Amateur Radio Callsigns in ZIP Code: 78553
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| KC5NLP | CONTRERAS, MICHAEL A | Harlingen | TX | United States |
| KD5HKW | Gaedke, Flavio R | Harlingen | TX | United States |
| KD5HKX | Gaedke, Israel S | Harlingen | TX | United States |
| KD5IAK | Gaedke, Angela S | Harligen | TX | United States |
| KD5JGQ | Gaedke, Guadalupe | Harlingen | TX | United States |
| W5STX | Valley Repeater Club | Harlingen | TX | United States |
| KS5KS | Sumney, Kimball S | Harlingen | TX | United States |
| K5OJC | CORTEZ, OSCAR J | Harlingen | TX | United States |