21227Halethorpe, MD
Prospecting data for 21227: Halethorpe, MD
Zip 21227 in Halethorpe, Maryland has about 7,910 homeowners. About 2,130 have a connected mobile phone and 980 of those are clear of the National Do Not Call Registry.
Absentee owners 21227
Data as of 2026-09
- Absentee owners1,900
- Mailable address99%1,890
- Connected mobile6%120
- Email on file7%140
- Mobile and DNC clear3%under 100
Rounded floors, not promises.
| Population | 33,600 |
|---|---|
| Housing units | 13,100 |
| Owner occupied | 64% of occupied homes |
| Renter occupied | 36% of occupied homes |
| Median household income | $68,000 |
| Median age | 35.4 |
| Built before 1970 | 74% of homes |
| Built 2000 or later | 3% of homes |
| Median mortgage payment | $1,560 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: 98% of 21227 homeowners have a deliverable mailing address. Mail is the only channel with no consent requirement, so it is the floor of any Halethorpe campaign.
Calling and texting reach about 27% with a connected mobile, but only 12% 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 42%. 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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