Apparatus

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sensors Mode-S transponder

A9E50E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N737AB · CESSNA 172 Skyhawk · operated by BELLINGHAM AVIATION SERVICES LLC

Hex
A9E50E
Octal
52362416
Decimal
11,134,222
Country
US
Tail
N737AB
Type
C172
No current signal · last broadcast 6h ago
Flights observed
118
Distinct callsigns
1
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S A9E50E.

Country allocation

The ICAO 24-bit address A9E50E 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 1 distinct

Callsign Airline Flights Last seen
N737AB - 118 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-04 N737AB - Jun 4, 21:40 UTCJun 4, 22:20 UTC40m
2026-06-04 N737AB BLI → BLI Jun 4, 05:25 UTCJun 4, 05:45 UTC20m
2026-06-03 N737AB - Jun 3, 02:50 UTCJun 3, 03:40 UTC50m
2026-06-02 N737AB - Jun 2, 21:45 UTCJun 2, 22:45 UTC1h 0m
2026-06-02 N737AB - Jun 2, 19:40 UTCJun 2, 20:45 UTC1h 5m
2026-06-02 N737AB - Jun 2, 15:25 UTCJun 2, 16:50 UTC1h 25m
2026-06-01 N737AB BLI → BLI Jun 1, 17:05 UTCJun 1, 18:15 UTC1h 10m
2026-06-01 N737AB BLI → BLI Jun 1, 05:10 UTCJun 1, 07:20 UTC2h 10m
2026-06-01 N737AB - Jun 1, 01:20 UTCJun 1, 02:20 UTC1h 0m
2026-05-31 N737AB BLI → BLI May 31, 22:40 UTCMay 31, 23:50 UTC1h 10m
2026-05-31 N737AB - May 31, 20:15 UTCMay 31, 21:15 UTC1h 0m
2026-05-30 N737AB - May 30, 23:10 UTCMay 30, 23:45 UTC35m
2026-05-30 N737AB - May 30, 21:10 UTCMay 30, 21:50 UTC40m
2026-05-30 N737AB BLI → BLI May 30, 18:35 UTCMay 30, 19:50 UTC1h 15m
2026-05-30 N737AB - May 30, 15:40 UTCMay 30, 16:00 UTC20m
2026-05-29 N737AB BLI → BLI May 29, 21:55 UTCMay 29, 22:45 UTC50m
2026-05-29 N737AB BLI → BLI May 29, 19:35 UTCMay 29, 20:40 UTC1h 5m
2026-05-29 N737AB BLI → BLI May 29, 17:55 UTCMay 29, 18:40 UTC45m
2026-05-29 N737AB BLI → BLI May 29, 15:50 UTCMay 29, 16:50 UTC1h 0m
2026-05-29 N737AB - May 29, 01:40 UTCMay 29, 02:20 UTC40m
2026-05-28 N737AB BLI → BLI May 28, 23:50 UTCMay 29, 00:45 UTC55m
2026-05-28 N737AB BLI → BLI May 28, 21:25 UTCMay 28, 22:15 UTC50m
2026-05-28 N737AB - May 28, 18:45 UTCMay 28, 19:05 UTC20m
2026-05-28 N737AB - May 28, 16:05 UTCMay 28, 16:55 UTC50m
2026-05-28 N737AB BLI → BLI May 28, 00:35 UTCMay 28, 01:35 UTC1h 0m
2026-05-27 N737AB BLI → BLI May 27, 20:35 UTCMay 27, 21:15 UTC40m
2026-05-27 N737AB - May 27, 18:40 UTCMay 27, 19:45 UTC1h 5m
2026-05-27 N737AB BLI → BLI May 27, 15:45 UTCMay 27, 16:30 UTC45m
2026-05-25 N737AB - May 25, 02:00 UTCMay 25, 02:20 UTC20m
2026-05-24 N737AB BLI → BLI May 24, 20:45 UTCMay 24, 20:55 UTC10m
2026-05-24 N737AB BLI → BLI May 24, 19:05 UTCMay 24, 19:45 UTC40m
2026-05-24 N737AB BLI → BLI May 24, 16:40 UTCMay 24, 17:45 UTC1h 5m
2026-05-22 N737AB - May 22, 21:55 UTCMay 22, 22:10 UTC15m
2026-05-22 N737AB BLI → ESD May 22, 19:20 UTCMay 22, 19:35 UTC15m
2026-05-22 N737AB - May 22, 16:30 UTCMay 22, 16:40 UTC10m
2026-05-22 N737AB BLI → BLI May 22, 15:20 UTCMay 22, 15:45 UTC25m
2026-05-22 N737AB - May 22, 03:20 UTCMay 22, 03:45 UTC25m
2026-05-22 N737AB BLI → BLI May 22, 01:40 UTCMay 22, 02:30 UTC50m
2026-05-21 N737AB BLI → BLI May 21, 23:15 UTCMay 22, 00:25 UTC1h 10m
2026-05-21 N737AB - May 21, 20:35 UTCMay 21, 21:15 UTC40m
2026-05-21 N737AB BLI → BLI May 21, 17:50 UTCMay 21, 18:55 UTC1h 5m
2026-05-21 N737AB CKR → BLI May 21, 02:50 UTCMay 21, 04:35 UTC1h 45m
2026-05-21 N737AB - May 21, 00:45 UTCMay 21, 00:55 UTC10m
2026-05-20 N737AB - May 20, 23:05 UTCMay 20, 23:15 UTC10m
2026-05-20 N737AB - May 20, 21:20 UTCMay 20, 21:50 UTC30m
2026-05-19 N737AB - May 19, 22:00 UTCMay 19, 22:45 UTC45m
2026-05-19 N737AB - May 19, 16:30 UTCMay 19, 16:40 UTC10m
2026-05-19 N737AB - May 19, 01:40 UTCMay 19, 02:30 UTC50m
2026-05-18 N737AB - May 18, 23:15 UTCMay 18, 23:55 UTC40m
2026-05-18 N737AB - May 18, 20:05 UTCMay 18, 20:45 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 N737AB page for operator, model, and routing details .

Mode-S A9E50E frequently asked

What is Mode-S code A9E50E?
A9E50E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N737AB.
Where is Mode-S A9E50E registered?
Mode-S code A9E50E 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 A9E50E broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9E50E, octal 52362416, decimal 11,134,222.
What flights does A9E50E operate?
Mode-S A9E50E has broadcast 1 distinct callsign, including N737AB.