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WhatsApp IDs cause of 'biggest' outage

Sunday, 23 Feb 2014 | 1:50 PM ET

WhatsApp founder Jan Koum on Sunday issued an apology and blamed a network router for Saturday's outage of the mobile messaging app.

"We are sorry about the downtime," wrote Koum. "It has been our longest and biggest outage in years. It was caused by a network router fault which cascaded into our servers."

WhatsApp screens for Android
Source: Google Play
WhatsApp screens for Android

"We worked with our service provider on resolving the issue and making sure it will not happen again."

(Read more: WhatsApp back up after extended outage)

WhatsApp was down for more than three hours on Saturday just days after Facebook bought it for $19 billion.

The five-year old company currently has about 450 million users worldwide and is the leading smartphone-based messaging app.

Reuters

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