How does an IPv6 proxy work?
An IPv6 proxy is a server that opens connections to websites for you from an IPv6 address. Your client connects to the proxy over HTTP, HTTPS or SOCKS5, the proxy connects to the target over IPv6, and the target sees the proxy's IPv6 address instead of yours.
Your own machine does not need IPv6. On TrueProxies Datacenter IPv6 you reach the connection host over IPv4, and only the exit address the website sees is IPv6. IPv6 is specified in RFC 8200; its addresses are 128 bits long, against 32 bits for IPv4.
Teams use IPv6 proxies for work such as monitoring public pages, testing their own services over IPv6, QA from outside their network, and collecting public data from IPv6-reachable sites within each site's terms.
How is an IPv6 proxy different from an IPv4 proxy?
The difference is the address family. It changes three things: how many addresses a proxy can give you, how websites can group those addresses, and which websites you can reach at all.
| Factor | IPv6 proxy | IPv4 proxy |
|---|---|---|
| Address length | 128 bits | 32 bits |
| Total address space | 2^128 addresses | About 4.3 billion (2^32) addresses |
| Typical allocation | Whole prefixes, such as a /48 or a /64 | Single addresses or small ranges |
| How websites can group traffic | By single address or by prefix, such as a /64 or /48 | By single address or by range |
| Which websites it reaches | Only sites whose hostname publishes an AAAA (IPv6) record | Almost every public website |
| TrueProxies products | Datacenter IPv6; Residential IPv6 is coming soon | Residential IPv4 Unlimited and Residential IPv4 GB-based |
| TrueProxies pricing (checked September 29, 2026) | Plan speed and term, from $3.99 a day at 25 Mbps | Unlimited: plan speed and term, from $4.08 an hour at 10 Mbps. GB-based: traffic packs from $1.64 for 1 GB |
Because the IPv6 space is so large, a provider can dedicate a whole prefix to one customer, which is rarely practical with IPv4.
Does an IPv6 proxy change address per connection or per request?
On TrueProxies Datacenter IPv6 the address changes per connection, not per request. Each new connection gets a fresh address from your /48. A client that keeps a connection open, through HTTP keep-alive or a connection pool, keeps the same address for every request it sends on that connection.
To keep one address across connections, add a session token to your username. Every connection that carries the same token leaves from the same address, and a lifetime option, in seconds, sets how long it holds. The Datacenter IPv6 connection reference lists the accepted options.
# A new IPv6 address for each new connection
curl -x http://YOUR_HOST:8080 -U "YOUR_USERNAME:YOUR_PASSWORD" https://api64.ipify.org
# One address for every connection that carries session job42, for up to 10 minutes
curl -x http://YOUR_HOST:8080 -U "YOUR_USERNAME-session-job42-lifetime-600:YOUR_PASSWORD" https://api64.ipify.orgSpreading independent requests across addresses does not change what a website allows. Keep request rates within the limits the target sets, whichever address a request leaves from.
Why does a /48 matter for an IPv6 proxy?
A /48 is a block of 2^80 addresses, which is 65,536 separate /64 networks. It is the block size that RIPE-690, RIPE's guidance for network operators, recommends for a business customer: the network of one organization.
Two things follow. A private /48 means no other customer exits from your addresses, so a site's view of that prefix reflects only your traffic. And websites can act on a whole prefix: MediaWiki's administrator guidance recommends blocking IPv6 by /64 rather than by single address, and Cloudflare IP Access rules let a site owner block or challenge a /64 or a /48 in one rule. A limit applied to your /48 applies to every address in it.
Our explainer on /48 IPv6 subnets works through the address math and how sites treat prefixes.
Which websites work with an IPv6 proxy?
An IPv6 proxy reaches a website only if the site's hostname publishes an AAAA record and its server answers on that address. TrueProxies Datacenter IPv6 has no IPv4 fallback, because translating to IPv4 would put a shared IPv4 address in place of your own IPv6 space.
Many sites still have no IPv6. Common Crawl's March 2026 analysis found 36,864 of the top 100,000 web hosts (36.9%) fully reachable over IPv6, and 61.9% with no AAAA record at all. Page resources matter as well: a study presented at IMC 2025 found only 12.6% of the top 100,000 websites fully IPv6-ready once every script, image and font is counted.
What counts depends on your workload. A client that fetches one HTML page or one JSON API needs only that hostname to have IPv6. A headless browser that renders the page needs every host the page loads. Check before you buy with the TrueProxies IPv6 test, or follow our guide on how to check if a website supports IPv6.
What happens when a site has no IPv6 address?
The request fails quickly with a clear answer instead of hanging. Over HTTP and HTTPS, TrueProxies Datacenter IPv6 returns 502 Bad Gateway with this sentence in the response body and in the X-Proxy-Reason header: “Datacenter IPv6 proxies reach IPv6 destinations only. This destination has no IPv6 address.” Over SOCKS5 the connection fails with a network-unreachable reply, because SOCKS5 has no field for a reason.
With SOCKS5, let the proxy resolve hostnames: use socks5h://, or --socks5-hostname in curl. A client that resolves names itself may send the site's IPv4 address, which an IPv6 exit cannot reach even when the site also publishes IPv6.
What does TrueProxies Datacenter IPv6 include?
These facts come from the live catalog on September 29, 2026. The Datacenter IPv6 page shows current prices.
| Feature | Datacenter IPv6 |
|---|---|
| Addresses | A private /48 for each service |
| Location | One city per plan, chosen at checkout |
| Default behavior | A new IPv6 address for each new connection |
| Sticky sessions | Add a session token; set how long it holds with a lifetime in seconds |
| Plan speeds | 25, 70, 175 or 400 Mbps |
| Plan terms | Daily, 7-day or monthly |
| Starting price | $3.99 a day at 25 Mbps, with no per-GB charge |
| Open connections | Up to 2,000 |
| Protocols | HTTP (port 8080), HTTPS (port 8443) and SOCKS5 (port 1080) |
| Authentication | Username and password, trusted IP, or both |
| Reaches | IPv6 destinations only |
| Renewal | Raises an invoice; nothing is charged automatically |
| Free trial | Not available for Datacenter IPv6 |
When should you choose an IPv4 proxy instead?
- Your target has no AAAA record, or a page you render loads IPv4-only resources that you need.
- You need residential origin: addresses that consumer internet providers assign to homes, not hosting addresses. Residential IPv4 Unlimited and Residential IPv4 GB-based provide that.
- You need to choose a country per request (both Residential IPv4 products), or a city, region or ASN per request (Residential IPv4 GB-based only). Datacenter IPv6 is one city per plan.
- You want to test before paying. The free trial covers Residential IPv4 Unlimited only, for 1 hour at 10 Mbps. Datacenter IPv6 has no trial.
If every target passes an IPv6 check and hosted addresses are acceptable for the work, Datacenter IPv6 costs less per Mbps on our price list: $3.99 a day at 25 Mbps, against $12.30 a day for Residential IPv4 Unlimited at 25 Mbps (checked September 29, 2026). If not, start with Residential IPv4. The IPv6 proxies overview compares the IPv6 options side by side.