sensors Mode-S transponder
0C21B9
ICAO 24-bit transponder address · allocated to Suriname
Currently assigned to HP-9811CMP · BOEING 737 MAX 8
- Hex
- 0C21B9
- Octal
- 03020671
- Decimal
- 795,065
- Country
- SR
- Tail
- HP-9811CMP
- Type
- B38M
- Flights observed
- 114
- Distinct callsigns
- 20
- Country
- SR
- Last broadcast
- 7h ago
Last known position
Country allocation
The ICAO 24-bit address 0C21B9 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 |
|---|---|---|---|
| CMP821 | Copa Airlines | 4 | 2026-05-13 |
| CMP732 | Copa Airlines | 4 | 2026-05-17 |
| CMP477 | Copa Airlines | 4 | 2026-05-17 |
| CMP263 | Copa Airlines | 4 | 2026-05-26 |
| CMP891 | Copa Airlines | 3 | 2026-05-22 |
| CMP820 | Copa Airlines | 3 | 2026-05-13 |
| CMP734 | Copa Airlines | 3 | 2026-05-18 |
| CMP708 | Copa Airlines | 3 | 2026-05-15 |
| CMP705 | Copa Airlines | 3 | 2026-04-21 |
| CMP421 | Copa Airlines | 3 | 2026-04-28 |
| CMP317 | Copa Airlines | 3 | 2026-04-22 |
| CMP312 | - | 3 | 2026-04-13 |
| CMP229 | Copa Airlines | 3 | 2026-05-24 |
| CMP228 | Copa Airlines | 3 | 2026-05-24 |
| CMP880 | Copa Airlines | 2 | 2026-04-26 |
| CMP866 | Copa Airlines | 2 | 2026-05-12 |
| CMP863 | - | 2 | 2026-05-13 |
| CMP753 | Copa Airlines | 2 | 2026-04-14 |
| CMP752 | Copa Airlines | 2 | 2026-05-06 |
| CMP479 | Copa Airlines | 2 | 2026-05-07 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CMP372 | HAV → PTY | May 29, 17:55 UTC | May 29, 18:20 UTC | 25m |
| 2026-05-29 | CMP371 | PTY → HAV | May 29, 13:55 UTC | May 29, 14:15 UTC | 20m |
| 2026-05-28 | CMP123 | CUN → PTY | May 28, 16:55 UTC | May 29, 08:40 UTC | 15h 45m |
| 2026-05-28 | CMP122 | PTY → CUN | May 28, 13:35 UTC | May 28, 15:20 UTC | 1h 45m |
| 2026-05-27 | CMP412 | BOG → PTY | May 27, 14:15 UTC | May 27, 14:25 UTC | 10m |
| 2026-05-27 | CMP876 | PTY → BOG | May 27, 03:50 UTC | May 27, 03:59 UTC | 10m |
| 2026-05-26 | CMP459 | MCO → PTY | May 26, 21:20 UTC | May 26, 23:35 UTC | 2h 15m |
| 2026-05-26 | CMP862 | PTY → MCO | May 26, 08:15 UTC | May 26, 17:50 UTC | 9h 35m |
| 2026-05-26 | CMP263 | PTY → LIM | May 26, 05:25 UTC | May 26, 06:04 UTC | 40m |
| 2026-05-25 | CMP263 | PTY → LIM | May 25, 08:20 UTC | May 26, 06:04 UTC | 21h 44m |
| 2026-05-25 | CMP264 | LIM → PTY | May 25, 08:10 UTC | May 26, 06:04 UTC | 21h 54m |
| 2026-05-24 | CMP229 | ORD → PTY | May 24, 20:45 UTC | May 25, 06:10 UTC | 9h 25m |
| 2026-05-24 | CMP228 | PTY → ORD | May 24, 08:50 UTC | May 24, 18:30 UTC | 9h 40m |
| 2026-05-24 | CMP836 | ROS → PTY | May 24, 04:55 UTC | May 24, 05:10 UTC | 15m |
| 2026-05-23 | CMP882 | PTY → ROS | May 23, 08:20 UTC | May 24, 03:20 UTC | 19h 0m |
| 2026-05-23 | CMP403 | IAD → PTY | May 23, 06:35 UTC | May 24, 03:20 UTC | 20h 45m |
| 2026-05-22 | CMP448 | PTY → SDQ | May 22, 20:10 UTC | May 23, 04:30 UTC | 8h 19m |
| 2026-05-22 | CMP462 | LIM → PTY | May 22, 12:30 UTC | May 22, 13:15 UTC | 45m |
