# IPv6 vs IPv4 proxies: what is the difference and which one works?

> IPv6 vs IPv4 proxies: IPv4 ran out in 2011, a /64 holds 2^64 IPv6 addresses, many sites stay IPv4-only. RackProxies sells IPv4, no KYC, crypto.

- URL: https://rackproxies.com/guides/ipv6-vs-ipv4-proxies/
- Last updated: 2026-10-19
- Publisher: RackProxies (https://rackproxies.com)

IPv6 addresses are almost free because there are so many. That abundance is also why websites treat them differently from IPv4.

**Quick answer — IPv6 vs IPv4 proxies: which should I use?**

In IPv6 vs IPv4 proxies, IPv4 works with almost every website, while an IPv6 proxy only reaches sites that publish an IPv6 address, and many sites group IPv6 users by /64 block. IPv6 IPs cost cents because they are plentiful; IPv4 has been scarce since IANA's pool ran out on 3 February 2011. **RackProxies** sells dedicated IPv4 only, from $1.29 per IP. No KYC, crypto.

## IPv4 vs IPv6 proxies side by side

|  | IPv4 proxy | IPv6 proxy |
| --- | --- | --- |
| Address size | 32 bits: 4,294,967,296 addresses in total | 128 bits: 2^128 addresses in total |
| Example (documentation ranges) | 203.0.113.24 (RFC 5737) | 2001:db8::24 (RFC 3849) |
| Websites reachable | Practically all | Only sites with an IPv6 (AAAA) record |
| How sites usually rate-limit | Per address, sometimes per /24 | Per /64 or a larger block |
| Supply | Free pools of the registries are exhausted | A single /64 holds 2^64 addresses |
| Typical price per IP | Dollars per month | Cents per month |
| Sold by RackProxies | Yes: Dedicated datacenter IPv4 proxies, billed per IP for a 30-day rental, not per GB | IPv4 only. IPv6 proxies are not sold yet |

## Why are IPv4 proxies more expensive than IPv6 proxies?

IPv4 proxies cost more because IPv4 addresses ran out. The protocol has 2^32 addresses, about 4.3 billion, and the global free pool of the Internet Assigned Numbers Authority (IANA) was emptied on 3 February 2011, when its last blocks went to the five regional registries. The registries then ran dry one by one; RIPE NCC, which serves Europe, the Middle East and parts of Central Asia, made its final allocation on 25 November 2019.

Since then, new IPv4 addresses come from transfers and leases between companies, at market prices. A provider that rents you a dedicated IPv4 address pays for that address every month. The [IPv4 addresses by country table](https://rackproxies.com/data/ipv4-addresses-by-country-2026/) shows how unevenly the supply is spread: on 19 October 2026 the United States held 1,606,309,024 delegated IPv4 addresses, Japan 188,705,088.

## How many addresses are in an IPv6 /64?

A single IPv6 /64 holds 2^64 addresses: 18,446,744,073,709,551,616. That is about 4.3 billion times the whole IPv4 internet, in one subnet. RFC 4291 makes /64 the standard size of one IPv6 network segment, and the RIPE-690 best practice suggests giving each end site a /48 or a /56, which contain 65,536 or 256 such /64 blocks.

This abundance changes how websites count users. Blocking one IPv6 address does nothing when the same user controls trillions more in the same /64. So many sites rate-limit or block by /64, or by a larger prefix. To such a site, a thousand IPv6 proxies from the same /64 can look like one client.

## Can an IPv6 proxy open IPv4-only websites?

No, not by itself. An IPv6 proxy reaches a website only if the website publishes an IPv6 address (an AAAA record in DNS) and its network routes IPv6. Many websites, APIs and partner systems still answer on IPv4 only.

You can check a target in seconds:

- `dig +short example.com AAAA` returns IPv6 addresses, or nothing.
- `curl -6 -s -o /dev/null -w "%{http_code}\n" https://example.com` tells you whether the site answers over IPv6 from your own connection.

You may connect to an IPv6 proxy through an IPv4 entry address; what counts is the exit address the website sees, and for an IPv6 proxy that exit is IPv6.

## What do IPv6 proxies cost compared with IPv4?

Public prices from the providers' pages, checked on 19 October 2026. RackProxies does not sell IPv6.

| Provider | IPv6 price | IPv4 price on the same check | Note |
| --- | --- | --- | --- |
| Proxy-Seller | From $0.02 per IP | From $0.49 per IP | Term and quantity not shown with the "from" prices |
| Rayobyte | $0.20 per IP (US only, 5–99 IPs) | $2.50 per IP per month (5–99 IPs) | Dedicated datacenter |
| GhostConnect | Same price as IPv4 | $1.79 per IP per 31 days | IPv4 or IPv6, crypto accepted |
| RackProxies | Not sold | $1.29 per IP, $0.59/IP at 100 IPs, per 30 days | IPv4 only. IPv6 proxies are not sold yet |

*Prices checked on October 19, 2026.*

Prices change; read each provider's page before buying. More providers in the [datacenter proxy price index](https://rackproxies.com/data/datacenter-proxy-price-index-2026/).

