Apparatus

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sensors Mode-S transponder

AC9F52

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N912NN · BOEING 737-800 · operated by BANK OF UTAH TRUSTEE

Hex
AC9F52
Octal
53117522
Decimal
11,312,978
Country
US
Tail
N912NN
Type
B738
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
523
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S AC9F52.

Country allocation

The ICAO 24-bit address AC9F52 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
AAL2581 - 8 2026-07-03
AAL310 American Airlines 5 2026-06-28
AAL2735 American Airlines 5 2026-06-11
AAL2509 American Airlines 5 2026-07-26
AAL1828 - 5 2026-06-21
AAL1523 - 5 2026-06-28
AAL866 - 4 2026-07-14
AAL670 - 4 2026-06-16
AAL393 - 4 2026-07-15
AAL3201 American Airlines 4 2026-07-21
AAL2225 - 4 2026-07-12
AAL1734 American Airlines 4 2026-05-23
AAL1464 - 4 2026-04-14
AAL1294 - 4 2026-07-09
AAL1074 American Airlines 4 2026-06-10
AAL1049 - 4 2026-07-20
AAL394 - 3 2026-07-15
AAL390 - 3 2026-07-11
AAL389 - 3 2026-07-11
AAL363 American Airlines 3 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1897 RDU → CLT Jul 26, 19:05 UTCJul 26, 21:00 UTC1h 55m
2026-07-26 AAL2814 BOS → AUS Jul 26, 15:40 UTCJul 26, 17:50 UTC2h 10m
2026-07-26 AAL2814 BOS → AUS Jul 26, 15:40 UTCJul 26, 17:45 UTC2h 5m
2026-07-26 AAL2814 BOS → AUS Jul 26, 12:25 UTCJul 26, 14:30 UTC2h 5m
2026-07-26 AAL2509 DCA → MCO Jul 26, 00:50 UTCJul 26, 02:55 UTC2h 5m
2026-07-25 AAL2509 DCA → MCO Jul 25, 21:35 UTCJul 25, 23:40 UTC2h 5m
2026-07-25 AAL1609 PHX → DCA Jul 25, 17:00 UTCJul 25, 20:00 UTC3h 0m
2026-07-25 AAL1609 PHX → DCA Jul 25, 16:59 UTCJul 25, 20:04 UTC3h 5m
2026-07-25 AAL1609 PHX → DCA Jul 25, 12:45 UTCJul 25, 15:40 UTC2h 55m
2026-07-25 AAL656 SJU → MIA Jul 25, 10:05 UTCJul 25, 10:40 UTC35m
2026-07-25 AAL656 SJU → MIA Jul 25, 10:02 UTCJul 25, 10:35 UTC33m
2026-07-25 AAL1458 DFW → OKC Jul 25, 03:40 UTCJul 25, 04:25 UTC45m
2026-07-25 AAL2158 CLT → MSY Jul 25, 01:10 UTCJul 25, 02:20 UTC1h 10m
2026-07-24 AAL2158 CLT → MSY Jul 24, 22:40 UTCJul 24, 23:50 UTC1h 10m
2026-07-24 AAL2438 DFW → IAH Jul 24, 18:45 UTCJul 24, 21:00 UTC2h 15m
2026-07-24 AAL2438 DFW → IAH Jul 24, 15:00 UTCJul 24, 17:15 UTC2h 15m
2026-07-24 AAL2560 PHL → TPA Jul 24, 11:40 UTCJul 24, 13:15 UTC1h 35m
2026-07-24 AAL1201 PHL → MIA Jul 24, 02:35 UTCJul 24, 04:05 UTC1h 30m
2026-07-23 AAL1496 PHL → SJU Jul 23, 23:25 UTCJul 24, 00:50 UTC1h 25m
2026-07-23 AAL1484 SAT → ORD Jul 23, 18:10 UTCJul 23, 21:50 UTC3h 40m
2026-07-23 AAL1892 MIA → PHL Jul 23, 15:20 UTCJul 23, 16:20 UTC1h 0m
