sensors Mode-S transponder

0C21FB

ICAO 24-bit transponder address · allocated to Suriname

Hex
0C21FB
Octal
03020773
Decimal
795,131
Country
SR
No current signal · last broadcast 1h ago
Flights observed
137
Distinct callsigns
20
Country
SR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 0C21FB.

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 20 distinct

Callsign Airline Flights Last seen
CMP9819 Copa Airlines 8 2026-06-28
CMP821 - 8 2026-07-13
CMP820 - 5 2026-07-14
CMP734 - 5 2026-07-13
BOE123 - 5 2026-04-15
CMP9026 - 4 2026-06-29
CMP880 Copa Airlines 4 2026-05-29
CMP765 - 4 2026-07-12
CMP753 - 4 2026-07-10
CMP479 - 4 2026-07-07
CMP476 - 4 2026-07-08
CMP404 Copa Airlines 4 2026-06-09
CMP357 Copa Airlines 4 2026-05-30
CMP119 - 4 2026-06-22
CMP477 - 3 2026-07-09
CMP470 - 3 2026-06-18
CMP424 - 3 2026-07-10
CMP228 Copa Airlines 3 2026-06-06
CMP205 - 3 2026-07-11
BOE919 - 3 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CMP709 - Jul 17, 20:55 UTCJul 18, 00:19 UTC3h 25m
2026-07-17 CMP708 - Jul 17, 09:15 UTCJul 17, 18:44 UTC9h 30m
2026-07-17 CMP337 - Jul 17, 06:00 UTCJul 17, 06:40 UTC40m
2026-07-16 CMP143 - Jul 16, 22:05 UTCJul 16, 22:15 UTC10m
2026-07-15 CMP642 - Jul 15, 21:15 UTCJul 16, 14:55 UTC17h 40m
2026-07-15 CMP862 SJO → MCO Jul 15, 00:00 UTCJul 15, 17:50 UTC17h 50m
2026-07-14 CMP820 - Jul 14, 05:50 UTCJul 14, 22:55 UTC17h 4m
2026-07-14 CMP820 - Jul 14, 02:50 UTCJul 14, 22:55 UTC20h 4m
2026-07-14 CMP820 - Jul 14, 01:05 UTCJul 14, 22:55 UTC21h 49m
2026-07-13 CMP820 - Jul 13, 22:50 UTCJul 14, 22:45 UTC23h 54m
2026-07-13 CMP821 - Jul 13, 21:30 UTCJul 14, 18:15 UTC20h 45m
2026-07-13 CMP821 - Jul 13, 16:40 UTCJul 14, 11:00 UTC18h 20m
2026-07-13 CMP821 - Jul 13, 14:20 UTCJul 14, 11:00 UTC20h 40m
2026-07-13 CMP821 - Jul 13, 08:55 UTCJul 14, 06:55 UTC22h 0m
2026-07-13 CMP821 - Jul 13, 06:50 UTCJul 14, 06:45 UTC23h 55m
2026-07-13 CMP821 - Jul 13, 06:05 UTCJul 14, 03:05 UTC21h 0m
2026-07-13 CMP734 - Jul 13, 00:50 UTCJul 13, 23:30 UTC22h 40m
2026-07-12 CMP734 - Jul 12, 22:50 UTCJul 13, 22:05 UTC23h 15m
2026-07-12 CMP734 - Jul 12, 21:25 UTCJul 13, 16:45 UTC19h 20m
2026-07-12 CMP734 - Jul 12, 17:55 UTCJul 13, 16:45 UTC22h 50m
2026-07-12 CMP734 - Jul 12, 13:40 UTCJul 13, 10:30 UTC20h 50m
2026-07-12 CMP765 - Jul 12, 09:55 UTCJul 13, 08:45 UTC22h 50m
2026-07-12 CMP765 - Jul 12, 06:50 UTCJul 13, 06:45 UTC23h 55m
2026-07-12 CMP204 - Jul 12, 06:01 UTCJul 13, 01:05 UTC19h 5m
2026-07-12 CMP204 - Jul 12, 01:35 UTCJul 13, 00:45 UTC23h 10m
2026-07-11 CMP205 - Jul 11, 22:50 UTCJul 12, 22:00 UTC23h 10m
2026-07-11 CMP205 - Jul 11, 22:40 UTCJul 12, 18:15 UTC19h 35m
2026-07-11 CMP205 - Jul 11, 17:40 UTCJul 12, 14:01 UTC20h 20m
2026-07-10 CMP753 - Jul 10, 22:20 UTCJul 11, 15:55 UTC17h 35m
2026-07-10 CMP753 - Jul 10, 17:35 UTCJul 11, 15:55 UTC22h 20m
2026-07-10 CMP753 - Jul 10, 15:10 UTCJul 11, 11:10 UTC20h 0m
2026-07-10 CMP753 - Jul 10, 08:50 UTCJul 11, 07:00 UTC22h 10m
2026-07-10 CMP424 - Jul 10, 06:50 UTCJul 11, 06:45 UTC23h 56m
2026-07-10 CMP424 - Jul 10, 06:10 UTCJul 11, 02:55 UTC20h 45m
2026-07-10 CMP424 - Jul 10, 04:15 UTCJul 11, 02:45 UTC22h 30m
2026-07-09 CMP423 - Jul 9, 16:35 UTCJul 10, 02:50 UTC10h 15m
2026-07-09 CMP869 PTY → SDQ Jul 9, 14:20 UTCJul 9, 14:30 UTC10m
2026-07-09 CMP477 - Jul 9, 05:05 UTCJul 9, 09:35 UTC4h 30m
2026-07-08 CMP476 - Jul 8, 12:40 UTCJul 9, 00:05 UTC11h 25m
2026-07-07 CMP479 - Jul 7, 18:55 UTCJul 8, 02:15 UTC7h 20m
2026-07-07 CMP820 - Jul 7, 05:20 UTCJul 7, 16:20 UTC11h 0m
2026-07-06 CMP821 - Jul 6, 07:25 UTCJul 7, 02:15 UTC18h 50m
2026-07-06 CMP821 - Jul 6, 05:30 UTCJul 7, 02:15 UTC20h 45m
2026-07-04 CMP445 - Jul 4, 23:05 UTCJul 5, 01:05 UTC2h 0m
2026-07-04 CMP478 - Jul 4, 09:50 UTCJul 4, 20:30 UTC10h 40m
2026-07-03 CMP291 - Jul 3, 13:15 UTCJul 4, 08:30 UTC19h 15m
2026-07-02 CMP246 - Jul 2, 10:45 UTCJul 3, 02:35 UTC15h 50m
2026-07-01 CMP240 - Jul 1, 10:30 UTCJul 1, 23:40 UTC13h 10m
2026-06-30 CMP479 MCO → GUA Jun 30, 21:10 UTCJul 1, 03:40 UTC6h 30m
2026-06-29 CMP446 PTY → MCO Jun 29, 23:05 UTCJun 30, 16:25 UTC17h 21m

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.

Mode-S 0C21FB frequently asked

What is Mode-S code 0C21FB?
0C21FB is an ICAO 24-bit transponder address. Allocated to Suriname.
Where is Mode-S 0C21FB registered?
Mode-S code 0C21FB is allocated to Suriname (SR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C21FB broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C21FB, octal 03020773, decimal 795,131.
What flights does 0C21FB operate?
Mode-S 0C21FB has broadcast 20 distinct callsigns, including CMP9819, CMP821, CMP820, CMP734, BOE123.