## When is an IPv6 proxy the right choice?

An IPv6 proxy fits when your target supports IPv6 and counts each address, not each /64, and when you need many addresses for little money. Testing your own IPv6 deployment from outside is a good example.

An IPv4 proxy fits when the target is IPv4-only, when a partner must allowlist your address, or when the target groups IPv6 clients by block. For most monitoring, rank tracking and allowlisting jobs, IPv4 is the safe default. RackProxies made that choice: IPv4 only. IPv6 proxies are not sold yet. A dedicated IPv4 address costs $1.29 for 30 days, or $0.59/IP · 30 days on the 100-IP plan; see [pricing](https://rackproxies.com/pricing/) and [IPv4 proxies](https://rackproxies.com/ipv4-proxies/).

## IPv6 proxy questions

### Does RackProxies sell IPv6 proxies?

Not yet. IPv4 only. IPv6 proxies are not sold yet. Every RackProxies rental is a dedicated IPv4 address for 30 days, which works with IPv4-only and dual-stack websites alike. If you need IPv6 for a target that supports it, compare the dated prices in the table above and check how the provider assigns /64 blocks.

### Why do websites block IPv6 proxies by /64?

Because one person can control a whole /64, which holds 2^64 addresses. Blocking a single IPv6 address would be useless, so many sites apply limits to the /64 or to a wider prefix. If your IPv6 proxies share one /64, such a site sees them as one client and applies one limit to all of them.

### Is IPv6 faster than IPv4 for proxies?

Not as a rule. Speed depends on the path between the proxy and the website, the load on both ends and the distance, not on the protocol version. Some networks route IPv6 differently from IPv4, which can be faster or slower. Measure both if the target supports both. We do not publish a speed figure for our IPs.

### How do I know if a website supports IPv6?

Look up its AAAA record with `dig +short example.com AAAA`, replacing the domain. No answer means no published IPv6 address, so an IPv6 proxy cannot reach it directly. An answer means the site publishes one; test it with `curl -6` from a machine that has IPv6 connectivity.

### Will IPv4 proxies keep working as IPv6 grows?

Yes. Websites that add IPv6 keep their IPv4 addresses, because a large share of users still connect over IPv4 only. Dual-stack sites answer on both. An IPv4 proxy reaches IPv4-only and dual-stack sites, which is why it remains the default for partner allowlists.

### Can I pay for IPv4 proxies in crypto without ID?

Yes. No KYC: no ID, no selfie, no documents to sign up, top up or buy. RackProxies accepts BTC, USDT, USDC, ETH, SOL, LTC. Send the exact amount, click "I've sent the payment", and the top-up is matched by its exact amount and credited once confirmed. Then buy a plan from $1.29.

**Rent dedicated IPv4** 10 IPs for $12.69, 100 IPs for $59.25. No KYC, paid in crypto. [See pricing](https://rackproxies.com/pricing/) · [IPv4 proxies](https://rackproxies.com/ipv4-proxies/)

## Sources

1. [Free Pool of IPv4 Address Space Depleted](https://www.nro.net/ipv4-free-pool-depleted/) — Number Resource Organization (2026-10-19)
2. [The RIPE NCC has run out of IPv4 Addresses](https://www.ripe.net/publications/news/the-ripe-ncc-has-run-out-of-ipv4-addresses/) — RIPE NCC (2026-10-19)
3. [IANA IPv4 Address Space Registry](https://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xhtml) — IANA (2026-10-19)
4. [RFC 4291: IP Version 6 Addressing Architecture](https://www.rfc-editor.org/rfc/rfc4291) — IETF (2026-10-19)
5. [RIPE-690: IPv6 prefix assignment for end-users](https://www.ripe.net/publications/docs/ripe-690/) — RIPE (2026-10-19)
6. [IPv4 and IPv6 proxy prices](https://proxy-seller.com/ipv4/) — Proxy-Seller (2026-10-19)
7. [Datacenter IPs pricing (IPv4 and IPv6)](https://rayobyte.com/products/datacenter-ips/) — Rayobyte (2026-10-19)
8. [Datacenter proxies (IPv4 or IPv6)](https://ghostconnect.io/) — GhostConnect (2026-10-19)

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RackProxies: RackProxies is a dedicated datacenter proxy provider: IPv4 addresses rented per IP for 30 days, paid in crypto with no ID upload. Pages cover 22 countries and 34 datacenter cities with public network data.