Apparatus

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sensors Mode-S transponder

ACDD1B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N928NN · BOEING 737-800 · operated by BANK OF UTAH TRUSTEE

Hex
ACDD1B
Octal
53156433
Decimal
11,328,795
Country
US
Tail
N928NN
Type
B738
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
546
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S ACDD1B.

Country allocation

The ICAO 24-bit address ACDD1B 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
AAL2066 American Airlines 6 2026-07-22
AAL1819 - 6 2026-07-10
AAL1616 American Airlines 6 2026-07-25
AAL1468 - 6 2026-07-19
AAL2351 - 5 2026-06-23
AAL2350 - 5 2026-06-22
AAL2322 - 5 2026-07-17
AAL2321 - 5 2026-07-11
AAL2058 American Airlines 5 2026-06-09
AAL1796 American Airlines 5 2026-06-26
AAL3008 American Airlines 4 2026-04-15
AAL2640 American Airlines 4 2026-04-18
AAL2059 American Airlines 4 2026-04-16
AAL1955 - 4 2026-06-22
AAL1724 - 4 2026-07-23
AAL1279 - 4 2026-07-19
AAL1083 American Airlines 4 2026-07-17
AAL1042 American Airlines 4 2026-07-25
AAL892 American Airlines 3 2026-04-30
AAL845 - 3 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1920 PHL → ORD Jul 26, 22:35 UTCJul 26, 22:45 UTC10m
2026-07-26 AAL1920 PHL → ORD Jul 26, 18:55 UTCJul 26, 20:55 UTC2h 0m
2026-07-26 AAL2487 MCI → DFW Jul 26, 15:00 UTCJul 26, 17:30 UTC2h 30m
2026-07-26 AAL2487 MCI → DFW Jul 26, 11:25 UTCJul 26, 13:45 UTC2h 20m
2026-07-25 AAL1614 SFO → DFW Jul 25, 23:55 UTCJul 26, 01:15 UTC1h 20m
2026-07-25 AAL1614 SFO → DFW Jul 25, 21:45 UTCJul 25, 22:55 UTC1h 10m
2026-07-25 AAL1616 BDL → PHL Jul 25, 18:00 UTCJul 25, 19:25 UTC1h 25m
2026-07-25 AAL1616 BDL → PHL Jul 25, 17:57 UTCJul 25, 19:23 UTC1h 26m
2026-07-25 AAL1616 BDL → PHL Jul 25, 15:25 UTCJul 25, 16:45 UTC1h 20m
2026-07-25 AAL1042 DFW → MIA Jul 25, 11:40 UTCJul 25, 13:40 UTC2h 0m
2026-07-25 AAL1042 DFW → MIA Jul 25, 11:37 UTCJul 25, 13:31 UTC1h 54m
2026-07-25 AAL2628 DFW → OMA Jul 25, 02:50 UTCJul 25, 04:15 UTC1h 25m
2026-07-25 AAL2628 DFW → OMA Jul 25, 02:45 UTCJul 25, 04:10 UTC1h 25m
2026-07-24 AAL584 DFW → TUS Jul 24, 23:05 UTCJul 25, 01:00 UTC1h 55m
2026-07-24 AAL584 DFW → TUS Jul 24, 20:00 UTCJul 24, 21:45 UTC1h 45m
2026-07-24 AAL2290 PHL → IND Jul 24, 15:45 UTCJul 24, 18:05 UTC2h 20m
2026-07-24 AAL2290 PHL → IND Jul 24, 12:10 UTCJul 24, 14:25 UTC2h 15m
2026-07-24 AAL2290 PHL → IND Jul 24, 12:10 UTCJul 24, 14:24 UTC2h 14m
2026-07-24 AAL971 LAX → DFW Jul 24, 07:55 UTCJul 24, 10:25 UTC2h 30m
2026-07-24 AAL971 LAX → DFW Jul 24, 07:52 UTCJul 24, 10:25 UTC2h 33m
2026-07-24 AAL3287 LGA → DFW Jul 24, 03:05 UTCJul 24, 05:40 UTC2h 35m
