Apparatus

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sensors Mode-S transponder

A9E8C3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N738A · BOEING 737-700 · operated by U S MARSHALS SERVICE, JPATS - AIR OPERATIONS

Hex
A9E8C3
Octal
52364303
Decimal
11,135,171
Country
US
Tail
N738A
Type
B737
No current signal · last broadcast 20d ago
Flights observed
85
Distinct callsigns
20
Country
US
Last broadcast
20d ago

Last known position

Most recent position reported by Mode-S A9E8C3.

Country allocation

The ICAO 24-bit address A9E8C3 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 20 distinct

Callsign Airline Flights Last seen
DOJ63 - 4 2026-06-04
DOJ62 - 4 2026-05-14
DOJ60 - 4 2026-05-12
DOJ59 - 4 2026-05-07
DOJ55 - 4 2026-04-23
DOJ347 - 4 2026-07-13
DOJ319 - 4 2026-06-18
DOJ317 - 4 2026-06-17
DOJ68 - 3 2026-07-16
DOJ66 - 3 2026-07-14
DOJ64 - 3 2026-06-10
DOJ61 - 3 2026-05-13
DOJ58 - 3 2026-04-30
DOJ54 - 3 2026-04-22
DOJ53 - 3 2026-04-21
DOJ52 - 3 2026-04-16
DOJ314 - 3 2026-06-16
DOJ313 - 3 2026-06-15
DOJ311 - 3 2026-06-12
DOJ70 - 2 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 DOJ71 - Jul 23, 18:50 UTCJul 23, 19:40 UTC50m
2026-07-22 DOJ70 BFI → OKC Jul 22, 20:10 UTCJul 22, 23:25 UTC3h 15m
2026-07-22 DOJ70 - Jul 22, 15:50 UTCJul 22, 18:45 UTC2h 55m
2026-07-21 DOJ69 BFI → ANC Jul 21, 17:45 UTCJul 21, 20:55 UTC3h 10m
2026-07-21 DOJ69 - Jul 21, 12:45 UTCJul 21, 16:05 UTC3h 20m
2026-07-16 DOJ68 - Jul 16, 20:15 UTCJul 16, 21:00 UTC45m
2026-07-16 DOJ68 - Jul 16, 16:19 UTCJul 16, 18:00 UTC1h 40m
2026-07-16 DOJ68 - Jul 16, 13:00 UTCJul 16, 14:40 UTC1h 40m
2026-07-15 DOJ67 COS → OKC Jul 15, 17:15 UTCJul 15, 18:20 UTC1h 5m
2026-07-15 DOJ67 - Jul 15, 15:00 UTCJul 15, 16:25 UTC1h 25m
2026-07-14 DOJ66 - Jul 14, 23:05 UTCJul 15, 00:00 UTC55m
2026-07-14 DOJ66 - Jul 14, 20:20 UTCJul 14, 21:50 UTC1h 30m
2026-07-14 DOJ66 - Jul 14, 15:10 UTCJul 14, 19:25 UTC4h 15m
2026-07-13 DOJ347 - Jul 13, 18:55 UTCJul 13, 20:15 UTC1h 20m
2026-07-13 DOJ347 - Jul 13, 17:20 UTCJul 13, 17:50 UTC30m
2026-07-13 DOJ347 FSD → RST Jul 13, 15:55 UTCJul 13, 16:30 UTC35m
2026-07-13 DOJ347 OKC → FSD Jul 13, 13:35 UTCJul 13, 15:00 UTC1h 25m
2026-07-01 DOJ332 - Jul 1, 17:20 UTCJul 1, 20:10 UTC2h 50m
2026-07-01 DOJ332 - Jul 1, 12:35 UTCJul 1, 15:20 UTC2h 45m
2026-06-18 DOJ319 - Jun 18, 18:00 UTCJun 18, 19:45 UTC1h 45m
2026-06-18 DOJ319 - Jun 18, 16:15 UTCJun 18, 16:55 UTC40m
