sensors Mode-S transponder
0B421A
ICAO 24-bit transponder address · allocated to Nicaragua
- Hex
- 0B421A
- Octal
- 02641032
- Decimal
- 737,818
- Country
- NI
- Flights observed
- 33
- Distinct callsigns
- 1
- Country
- NI
- Last broadcast
- 5d ago
Last known position
Country allocation
The ICAO 24-bit address 0B421A falls within the block assigned to Nicaragua (NI) by ICAO Annex 10, Volume III. Every aircraft registered in Nicaragua receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.
Callsign history 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| TGOYM | - | 33 | 2026-07-22 |
Recent flights last 33
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-22 | TGOYM | - | Jul 22, 22:50 UTC | Jul 22, 23:05 UTC | 15m |
| 2026-07-22 | TGOYM | - | Jul 22, 12:40 UTC | Jul 22, 13:00 UTC | 20m |
| 2026-07-16 | TGOYM | - | Jul 16, 22:05 UTC | Jul 16, 22:19 UTC | 15m |
| 2026-07-16 | TGOYM | - | Jul 16, 12:30 UTC | Jul 16, 12:44 UTC | 15m |
| 2026-07-16 | TGOYM | - | Jul 16, 00:40 UTC | Jul 16, 01:25 UTC | 45m |
| 2026-07-15 | TGOYM | - | Jul 15, 12:50 UTC | Jul 15, 13:35 UTC | 45m |
| 2026-07-15 | TGOYM | GUA → GUA | Jul 15, 12:35 UTC | Jul 15, 12:40 UTC | 5m |
| 2026-07-13 | TGOYM | - | Jul 13, 14:45 UTC | Jul 13, 15:05 UTC | 20m |
| 2026-07-13 | TGOYM | - | Jul 13, 13:20 UTC | Jul 13, 13:35 UTC | 15m |
| 2026-07-11 | TGOYM | - | Jul 11, 16:50 UTC | Jul 11, 17:40 UTC | 50m |
| 2026-07-10 | TGOYM | - | Jul 10, 23:20 UTC | Jul 10, 23:45 UTC | 25m |
| 2026-07-10 | TGOYM | - | Jul 10, 22:05 UTC | Jul 10, 22:40 UTC | 35m |
| 2026-07-08 | TGOYM | - | Jul 8, 23:45 UTC | Jul 9, 00:10 UTC | 25m |
| 2026-07-08 | TGOYM | - | Jul 8, 12:40 UTC | Jul 8, 13:05 UTC | 25m |
| 2026-06-24 | TGOYM | - | Jun 24, 16:19 UTC | Jun 24, 16:34 UTC | 15m |
| 2026-06-24 | TGOYM | - | Jun 24, 12:44 UTC | Jun 24, 13:14 UTC | 30m |
| 2026-06-22 | TGOYM | - | Jun 22, 20:30 UTC | Jun 22, 21:35 UTC | 1h 5m |
| 2026-06-21 | TGOYM | - | Jun 21, 15:40 UTC | Jun 21, 16:04 UTC | 25m |
| 2026-06-18 | TGOYM | - | Jun 18, 00:25 UTC | Jun 18, 00:40 UTC | 15m |
| 2026-06-17 | TGOYM | - | Jun 17, 12:40 UTC | Jun 17, 13:00 UTC | 20m |
| 2026-06-13 | TGOYM | - | Jun 13, 16:15 UTC | Jun 13, 16:25 UTC | 10m |
| 2026-06-13 | TGOYM | - | Jun 13, 15:15 UTC | Jun 13, 15:25 UTC | 10m |
| 2026-06-08 | TGOYM | - | Jun 8, 23:10 UTC | Jun 8, 23:30 UTC | 20m |
| 2026-06-08 | TGOYM | - | Jun 8, 18:35 UTC | Jun 8, 18:50 UTC | 15m |
| 2026-05-19 | TGOYM | GUA → GUA | May 19, 15:45 UTC | May 19, 16:05 UTC | 20m |
| 2026-05-07 | TGOYM | - | May 7, 00:35 UTC | May 7, 01:20 UTC | 45m |
| 2026-05-06 | TGOYM | - | May 6, 12:45 UTC | May 6, 13:35 UTC | 50m |
| 2026-04-30 | TGOYM | - | Apr 30, 00:55 UTC | Apr 30, 01:30 UTC | 35m |
| 2026-04-29 | TGOYM | - | Apr 29, 12:45 UTC | Apr 29, 13:35 UTC | 50m |
| 2026-04-22 | TGOYM | - | Apr 22, 21:50 UTC | Apr 22, 22:05 UTC | 15m |
| 2026-04-22 | TGOYM | - | Apr 22, 12:45 UTC | Apr 22, 13:00 UTC | 15m |
| 2026-04-16 | TGOYM | - | Apr 16, 00:20 UTC | Apr 16, 00:45 UTC | 25m |
| 2026-04-15 | TGOYM | - | Apr 15, 12:35 UTC | Apr 15, 12:55 UTC | 20m |
About Mode-S
A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.
Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.