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Hushed lets you add a Castro Valley phone number to your existing phone

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It’s easy to get a secondary phone number that shows you’re calling from a Castro Valley area code

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Choose your phone number

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Pick a flexible phone plan

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Start talking and texting

Castro Valley is home of the 510 area code

More information about Castro Valley

Within area code 510, Castro Valley is located in Alameda County, California. This area is one of the most populated communities in the state. This valley is named after Don Guillermo Castro who was a famous Californian ranchero and landowner in the area now known as Castro Valley.

In addition to Castro Valley, Hushed services and includes Union City, San Leandro, Richmond, San Lorenzo, San Pablo, and Oakland.

Places to visit in Castro Valley

Visiting Castro Valley & area?

Once you are connected with your new phone number you may want to check out these places.

  • The Cannery Kitchen and Tap - This highly rated restaurant is located on Castro Valley Boulevard and is a great place to eat traditional American cuisine.
  • Norman's Grill - This restaurant specializes in steaks and everything grilled. If you love burgers, they are a menu highlight at Norman's Grill.
  • Pad Thai Cuisine - This restaurant is known for the authentic Thai cuisine that it offers and its extensive menu.
  • More dining out in Castro Valley
Things to do in Castro Valley

Must-see spots in Castro Valley & area?

  • Lake Chabot Regional Park - This regional park is full of lush green spaces and features activities like hiking, boating and fishing.
  • Anthony Chabot Regional Park - This park has a marksmanship range for anyone who likes to practice shooting in a safe environment.
  • Cull Canyon Regional Recreation Area - This area is a perfect place to relax with your family. It offers a seasonal swimming lagoon and a sandy beach.
  • More things to do in Castro Valley

Need a temporary Castro Valley phone number?

phone numbers start at US $2.99

Need prepaid mobile data for Castro Valley?

Find the best data plans with

Castro Valley area code phone numbers starting at US $2.99


Our most flexible plans bundled with local minutes and SMS usage.

Starting at US $2.99

  • Bundled minutes/SMS for local calling and texting*
  • 7, 30, 90, and 365 Day plans available - extend your number at any time!
  • One-time payment. Perfect for any short term or long term use case



For international calling capabilities with your Hushed number.

Starting at US $6.99

  • Call internationally anywhere in the world at great rates!
  • Uses Hushed Credits directly from your account balance
  • International texting capabilities available with US/CAN numbers

Ready to choose your Castro Valley phone number?

Call and text like you’re a Castro Valley local, and keep the number as long as you want.

Looking for a second phone number that’s not within the 510 area code?

Hushed has temporary phone numbers in 300+ area codes. Search other area codes