How to check if an IP is on a blacklist and change the proxy.

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Ads suddenly stopped running. The Facebook Ads account gets banned immediately after topping up. The Wildberries parser returns a 403 error. Avito does not allow posting an ad. All of this is classic symptoms of one problem: your IP address has been blacklisted. In this article, we will discuss how to diagnose this in 5 minutes and what to do to work without restrictions again.

What is an IP blacklist and why do IPs get blacklisted

An IP blacklist (blacklist, DNSBL, blocklist) is a database of addresses that have been recognized as sources of unwanted activity. Such databases are maintained by anti-spam organizations, advertising platforms, large websites, and even internet service providers. When your IP enters such a database, websites and services automatically begin to restrict or completely block requests from it.

The reasons for being blacklisted can vary, and it is not always your fault:

Mass account registration — if many accounts were created in a row from one IP on Facebook, Instagram, or TikTok, the platform flags this as suspicious activity.
Intensive parsing — frequent automated requests to Wildberries, Ozon, or Avito can lead to an IP ban.
Previous owner of the IP — if you are using a proxy or VPN, this address may have been "exposed" by another user before you.
Spam and mass mailings — IPs that sent mass emails or messages quickly end up in anti-spam databases.
Violation of advertising platform rules — several rejected ads in a row, cloaking, prohibited offers — all of this can lead to an IP ban.
Shared data center IP — proxies from data centers are often used by thousands of people, and if even one of them violates the rules, the entire range of addresses can be blocked.

It is important to understand: there are several types of blacklists. Some are maintained by anti-spam organizations (Spamhaus, SURBL, Barracuda) and mainly affect email deliverability. Others are maintained by the platforms themselves (Facebook, Google, Wildberries) and are stored within their systems. The third type is maintained by providers and firewalls. Therefore, diagnostics should cover several sources at once.

Symptoms: how to understand if your IP is blocked

Before checking your IP with specialized services, pay attention to the characteristic signs. Experienced arbitrage specialists and SMM professionals usually recognize the problem by the behavior of the platforms — even before they start diagnostics.

Red flags — your IP is likely blacklisted:

Facebook Ads: the account gets banned immediately after creation or balance top-up
Instagram: new accounts immediately request phone confirmation or get blocked
TikTok Ads: the account is created, but ads go into endless moderation
Wildberries / Ozon: the parser receives a 403 Forbidden error or CAPTCHA on every request
Avito: the ad submission form does not send, and a message appears saying "try again later"
Google Ads: the account gets blocked when trying to add a payment method
Any website: instead of content — a page with CAPTCHA or a message "your IP is blocked"
Email newsletters: emails go to spam for most recipients

If you see at least 2-3 signs from this list — it is almost certainly an IP issue. But there is a nuance: sometimes the block concerns not the IP, but the browser fingerprint or cookies. Therefore, it is important to conduct a full check to avoid wasting time changing proxies when the problem lies elsewhere.

Tools for checking IPs in blacklists

There are several categories of tools. Some check IPs against anti-spam databases (important for email and overall reputation), while others show how platforms perceive your address. Below is a table of the most useful services:

Service	What it checks	Who it is useful for
MXToolbox Blacklist Check	100+ anti-spam databases simultaneously	Email marketers, overall reputation
IPQualityScore	Fraud score, proxy/VPN detection, reputation	Arbitrage specialists, SMM, e-commerce
Scamalytics	IP risk score for advertising platforms	Facebook/Google Ads arbitrage specialists
WhatIsMyIPAddress Blacklist	Basic check against popular lists	Quick initial diagnostics
Spamhaus	The main anti-spam database in the world	Email, critical for deliverability
PixelScan / Whoer.net	Proxy/VPN detection, DNS leaks, fingerprint	Arbitrage specialists, anonymity check
AbuseIPDB	Complaints about IPs from users and services	Checking the "history" of the proxy address

For arbitrage specialists and SMM professionals, IPQualityScore and Scamalytics are the most important — these are the data used by Facebook, TikTok, and Google to assess IP quality. If there is a high fraud score or the IP is marked as "datacenter proxy" — the platform will treat your accounts with increased suspicion.

Step-by-step guide: how to check your IP in 5 minutes

Follow this algorithm — it is suitable for checking both your home IP and the proxy you plan to use.

Step 1 — Find out your current IP

Open the website 2ip.ru or whatismyip.com in your browser. You will see your current IP address. Write it down — you will need it for the check. If you are already using a proxy, make sure that the browser displays the proxy IP, not your real one.

