Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACBF63

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N920NN · BOEING 737-800 · operated by UMB BANK NA TRUSTEE

Hex
ACBF63
Octal
53137543
Decimal
11,321,187
Country
US
Tail
N920NN
Type
B738
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
559
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S ACBF63.

Country allocation

The ICAO 24-bit address ACBF63 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
AAL874 - 10 2026-07-03
AAL814 - 6 2026-07-14
AAL1376 American Airlines 6 2026-07-24
AAL1358 American Airlines 6 2026-07-25
AAL1081 - 6 2026-06-15
AAL324 American Airlines 5 2026-04-15
AAL1842 American Airlines 5 2026-04-18
AAL994 - 4 2026-06-15
AAL604 - 4 2026-04-13
AAL495 - 4 2026-06-26
AAL3148 - 4 2026-07-15
AAL2851 American Airlines 4 2026-05-13
AAL2807 American Airlines 4 2026-06-09
AAL2361 American Airlines 4 2026-04-15
AAL1980 - 4 2026-06-17
AAL1900 - 4 2026-07-01
AAL891 American Airlines 3 2026-07-23
AAL768 American Airlines 3 2026-05-16
AAL584 American Airlines 3 2026-04-26
AAL409 American Airlines 3 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL409 JFK → MIA Jul 26, 15:45 UTCJul 26, 22:45 UTC7h 0m
2026-07-26 AAL2193 TUS → DFW Jul 26, 12:00 UTCJul 26, 12:45 UTC45m
2026-07-26 AAL2193 TUS → DFW Jul 26, 12:00 UTCJul 26, 13:51 UTC1h 51m
2026-07-26 AAL1109 ORD → DFW Jul 26, 04:10 UTCJul 26, 05:55 UTC1h 45m
2026-07-26 AAL1109 ORD → DFW Jul 26, 04:08 UTCJul 26, 05:54 UTC1h 46m
2026-07-26 AAL1945 PHL → CLE Jul 26, 00:40 UTCJul 26, 02:30 UTC1h 50m
2026-07-25 AAL1945 PHL → CLE Jul 25, 21:55 UTCJul 25, 23:45 UTC1h 50m
2026-07-25 AAL1358 DTW → CLT Jul 25, 18:35 UTCJul 25, 20:20 UTC1h 45m
2026-07-25 AAL1358 DTW → CLT Jul 25, 18:33 UTCJul 25, 20:15 UTC1h 42m
2026-07-25 AAL1358 DTW → CLT Jul 25, 15:45 UTCJul 25, 17:30 UTC1h 45m
2026-07-25 AAL955 LGA → DFW Jul 25, 13:10 UTCJul 25, 14:15 UTC1h 5m
2026-07-25 AAL2267 DFW → MCI Jul 25, 01:35 UTCJul 25, 03:05 UTC1h 30m
2026-07-24 AAL1376 CLT → EWR Jul 24, 22:00 UTCJul 24, 23:55 UTC1h 55m
2026-07-24 AAL1376 CLT → EWR Jul 24, 21:59 UTCJul 24, 23:53 UTC1h 54m
2026-07-24 AAL1376 CLT → EWR Jul 24, 18:45 UTCJul 24, 20:30 UTC1h 45m
2026-07-24 AAL413 DCA → LGA Jul 24, 16:10 UTCJul 24, 16:55 UTC45m
2026-07-24 AAL413 DCA → LGA Jul 24, 14:15 UTCJul 24, 14:55 UTC40m
2026-07-24 AAL2789 BDL → ORD Jul 24, 10:00 UTCJul 24, 12:10 UTC2h 10m
2026-07-24 AAL2506 TPA → PHL Jul 24, 01:50 UTCJul 24, 03:45 UTC1h 55m
2026-07-24 AAL2506 TPA → PHL Jul 24, 01:46 UTCJul 24, 03:47 UTC2h 1m
2026-07-23 AAL1376 CLT → EWR Jul 23, 22:06 UTCJul 23, 23:46 UTC1h 40m
