Your Digital Disguise

Your IP address is the foundational layer of your online identity. If a website's anti-bot system flags your IP as malicious or highly suspicious, no amount of advanced browser fingerprint spoofing will save you.

When scraping at scale, you must distribute your traffic across thousands of different IP addresses to avoid rate limits and bans. This is where Proxies come in.

1. Datacenter Proxies

These are IPs owned by massive cloud providers like AWS, Google Cloud, Linode, and DigitalOcean. - The Good: Extremely fast (10Gbps+ links), cheap, and stable. - The Bad: Anti-bot systems maintain static lists of all Datacenter IP subnets (ASN databases). If a request comes from an AWS IP, the WAF instantly knows it is a server, not a real human at home. - Use Case: Scraping unprotected, simple websites, or internal B2B APIs that don't employ aggressive bot mitigation.

2. Residential Proxies

These are IP addresses assigned by local Internet Service Providers (ISPs like Comcast, AT&T, Vodafone) to actual, physical homeowners. Proxy providers acquire these by paying users to install background apps that share their bandwidth. - The Good: Highly trusted. When you scrape using a residential proxy, the WAF sees the traffic coming from a standard residential neighborhood. Blocking residential IPs risks blocking legitimate customers, so WAFs are extremely hesitant to do so. - The Bad: Expensive (billed by the Gigabyte, not by the IP), slower, and connection drops are common if the homeowner turns off their router. - Use Case: E-commerce scraping, sneaker botting, and bypassing moderate-to-strict Cloudflare/Datadome protections.

3. Mobile Proxies

The gold standard of stealth. These are IPs assigned by cellular carriers (Verizon, T-Mobile) to 4G/5G mobile devices. - The Good: Complete immunity to IP bans. Because cellular networks use CGNAT (Carrier-Grade NAT), thousands of real mobile phones share the exact same public IP address simultaneously. If a WAF bans a single mobile IP, they might accidentally ban 5,000 legitimate users on the same cell tower. Thus, Mobile IPs almost always get a free pass. - The Bad: Exorbitantly expensive and generally much slower than broadband. - Use Case: Instagram/TikTok automation, high-security financial scraping.

How Reputation Gets Built

Reputation is not static. Every request you (or anyone else on the same IP) make feeds a behavioral history: how many distinct sites has this IP touched today, how fast did it hammer associated domains, was it ever seen succeeding at a CAPTCHA, and how old is the IP lease. Freshly allocated ranges from cheap VPS vendors carry an instant penalty, while subnets that have been assigned to the same customer for years score far better. When you choose a proxy pool, you are effectively renting this aggregated history.

ASN and Subnet Intelligence

Reputation operates at three granularities: the exact IP, the /24 subnet, and the owning ASN (Autonomous System Number). WAFs map every ASN to a category—residential ISP, mobile carrier, cloud provider, hosting company, or anonymizer. A single bad ray in an otherwise clean residential ASN will not poison the whole ASN, but a datacenter ASN is poisoned from the start. This is why "which ASN owns my proxy" matters more than any single IP address.

IPv6 Considerations

Most consumer proxy pools are IPv4 because IPv4 addresses are scarce and valuable. IPv6, where a single residential connection can hold a /64 subnet of trillions of addresses, is much harder to ban precisely but much easier to block wholesale. Many WAFs simply penalize any IPv6 traffic that does not look like a dual-stack residential connection, so treat IPv6 proxies as a separate reputation pool rather than a free source of endless addresses.

Proxy Rotation Strategies

When buying a proxy pool, you typically route your code through a single "Gateway" endpoint provided by the proxy vendor. - Per-Request Rotation: Every single HTTP request you make is routed to a brand new IP. Best for stateless scraping (like downloading 1,000 distinct product pages). - Sticky Sessions: You maintain the same IP address for 5 to 15 minutes. Best for flows that require logging in, solving a CAPTCHA, and maintaining a session cookie. If your IP changes mid-session, the WAF will immediately flag the session as hijacked.