94403San Mateo, CA
Prospecting data for 94403: San Mateo, CA
Zip 94403 in San Mateo, California has about 4,580 homeowners. About 1,360 have a connected mobile phone and 570 of those are clear of the National Do Not Call Registry.
Absentee owners 94403
Data as of 2026-09
- Absentee owners780
- Mailable address95%740
- Connected mobile8%under 100
- Email on file13%under 100
- Mobile and DNC clear3%under 100
Rounded floors, not promises.
| Population | 44,400 |
|---|---|
| Housing units | 17,300 |
| Owner occupied | 55% of occupied homes |
| Renter occupied | 45% of occupied homes |
| Median household income | $135,000 |
| Median age | 38.6 |
| Built before 1970 | 60% of homes |
| Built 2000 or later | 12% of homes |
| Median mortgage payment | $3,750 a month |
| Time zone | PST |
| Area code | 650 |
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 94403 homeowners have a deliverable mailing address. Mail is the only channel with no consent requirement, so it is the floor of any San Mateo campaign.
Calling and texting reach about 30% with a connected mobile, but only 13% 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 41%. 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.
→Nearby
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