2026-07-23 AAL1376 CLT → EWR Jul 23, 22:10 UTCJul 23, 23:50 UTC1h 40m
2026-07-23 AAL1376 CLT → EWR Jul 23, 19:10 UTCJul 23, 20:55 UTC1h 45m
2026-07-23 AAL891 LAX → SFO Jul 23, 15:44 UTCJul 23, 17:28 UTC1h 44m
2026-07-23 AAL891 LAX → SFO Jul 23, 15:45 UTCJul 23, 17:30 UTC1h 45m
2026-07-23 AAL891 LAX → SFO Jul 23, 12:40 UTCJul 23, 14:25 UTC1h 45m
2026-07-23 AAL9790 PHL → DCA Jul 23, 07:20 UTCJul 23, 10:00 UTC2h 40m
2026-07-17 AAL3091 CLT → LGA Jul 17, 03:55 UTCJul 17, 06:29 UTC2h 35m
2026-07-17 AAL2519 - Jul 17, 00:40 UTCJul 17, 02:30 UTC1h 50m
2026-07-17 AAL2519 SDF → DFW Jul 17, 00:35 UTCJul 17, 02:16 UTC1h 41m
2026-07-16 AAL2519 - Jul 16, 21:35 UTCJul 16, 23:15 UTC1h 40m
2026-07-16 AAL2341 - Jul 16, 17:54 UTCJul 16, 19:35 UTC1h 40m
2026-07-16 AAL2341 QRO → DFW Jul 16, 17:31 UTCJul 16, 19:29 UTC1h 58m
2026-07-16 AAL1236 - Jul 16, 14:20 UTCJul 16, 15:45 UTC1h 25m
2026-07-16 AAL1236 DFW → QRO Jul 16, 14:18 UTCJul 16, 16:09 UTC1h 51m
2026-07-16 AAL2770 ATL → DFW Jul 16, 10:55 UTCJul 16, 12:44 UTC1h 50m
2026-07-16 AAL1045 - Jul 16, 00:20 UTCJul 16, 01:45 UTC1h 25m
2026-07-15 AAL3148 - Jul 15, 19:45 UTCJul 15, 22:20 UTC2h 35m
2026-07-15 AAL3148 ORD → MIA Jul 15, 19:44 UTCJul 15, 22:19 UTC2h 35m
2026-07-14 AAL814 GEG → ORD Jul 14, 22:00 UTCJul 15, 01:15 UTC3h 14m
2026-07-14 AAL814 - Jul 14, 16:45 UTCJul 14, 19:55 UTC3h 10m
2026-07-14 AAL1239 BOS → ORD Jul 14, 13:10 UTCJul 14, 15:10 UTC2h 0m
2026-07-14 AAL2595 - Jul 14, 00:45 UTCJul 14, 02:30 UTC1h 45m
2026-07-13 AAL1294 JFK → CLT Jul 13, 21:51 UTCJul 13, 23:14 UTC1h 23m
2026-07-13 AAL1294 - Jul 13, 21:55 UTCJul 13, 23:15 UTC1h 20m
2026-07-11 AAL1203 DFW → JFK Jul 11, 23:40 UTCJul 12, 02:50 UTC3h 10m
2026-07-11 AAL1358 - Jul 11, 17:55 UTCJul 11, 18:45 UTC50m
2026-07-11 AAL1358 ATL → DFW Jul 11, 17:51 UTCJul 11, 19:40 UTC1h 49m
2026-07-11 AAL1358 DFW → ATL Jul 11, 14:55 UTCJul 11, 16:35 UTC1h 40m
2026-07-11 AAL2728 EWR → DFW Jul 11, 10:10 UTCJul 11, 13:30 UTC3h 20m

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 N920NN page for operator, model, and routing details .

Mode-S ACBF63 frequently asked

What is Mode-S code ACBF63?
ACBF63 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N920NN.
Where is Mode-S ACBF63 registered?
Mode-S code ACBF63 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 ACBF63 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACBF63, octal 53137543, decimal 11,321,187.
What flights does ACBF63 operate?
Mode-S ACBF63 has broadcast 20 distinct callsigns, including AAL874, AAL814, AAL1376, AAL1358, AAL1081.