94546Castro Valley, CA
Prospecting data for 94546: Castro Valley, CA
Zip 94546 in Castro Valley, California has about 6,420 homeowners. About 2,180 have a connected mobile phone and 980 of those are clear of the National Do Not Call Registry.
Absentee owners 94546
Data as of 2026-09
- Absentee owners940
- Mailable address97%910
- Connected mobile8%under 100
- Email on file9%under 100
- Mobile and DNC clear4%under 100
Rounded floors, not promises.
| Population | 44,400 |
|---|---|
| Housing units | 16,900 |
| Owner occupied | 66% of occupied homes |
| Renter occupied | 34% of occupied homes |
| Median household income | $97,000 |
| Median age | 42.0 |
| Built before 1970 | 66% of homes |
| Built 2000 or later | 4% of homes |
| Median mortgage payment | $2,740 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: 95% of 94546 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 34% with a connected mobile, but only 15% 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 43%. 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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