21207Gwynn Oak, MD
Prospecting data for 21207: Gwynn Oak, MD
Zip 21207 in Gwynn Oak, Maryland has about 11,000 homeowners. About 3,880 have a connected mobile phone and 2,120 of those are clear of the National Do Not Call Registry.
Absentee owners 21207
Data as of 2026-09
- Absentee owners1,260
- Mailable address100%1,250
- Connected mobile10%120
- Email on file10%130
- Mobile and DNC clear5%under 100
Rounded floors, not promises.
| Population | 48,900 |
|---|---|
| Housing units | 21,000 |
| Owner occupied | 62% of occupied homes |
| Renter occupied | 38% of occupied homes |
| Median household income | $57,000 |
| Median age | 40.4 |
| Built before 1970 | 73% of homes |
| Built 2000 or later | 4% of homes |
| Median mortgage payment | $1,480 a month |
| Time zone | EST |
| Area code | 410 |
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: 99% of 21207 homeowners have a deliverable mailing address. Mail is the only channel with no consent requirement, so it is the floor of any Gwynn Oak campaign.
Calling and texting reach about 35% with a connected mobile, but only 19% 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 49%. 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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