| 2026-05-22 | CMP891 | ATL → PTY | May 22, 01:15 UTC | May 22, 09:40 UTC | 8h 25m |
| 2026-05-21 | CMP253 | LAS → PTY | May 21, 07:50 UTC | May 21, 19:25 UTC | 11h 35m |
| 2026-05-20 | CMP456 | PTY → LAS | May 20, 23:35 UTC | May 21, 05:15 UTC | 5h 40m |
| 2026-05-18 | CMP734 | CNF → PTY | May 18, 16:20 UTC | May 19, 08:50 UTC | 16h 29m |
| 2026-05-18 | CMP734 | CNF → PTY | May 18, 13:55 UTC | May 19, 08:50 UTC | 18h 54m |
| 2026-05-18 | CMP734 | CNF → PTY | May 18, 07:30 UTC | May 19, 05:50 UTC | 22h 19m |
| 2026-05-18 | CMP733 | SLA → PTY | May 18, 00:20 UTC | May 19, 00:10 UTC | 23h 49m |
| 2026-05-17 | CMP732 | PTY → SLA | May 17, 23:45 UTC | May 18, 21:00 UTC | 21h 14m |
| 2026-05-17 | CMP732 | PTY → SLA | May 17, 16:50 UTC | May 18, 14:00 UTC | 21h 10m |
| 2026-05-17 | CMP732 | PTY → SLA | May 17, 14:25 UTC | May 18, 14:00 UTC | 23h 35m |
| 2026-05-17 | CMP732 | PTY → SLA | May 17, 08:20 UTC | May 18, 08:05 UTC | 23h 45m |
| 2026-05-17 | CMP477 | DEN → PTY | May 17, 06:20 UTC | May 18, 00:35 UTC | 18h 15m |
| 2026-05-17 | CMP477 | DEN → PTY | May 17, 05:00 UTC | May 18, 00:35 UTC | 19h 35m |
| 2026-05-16 | CMP476 | PTY → DEN | May 16, 18:45 UTC | May 17, 00:25 UTC | 5h 40m |
| 2026-05-16 | CMP861 | BOG → PTY | May 16, 15:16 UTC | May 16, 15:25 UTC | 10m |
| 2026-05-16 | CMP860 | PTY → BOG | May 16, 04:50 UTC | May 16, 05:05 UTC | 15m |
| 2026-05-15 | CMP709 | BWI → PTY | May 15, 21:00 UTC | May 15, 23:15 UTC | 2h 15m |
| 2026-05-15 | CMP708 | PTY → BWI | May 15, 16:50 UTC | May 15, 19:05 UTC | 2h 15m |
| 2026-05-14 | CMP708 | PTY → BWI | May 14, 23:05 UTC | May 15, 19:05 UTC | 19h 59m |
| 2026-05-14 | CMP708 | PTY → BWI | May 14, 21:10 UTC | May 15, 19:05 UTC | 21h 54m |
| 2026-05-13 | CMP820 | POA → PTY | May 13, 22:30 UTC | May 14, 17:40 UTC | 19h 10m |
| 2026-05-13 | CMP820 | POA → PTY | May 13, 16:45 UTC | May 14, 15:40 UTC | 22h 55m |
| 2026-05-13 | CMP820 | POA → PTY | May 13, 14:20 UTC | May 14, 09:35 UTC | 19h 15m |
| 2026-05-13 | CMP821 | PTY → POA | May 13, 08:35 UTC | May 14, 06:20 UTC | 21h 45m |
| 2026-05-13 | CMP863 | - | May 13, 06:35 UTC | May 14, 06:15 UTC | 23h 40m |
| 2026-05-12 | CMP866 | PTY → MEX | May 12, 15:05 UTC | May 13, 03:50 UTC | 12h 45m |
| 2026-05-11 | CMP884 | SAL → PTY | May 11, 14:10 UTC | May 11, 14:25 UTC | 15m |
| 2026-05-10 | CMP195 | MEX → PTY | May 10, 14:20 UTC | May 11, 14:15 UTC | 23h 55m |
| 2026-05-10 | CMP195 | MEX → PTY | May 10, 12:10 UTC | May 10, 14:30 UTC | 2h 20m |
| 2026-05-09 | CMP194 | PTY → MEX | May 9, 14:30 UTC | May 10, 06:15 UTC | 15h 45m |
| 2026-05-09 | CMP194 | PTY → MEX | May 9, 08:20 UTC | May 10, 06:15 UTC | 21h 55m |
| 2026-05-09 | CMP149 | MEX → PTY | May 9, 07:40 UTC | May 10, 06:15 UTC | 22h 35m |
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-9811CMP page for operator, model, and routing details .