Comcast has temporarily opened its Xfinitiy WiFi hotspot network to non-customers in the North Bay to help residents and emergency crews recover from Sunday’s earthquake.

Until midnight Tuesday, non-subscribers can get free Internet access by looking for the “xfinitywifi” network and choosing the link for “Not a Comcast customer?” at the bottom of the sign-in page.

They can chose the “California Earthquake Recovery” option from a drop down list to connect to the network. The sessions need to be renewed every hour.

Comcast normally makes its network available only to subscribers, but opened the network Sunday night in the North Bay, including Napa, Vallejo, Fairfield and Saint Helena, said spokesman Bryan Byrd.

The company operates thousands of those hotspots in California and has begun expanding the network by activating secondary channels on certain home wireless gateway modems leased to residential customers.

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