Broadband internet subscribers with the ISP Prodigy are moving elsewhere after the service was taken offline by wholesaler BT.
The telecoms giant has set up a 'walled garden' for those attempting to get online with Prodigy, allowing them to pick up a Migration Authorisation Code (MAC) and move to another provider.
Customers who have found it difficult attempting to acquire their MAC have been urged to get in contact with BT.
According to ISPreview: "It's believed that the ISP may have been in financial difficulty and unable to pay its bills, unfortunately nobody seems able to successfully contact them for confirmation or comment.
"Typically poorly maintained smaller ISPs are likely to bear the brunt of the UK's aggressively competitive market."
Meanwhile, broadband comparison site thinkbroadband.com has urged broadband users to think carefully before rushing to sign a deal with another provider.