Apparatus

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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
No current signal · last broadcast 1d ago
Flights observed
73
Distinct callsigns
20
Country
SR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 0C21E8.

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 - 7 2026-07-07
UCG795 - 5 2026-07-15
UCG210 - 5 2026-07-15
UCG953 Uniworld Air Cargo 4 2026-06-04
UCG471 - 4 2026-06-03
UCG470 Uniworld Air Cargo 4 2026-05-22
UCG300 Uniworld Air Cargo 4 2026-04-28
UCG972 - 3 2026-06-05
UCG954 - 3 2026-06-05
UCG247 - 3 2026-06-09
UCG192 - 3 2026-07-16
UCG970 Uniworld Air Cargo 2 2026-05-21
UCG774 - 2 2026-07-03
UCG601 - 2 2026-07-10
UCG600 - 2 2026-07-09
UCG332 - 2 2026-07-01
UCG246 Uniworld Air Cargo 2 2026-06-08
UCG211 - 2 2026-04-23
UCG984 - 1 2026-05-22
UCG807 - 1 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 UCG787 - Jul 17, 04:25 UTCJul 17, 07:05 UTC2h 40m
2026-07-16 UCG192 - Jul 16, 04:20 UTCJul 16, 04:40 UTC20m
2026-07-15 UCG794 - Jul 15, 15:55 UTCJul 15, 16:15 UTC20m
2026-07-15 UCG795 - Jul 15, 12:30 UTCJul 15, 12:50 UTC20m
2026-07-15 UCG210 - Jul 15, 08:10 UTCJul 15, 08:25 UTC15m
2026-07-10 UCG601 - Jul 10, 13:40 UTCJul 10, 14:30 UTC50m
2026-07-09 UCG601 - Jul 9, 18:05 UTCJul 10, 14:30 UTC20h 25m
2026-07-09 UCG600 - Jul 9, 17:45 UTCJul 10, 14:30 UTC20h 45m
2026-07-09 UCG600 - Jul 9, 13:40 UTCJul 9, 18:35 UTC4h 55m
2026-07-09 UCG210 - Jul 9, 11:00 UTCJul 9, 11:30 UTC30m
2026-07-07 UCG301 - Jul 7, 23:50 UTCJul 8, 10:20 UTC10h 30m
2026-07-03 UCG774 - Jul 3, 15:35 UTCJul 3, 15:45 UTC10m
2026-07-01 UCG332 - Jul 1, 22:00 UTCJul 1, 22:35 UTC35m
2026-06-27 UCG192 - Jun 27, 14:05 UTCJun 27, 14:25 UTC20m
2026-06-26 UCG193 - Jun 26, 20:40 UTCJun 26, 20:59 UTC20m
2026-06-24 UCG292 - Jun 24, 14:55 UTCJun 24, 15:09 UTC15m
2026-06-16 UCG332 - Jun 16, 08:05 UTCJun 16, 12:55 UTC4h 50m
2026-06-15 UCG795 - Jun 15, 08:04 UTCJun 15, 13:40 UTC5h 35m
2026-06-09 UCG247 - Jun 9, 13:55 UTCJun 9, 14:15 UTC20m
2026-06-08 UCG246 BOG → CCS Jun 8, 04:10 UTCJun 8, 04:20 UTC10m
2026-06-08 UCG247 - Jun 8, 02:25 UTCJun 8, 02:40 UTC15m
2026-06-06 UCG192 - Jun 6, 13:44 UTCJun 6, 14:09 UTC25m
2026-06-06 UCG795 - Jun 6, 11:09 UTCJun 6, 11:19 UTC10m
2026-06-06 UCG210 PTY → BOG Jun 6, 08:30 UTCJun 6, 08:45 UTC15m
2026-06-05 UCG972 - Jun 5, 01:50 UTCJun 5, 02:10 UTC20m
2026-06-05 UCG954 - Jun 5, 00:15 UTCJun 5, 00:30 UTC15m
2026-06-04 UCG953 CUR → AUA Jun 4, 12:20 UTCJun 4, 12:40 UTC20m
2026-06-03 UCG471 - Jun 3, 20:40 UTCJun 4, 11:15 UTC14h 35m
2026-06-03 UCG471 - Jun 3, 02:05 UTCJun 4, 01:30 UTC23h 25m
2026-06-03 UCG301 - Jun 3, 01:25 UTCJun 3, 20:55 UTC19h 30m
2026-06-01 UCG774 - Jun 1, 13:40 UTCJun 1, 14:15 UTC35m
2026-05-30 UCG301 - May 30, 14:30 UTCMay 30, 15:10 UTC40m
2026-05-29 UCG795 - May 29, 16:50 UTCMay 29, 23:00 UTC6h 10m
2026-05-23 UCG245 CCS → BOG May 23, 10:40 UTCMay 23, 10:55 UTC15m
2026-05-23 UCG210 PTY → BOG May 23, 08:45 UTCMay 23, 08:55 UTC10m
2026-05-22 UCG470 PTY → PTY May 22, 02:05 UTCMay 22, 20:35 UTC18h 30m
2026-05-22 UCG470 PTY → PTY May 22, 01:45 UTCMay 22, 20:35 UTC18h 50m
2026-05-22 UCG984 - May 22, 00:05 UTCMay 22, 00:15 UTC10m
2026-05-21 UCG953 CUR → AUA May 21, 11:45 UTCMay 21, 12:10 UTC25m
2026-05-21 UCG970 PTY → CUR May 21, 10:35 UTCMay 21, 10:45 UTC10m
2026-05-18 UCG795 - May 18, 00:00 UTCMay 18, 00:10 UTC10m
2026-05-16 UCG210 PTY → BOG May 16, 14:55 UTCMay 16, 15:05 UTC10m
2026-05-15 UCG471 - May 15, 17:55 UTCMay 15, 22:05 UTC4h 10m
2026-05-14 UCG972 - May 14, 01:40 UTCMay 14, 01:55 UTC15m
2026-05-14 UCG954 - May 14, 00:20 UTCMay 14, 00:30 UTC10m
2026-05-13 UCG953 CUR → AUA May 13, 11:45 UTCMay 13, 12:05 UTC20m
2026-05-13 UCG970 PTY → CUR May 13, 10:35 UTCMay 13, 10:45 UTC10m
2026-05-09 UCG807 - May 9, 14:25 UTCMay 9, 14:50 UTC25m
2026-05-08 UCG582 - May 8, 15:35 UTCMay 8, 19:25 UTC3h 50m
2026-05-07 UCG595 PTY → MTY May 7, 23:19 UTCMay 8, 02:55 UTC3h 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-1994UCG page for operator, model, and routing details .

Mode-S 0C21E8 frequently asked

What is Mode-S code 0C21E8?
0C21E8 is an ICAO 24-bit transponder address. Allocated to Suriname. Assigned to HP-1994UCG.
Where is Mode-S 0C21E8 registered?
Mode-S code 0C21E8 is allocated to Suriname (SR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0C21E8 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0C21E8, octal 03020750, decimal 795,112.
What flights does 0C21E8 operate?
Mode-S 0C21E8 has broadcast 20 distinct callsigns, including UCG301, UCG795, UCG210, UCG953, UCG471.