94552Castro Valley, CA
Prospecting data for 94552: Castro Valley, CA
Zip 94552 in Castro Valley, California has about 2,240 homeowners. About 890 have a connected mobile phone and 370 of those are clear of the National Do Not Call Registry.
Absentee owners 94552
Data as of 2026-09
- Absentee owners200
- Mailable address98%190
- Connected mobile6%under 100
- Email on file7%under 100
- Mobile and DNC clear2%under 100
Rounded floors, not promises.
| Population | 14,900 |
|---|---|
| Housing units | 5,110 |
| Owner occupied | 91% of occupied homes |
| Renter occupied | 9% of occupied homes |
| Median household income | $163,000 |
| Median age | 46.5 |
| Built before 1970 | 18% of homes |
| Built 2000 or later | 12% of homes |
| Median mortgage payment | $3,220 a month |
| Time zone | PST |
| Area code | 510 |
Census figures are rounded ACS 5-year estimates for the zip code tabulation area.
What this means for each channel
Direct mail reaches almost everyone: 94% of 94552 homeowners have a deliverable mailing address. Mail is the only channel with no consent requirement, so it is the floor of any Castro Valley campaign.
Calling and texting reach about 40% with a connected mobile, but only 16% once you remove numbers on the National Do Not Call Registry. Texting a cold list also needs prior express written consent under the TCPA, so the DNC-clear figure is a calling figure, not a texting figure. See cold calling laws by state.
Email reaches about 47%. Cold email to consumers is legal under CAN-SPAM with an opt-out and a physical address, but deliverability on purchased consumer email is poor; treat it as a supporting touch.
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