The web sites of HSBC, ITV and Waitrose have been amongst these hit by a widespread outage that briefly induced 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 – have been both completely or partially inaccessible for a brief interval.
Airbnb, the PlayStation Community and Steam additionally skilled the short-term glitch, with some displaying customers a DNS error.
Unconfirmed studies 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 occasions and fight assaults, utilizing a community of servers dotted world wide.
Later, Akamai tweeted: “We now have carried out a repair for this situation, and based mostly on present observations, the service is resuming regular operations.
“We’re persevering with to watch the scenario and may verify 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 outstanding web sites together with gov.uk.
The US-based Fastly stated the problems skilled on 8 June have been right down to an “undiscovered software program bug” in its system, which was triggered by a single unnamed buyer who up to date their settings.