20851Rockville, MD
Prospecting data for 20851: Rockville, MD
Zip 20851 in Rockville, Maryland has about 2,970 homeowners. About 830 have a connected mobile phone and 400 of those are clear of the National Do Not Call Registry.
Absentee owners 20851
Data as of 2026-09
- Absentee owners340
- Mailable address96%330
- Connected mobile8%under 100
- Email on file12%under 100
- Mobile and DNC clear3%under 100
Rounded floors, not promises.
| Population | 15,500 |
|---|---|
| Housing units | 5,150 |
| Owner occupied | 58% of occupied homes |
| Renter occupied | 42% of occupied homes |
| Median household income | $91,000 |
| Median age | 34.8 |
| Built before 1970 | 71% of homes |
| Built 2000 or later | 9% of homes |
| Median mortgage payment | $2,110 a month |
| Time zone | EST |
| Area code | 301 |
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: 96% of 20851 homeowners have a deliverable mailing address. Mail is the only channel with no consent requirement, so it is the floor of any Rockville campaign.
Calling and texting reach about 28% 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 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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