2026-07-23 AAL2544 DFW → TYS Jul 23, 02:20 UTCJul 23, 03:55 UTC1h 35m
2026-07-22 AAL1253 SFO → ORD Jul 22, 21:15 UTCJul 23, 01:15 UTC4h 0m
2026-07-22 AAL1598 LAX → ORD Jul 22, 15:15 UTCJul 22, 18:45 UTC3h 30m
2026-07-21 AAL3201 ORD → BOS Jul 21, 20:50 UTCJul 22, 00:45 UTC3h 55m
2026-07-21 AAL1946 SAN → DFW Jul 21, 16:25 UTCJul 21, 19:35 UTC3h 10m
2026-07-21 AAL455 AUS → PHX Jul 21, 11:25 UTCJul 21, 13:20 UTC1h 55m
2026-07-21 AAL3026 DFW → OAX Jul 21, 00:25 UTCJul 21, 03:30 UTC3h 5m
2026-07-20 AAL1049 DFW → JFK Jul 20, 19:10 UTCJul 20, 22:25 UTC3h 15m
2026-07-20 AAL1049 DFW → JFK Jul 20, 19:10 UTCJul 20, 22:21 UTC3h 11m
2026-07-20 AAL3052 ORD → DFW Jul 20, 15:02 UTCJul 20, 16:51 UTC1h 49m
2026-07-20 AAL3052 - Jul 20, 15:05 UTCJul 20, 16:30 UTC1h 25m
2026-07-20 AAL1509 BOS → ORD Jul 20, 11:10 UTCJul 20, 13:19 UTC2h 9m
2026-07-20 AAL1509 BOS → ORD Jul 20, 11:10 UTCJul 20, 13:20 UTC2h 10m
2026-07-20 AAL3107 PHL → BOS Jul 20, 02:45 UTCJul 20, 04:30 UTC1h 45m
2026-07-19 AAL250 - Jul 19, 20:10 UTCJul 19, 23:50 UTC3h 40m
2026-07-19 AAL249 - Jul 19, 15:00 UTCJul 19, 18:25 UTC3h 25m
2026-07-19 AAL3106 IAH → ORD Jul 19, 11:25 UTCJul 19, 13:30 UTC2h 5m
2026-07-19 AAL3106 IAH → ORD Jul 19, 11:21 UTCJul 19, 13:23 UTC2h 2m
2026-07-19 AAL3144 - Jul 19, 04:55 UTCJul 19, 07:10 UTC2h 15m
2026-07-18 AAL2520 SEA → ORD Jul 18, 22:15 UTCJul 19, 01:40 UTC3h 25m
2026-07-18 AAL2520 ORD → SEA Jul 18, 15:15 UTCJul 18, 19:15 UTC4h 0m
2026-07-18 AAL2102 - Jul 18, 11:15 UTCJul 18, 13:25 UTC2h 10m
2026-07-17 AAL2449 DFW → JAX Jul 17, 23:39 UTCJul 18, 01:45 UTC2h 5m
2026-07-17 AAL2572 SJC → DFW Jul 17, 19:00 UTCJul 17, 22:25 UTC3h 25m
2026-07-17 AAL2572 DFW → SJC Jul 17, 14:30 UTCJul 17, 17:35 UTC3h 5m
2026-07-17 AAL2787 - Jul 17, 11:10 UTCJul 17, 12:30 UTC1h 20m
2026-07-17 AAL2787 BNA → DFW Jul 17, 11:08 UTCJul 17, 12:43 UTC1h 35m
2026-07-17 AAL1076 DFW → BNA Jul 17, 00:11 UTCJul 17, 01:42 UTC1h 31m
2026-07-17 AAL1076 DFW → BNA Jul 17, 00:14 UTCJul 17, 01:45 UTC1h 30m

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 N912NN page for operator, model, and routing details .

Mode-S AC9F52 frequently asked

What is Mode-S code AC9F52?
AC9F52 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N912NN.
Where is Mode-S AC9F52 registered?
Mode-S code AC9F52 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 AC9F52 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC9F52, octal 53117522, decimal 11,312,978.
What flights does AC9F52 operate?
Mode-S AC9F52 has broadcast 20 distinct callsigns, including AAL2581, AAL310, AAL2735, AAL2509, AAL1828.