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Mailboxes in Castro Valley

2 blue boxes and 2 post offices in Castro Valley, California — locations, plate numbers and last pickup times.

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Blue boxes (2)

• Blue box in Castro Valley
• Blue box in Castro Valley

Post offices (2)

• Castro Valley Branch Post Office
  20283 Santa Maria Avenue
• PostalAnnex
  3056 Castro Valley Boulevard, Castro Valley, CA 94546-5510

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