sensors Mode-S transponder
0C21FD
ICAO 24-bit transponder address · allocated to Suriname
- Hex
- 0C21FD
- Octal
- 03020775
- Decimal
- 795,133
- Country
- SR
- Flights observed
- 26
- Distinct callsigns
- 12
- Country
- SR
- Last broadcast
- 6h ago
Last known position
Country allocation
The ICAO 24-bit address 0C21FD 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 12 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| BOE123 | - | 6 | 2026-05-13 |
| CMP734 | - | 3 | 2026-06-23 |
| CMP422 | - | 3 | 2026-06-24 |
| CMP295 | - | 3 | 2026-06-21 |
| BOE921 | - | 3 | 2026-05-22 |
| CMP9821 | Copa Airlines | 1 | 2026-06-01 |
| CMP821 | - | 1 | 2026-06-18 |
| CMP765 | - | 1 | 2026-06-22 |
| CMP752 | - | 1 | 2026-06-17 |
| CMP484 | Copa Airlines | 1 | 2026-06-16 |
| CMP201 | - | 1 | 2026-06-21 |
| CMP141 | - | 1 | 2026-06-21 |
Recent flights last 26
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-24 | CMP422 | - | Jun 24, 00:09 UTC | Jun 24, 04:24 UTC | 4h 15m |
| 2026-06-23 | CMP422 | - | Jun 23, 06:09 UTC | Jun 24, 04:24 UTC | 22h 15m |
| 2026-06-23 | CMP734 | - | Jun 23, 01:20 UTC | Jun 24, 00:09 UTC | 22h 50m |
| 2026-06-22 | CMP734 | - | Jun 22, 17:29 UTC | Jun 23, 06:59 UTC | 13h 30m |
| 2026-06-22 | CMP734 | - | Jun 22, 09:00 UTC | Jun 23, 06:59 UTC | 22h 0m |
| 2026-06-22 | CMP765 | - | Jun 22, 05:04 UTC | Jun 23, 01:35 UTC | 20h 30m |
| 2026-06-21 | CMP141 | - | Jun 21, 23:24 UTC | Jun 22, 17:34 UTC | 18h 10m |
| 2026-06-21 | CMP295 | - | Jun 21, 21:19 UTC | Jun 22, 17:34 UTC | 20h 15m |
| 2026-06-21 | CMP295 | - | Jun 21, 19:20 UTC | Jun 22, 17:34 UTC | 22h 15m |
| 2026-06-21 | CMP295 | - | Jun 21, 19:14 UTC | Jun 22, 09:04 UTC | 13h 50m |
| 2026-06-21 | CMP201 | - | Jun 21, 13:09 UTC | Jun 21, 17:29 UTC | 4h 20m |
| 2026-06-18 | CMP821 | - | Jun 18, 17:21 UTC | Jun 19, 09:59 UTC | 16h 38m |
| 2026-06-17 | CMP752 | - | Jun 17, 21:55 UTC | Jun 18, 15:20 UTC | 17h 25m |
| 2026-06-16 | CMP484 | YUL → PTY | Jun 16, 13:04 UTC | Jun 16, 16:39 UTC | 3h 35m |
| 2026-06-16 | CMP422 | - | Jun 16, 01:15 UTC | Jun 16, 04:25 UTC | 3h 10m |
| 2026-06-01 | CMP9821 | BFI → PTY | Jun 1, 17:45 UTC | Jun 2, 00:25 UTC | 6h 40m |
| 2026-05-22 | BOE921 | - | May 22, 15:10 UTC | May 22, 15:55 UTC | 45m |
| 2026-05-20 | BOE921 | - | May 20, 19:00 UTC | May 20, 20:10 UTC | 1h 10m |
| 2026-05-15 | BOE921 | - | May 15, 16:25 UTC | May 15, 18:15 UTC | 1h 50m |
| 2026-05-13 | BOE123 | RNT → RNT | May 13, 02:10 UTC | May 13, 02:45 UTC | 35m |
| 2026-05-12 | - | RNT → RNT | May 12, 16:10 UTC | May 12, 16:30 UTC | 20m |
| 2026-05-10 | BOE123 | RNT → RNT | May 10, 03:30 UTC | May 10, 03:55 UTC | 25m |
| 2026-05-10 | BOE123 | RNT → RNT | May 10, 03:04 UTC | May 10, 03:25 UTC | 20m |
| 2026-05-10 | BOE123 | RNT → RNT | May 10, 02:45 UTC | May 10, 02:55 UTC | 10m |
| 2026-05-10 | BOE123 | RNT → RNT | May 10, 02:14 UTC | May 10, 02:24 UTC | 10m |
| 2026-05-10 | BOE123 | RNT → RNT | May 10, 00:45 UTC | May 10, 01:14 UTC | 30m |
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.