Guide
Why am I getting blocked or stuck on CAPTCHAs?
Risk engines judge your IP before your page loads. The common causes — VPNs, datacenter IPs, shared CGNAT reputation, rate limits — and how to clear each one.
On this page
How the risk check works
Before most pages finish loading, a risk engine has already scored your request. The IP address is the first and heaviest signal: is it a datacenter or VPN address, is it on a blacklist or abuse score, is it shared by hundreds of users? On top of that come your browser's behaviour and fingerprint. The score decides what you see: a normal page, a CAPTCHA, a "verify you are human" step, or a hard 403.
The backdrop for 2026 matters: automated traffic — scrapers and AI agents — is the dominant reason sites are this strict. The systems that fight bots are calibrated against the flood, and genuine humans on unusual connections pay a small price.
The usual suspects
| Cause | What it looks like | Typical fix |
|---|---|---|
| VPN or proxy on | CAPTCHA or 403 on logins and streaming | Turn the VPN off for that site; datacenter exits get flagged |
| Datacenter IP (office, cloud) | Human-verification loops | Use a residential connection for that service |
| CGNAT shared reputation | Blocks that appear "out of nowhere" | Ask your ISP for a new address or a unique IPv4 |
| Rate limiting | Works, then stops after N requests | Slow down, clear cookies for the site, retry later |
| Geo mismatch | Banking/payment sites refuse you | Use a connection from your usual region |
| Site-side outage | Everyone reports it; status page confirms | Wait it out |
The shared-reputation trap
If you are behind carrier-grade NAT, your IP is shared with hundreds or thousands of neighbours. Abuse from any of them — spam, scraping, credential stuffing — lands on the shared address, and the risk engine does not care that it was not you. This is the classic "my connection was fine yesterday and now everything wants a CAPTCHA" scenario. The only real fixes are a fresh address from the ISP or getting off the shared pool entirely (a unique IPv4 or IPv6).
How to clear it
- Identify the cause — run the checker: is the verdict VPN/proxy/datacenter? Is the risk score elevated?
- Turn off the VPN for the affected site and reload.
- Clear that site's cookies — the risk verdict is often attached to the cookie jar, not just the IP.
- Wait and retry — scores decay; most transient flags clear within hours.
- Change the address if it is genuinely flagged — router reboot, mobile data, or a new lease from your ISP (how to change your IP).
When to contact the site
If the block persists on a clean residential connection, email the site's support with your current public IP, your approximate time zone and what you were doing. A human with your address in hand can usually whitelist or unflag within a day — far faster than any amount of CAPTCHA-fighting.
Frequently asked questions
Will changing my IP address fix a block?
Usually, yes, if the block is IP-reputation-based — which is the most common kind. It will not help if the site is down or if the flag is attached to your browser profile; clear cookies too.
Why do I get CAPTCHAs on my normal home connection?
Most often shared CGNAT reputation or a regional spike in bot traffic that raised the bar for everyone on that network. Both clear with time or a new address.
Is being blocked permanent?
No. Risk scores decay automatically, and blacklists can be disputed. A hard, permanent block of a single address is rare outside deliberate ban lists.
Keep reading
- What is an IP address?
- Public vs private IP addresses
- IPv4 vs IPv6
- How to hide your IP address
- How to check your IP address on a phone
- What is CGNAT?
- How to change your IP address
- Why does my IP address keep changing?
- How to find a website's IP address
- What is a datacenter IP?
- IPv6 privacy extensions
- What is an ASN?
- How IP geolocation works
- What is a local IP address?
- What is IP reputation?
- How websites detect VPNs and proxies
- What is a DNS leak?
- What is a WebRTC leak?
- Proxy vs VPN
- How to check if your VPN actually works
- Static vs dynamic public IP
- How to find out who owns an IP address
- IPv6 in 2026
- Check my public IP address
Check any other IP address
Investigating a suspicious login, a spam email header or a server log entry? Run any IPv4 or IPv6 address through the same geolocation and proxy checks.