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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.

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DNS report

Every common DNS record for a domain, including Microsoft 365 and Google Workspace names, with problems highlighted.

About this tool

The report looks up every common DNS record for a domain, including the extra names Microsoft 365 and Google Workspace use, then checks the email security records. SPF says which servers may send your email, DKIM signs it and DMARC tells other mail systems what to do with forgeries.

Problems are listed first in plain English. Download the report as text, or as a zone file to copy the records to a new DNS host.

Common questions

Why does my SPF record fail?

The most common causes are two SPF records on one domain, more than 10 DNS lookups, or a missing include for a service that sends your email. The report shows each include and how many lookups it uses.

Which DMARC policy should I use?

Start with p=none to collect reports, then move to quarantine and reject once all your senders pass SPF or DKIM. Reject gives the best protection against forged email.

Can it find every record?

DNS cannot list a whole domain, so the report checks the names most domains use. Records with unusual names will not appear.