Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AA56DB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N76529 · BOEING 737-800 · operated by UNITED AIRLINES INC, ATTN TREASURER

Hex
AA56DB
Octal
52453333
Decimal
11,163,355
Country
US
Tail
N76529
Type
B738
Broadcasting now · callsign UAL2605 · 9,975 ft
Flights observed
418
Distinct callsigns
20
Country
US
Last broadcast
25m ago

Current position

AA56DB is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AA56DB 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
UAL464 - 6 2026-06-22
UAL2422 - 5 2026-07-12
UAL590 United Airlines 4 2026-05-28
UAL2401 - 4 2026-07-12
UAL2257 - 4 2026-06-28
UAL1811 - 4 2026-07-12
UAL1185 - 4 2026-07-02
UAL1100 - 4 2026-06-22
UAL645 United Airlines 3 2026-04-29
UAL602 United Airlines 3 2026-05-05
UAL571 United Airlines 3 2026-06-25
UAL424 - 3 2026-06-15
UAL296 - 3 2026-06-28
UAL2742 United Airlines 3 2026-04-29
UAL2741 - 3 2026-07-05
UAL2449 - 3 2026-06-30
UAL2333 United Airlines 3 2026-05-18
UAL2318 United Airlines 3 2026-05-26
UAL2299 - 3 2026-07-10
UAL2267 - 3 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL2605 - Jul 14, 23:50 UTCJul 15, 00:45 UTC55m
2026-07-14 UAL699 - Jul 14, 20:10 UTCJul 14, 22:15 UTC2h 5m
2026-07-14 UAL699 IAH → ORD Jul 14, 20:05 UTCJul 14, 21:54 UTC1h 49m
2026-07-14 UAL2638 - Jul 14, 15:50 UTCJul 14, 18:05 UTC2h 15m
2026-07-13 UAL1504 LGA → ORD Jul 13, 19:55 UTCJul 13, 21:45 UTC1h 50m
2026-07-13 UAL1775 - Jul 13, 16:25 UTCJul 13, 18:10 UTC1h 45m
2026-07-13 UAL1491 - Jul 13, 13:05 UTCJul 13, 14:10 UTC1h 5m
2026-07-13 UAL1851 - Jul 13, 01:35 UTCJul 13, 02:35 UTC1h 0m
2026-07-12 UAL2422 - Jul 12, 20:35 UTCJul 12, 23:35 UTC3h 0m
2026-07-12 UAL2401 - Jul 12, 16:25 UTCJul 12, 18:50 UTC2h 25m
2026-07-12 UAL1811 PHL → ORD Jul 12, 12:22 UTCJul 12, 13:50 UTC1h 28m
2026-07-12 UAL1811 PHL → ORD Jul 12, 12:10 UTCJul 12, 14:05 UTC1h 55m
2026-07-12 UAL1214 DEN → PHL Jul 12, 06:05 UTCJul 12, 09:10 UTC3h 5m
2026-07-12 UAL1269 YYC → DEN Jul 12, 01:45 UTCJul 12, 03:40 UTC1h 55m
2026-07-11 UAL2232 DEN → YYC Jul 11, 22:05 UTCJul 12, 00:05 UTC2h 0m
2026-07-11 UAL2200 LGA → DEN Jul 11, 16:30 UTCJul 11, 20:05 UTC3h 35m
2026-07-11 UAL2092 ORD → LGA Jul 11, 13:10 UTCJul 11, 14:50 UTC1h 40m
2026-07-10 UAL2299 - Jul 10, 23:45 UTCJul 10, 23:50 UTC5m
2026-07-10 UAL2299 DFW → ORD Jul 10, 21:50 UTCJul 10, 23:50 UTC2h 0m
2026-07-10 UAL2299 DFW → ORD Jul 10, 21:27 UTCJul 10, 23:26 UTC1h 59m
2026-07-10 UAL685 ORD → DFW Jul 10, 17:49 UTCJul 10, 19:11 UTC1h 22m
