Vodafone customers crossed the UK person reported problems with their broadband internet.
More than 2,700 users person complained of issues, according to the website Downdetector, which tracks problems with online services.
On Twitter, Vodafone said it was investigating and "dedicated teams" were moving to hole the issue.
It follows issues astatine Virgin Media O2 on Tuesday, erstwhile much than 50,000 broadband customers reported problems.