2026-07-23 AAL1005 NAS → DFW Jul 23, 22:20 UTCJul 24, 00:55 UTC2h 35m
2026-07-23 AAL1005 NAS → DFW Jul 23, 18:10 UTCJul 23, 20:40 UTC2h 30m
2026-07-23 AAL3052 - Jul 23, 15:00 UTCJul 23, 16:45 UTC1h 45m
2026-07-23 AAL3052 ORD → DFW Jul 23, 14:58 UTCJul 23, 16:45 UTC1h 47m
2026-07-23 AAL462 PHX → ATL Jul 23, 10:50 UTCJul 23, 13:00 UTC2h 10m
2026-07-23 AAL1724 ORD → LGA Jul 23, 00:05 UTCJul 23, 01:30 UTC1h 25m
2026-07-23 AAL1724 ORD → LGA Jul 23, 00:00 UTCJul 23, 01:29 UTC1h 29m
2026-07-22 AAL2066 DFW → SLC Jul 22, 19:35 UTCJul 22, 22:15 UTC2h 40m
2026-07-22 AAL2066 DFW → SLC Jul 22, 15:45 UTCJul 22, 17:55 UTC2h 10m
2026-07-22 AAL2066 DFW → SLC Jul 22, 15:42 UTCJul 22, 17:52 UTC2h 10m
2026-07-22 AAL2112 - Jul 22, 12:25 UTCJul 22, 13:50 UTC1h 25m
2026-07-22 AAL574 PIT → DFW Jul 22, 00:05 UTCJul 22, 02:35 UTC2h 30m
2026-07-21 AAL2818 - Jul 21, 20:20 UTCJul 21, 22:40 UTC2h 20m
2026-07-21 AAL2818 CLE → DFW Jul 21, 20:15 UTCJul 21, 22:36 UTC2h 21m
2026-07-21 AAL2818 DFW → CLE Jul 21, 16:40 UTCJul 21, 19:00 UTC2h 20m
2026-07-19 AAL1385 PHL → PHX Jul 19, 20:30 UTCJul 20, 02:20 UTC5h 50m
2026-07-19 AAL1279 - Jul 19, 17:00 UTCJul 19, 19:05 UTC2h 5m
2026-07-19 AAL1279 DFW → CMH Jul 19, 12:30 UTCJul 19, 14:30 UTC2h 0m
2026-07-19 AAL2342 SAT → DFW Jul 19, 10:10 UTCJul 19, 10:55 UTC45m
2026-07-19 AAL1468 - Jul 19, 02:15 UTCJul 19, 04:45 UTC2h 30m
2026-07-19 AAL1468 MIA → SAT Jul 19, 02:13 UTCJul 19, 04:46 UTC2h 33m
2026-07-18 AAL1105 LAS → MIA Jul 18, 20:00 UTCJul 19, 00:25 UTC4h 25m
2026-07-18 AAL2037 PHL → DFW Jul 18, 18:01 UTCJul 18, 18:44 UTC43m
2026-07-18 AAL2037 PHL → DFW Jul 18, 18:00 UTCJul 18, 18:45 UTC45m
2026-07-18 AAL3333 DEN → CLT Jul 18, 12:15 UTCJul 18, 12:45 UTC30m
2026-07-18 AAL3333 DEN → CLT Jul 18, 12:12 UTCJul 18, 16:06 UTC3h 54m
2026-07-17 AAL2322 PHL → TPA Jul 17, 23:14 UTCJul 18, 01:20 UTC2h 5m
2026-07-17 AAL1684 PHL → MCO Jul 17, 19:25 UTCJul 17, 21:39 UTC2h 15m
2026-07-17 AAL1684 PHL → MCO Jul 17, 19:22 UTCJul 17, 21:39 UTC2h 17m

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 N928NN page for operator, model, and routing details .

Mode-S ACDD1B frequently asked

What is Mode-S code ACDD1B?
ACDD1B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N928NN.
Where is Mode-S ACDD1B registered?
Mode-S code ACDD1B 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 ACDD1B 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 ACDD1B, octal 53156433, decimal 11,328,795.
What flights does ACDD1B operate?
Mode-S ACDD1B has broadcast 20 distinct callsigns, including AAL2066, AAL1819, AAL1616, AAL1468, AAL2351.