Apparatus

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sensors Mode-S transponder

AB351A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N821FL · BOMBARDIER Regional Jet CRJ-200 · operated by GULF & CARIBBEAN CARGO INC

Hex
AB351A
Octal
52632432
Decimal
11,220,250
Country
US
Tail
N821FL
Type
CRJ2
Broadcasting now · callsign TSU1015 · 33,000 ft
Flights observed
80
Distinct callsigns
6
Country
US
Last broadcast
7m ago

Current position

AB351A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AB351A falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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 6 distinct

Callsign Airline Flights Last seen
TSU1015 Gulf & Caribbean Cargo / Contract Air Cargo 19 2026-05-30
TSU8364 Gulf & Caribbean Cargo / Contract Air Cargo 15 2026-05-29
TSU7567 Gulf & Caribbean Cargo / Contract Air Cargo 15 2026-05-29
TSU1016 Gulf & Caribbean Cargo / Contract Air Cargo 15 2026-05-02
TSU069 Gulf & Caribbean Cargo / Contract Air Cargo 15 2026-05-29
TSU821 - 1 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 TSU1015 TVF → SDF May 30, 03:20 UTCMay 30, 04:30 UTC1h 10m
2026-05-29 TSU069 MSP → TVF May 29, 09:30 UTCMay 29, 10:05 UTC35m
2026-05-29 TSU8364 MEM → MSP May 29, 07:25 UTCMay 29, 08:55 UTC1h 30m
2026-05-29 TSU7567 TVF → MEM May 29, 03:35 UTCMay 29, 05:40 UTC2h 5m
2026-05-28 TSU069 MSP → TVF May 28, 09:30 UTCMay 28, 10:05 UTC35m
2026-05-28 TSU8364 MEM → MSP May 28, 07:15 UTCMay 28, 08:50 UTC1h 35m
2026-05-28 TSU7567 TVF → MEM May 28, 03:40 UTCMay 28, 05:40 UTC2h 0m
2026-05-27 TSU069 MSP → TVF May 27, 09:30 UTCMay 27, 10:05 UTC35m
2026-05-27 TSU8364 MEM → MSP May 27, 07:20 UTCMay 27, 08:55 UTC1h 35m
2026-05-27 TSU7567 TVF → MEM May 27, 03:34 UTCMay 27, 05:35 UTC2h 0m
2026-05-22 TSU069 MSP → TVF May 22, 09:45 UTCMay 22, 10:25 UTC40m
2026-05-22 TSU8364 MEM → MSP May 22, 07:40 UTCMay 22, 09:10 UTC1h 30m
2026-05-22 TSU7567 TVF → MEM May 22, 03:40 UTCMay 22, 05:40 UTC2h 0m
2026-05-21 TSU069 MSP → TVF May 21, 09:50 UTCMay 21, 10:25 UTC35m
2026-05-21 TSU8364 MEM → MSP May 21, 07:45 UTCMay 21, 09:15 UTC1h 30m
2026-05-21 TSU7567 TVF → MEM May 21, 03:30 UTCMay 21, 05:35 UTC2h 5m
2026-05-20 TSU069 MSP → TVF May 20, 09:40 UTCMay 20, 10:15 UTC35m
2026-05-20 TSU8364 MEM → MSP May 20, 07:30 UTCMay 20, 09:05 UTC1h 35m
2026-05-20 TSU7567 TVF → MEM May 20, 03:35 UTCMay 20, 05:40 UTC2h 6m
2026-05-19 TSU069 MSP → TVF May 19, 09:45 UTCMay 19, 10:20 UTC35m
2026-05-19 TSU8364 MEM → MSP May 19, 07:40 UTCMay 19, 09:15 UTC1h 35m
2026-05-19 TSU7567 TVF → MEM May 19, 03:35 UTCMay 19, 06:00 UTC2h 25m
