sensors Mode-S transponder
0C21E8
ICAO 24-bit transponder address · allocated to Suriname
Currently assigned to HP-1994UCG · BOEING 737-400
- Hex
- 0C21E8
- Octal
- 03020750
- Decimal
- 795,112
- Country
- SR
- Tail
- HP-1994UCG
- Type
- B734
- Flights observed
- 44
- Distinct callsigns
- 20
- Country
- SR
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 0C21E8 falls within the block assigned to Suriname (SR) by ICAO Annex 10, Volume III. Every aircraft registered in Suriname 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 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| UCG301 | - | 6 | 2026-06-03 |
| UCG470 | Uniworld Air Cargo | 4 | 2026-05-22 |
| UCG300 | Uniworld Air Cargo | 4 | 2026-04-28 |
| UCG953 | Uniworld Air Cargo | 3 | 2026-05-21 |
| UCG972 | - | 2 | 2026-05-14 |
| UCG970 | Uniworld Air Cargo | 2 | 2026-05-21 |
| UCG954 | - | 2 | 2026-05-14 |
| UCG795 | - | 2 | 2026-05-29 |
| UCG471 | - | 2 | 2026-05-15 |
| UCG211 | - | 2 | 2026-04-23 |
| UCG210 | Uniworld Air Cargo | 2 | 2026-05-23 |
| UCG984 | - | 1 | 2026-05-22 |
| UCG807 | - | 1 | 2026-05-09 |
| UCG774 | - | 1 | 2026-06-01 |
| UCG597 | Uniworld Air Cargo | 1 | 2026-05-05 |
| UCG595 | Uniworld Air Cargo | 1 | 2026-05-07 |
| UCG582 | - | 1 | 2026-05-08 |
| UCG576 | - | 1 | 2026-05-04 |
| UCG518 | Uniworld Air Cargo | 1 | 2026-04-29 |
| UCG334 | - | 1 | 2026-04-14 |
Recent flights last 44
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-03 | UCG301 | - | Jun 3, 01:25 UTC | Jun 3, 02:00 UTC | 35m |
| 2026-06-01 | UCG774 | - | Jun 1, 13:40 UTC | Jun 1, 14:15 UTC | 35m |
| 2026-05-30 | UCG301 | - | May 30, 14:30 UTC | May 30, 15:10 UTC | 40m |
| 2026-05-29 | UCG795 | - | May 29, 16:50 UTC | May 29, 23:00 UTC | 6h 10m |
| 2026-05-23 | UCG245 | CCS → BOG | May 23, 10:40 UTC | May 23, 10:55 UTC | 15m |
| 2026-05-23 | UCG210 | PTY → BOG | May 23, 08:45 UTC | May 23, 08:55 UTC | 10m |
| 2026-05-22 | UCG470 | PTY → PTY | May 22, 02:05 UTC | May 22, 20:35 UTC | 18h 30m |
| 2026-05-22 | UCG470 | PTY → PTY | May 22, 01:45 UTC | May 22, 20:35 UTC | 18h 50m |
| 2026-05-22 | UCG984 | - | May 22, 00:05 UTC | May 22, 00:15 UTC | 10m |
| 2026-05-21 | UCG953 | CUR → AUA | May 21, 11:45 UTC | May 21, 12:10 UTC | 25m |
| 2026-05-21 | UCG970 | PTY → CUR | May 21, 10:35 UTC | May 21, 10:45 UTC | 10m |
| 2026-05-18 | UCG795 | - | May 18, 00:00 UTC | May 18, 00:10 UTC | 10m |
| 2026-05-16 | UCG210 | PTY → BOG | May 16, 14:55 UTC | May 16, 15:05 UTC | 10m |
| 2026-05-15 | UCG471 | - | May 15, 17:55 UTC | May 15, 22:05 UTC | 4h 10m |
