Phone prefix +1-510300
Phone prefix: +1510300
This prefix is distributed within the state California
The largest city within this prefix is Hayward, CA
District: Alameda
The largest organization: U.s. Telepacific Corp.
Time Zone: Pacific
Winter time: UTC-8
Summer time: UTC-7
The largest city within the prefix of +1-510300.... numbers is shown below
Hayward, CA.