outside. The only real solution is to use a relatively fresh IP or a residential IP that hasn't been heavily reused.

So do a full IP check on the IPIPAI homepage, see how many databases flag your IP, and then cross-reference with the streaming unlock guide to assess whether your IP is suitable for TikTok registration.

6. How to Tell If Your IP Is Clean Enough

Here's a practical checklist you can follow:

  1. Go to IPIPAI IP lookup and enter your IP. If the score is below 85, forget it — get a different IP.
  2. Look at the detailed report and count how many databases flagged your IP. If three or more databases have a hit, regardless of the overall score, switch IPs.
  3. Go to the streaming unlock test and check the ChatGPT and TikTok status. If neither is unlocked, your chances of successful registration are basically zero.
  4. Cross-check with the VPN testing guide to make sure your VPN isn't leaking. Sometimes the IP score is fine, but DNS leaks or WebRTC leaks expose your real IP — and that's enough to get you flagged.
  5. If all of the above pass but you still can't register, your IP is likely on the target platform's internal blacklist. The only fix is to switch nodes — there's no other way.

One more thing — VPN users should definitely read how VPNs affect your IP address to understand the patterns of IP changes when switching nodes. Many cheap VPNs have nodes whose IPs are already flagged by every major platform. Switching nodes won't help because they're all dirty.

7. What to Do If Your IP Is Already Dirty

To be honest, once an IP gets flagged in a risk database, whitewashing it is nearly impossible. Spamhaus blacklist removals require the IP owner to file a removal request, and the process takes weeks. As a regular user, you have no way to do that.

The only real solution is to get a different IP. If you're using a VPN, switch to a different node. If you're using a VPN service provider, ask customer support to assign a new IP. If you're on a VPS, you'll need to either switch servers or request a new IP range. We also covered this in Native IP vs Broadcast IP — when picking a node, always check the ASN ownership to avoid datacenter IP ranges that have been heavily flagged.

Bottom Line

At the end of the day, IP purity is a lot like personal reputation. Whatever your IP has been used for in the past leaves a mark. People who use IPs for brushing orders, scraping, or mass-registration eventually poison those IPs — and the next person who uses them pays the price.

So take two minutes to check your IP score on IPIPAI. It's free, and it could save you from a lot of account bans.