Humboldt County License Statistics
Data as of July 1, 2025
Year-over-Year New Licenses
This chart shows the number of unique new amateur radio licenses granted in Humboldt County each year, based on the initial grant date for each callsign. It reflects the rate of new operators joining the hobby.
Cumulative Growth Curve
This chart tracks the total number of active licenses over time, showing the overall growth of the ham radio community in the county. The count increases with new grants and decreases as licenses expire.
Daily Grants (Last 12 Months)
This heatmap visualizes the daily frequency of license grants (including renewals) over the past year. Darker squares indicate more grants on that day, highlighting periods of high activity like post-exam sessions.
Seasonality by Month
This chart aggregates all license grants by month to show seasonal trends. It helps answer whether more licenses are issued in certain times of the year.
Callsign Prefix Popularity
This chart displays the most common three-letter prefixes among currently active hams in the county. It shows the distribution of callsign assignments (e.g., KJ6, KN6) in our area.
Expiration Risk Buckets
This chart groups all unique licenses by their expiration date to show how many are due for renewal soon. It serves as a health-check for the local license pool.
Top 20 Surnames
This chart shows the most common last names among currently active license holders in Humboldt County. It's a fun demographic snapshot of the local ham community.
License Age Histogram
This histogram shows the distribution of license ages—how long ago the currently active hams first received their license. It reveals the experience level mix in the community, from newcomers to seasoned veterans.
License Class Composition (Coming Soon)
We'll add this once the data-pipeline captures class codes.