The web sites of HSBC, ITV and Waitrose had been amongst these hit by a widespread outage that briefly brought about disruption on Thursday afternoon.
Major on-line banking companies – together with Barclays, TSB, the Bank of Scotland, Tesco Bank and Sainsbury’s Bank – had been both fully or partially inaccessible for a brief interval.
Airbnb, the PlayStation Network and Steam additionally skilled the non permanent glitch, with some displaying customers a DNS error.
Unconfirmed experiences recommend the issue could also be linked to a efficiency product provided by Akamai, an American agency, which started investigating points simply after 5pm UK time.
Its Edge DNS service is designed to enhance loading instances and fight assaults, utilizing a community of servers dotted all over the world.
Later, Akamai tweeted: “We have implemented a fix for this issue, and based on current observations, the service is resuming normal operations.
“We are continuing to monitor the situation and can confirm this was not a result of a cyber-attack on the Akamai platform.”
The incident follows an analogous outage six weeks in the past, which affected distinguished web sites together with gov.uk.
The US-based Fastly mentioned the problems skilled on 8 June had been right down to an “undiscovered software bug” in its system, which was triggered by a single unnamed customer who up to date their settings.