Step 2 — Check against anti-spam databases

Go to mxtoolbox.com/blacklists.aspx, paste your IP in the field, and click "Blacklist Check". The service will check the address against more than 100 databases simultaneously. If a red status appears next to Spamhaus, Barracuda, or SURBL — the IP is seriously compromised.

Step 3 — Check the fraud score for advertising platforms

Open ipqualityscore.com/free-ip-lookup-proxy-vpn-test and enter the IP. Pay attention to three indicators:

Fraud Score — should be below 50. Above 75 — critical for Facebook and Google.
Proxy / VPN / Tor — if it says "Yes", platforms know that this is not a real user.
Recent Abuse — if "Yes", the IP has been used for fraud recently.

Step 4 — Check the history of complaints

Go to abuseipdb.com and enter the IP. If there have been complaints about the address in the last 90 days — this is a bad sign. Especially if the complaints relate to port scanning, brute forcing, or spam.

Step 5 — Check for anonymity and leaks

Open pixelscan.net or whoer.net. These services will show how "clean" your browser appears to websites. If there are WebRTC or DNS leaks — platforms see your real IP even through the proxy. This is especially important when working in Dolphin Anty, AdsPower, or GoLogin.

If the results show that the IP is in blacklists or has a high fraud score — move on to the next sections: we will discuss how to resolve the issue.

Who and why blocks IPs: Facebook, Google, marketplaces

Different platforms block IPs for various reasons and with different levels of severity. Understanding this will help you choose the right protection strategy.

Facebook Ads and Instagram

Facebook uses a multi-level verification system. The platform analyzes not only the IP but also the browser fingerprint, device history, and behavioral patterns. Nevertheless, the IP is the first filter. Data center addresses are blocked by Facebook almost instantly. IPs that have already been used to create blocked accounts are particularly dangerous — Facebook remembers them and applies "related bans" (chain ban). If 5 accounts were created from one IP and all got banned — the sixth will also be banned immediately.

TikTok Ads

TikTok checks the geolocation of the IP and compares it with the account data. If you register an account for the USA, but the IP shows Russia or Ukraine — this is an immediate red flag. In addition, TikTok actively blocks ranges of data center IPs, especially from well-known hosting providers.

Google Ads

Google has one of the most complex detection systems. The company maintains its own databases of suspicious IPs and regularly updates them. An IP ban here usually means an inability to add a payment method or pass verification. Google also blocks IPs that have been associated with click fraud.

Wildberries, Ozon, Avito

Marketplaces mainly block IPs for automated requests — price parsing, stock monitoring, mass ad posting. Wildberries uses Cloudflare and its own anti-bot systems. If a parser makes more than 30-50 requests per minute from one address — blocking is inevitable. Avito blocks IPs for attempts to post ads from "foreign" regions or for mass publication.

How to solve the problem by changing the proxy

So, you have confirmed that the IP is blacklisted. The quickest and most effective solution is to change the IP through a proxy. However, it is important not to make the same mistakes: simply taking a random proxy and hoping it will be "clean" is not the best strategy. Here is the correct approach:

1. Choose a proxy and check it BEFORE starting work

After obtaining a new proxy, do not rush to create accounts immediately. First, run it through IPQualityScore and MXToolbox. The fraud score should be below 40, and the proxy should not be identified as "datacenter" or "VPN". Only after that can you start working.

2. Set up the proxy in an anti-detect browser

For arbitrage and SMM, changing the proxy without an anti-detect browser is a half-measure. Platforms see not only the IP but also the browser fingerprint. Use Dolphin Anty, AdsPower, GoLogin, or Multilogin. Create a new profile, link it to a clean proxy, and work only through it.

How to set it up in Dolphin Anty: open "Create Profile" → "Proxy" section → choose type (SOCKS5 or HTTP) → enter host, port, username, and password → click "Check Proxy". If the status is "OK" — you can start working.

3. Do not transfer "dirty" history to the new IP

A common mistake: a person changes the proxy but logs into Facebook with old cookies in the same browser. The platform instantly links the new IP to the old blocked account. Always create a completely new browser profile with clean cookies and cache.

4. Use IP rotation for parsing

If you are parsing marketplaces — one proxy will not save you. Rotation is needed: every N requests, the IP changes automatically. Most residential proxy providers support rotation through a special endpoint. This allows you to make thousands of requests to Wildberries or Ozon without getting blocked.

