Broadband provider

Cuckoo broadband

Customers can call 0330 912 9955 for help and faults.

In short

Lines are open Mon to Fri 9am to 7.30pm, Sat and Sun 9am to 4pm (checked 24 October 2026). Cuckoo is run by Onestream. Our Cuckoo status page shows whether Cuckoo is down right now and any problems in the last 30 days. No Cuckoo broadband deals are listed on 30 October 2026, so put in your postcode to see who sells broadband at your address. Cuckoo sells broadband over CityFibre's full fibre network and over Openreach.

Cuckoo contact number

Cuckoo is run by Onestream.

Help and faults: 0330 912 9955; Mon to Fri 9am to 7.30pm, Sat and Sun 9am to 4pm; Sundays: technical help only.

From Cuckoo's contact page, checked 24 October 2026. Numbers starting 03 cost the same as calls to 01 and 02 numbers and count towards any inclusive minutes.

Tools for Cuckoo customers

Speed test

Test your Cuckoo speed

Measure your line, compare it against what Cuckoo promised, and see if a faster package is available at your address.

Run the speed test

Troubleshooter

Fix Cuckoo problems

Conversational diagnostic: outage check, line probe, fix list, and switch options if it's not worth waiting.

Start the troubleshooter

Outage check

Is Cuckoo down right now?

Live status, plus the last 30 days of outages.

Check the live status

Cuckoo questions

Can I get Cuckoo broadband?

We don't have Cuckoo deals to show right now. Put in your postcode to see which providers sell broadband at your address.

What is Cuckoo's phone number?

Call 0330 912 9955 for help and faults. Cuckoo is run by Onestream.

Is Cuckoo down?

Our Cuckoo status page shows any problem Cuckoo has reported and the last 30 days. Check Cuckoo's status.

What network does Cuckoo use?

Cuckoo sells broadband over CityFibre's full fibre network and over Openreach.