| 2026-05-14 | UCG972 | - | May 14, 01:40 UTC | May 14, 01:55 UTC | 15m |
| 2026-05-14 | UCG954 | - | May 14, 00:20 UTC | May 14, 00:30 UTC | 10m |
| 2026-05-13 | UCG953 | CUR → AUA | May 13, 11:45 UTC | May 13, 12:05 UTC | 20m |
| 2026-05-13 | UCG970 | PTY → CUR | May 13, 10:35 UTC | May 13, 10:45 UTC | 10m |
| 2026-05-09 | UCG807 | - | May 9, 14:25 UTC | May 9, 14:50 UTC | 25m |
| 2026-05-08 | UCG582 | - | May 8, 15:35 UTC | May 8, 19:25 UTC | 3h 50m |
| 2026-05-07 | UCG595 | PTY → MTY | May 7, 23:19 UTC | May 8, 02:55 UTC | 3h 35m |
| 2026-05-05 | UCG597 | CUN → PTY | May 5, 04:55 UTC | May 5, 05:35 UTC | 40m |
| 2026-05-04 | UCG576 | - | May 4, 23:20 UTC | May 4, 23:30 UTC | 10m |
| 2026-05-04 | UCG470 | PTY → PTY | May 4, 18:55 UTC | May 4, 19:15 UTC | 20m |
| 2026-05-01 | UCG972 | - | May 1, 01:40 UTC | May 1, 02:00 UTC | 20m |
| 2026-05-01 | UCG954 | - | May 1, 00:15 UTC | May 1, 00:25 UTC | 10m |
| 2026-04-30 | UCG953 | CUR → AUA | Apr 30, 12:05 UTC | Apr 30, 12:30 UTC | 25m |
| 2026-04-29 | UCG518 | GUA → LIM | Apr 29, 16:20 UTC | Apr 30, 10:50 UTC | 18h 29m |
| 2026-04-29 | UCG301 | - | Apr 29, 07:40 UTC | Apr 29, 15:00 UTC | 7h 21m |
| 2026-04-28 | UCG300 | PTY → LIM | Apr 28, 18:20 UTC | Apr 28, 19:05 UTC | 45m |
| 2026-04-24 | UCG300 | PTY → LIM | Apr 24, 17:55 UTC | Apr 24, 21:30 UTC | 3h 35m |
| 2026-04-23 | UCG211 | - | Apr 23, 15:25 UTC | Apr 23, 15:40 UTC | 15m |
| 2026-04-23 | UCG247 | - | Apr 23, 12:15 UTC | Apr 23, 12:35 UTC | 20m |
| 2026-04-21 | UCG300 | PTY → LIM | Apr 21, 20:25 UTC | Apr 22, 10:10 UTC | 13h 45m |
| 2026-04-20 | UCG246 | BOG → CCS | Apr 20, 11:45 UTC | Apr 20, 11:55 UTC | 10m |
| 2026-04-20 | UCG249 | CCS → BOG | Apr 20, 00:15 UTC | Apr 20, 00:40 UTC | 25m |
| 2026-04-19 | UCG211 | - | Apr 19, 16:15 UTC | Apr 19, 16:25 UTC | 10m |
| 2026-04-18 | UCG301 | - | Apr 18, 09:25 UTC | Apr 18, 09:40 UTC | 15m |
| 2026-04-17 | UCG300 | - | Apr 17, 13:40 UTC | Apr 17, 14:20 UTC | 40m |
| 2026-04-16 | UCG471 | - | Apr 16, 17:54 UTC | Apr 16, 18:10 UTC | 15m |
| 2026-04-16 | UCG470 | - | Apr 16, 14:00 UTC | Apr 16, 14:20 UTC | 20m |
| 2026-04-15 | UCG301 | - | Apr 15, 09:00 UTC | Apr 15, 09:15 UTC | 15m |
| 2026-04-15 | UCG301 | - | Apr 15, 08:30 UTC | Apr 15, 08:55 UTC | 25m |
| 2026-04-14 | UCG334 | - | Apr 14, 15:50 UTC | Apr 14, 16:30 UTC | 40m |
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.
Prefer a tail-number view? See the HP-1994UCG page for operator, model, and routing details .