What type of proxy to choose for your task

Not all proxies are equally useful. The choice depends on the task: what works for parsing may not be suitable for account farming. Let's break down the three main types:

Proxy Type	How it appears to websites	Best for	Risk of ban
Data Center	Server IP, easily detectable	Parsing without strict protection, SEO monitoring	High
Residential	Real IP of a home user	Multi-accounting, parsing with protection, SMM	Low
Mobile	IP of a mobile operator (4G/5G)	Facebook Ads, Instagram, TikTok Ads	Minimal

Residential proxies — for most tasks

Residential proxies are IP addresses of real home users. For Facebook, Instagram, TikTok, and marketplaces, such an address appears as a regular visitor, not as a bot or server. This is why they are significantly less likely to end up in blacklists. If you manage 10-50 Instagram accounts or work with multiple ad accounts — residential proxies will be your main tool.

Mobile proxies — for advertising platforms

Arbitrage specialists working with Facebook Ads and TikTok Ads often choose mobile proxies — they use IPs from mobile operators (MTS, Beeline, Tele2, etc.). The feature of mobile IPs is that one address can be used simultaneously by thousands of real users through NAT — therefore, platforms rarely ban such addresses. For account farming on Facebook and working with Instagram, this is the gold standard.

Data center proxies — for parsing without strict protection

Data center proxies are the fastest and most affordable. They are suitable for tasks where the platform does not apply strict anti-bot protection: price monitoring on Yandex.Market, parsing open data, checking positions in search engines. For working with Facebook, Instagram, or Avito, it is better not to use them — the risk of getting blacklisted is too high.

How to avoid getting blacklisted again: prevention

Changing the proxy solves the problem here and now, but without proper prevention, you will find yourself in the same situation again in a week. Here is what you need to do systematically:

Checklist for protecting your IP from being blacklisted:

✅ One account — one IP. Never use one proxy for multiple accounts on the same platform.
✅ Check proxies before use. Every new IP — through IPQualityScore and MXToolbox.
✅ Use an anti-detect browser. Dolphin Anty, AdsPower, or GoLogin isolate profiles and prevent platforms from linking accounts.
✅ Do not make sudden actions on a new account. Gradually warm up accounts — this reduces the likelihood of a ban due to behavioral signs.
✅ Limit parsing speed. No more than 10-20 requests per minute from one IP. Use delays between requests.
✅ Rotate IPs when parsing. Set up automatic IP change every 50-100 requests.
✅ Monitor geolocation. The IP should match the country of the account and the browser language.
✅ Do not use one proxy for too long. Change IP every 2-4 weeks during intensive work.
✅ Avoid public proxies and free VPNs. They are already blacklisted with a 90% probability.

Specifically about working with anti-detect browsers

If you are working in Dolphin Anty or AdsPower, it is important to correctly set the correspondence between the proxy and the profile parameters. The browser language, time zone, screen resolution, and fonts — all of this should match the country of the proxy. For example, if you are using a US residential IP, but the profile is set to Russian language and Moscow time zone — the platform will notice this.

In Dolphin Anty: when creating a profile, enable "Auto-fill by IP" — the browser will automatically pull the language and time zone from the proxy's geolocation. In AdsPower, a similar feature is called "Sync with proxy". This simple setting significantly reduces the risk of detection.

What to do if your IP is blacklisted by Spamhaus

Spamhaus is the most authoritative anti-spam database. If your IP is there, it seriously affects email deliverability and reputation. You can submit a delisting request directly on the Spamhaus website — but this only works if you own the IP (for example, if you rent a dedicated server). If you are using a proxy — simply change the address to a clean one and check it in advance next time.

Conclusion

Being blacklisted is a common problem for arbitrage specialists, SMM professionals, and marketplace sellers. The good news is that diagnostics take 5 minutes, and the solution — switching to a clean proxy — is available immediately. The main thing is not to act blindly: first check the IP through IPQualityScore and MXToolbox, ensure that the new address is clean, and only then create accounts or launch the parser.

Key takeaways from the article:

Check your IP through IPQualityScore, MXToolbox, and AbuseIPDB before any serious work.
For Facebook Ads and Instagram — mobile proxies with minimal risk of ban.
For managing 10-50 Instagram and TikTok accounts — residential proxies in conjunction with Dolphin Anty or AdsPower.
For parsing Wildberries and Ozon — residential proxies with IP rotation.
One account = one IP. No exceptions.

If you are facing blocks and looking for clean IPs to work with advertising platforms or marketplaces, we recommend paying attention to residential proxies — they have real IPs of home users, are significantly less likely to end up in blacklists, and are suitable for most tasks: from multi-accounting on Instagram to price parsing on Ozon.

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How to Check if Your IP is Blacklisted and Fix It by Changing Proxies