Speed and call quality testMy IP addressIP subnet calculatorDNS reportWhoIs lookupRemote support

Internet and network

Speed and call quality testTest delay, jitter and speed, with a focus on phone calls.My IP addressYour public IPv4 and IPv6 addresses, provider and address range.WhoIs lookupWho owns a domain or IP address, when it expires, and its DNS.DNS reportEvery DNS record for a domain, with email setup checked.IP subnet calculatorWork out a network's range, mask and hosts, and split it into subnets.

Computers and devices

Update checkIs this computer, phone and browser up to date? With links to update.Camera and mic testCheck your webcam and microphone before a call.Test print pagePrint an A4 page to check a printer: edges, text, line art and colours.

Make and print

Clean textStrip hidden characters, smart quotes and odd spaces from pasted text.QR code makerMake a QR code for a link, contact or message. Nothing leaves your browser.Wi-Fi QR posterPrint an A4 poster that lets guests join your Wi-Fi by scanning.

Surftec support

Remote supportLet a Surftec engineer connect to your computer to help you.All workingA full-screen confirmation that everything is up and running.

Surftec

Surftec websiteServices, news and how to contact Surftec
Cloud Tools
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Surftec customers will be recognised automatically when they use these tools from their office network.

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My IP address

Your public IPv4 and IPv6 addresses, who provides them, and whether you have a single address or a range.

IPv4 address

Checking

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IPv6 address

Checking

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Traceroute back to you

Takes up to 30 seconds. Many routers, including most home routers, don't answer, so the last step often shows as no reply.

Using a script or command line

Get just the address as text:

curl https://cloud.surftec.com/myip/?format=text
curl https://ip4.surftec.cloud/myip/api.php?format=text
curl https://ip6.surftec.cloud/myip/api.php?format=text
How this works

A web page normally reaches a server over IPv6 or IPv4, not both, so it can only see one address. This page asks two extra addresses, one that only answers over IPv4 and one that only answers over IPv6, so you see both.

If IPv6 shows Not available, your internet connection or device is not using IPv6. That is common and not a fault.

This page connected to us from 216.73.217.169.

About this tool

Your public IP address is the address the internet sees for your network. Support teams and suppliers often ask for it to allow your office through a firewall or to check a fault. This page shows both your IPv4 and IPv6 addresses, the provider that owns them and the size of the range your network uses.

For scripts, curl https://cloud.surftec.com/myip/?format=text returns just the address.

Common questions

Why do I have both an IPv4 and an IPv6 address?

Most networks now carry both. IPv4 addresses are usually shared by everything in your office; IPv6 gives each device its own. Many services use whichever works first.

Is my IP address fixed?

Business broadband usually has a fixed (static) address. Home broadband and mobile data often change address from time to time. Your provider can confirm which you have.