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sensors Mode-S transponder

0B4156

ICAO 24-bit transponder address · allocated to Nicaragua

Currently assigned to TG-ACG · CESSNA 172 Skyhawk

Hex
0B4156
Octal
02640526
Decimal
737,622
Country
NI
Tail
TG-ACG
Type
C172
No current signal · last broadcast Jul 25, 16:55 UTC
Flights observed
182
Distinct callsigns
1
Country
NI
Last broadcast
Jul 25, 16:55 UTC

Last known position

Most recent position reported by Mode-S 0B4156.

Country allocation

The ICAO 24-bit address 0B4156 falls within the block assigned to Nicaragua (NI) by ICAO Annex 10, Volume III. Every aircraft registered in Nicaragua 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 1 distinct

Callsign Airline Flights Last seen
TGACG - 182 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 TGACG - Jul 25, 16:30 UTCJul 25, 16:50 UTC20m
2026-07-25 TGACG - Jul 25, 14:35 UTCJul 25, 14:55 UTC20m
2026-07-24 TGACG - Jul 24, 15:50 UTCJul 24, 16:10 UTC20m
2026-07-24 TGACG - Jul 24, 13:30 UTCJul 24, 13:50 UTC20m
2026-07-23 TGACG - Jul 23, 19:35 UTCJul 23, 19:55 UTC20m
2026-07-23 TGACG - Jul 23, 16:50 UTCJul 23, 17:10 UTC20m
2026-07-23 TGACG - Jul 23, 15:30 UTCJul 23, 15:45 UTC15m
2026-07-23 TGACG - Jul 23, 13:15 UTCJul 23, 13:25 UTC10m
2026-07-22 TGACG GUA → GUA Jul 22, 15:40 UTCJul 22, 17:00 UTC1h 20m
2026-07-21 TGACG - Jul 21, 19:25 UTCJul 21, 19:50 UTC25m
2026-07-21 TGACG - Jul 21, 17:20 UTCJul 21, 17:50 UTC30m
2026-07-21 TGACG GUA → GUA Jul 21, 15:05 UTCJul 21, 16:35 UTC1h 30m
2026-07-20 TGACG - Jul 20, 21:25 UTCJul 20, 21:55 UTC30m
2026-07-20 TGACG - Jul 20, 18:10 UTCJul 20, 18:25 UTC15m
2026-07-19 TGACG - Jul 19, 17:05 UTCJul 19, 17:25 UTC20m
2026-07-19 TGACG - Jul 19, 14:45 UTCJul 19, 15:05 UTC20m
2026-07-18 TGACG - Jul 18, 16:25 UTCJul 18, 16:50 UTC25m
2026-07-18 TGACG - Jul 18, 13:45 UTCJul 18, 14:45 UTC1h 0m
2026-07-17 TGACG GUA → GUA Jul 17, 23:14 UTCJul 17, 23:35 UTC20m
2026-07-15 TGACG - Jul 15, 13:50 UTCJul 15, 14:15 UTC25m
2026-07-15 TGACG - Jul 15, 12:55 UTCJul 15, 13:15 UTC20m
2026-07-14 TGACG - Jul 14, 20:15 UTCJul 14, 20:55 UTC40m
2026-07-14 TGACG - Jul 14, 16:35 UTCJul 14, 17:35 UTC1h 0m
2026-07-14 TGACG - Jul 14, 15:40 UTCJul 14, 16:15 UTC35m
2026-07-14 TGACG - Jul 14, 14:10 UTCJul 14, 14:30 UTC20m
2026-07-12 TGACG GUA → GUA Jul 12, 14:50 UTCJul 12, 14:55 UTC5m
2026-07-11 TGACG GUA → GUA Jul 11, 14:50 UTCJul 11, 15:55 UTC1h 5m
2026-07-10 TGACG GUA → GUA Jul 10, 21:55 UTCJul 10, 22:30 UTC35m
2026-07-10 TGACG - Jul 10, 17:10 UTCJul 10, 17:20 UTC10m
2026-07-10 TGACG - Jul 10, 15:45 UTCJul 10, 16:05 UTC20m
2026-07-09 TGACG - Jul 9, 20:30 UTCJul 9, 20:45 UTC15m
2026-07-09 TGACG - Jul 9, 17:30 UTCJul 9, 17:40 UTC10m
2026-07-09 TGACG - Jul 9, 15:30 UTCJul 9, 15:40 UTC10m
2026-07-09 TGACG - Jul 9, 12:45 UTCJul 9, 13:05 UTC20m
2026-07-08 TGACG - Jul 8, 17:20 UTCJul 8, 17:40 UTC20m
2026-07-08 TGACG - Jul 8, 14:10 UTCJul 8, 14:45 UTC35m
2026-07-08 TGACG - Jul 8, 12:45 UTCJul 8, 13:00 UTC15m
2026-07-07 TGACG - Jul 7, 16:20 UTCJul 7, 16:40 UTC20m
2026-07-07 TGACG - Jul 7, 15:25 UTCJul 7, 15:40 UTC15m
2026-07-07 TGACG - Jul 7, 14:25 UTCJul 7, 14:40 UTC15m
2026-07-07 TGACG - Jul 7, 12:40 UTCJul 7, 13:15 UTC35m
2026-07-05 TGACG - Jul 5, 18:20 UTCJul 5, 18:45 UTC25m
2026-07-05 TGACG - Jul 5, 12:55 UTCJul 5, 13:15 UTC20m
2026-07-04 TGACG - Jul 4, 23:50 UTCJul 5, 00:10 UTC20m
2026-07-04 TGACG - Jul 4, 18:50 UTCJul 4, 19:05 UTC15m
2026-07-04 TGACG - Jul 4, 17:30 UTCJul 4, 17:45 UTC15m
2026-07-04 TGACG - Jul 4, 12:35 UTCJul 4, 12:50 UTC15m
2026-07-03 TGACG - Jul 3, 16:35 UTCJul 3, 17:05 UTC30m
2026-07-03 TGACG - Jul 3, 15:35 UTCJul 3, 15:55 UTC20m
2026-07-03 TGACG - Jul 3, 14:10 UTCJul 3, 14:50 UTC40m

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 TG-ACG page for operator, model, and routing details .

Mode-S 0B4156 frequently asked

What is Mode-S code 0B4156?
0B4156 is an ICAO 24-bit transponder address. Allocated to Nicaragua. Assigned to TG-ACG.
Where is Mode-S 0B4156 registered?
Mode-S code 0B4156 is allocated to Nicaragua (NI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0B4156 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 16:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0B4156, octal 02640526, decimal 737,622.
What flights does 0B4156 operate?
Mode-S 0B4156 has broadcast 1 distinct callsign, including TGACG.