20877Gaithersburg, MD

Prospecting data for 20877: Gaithersburg, MD

Name: Prospecting data for 20877: Gaithersburg, MD
Creator: Prospecting Data
License: https://prospectingdata.com/about/

Zip 20877 in Gaithersburg, Maryland has about 4,840 homeowners. About 1,310 have a connected mobile phone and 710 of those are clear of the National Do Not Call Registry.

Data as of 2026-09Montgomery County

Absentee owners 20877

Data as of 2026-09

Absentee ownersunder 100
Mailable address100%under 100
Connected mobile0%under 100
Email on file0%under 100
Mobile and DNC clear0%under 100

Rounded floors, not promises.

Who lives here
Population	38,400
Housing units	13,600
Owner occupied	45% of occupied homes
Renter occupied	55% of occupied homes
Median household income	$74,000
Median age	36.8
Built before 1970	20% of homes
Built 2000 or later	20% of homes
Median mortgage payment	$2,160 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 20877 homeowners have a deliverable mailing address. Mail is the only channel with no consent requirement, so it is the floor of any Gaithersburg campaign.

Calling and texting reach about 27% with a connected mobile, but only 15% 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 39%. 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.

→Free counts

Counts for your zip codes

Tell us the zip codes or counties you want and we reply with the same ledger for your area and a free sample.

Get counts