Virgin Media Ireland says broadband and phone services have been restored for customers after a major outage last night.
Thousands of customers took to social media from around 9pm to highlight the issue, which appeared to have affected customers nationwide.
According to the network, the issue was resolved shortly after midnight.
Midnight update: Engineers have resolved the issue. We regret any inconvenience caused. Many thanks for your patience tonight. Daryll— Virgin Media Ireland (@VirginMediaIE) December 7, 2016
Further tweets indicated it was "taking a little time to get some people back online", and customers still having problems were advised to try rebooting their modem.
There were, however, some reports from customers still having issues this morning, while Virgin Media's own website appeared to be down.
— Tom Lambert (@tlambertie) December 7, 2016
8 hours later and internet still down. "Which coloured wire do we cut, boss?" "Eh, try the blue one..." #virginmedia— Geoffrey OB (@gob872) December 7, 2016
what is happening in Ireland? no broadband since last night #virginmedia— MegaDK (@MegaDK2) December 7, 2016
While the company has not identified the cause of the problem, numerous social media users pointed out it appears to have been a result of issues with the network's DNS servers.
Some customers were able to access the Internet after manually changing the DNS address on their devices to an external one.
DNS stands for Domain Name System, which is a key internet system that allows familiar web addresses to be converted into numerical IP addresses and therefore located by a web browser.