21771Mount Airy, MD
Prospecting data for 21771: Mount Airy, MD
Zip 21771 in Mount Airy, Maryland has about 9,340 homeowners. About 3,340 have a connected mobile phone and 1,210 of those are clear of the National Do Not Call Registry.
Absentee owners 21771
Data as of 2026-09
- Absentee owners630
- Mailable address98%620
- Connected mobile11%under 100
- Email on file16%100
- Mobile and DNC clear5%under 100
Rounded floors, not promises.
| Population | 29,900 |
|---|---|
| Housing units | 10,300 |
| Owner occupied | 92% of occupied homes |
| Renter occupied | 8% of occupied homes |
| Median household income | $130,000 |
| Median age | 42.1 |
| Built before 1970 | 16% of homes |
| Built 2000 or later | 21% of homes |
| Median mortgage payment | $2,380 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: 97% of 21771 homeowners have a deliverable mailing address. Mail is the only channel with no consent requirement, so it is the floor of any Mount Airy campaign.
Calling and texting reach about 36% 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 57%. 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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