What is a Proxy Address?

What is a proxy address?

A proxy address is the network location your device connects to before its traffic reaches a website. It is written as a host and a port joined by a colon, either an IP address such as 203.0.113.45:8080 or a hostname such as gate.example.com:3128. The host tells your software which machine to reach. The port tells it which service on that machine handles proxy requests. Enter that proxy address into a browser, an operating system or a script, and the destination site records the proxy IP rather than yours. The number on its own reveals nothing about the protocol, the country or the address type.

Is a proxy address the same as proxyAddresses in Microsoft 365?

No, and this is the most common mix-up on the topic. In Active Directory and Microsoft Entra ID, proxyAddresses is a multi-value directory attribute that stores a mailbox’s email aliases, which can be SMTP, X500 or SIP entries written with prefixes such as SMTP: for the primary address. Microsoft defines it as the address by which an Exchange recipient object is recognised in a foreign mail system, and describes how Entra ID recalculates those values during synchronisation. It has no port. It performs no routing, and you cannot type it into a browser.

What does a proxy address look like?

Two parts of a proxy address are mandatory and two are optional. The mandatory pair is host and port, for example 203.0.113.45:8080. Providers using credential authentication supply four values, often written as user:password@203.0.113.45:8080, although most interfaces split them into separate fields. Addresses inside 192.168.0.0/16, 10.0.0.0/8 and 172.16.0.0/12 are private ranges and cannot serve as a public proxy address, which is why the examples here use 203.0.113.0/24, a block the IETF reserved for documentation in RFC 5737. Watch the leading zeros. Some libraries parse 010 as octal, not as ten.

Which port numbers do proxy addresses use?

Ports 8080 and 3128 are the usual defaults for HTTP proxies, with 3128 being the out-of-the-box port for Squid, while 1080 is the traditional port for SOCKS. None of this is binding. A provider can serve SOCKS5 on 8080 or HTTP on port 40001, so the port number is not a reliable indicator of protocol and only the provider’s documentation is. Port numbers run from 0 to 65535. Providers frequently assign a different port to each proxy address, which is how a single hostname can front thousands of separate proxies.

HTTP or SOCKS5: which protocol does your proxy address use?

An HTTP proxy reads the request at the application layer and, for HTTPS traffic, opens a tunnel using the CONNECT method defined in RFC 9110. A SOCKS5 proxy, specified in RFC 1928 in 1996, works one layer lower and forwards TCP and UDP without inspecting the payload, with its username-and-password authentication defined separately in RFC 1929. The practical consequence is simple. The same proxy address may work over one protocol and fail over the other. Browser extensions are a common example, including our own ProxyControl, which supports HTTP(S) only.

What does a website actually see when you use a proxy address?

The site sees the proxy IP as the source of the connection, and that is not the whole picture. Proxies divide into three groups by what they disclose. Transparent proxies forward your original IP in an X-Forwarded-For header, standardised as Forwarded in RFC 7239, and usually add a Via header too. Anonymous proxies signal that a proxy is in use without identifying the client. Elite proxies send neither. Anti-fraud systems also read the autonomous system number behind the IP, so a proxy address can be header-clean and still be classified as datacentre traffic.

Why do some proxy addresses get flagged immediately?

The network behind an address gets checked before anything else does. In its 2025 Radar Year in Review, Cloudflare reported that 40% of global bot traffic originated in the United States and that Amazon Web Services and Google Cloud between them accounted for a quarter of all bot traffic worldwide. Anti-bot systems weight hosting ASNs accordingly. That is why an identical script can run cleanly from a home connection and hit a challenge page from a rented server. The browser fingerprint has not changed. Only the network announcing the proxy address has.

Is IP reputation still a reliable signal?

Less than it was, and the shift has been measured. GreyNoise, working with IPinfo, examined four billion malicious sessions between 29 November 2025 and 27 February 2026 and found that 39% of unique attacking IPs came from residential networks, while 78% appeared in only one or two sessions before vanishing, faster than any reputation feed updates. About 89.7% stayed active for under a month, as BleepingComputer reported. GreyNoise concludes that detection has to shift from where traffic originates to what that traffic actually does.

Where do residential proxy addresses come from?

Not always from a consenting household. On 28 January 2026 Google Threat Intelligence Group disrupted IPIDEA, a network it described as one of the largest residential proxy operations in the world, assembled in part from devices enrolled through SDKs bundled into free applications. GTIG chief analyst John Hultquist called such networks “a pervasive tool” used from espionage to criminal schemes, and Google observed more than 550 tracked threat groups routing through IPIDEA exit nodes in a single week. Ask a provider where its addresses come from. The answer tells you what reputation you are buying.

How much web traffic is automated, and why does it matter here?

Detection budgets scale with the problem, and the problem is now most of the web. The 2026 Bad Bot Report from Thales and Imperva, its thirteenth annual edition, put automated traffic above 53% of all web requests during 2025, up from 51% a year earlier, with bad bots at 40% and 27% of bot attacks aimed straight at APIs. DataDome’s 2025 Global Bot Security Report, which tested more than 16,900 sites, found only 2.8% fully protected, down from 8.4%. Protection is uneven. That unevenness is why one proxy address behaves differently on different targets.

Should you choose an IPv4 or an IPv6 proxy address?

IPv4 addresses are scarce and priced accordingly. IPXO puts 2026 purchase prices at roughly $11 to $32 per address with monthly lease rates around $0.35, which is why an IPv6 proxy address costs a fraction as much. Support is the catch. The Internet Society recorded native IPv6 access to Google passing 50% on 28 March 2026, yet Cloudflare measured fewer than a third of dual-stack requests worldwide actually travelling over IPv6. Plenty of targets still accept IPv4 only. Check your destination before buying.

