Our Gender Append service adds male/female/unisex identifiers to your contact list based on first name data. Cleanlist uses an extensive 160,000+ name dictionary containing names of many nationalities and origins as well as nicknames.
Gender Append is an essential list maintenance tool for many data management projects. It allows marketers to create gender-based personalized communications with their customers and prospects. Such personalization typically results in increased response rates.
Gender is often an important demographic and will allow you to filter and analyze your data identifying new opportunities for your marketing campaigns.




85 - 95% Range.
Turn names and addresses into actionable customer intelligence with our Demographic Append bundle and, for even more personalized marketing campaigns, consider our Ethnicity Append service.
*Please note that following our file format specifications is required only for our Self-Service products.
Please see our File Format Specification page for more information on required input and standard result fields.
The Gender Append service also appends the following fields:
G = Genderized
- = Not Genderized
Match Type
C1 = Highest Confidence Match
C2 = High Confidence Match
C3 = Moderate Confidence Match
X2 = Missing/Invalid First Name
X5 = Other Not Matched
Gender Code
M = Male
F = Female
N = Neutral