A company spokesperson said vandalism was to blame for the service interruption in the Fishtown and Kensington neighborhoods.
Physical damage severed a fiberoptic cable in the Kensington section, spokesperson Jen Bilotta said.
She said the incident has been reported to police.
Bilotta added that the bulk of customers who lost cable had it back before kickoff.
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Eagles fans in parts of the city were making their unhappiness known during the hours-long outage: