IPv4 vs. IPv6 Proxies
IPv4 proxies use 32-bit addresses (the current standard). IPv6 proxies use 128-bit addresses - more abundant and often cheaper, but with limited site support.
IPv4 (Internet Protocol version 4) addresses are 32 bits long - about 4.3 billion possible addresses. IPv6 addresses are 128 bits - 340 trillion trillion trillion addresses. This abundance is why IPv6 proxies cost a fraction of IPv4.
The practical difference for proxy users: almost every website on the internet supports IPv4. IPv6 support is less universal - some sites, APIs, and services do not accept IPv6 connections. Before using IPv6 proxies, verify your target site handles IPv6 traffic.
IPv6 proxies are useful for mass operations: sending large numbers of requests to IPv6-compatible targets, creating large volumes of accounts on platforms that support IPv6, or any task where you need many unique IPs at very low cost.
IPv6 address blocks are so large that each user can have dedicated subnets rather than shared IPs. This makes IPv6 proxies easy to scale - providers can allocate millions of unique IPs without the pool management complexity of IPv4.
Blocks differ too. Sites that ban IPv6 ranges often ban entire /48 or /64 subnets, which can cover millions of addresses at once. IPv4 bans are more targeted - typically /24 or /32 ranges. If a target is aggressive about IPv6 banning, switch to IPv4 residential or ISP proxies.
Two address spaces, one internet
IPv4 uses 32-bit addresses, which caps the space at about 4.3 billion. Those ran out years ago, so what circulates now is a rental market where a single address carries a real monthly cost.
IPv6 uses 128 bits. The space is large enough that allocation stops being a constraint, which is why an IPv6 address costs a fraction of an IPv4 one and why providers hand out enormous blocks without ceremony.
The internet did not switch, it doubled up. Most large sites publish both an A record and an AAAA record and are reachable either way. Plenty of mid-size sites and APIs never added AAAA, and those are unreachable over IPv6 no matter what you configure.
When IPv6 saves money and when it wastes it
IPv6 is our cheapest product by a wide margin, and it works only where the target supports it:
Check before you buy
dig AAAA example.com +short # nothing back means IPv6 cannot reach it
IPv4 $1.80 down to $1.15 per address per month, 41 countries
IPv6 $0.20 per address per month, 17 countries- Test one address against your real target list before buying in bulk. The price makes bulk tempting and the AAAA requirement makes it wasteful.
- Force the protocol when testing. A dual-stack client may quietly use IPv4 and tell you the IPv6 proxy works.
- Some sites ban entire IPv6 prefixes rather than single addresses, so spread purchases across blocks.
- Both are static and dedicated with unmetered traffic on our side, delivered on ports 50100 and 50101.
Where the comparison breaks down
IPv6 is not a cheaper IPv4
It reaches a different, smaller set of destinations. Price is not the variable that decides.
Dual-stack does not mean automatic
Your client picks. Test explicitly or you will measure the wrong path.
Neither is more anonymous
Both are hosting addresses if bought as datacenter products, and both look that way in a registry lookup.
IPv6 scarcity is not a factor
Blocks are enormous, which is exactly why some sites judge them by prefix rather than by address.
Related terms
See this in practice
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