2026-06-18 DOJ319 - Jun 18, 14:45 UTCJun 18, 15:25 UTC40m
2026-06-18 DOJ319 - Jun 18, 12:45 UTCJun 18, 13:45 UTC1h 0m
2026-06-17 DOJ317 - Jun 17, 17:35 UTCJun 17, 18:40 UTC1h 5m
2026-06-17 DOJ317 - Jun 17, 15:50 UTCJun 17, 16:30 UTC40m
2026-06-17 DOJ317 - Jun 17, 14:10 UTCJun 17, 14:50 UTC40m
2026-06-17 DOJ317 - Jun 17, 12:15 UTCJun 17, 13:05 UTC50m
2026-06-16 DOJ314 - Jun 16, 17:24 UTCJun 16, 18:35 UTC1h 10m
2026-06-16 DOJ314 - Jun 16, 15:15 UTCJun 16, 16:15 UTC1h 0m
2026-06-16 DOJ314 OKC → ATL Jun 16, 12:45 UTCJun 16, 14:20 UTC1h 35m
2026-06-15 DOJ313 - Jun 15, 19:35 UTCJun 15, 20:45 UTC1h 10m
2026-06-15 DOJ313 - Jun 15, 17:34 UTCJun 15, 18:25 UTC50m
2026-06-15 DOJ313 - Jun 15, 14:00 UTCJun 15, 16:19 UTC2h 20m
2026-06-12 DOJ311 - Jun 12, 18:01 UTCJun 12, 19:05 UTC1h 5m
2026-06-12 DOJ311 - Jun 12, 15:50 UTCJun 12, 16:35 UTC45m
2026-06-12 DOJ311 - Jun 12, 14:01 UTCJun 12, 15:05 UTC1h 5m
2026-06-11 DOJ65 COS → OKC Jun 11, 17:05 UTCJun 11, 18:05 UTC1h 0m
2026-06-11 DOJ65 - Jun 11, 15:05 UTCJun 11, 16:15 UTC1h 10m
2026-06-10 DOJ64 - Jun 10, 21:10 UTCJun 10, 22:00 UTC50m
2026-06-10 DOJ64 - Jun 10, 17:50 UTCJun 10, 19:20 UTC1h 30m
2026-06-10 DOJ64 - Jun 10, 13:20 UTCJun 10, 17:05 UTC3h 45m
2026-06-04 DOJ63 - Jun 4, 19:35 UTCJun 4, 20:20 UTC45m
2026-06-04 DOJ63 - Jun 4, 17:35 UTCJun 4, 18:40 UTC1h 5m
2026-06-04 DOJ63 - Jun 4, 15:25 UTCJun 4, 16:30 UTC1h 5m
2026-06-04 DOJ63 - Jun 4, 12:55 UTCJun 4, 13:40 UTC45m
2026-05-19 DOJ01 - May 19, 15:05 UTCMay 19, 16:50 UTC1h 45m
2026-05-14 DOJ62 - May 14, 23:05 UTCMay 14, 23:50 UTC45m
2026-05-14 DOJ62 COS → OKC May 14, 21:00 UTCMay 14, 22:00 UTC1h 0m
2026-05-14 DOJ62 SUU → COS May 14, 17:50 UTCMay 14, 19:55 UTC2h 5m
2026-05-14 DOJ62 - May 14, 14:55 UTCMay 14, 16:35 UTC1h 40m

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 N738A page for operator, model, and routing details .

Mode-S A9E8C3 frequently asked

What is Mode-S code A9E8C3?
A9E8C3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N738A.
Where is Mode-S A9E8C3 registered?
Mode-S code A9E8C3 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 A9E8C3 broadcasting right now?
No active broadcast right now. Last signal was 20d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9E8C3, octal 52364303, decimal 11,135,171.
What flights does A9E8C3 operate?
Mode-S A9E8C3 has broadcast 20 distinct callsigns, including DOJ63, DOJ62, DOJ60, DOJ59, DOJ55.