Does a proxy address hide everything?

Three leaks defeat an otherwise correct configuration. WebRTC can expose your real address through STUN requests that bypass browser proxy settings. DNS queries often travel outside an HTTP proxy unless the client is told to resolve names remotely. The third leak is the least obvious, because an IPv4-only proxy address carries no IPv6 traffic, so on a dual-stack connection the site receives your genuine IPv6 address. With native IPv6 now past half of Google’s users, that is no longer an edge case. Test all three after setup, not after the first block.

Why is a home IP address often shared with strangers?

Carrier-grade NAT is the reason. Operators short of IPv4 space place many subscribers behind a single public address, and IPv4.Global notes that roughly 4 million addresses are reserved for this shared use. A subscriber with an exclusive address has 64,512 ports available, whereas behind CGNAT that allocation can fall to about 1,024. So your home address is probably shared with people whose behaviour affects its reputation, and a dedicated proxy address is one of the few ways to control what a destination site associates with your traffic.

How do you get a proxy address?

Although many people rely on paid services for reliable global proxies, there isn’t one sole method on how to get proxy addresses. Sometimes it depends on where you are, the device you’re using, or your general intent. Free public lists exist. They are typically open proxies of unknown ownership with shared, already-damaged reputations. Depending on your specific needs and use-case circumstances, there are several key points you’ll want to consider.

What is my proxy address?

First and foremost, we’ll want to start with the device you’re using for the next steps in finding your active proxy address. Aside from the device, it also depends on the source of your proxy address, whether it’s software or browser-related. These steps show the proxy your system is configured to use. That is not the same as the public IP a website records for you, which you confirm by requesting an IP-echo service through the proxy and comparing the result with your real address.

Windows

You can easily search for your current proxy settings by entering the word “proxy” in the Windows Start menu. This is where you can find all of your manual proxy settings, and your LAN settings will show you this information as well. On Windows 11 the path runs through Settings, then Network & internet, then Proxy, where manual setup shows the address and port. There is also a second setting. From a terminal, netsh winhttp show proxy returns the system-wide WinHTTP configuration, which services may use instead of the per-user one.

Mac

On macOS Ventura and later, open System Settings, choose Network, select your active service such as Wi-Fi, click Details and then Proxies. Older releases put the same panel under System Preferences, Network, Advanced. The list lets you switch between Web Proxy (HTTP), Secure Web Proxy (HTTPS) and SOCKS Proxy, each with its own server and port fields. Terminal is quicker when you manage several addresses. Running networksetup -getwebproxy Wi-Fi prints the same proxy address and port without opening the interface.

Browser settings

Whether you’re using Brave, Google Chrome, or Mozilla Firefox, you can find proxy details in the individual browser settings. To help streamline this process, you can follow the same steps above by searching “proxy” in the settings tab of your browser. Chrome and Brave then hand you off to the operating system’s proxy panel, so a change there affects every application on the machine. Firefox behaves differently. It keeps its own settings under Network Settings and can use a proxy address independently of the system.

FAQ

Why is the proxy field empty when traffic is clearly being routed?

Because a PAC file is doing the work. A proxy auto-config script returns a different proxy, or DIRECT, depending on the URL, and WPAD locates that script automatically over DHCP or DNS. The proxy address sits inside the script, not in the settings dialog.

What is an open proxy address?

An open proxy accepts connections from anyone, without authentication. That describes access control, not anonymity. Strangers use the same proxy address at once, its reputation sits outside your control, and the operator can log or alter the traffic. Many blocklists flag known open proxies on sight.

Static or rotating: which type of proxy address do you need?

Ask what breaks if the address changes mid-task. A static proxy address holds one IP for the whole order, which logged-in sessions and multi-step forms need. A rotating proxy address changes per request or on a timer, which suits bulk collection. Rotation inherits the previous user’s history.

How do you check that a proxy address actually works?

Run three checks. Confirm the exit IP through an IP-echo service and compare it with your real address. Verify geolocation in more than one database, because records disagree. Then test for WebRTC, DNS and IPv6 leaks in the browser profile you will actually use.

What should you check before buying a proxy address?

Three things matter. The address type and the ASN it is announced from, the protocol and port your provider supports, and whether the IP is yours alone or shared. Price per address is the least useful number, because a blocked address costs more per successful request.

How do I find my proxy address?

This depends on the device or software that you’re using. Proxies on Windows can be found by searching “proxy” in the start menu. Mac users open System Settings, then Network, then Details and Proxies. Each browser shows the same information in its own settings, reachable through the search bar there.

What is a proxy address example?

A proxy address could look like 203.0.113.45, and with a port appended it becomes 203.0.113.45:8080. Credential authentication makes the full string read user:password@203.0.113.45:8080. Addresses beginning 192.168, 10. or 172.16 to 172.31 are private ranges and cannot work as a public proxy address.

What is my IP location proxy address?

This can be changed and varies across many different global locations. Proxy software usually provides this information alongside the IP address and port number. Note that a provider states the registered location, while a site reads it from a geolocation database that may be outdated.

What is the difference between a proxy and a real IP?

Your real IP is the address your internet provider assigns to your connection. A proxy address is a different IP, in a different location, that the destination site records instead. Behind carrier-grade NAT your real address may be shared, whereas a dedicated proxy address is yours alone.

Can several devices use the same proxy address at once?

Usually yes. With username-and-password authentication, plans cap concurrent connections rather than devices, so one proxy address works on a laptop, a phone and a server together. With IP allowlisting, each device’s own public IP has to be authorised first, which mobile connections break.