21043Ellicott City, MD
Prospecting data for 21043: Ellicott City, MD
Zip 21043 in Ellicott City, Maryland has about 11,500 homeowners. About 4,180 have a connected mobile phone and 1,560 of those are clear of the National Do Not Call Registry.
Absentee owners 21043
Data as of 2026-09
- Absentee owners1,530
- Mailable address97%1,490
- Connected mobile7%110
- Email on file8%130
- Mobile and DNC clear2%under 100
Rounded floors, not promises.
| Population | 47,400 |
|---|---|
| Housing units | 17,900 |
| Owner occupied | 70% of occupied homes |
| Renter occupied | 30% of occupied homes |
| Median household income | $123,000 |
| Median age | 37.6 |
| Built before 1970 | 19% of homes |
| Built 2000 or later | 28% of homes |
| Median mortgage payment | $2,730 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: 96% of 21043 homeowners have a deliverable mailing address. Mail is the only channel with no consent requirement, so it is the floor of any Ellicott City campaign.
Calling and texting reach about 36% with a connected mobile, but only 14% 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 48%. 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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