The web sites of HSBC, ITV and Waitrose had been amongst these hit by a widespread outage that briefly triggered disruption on Thursday afternoon.
Main on-line banking providers – together with Barclays, TSB, the Financial institution of Scotland, Tesco Financial institution and Sainsbury’s Financial institution – had been both solely or partially inaccessible for a brief interval.
Airbnb, the PlayStation Community and Steam additionally skilled the non permanent glitch, with some displaying customers a DNS error.
Unconfirmed reviews 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 world wide.
Later, Akamai tweeted: “We’ve got carried out a repair for this subject, and based mostly on present observations, the service is resuming regular operations.
“We’re persevering with to watch the scenario and might affirm this was not a results 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 program bug” in its system which was triggered by a single unnamed customer who up to date their settings.