N9TPB
FCC License Search
🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 4, 2026) · next update tomorrow 6:00 am CDT
Ask:
HAMs within 5 miles of N9TPB · Extra class operators in Madison, WI · or try N9TPB · K9* wildcards · Smith, John · 0004797601 (FRN) · 53703 · Madison, WIMason Cho
FRN 0036909604 · first licensed Apr 25, 2025 as KD3BDU · 2 licenses on record
📝 FCC applications (2)
| Received | File number | Service | Purpose | Status | Call |
|---|---|---|---|---|---|
| May 1, 2025 | 0011550440 | HAM | Modification | Granted | KD3BDU |
| Apr 21, 2025 | 0011536822 | HAM | New license | Granted | KD3BDU |
Complete licensing history
-
- Licensee
- Mason Cho
- Address
- PO Box 83001
Gaithersburg, MD 20883-3001
- FRN
- 0036909604
- Previous call
- KD3BDU
- Last granted
- May 20, 2025
- Effective
- May 20, 2025
- Last action
- May 20, 2025
FCC actions (2)
- May 20, 2025 — Vanity call sign granted VANGRT
- May 20, 2025 — License issued LIISS
-
- Licensee
- Mason Cho
- Address
- PO Box 83001
Gaithersburg, MD 20883-3001
- FRN
- 0036909604
- Last granted
- Apr 25, 2025
- Effective
- Apr 25, 2025
- Last action
- May 20, 2025
FCC actions (3)
- May 20, 2025 — License canceled LICAN
- Apr 25, 2025 — License issued LIISS
- Apr 25, 2025 — Systematic call sign granted SYSGRT
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
- Seen May 29, 2025 → Oct 4, 2026 · 8 snapshots · as KD3BDU
Mason Cho
PO Box 83001
Gaithersburg, MD 20883-3001