2026-05-15 TSU069 MSP → TVF May 15, 10:00 UTCMay 15, 10:40 UTC40m
2026-05-15 TSU8364 MEM → MSP May 15, 07:45 UTCMay 15, 09:20 UTC1h 35m
2026-05-15 TSU7567 TVF → MEM May 15, 03:35 UTCMay 15, 05:35 UTC2h 0m
2026-05-14 TSU069 MSP → TVF May 14, 10:31 UTCMay 14, 11:05 UTC35m
2026-05-14 TSU8364 MEM → MSP May 14, 08:00 UTCMay 14, 09:40 UTC1h 40m
2026-05-14 TSU7567 TVF → MEM May 14, 03:40 UTCMay 14, 05:25 UTC1h 45m
2026-05-13 TSU069 MSP → TVF May 13, 10:15 UTCMay 13, 10:55 UTC40m
2026-05-13 TSU8364 MEM → MSP May 13, 07:50 UTCMay 13, 09:40 UTC1h 50m
2026-05-13 TSU7567 TVF → MEM May 13, 03:40 UTCMay 13, 05:30 UTC1h 50m
2026-05-12 TSU069 MSP → TVF May 12, 10:15 UTCMay 12, 10:55 UTC40m
2026-05-12 TSU8364 MEM → MSP May 12, 07:40 UTCMay 12, 09:35 UTC1h 55m
2026-05-12 TSU7567 TVF → MEM May 12, 03:40 UTCMay 12, 05:40 UTC2h 0m
2026-05-08 TSU069 MSP → TVF May 8, 12:20 UTCMay 8, 12:55 UTC35m
2026-05-08 TSU8364 MEM → MSP May 8, 09:54 UTCMay 8, 11:34 UTC1h 40m
2026-05-08 TSU7567 TVF → MEM May 8, 03:39 UTCMay 8, 05:29 UTC1h 50m
2026-05-07 TSU069 MSP → TVF May 7, 09:50 UTCMay 7, 10:25 UTC35m
2026-05-07 TSU8364 MEM → MSP May 7, 07:35 UTCMay 7, 09:15 UTC1h 40m
2026-05-07 TSU7567 TVF → MEM May 7, 03:30 UTCMay 7, 05:30 UTC2h 0m
2026-05-06 TSU069 MSP → TVF May 6, 10:55 UTCMay 6, 11:30 UTC35m
2026-05-06 TSU8364 MEM → MSP May 6, 08:40 UTCMay 6, 10:20 UTC1h 40m
2026-05-06 TSU7567 TVF → MEM May 6, 04:20 UTCMay 6, 06:40 UTC2h 20m
2026-05-05 TSU069 MSP → TVF May 5, 09:50 UTCMay 5, 10:25 UTC35m
2026-05-05 TSU8364 MEM → MSP May 5, 07:30 UTCMay 5, 09:15 UTC1h 45m
2026-05-05 TSU7567 TVF → MEM May 5, 03:40 UTCMay 5, 05:40 UTC2h 0m
2026-05-02 TSU1016 SDF → TVF May 2, 09:55 UTCMay 2, 11:45 UTC1h 50m
2026-05-02 TSU1015 TVF → SDF May 2, 03:25 UTCMay 2, 05:10 UTC1h 45m
2026-05-01 TSU1016 SDF → TVF May 1, 09:10 UTCMay 1, 11:10 UTC2h 0m
2026-05-01 TSU1015 TVF → SDF May 1, 03:20 UTCMay 1, 05:10 UTC1h 50m

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 N821FL page for operator, model, and routing details .

Mode-S AB351A frequently asked

What is Mode-S code AB351A?
AB351A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N821FL.
Where is Mode-S AB351A registered?
Mode-S code AB351A is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is AB351A broadcasting right now?
Yes. Mode-S AB351A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB351A, octal 52632432, decimal 11,220,250.
What flights does AB351A operate?
Mode-S AB351A has broadcast 6 distinct callsigns, including TSU1015, TSU8364, TSU7567, TSU1016, TSU069.