sensors Mode-S transponder
0C21FB
ICAO 24-bit transponder address · allocated to Suriname
- Hex
- 0C21FB
- Octal
- 03020773
- Decimal
- 795,131
- Country
- SR
- Flights observed
- 31
- Distinct callsigns
- 14
- Country
- SR
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 0C21FB 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 14 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| BOE123 | - | 5 | 2026-04-15 |
| CMP880 | Copa Airlines | 4 | 2026-05-29 |
| CMP357 | Copa Airlines | 4 | 2026-05-30 |
| BOE919 | - | 3 | 2026-04-22 |
| CMP9819 | Copa Airlines | 2 | 2026-05-06 |
| CMP891 | Copa Airlines | 2 | 2026-05-29 |
| CMP765 | Copa Airlines | 2 | 2026-05-30 |
| CMP752 | Copa Airlines | 2 | 2026-05-27 |
| CMP404 | Copa Airlines | 2 | 2026-05-25 |
| CMP709 | Copa Airlines | 1 | 2026-05-23 |
| CMP708 | Copa Airlines | 1 | 2026-05-23 |
| CMP451 | Copa Airlines | 1 | 2026-05-23 |
| CMP450 | Copa Airlines | 1 | 2026-05-23 |
| CMP432 | Copa Airlines | 1 | 2026-05-26 |
Recent flights last 31
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | CMP765 | PTY → CNF | May 30, 21:35 UTC | May 31, 16:20 UTC | 18h 45m |
| 2026-05-30 | CMP765 | PTY → CNF | May 30, 17:30 UTC | May 31, 16:20 UTC | 22h 50m |
| 2026-05-30 | CMP357 | IAD → PTY | May 30, 14:50 UTC | May 31, 14:00 UTC | 23h 10m |
| 2026-05-30 | CMP357 | IAD → PTY | May 30, 14:00 UTC | May 31, 09:35 UTC | 19h 35m |
| 2026-05-29 | CMP891 | ATL → PTY | May 29, 22:05 UTC | May 30, 07:55 UTC | 9h 50m |
| 2026-05-29 | CMP880 | PTY → ATL | May 29, 00:50 UTC | May 29, 19:35 UTC | 18h 45m |
| 2026-05-28 | CMP880 | PTY → ATL | May 28, 22:50 UTC | May 29, 19:35 UTC | 20h 45m |
| 2026-05-28 | CMP891 | ATL → PTY | May 28, 21:50 UTC | May 29, 19:35 UTC | 21h 45m |
| 2026-05-28 | CMP880 | PTY → ATL | May 28, 02:25 UTC | May 28, 19:20 UTC | 16h 55m |
| 2026-05-27 | CMP880 | PTY → ATL | May 27, 22:55 UTC | May 28, 19:20 UTC | 20h 25m |
| 2026-05-27 | CMP752 | PTY → SSA | May 27, 16:50 UTC | May 28, 16:45 UTC | 23h 55m |
| 2026-05-27 | CMP752 | PTY → SSA | May 27, 16:40 UTC | May 28, 06:35 UTC | 13h 55m |
| 2026-05-26 | CMP432 | PTY → MIA | May 26, 13:00 UTC | May 27, 05:35 UTC | 16h 35m |
| 2026-05-25 | CMP357 | IAD → PTY | May 25, 13:55 UTC | May 26, 02:44 UTC | 12h 49m |
| 2026-05-25 | CMP404 | PTY → IAD | May 25, 05:45 UTC | May 25, 08:05 UTC | 2h 20m |
| 2026-05-23 | CMP709 | BWI → PTY | May 23, 20:55 UTC | May 24, 00:20 UTC | 3h 25m |
| 2026-05-23 | CMP708 | PTY → BWI | May 23, 10:45 UTC | May 23, 19:05 UTC | 8h 20m |
| 2026-05-23 | CMP451 | SJU → PTY | May 23, 09:40 UTC | May 23, 09:50 UTC | 10m |
| 2026-05-23 | CMP450 | PTY → SJU | May 23, 02:00 UTC | May 23, 02:15 UTC | 15m |
| 2026-05-21 | CMP357 | IAD → PTY | May 21, 13:55 UTC | May 21, 17:20 UTC | 3h 25m |
| 2026-05-21 | CMP404 | PTY → IAD | May 21, 05:05 UTC | May 21, 08:35 UTC | 3h 30m |
| 2026-05-06 | CMP9819 | BFI → PAE | May 6, 18:35 UTC | May 6, 23:05 UTC | 4h 30m |
| 2026-04-30 | CMP9819 | BFI → PAE | Apr 30, 17:25 UTC | Apr 30, 17:35 UTC | 10m |
| 2026-04-22 | BOE919 | - | Apr 22, 17:50 UTC | Apr 22, 18:35 UTC | 45m |
| 2026-04-21 | BOE919 | - | Apr 21, 18:15 UTC | Apr 21, 19:00 UTC | 45m |
| 2026-04-19 | BOE919 | RNT → BFI | Apr 19, 20:20 UTC | Apr 19, 22:35 UTC | 2h 15m |
| 2026-04-15 | BOE123 | RNT → RNT | Apr 15, 04:25 UTC | Apr 15, 04:30 UTC | 5m |
| 2026-04-15 | BOE123 | RNT → RNT | Apr 15, 03:20 UTC | Apr 15, 03:30 UTC | 10m |
| 2026-04-15 | BOE123 | RNT → RNT | Apr 15, 02:55 UTC | Apr 15, 03:15 UTC | 20m |
| 2026-04-15 | BOE123 | RNT → RNT | Apr 15, 02:35 UTC | Apr 15, 02:50 UTC | 15m |
| 2026-04-15 | BOE123 | RNT → RNT | Apr 15, 01:10 UTC | Apr 15, 02:30 UTC | 1h 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.