2026-07-10 UAL685 - Jul 10, 17:30 UTCJul 10, 19:30 UTC2h 0m
2026-07-10 UAL1057 LGA → ORD Jul 10, 13:25 UTCJul 10, 15:35 UTC2h 10m
2026-07-10 UAL3918 EWR → LGA Jul 10, 11:49 UTCJul 10, 12:04 UTC15m
2026-07-10 UAL3918 EWR → LGA Jul 10, 11:50 UTCJul 10, 12:05 UTC15m
2026-07-10 UAL2809 ORD → EWR Jul 10, 07:05 UTCJul 10, 08:35 UTC1h 30m
2026-07-09 UAL2151 PDX → DEN Jul 9, 13:15 UTCJul 9, 13:45 UTC30m
2026-07-09 UAL2151 PDX → DEN Jul 9, 13:27 UTCJul 9, 13:38 UTC11m
2026-07-09 UAL630 ORD → MSN Jul 9, 03:35 UTCJul 9, 04:05 UTC30m
2026-07-08 UAL2797 PHL → ORD Jul 8, 23:15 UTCJul 9, 01:05 UTC1h 50m
2026-07-08 UAL2797 PHL → ORD Jul 8, 23:17 UTCJul 9, 00:48 UTC1h 31m
2026-07-08 UAL2430 ORD → PHL Jul 8, 19:55 UTCJul 8, 21:35 UTC1h 40m
2026-07-08 UAL1968 - Jul 8, 14:40 UTCJul 8, 17:30 UTC2h 50m
2026-07-08 UAL1156 ORD → YYC Jul 8, 01:30 UTCJul 8, 04:40 UTC3h 10m
2026-07-07 UAL2422 - Jul 7, 20:30 UTCJul 7, 23:20 UTC2h 50m
2026-07-07 UAL2401 - Jul 7, 16:05 UTCJul 7, 18:35 UTC2h 30m
2026-07-07 UAL1811 PHL → ORD Jul 7, 12:25 UTCJul 7, 14:20 UTC1h 55m
2026-07-07 UAL1776 ORD → PHL Jul 7, 03:10 UTCJul 7, 04:40 UTC1h 30m
2026-07-06 UAL1156 LGA → ORD Jul 6, 23:10 UTCJul 7, 01:35 UTC2h 25m
2026-07-06 UAL2267 ORD → LGA Jul 6, 19:00 UTCJul 6, 20:35 UTC1h 35m
2026-07-06 UAL202 AUS → ORD Jul 6, 13:40 UTCJul 6, 15:55 UTC2h 15m
2026-07-06 UAL1179 - Jul 6, 03:45 UTCJul 6, 04:10 UTC25m
2026-07-05 UAL2741 LAS → IAH Jul 5, 23:01 UTCJul 6, 02:14 UTC3h 13m
2026-07-05 UAL2741 - Jul 5, 23:45 UTCJul 6, 02:15 UTC2h 30m
2026-07-05 UAL2741 - Jul 5, 20:35 UTCJul 5, 21:20 UTC45m
2026-07-05 UAL2487 - Jul 5, 17:20 UTCJul 5, 18:15 UTC55m
2026-07-05 UAL1481 EWR → CLT Jul 5, 14:20 UTCJul 5, 15:45 UTC1h 25m
2026-07-05 UAL2436 SFO → DEN Jul 5, 02:20 UTCJul 5, 04:01 UTC1h 41m
2026-07-05 UAL2436 SFO → DEN Jul 5, 02:05 UTCJul 5, 04:05 UTC2h 0m
2026-07-04 UAL1243 - Jul 4, 22:05 UTCJul 5, 00:05 UTC2h 0m

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 N76529 page for operator, model, and routing details .

Mode-S AA56DB frequently asked

What is Mode-S code AA56DB?
AA56DB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N76529.
Where is Mode-S AA56DB registered?
Mode-S code AA56DB 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 AA56DB broadcasting right now?
Yes. Mode-S AA56DB is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA56DB, octal 52453333, decimal 11,163,355.
What flights does AA56DB operate?
Mode-S AA56DB has broadcast 20 distinct callsigns, including UAL464, UAL2422, UAL590, UAL2401, UAL2257.