Apparatus

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sensors Mode-S transponder

A05646

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N12010 · BOEING 787-10 Dreamliner · operated by UNITED AIRLINES INC

Hex
A05646
Octal
50053106
Decimal
10,507,846
Country
US
Tail
N12010
Type
B78X
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
263
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A05646.

Country allocation

The ICAO 24-bit address A05646 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
UAL945 United Airlines 21 2026-07-20
UAL944 United Airlines 16 2026-07-19
UAL906 - 15 2026-07-14
UAL972 - 14 2026-07-15
UAL907 - 12 2026-07-14
UAL995 - 11 2026-07-15
UAL218 United Airlines 11 2026-07-24
UAL882 United Airlines 10 2026-07-25
UAL986 - 8 2026-07-02
UAL973 - 8 2026-07-18
UAL881 United Airlines 8 2026-07-24
UAL844 United Airlines 8 2026-07-23
UAL423 United Airlines 8 2026-07-26
UAL422 United Airlines 8 2026-07-25
UAL219 United Airlines 8 2026-07-23
UAL39 - 7 2026-06-24
UAL994 - 6 2026-07-17
UAL987 - 6 2026-07-02
UAL845 - 6 2026-07-22
UAL2303 United Airlines 6 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL423 YYZ → DEN Jul 26, 11:05 UTCJul 26, 21:30 UTC10h 25m
2026-07-25 UAL422 DEN → BOS Jul 25, 23:25 UTCJul 26, 08:40 UTC9h 16m
2026-07-25 UAL422 DEN → BOS Jul 25, 23:28 UTCJul 26, 08:37 UTC9h 9m
2026-07-25 UAL882 HND → ORD Jul 25, 08:40 UTCJul 25, 19:40 UTC11h 0m
2026-07-24 UAL881 ORD → HND Jul 24, 18:06 UTCJul 25, 06:10 UTC12h 4m
2026-07-24 UAL881 ORD → HND Jul 24, 17:50 UTCJul 25, 05:30 UTC11h 40m
2026-07-24 UAL218 HNL → ORD Jul 24, 05:55 UTCJul 24, 09:45 UTC3h 50m
2026-07-24 UAL218 HNL → ORD Jul 24, 02:35 UTCJul 24, 02:50 UTC15m
2026-07-23 UAL219 ORD → HNL Jul 23, 15:05 UTCJul 23, 23:30 UTC8h 25m
2026-07-23 UAL219 ORD → HNL Jul 23, 15:09 UTCJul 23, 23:28 UTC8h 19m
2026-07-23 UAL844 GRU → ORD Jul 23, 01:35 UTCJul 23, 11:15 UTC9h 40m
2026-07-22 UAL845 - Jul 22, 03:10 UTCJul 22, 13:00 UTC9h 50m
2026-07-21 UAL882 HND → ORD Jul 21, 11:20 UTCJul 21, 22:25 UTC11h 5m
2026-07-20 UAL881 ORD → HND Jul 20, 19:20 UTCJul 21, 08:35 UTC13h 14m
2026-07-20 UAL945 FRA → ORD Jul 20, 07:20 UTCJul 20, 09:20 UTC2h 0m
2026-07-20 UAL945 FRA → ORD Jul 20, 07:08 UTCJul 20, 15:38 UTC8h 30m
2026-07-19 UAL944 ORD → FRA Jul 19, 20:50 UTCJul 20, 04:25 UTC7h 35m
2026-07-19 UAL945 FRA → ORD Jul 19, 07:15 UTCJul 19, 15:35 UTC8h 20m
2026-07-18 UAL944 ORD → FRA Jul 18, 20:45 UTCJul 19, 04:15 UTC7h 30m
2026-07-18 UAL973 BRU → ORD Jul 18, 08:25 UTCJul 18, 16:25 UTC8h 0m
2026-07-17 UAL994 - Jul 17, 23:10 UTCJul 18, 05:45 UTC6h 36m
2026-07-16 UAL1981 DEN → LGA Jul 16, 18:44 UTCJul 16, 23:35 UTC4h 50m
2026-07-16 UAL1981 DEN → LGA Jul 16, 18:37 UTCJul 16, 23:34 UTC4h 57m
2026-07-16 UAL2445 - Jul 16, 11:30 UTCJul 16, 16:09 UTC4h 40m
2026-07-15 UAL995 BRU → EWR Jul 15, 09:50 UTCJul 15, 17:15 UTC7h 25m
2026-07-15 UAL972 - Jul 15, 00:00 UTCJul 15, 07:25 UTC7h 25m
2026-07-14 UAL972 ORD → BRU Jul 14, 23:57 UTCJul 15, 07:21 UTC7h 24m
2026-07-14 UAL906 - Jul 14, 11:00 UTCJul 14, 19:20 UTC8h 20m
2026-07-14 UAL907 - Jul 14, 00:25 UTCJul 14, 08:15 UTC7h 50m
2026-07-13 UAL906 FRA → ORD Jul 13, 11:00 UTCJul 13, 19:05 UTC8h 5m
2026-07-13 UAL907 - Jul 13, 00:01 UTCJul 13, 07:50 UTC7h 50m
2026-07-11 UAL218 - Jul 11, 02:20 UTCJul 11, 09:45 UTC7h 25m
2026-07-10 UAL219 - Jul 10, 15:00 UTCJul 10, 23:15 UTC8h 16m
2026-07-10 UAL844 - Jul 10, 01:40 UTCJul 10, 11:25 UTC9h 45m
2026-07-09 UAL845 - Jul 9, 04:45 UTCJul 9, 14:00 UTC9h 15m
2026-07-08 UAL415 MXP → ORD Jul 8, 13:40 UTCJul 8, 22:40 UTC9h 0m
2026-07-08 UAL416 - Jul 8, 03:20 UTCJul 8, 11:25 UTC8h 5m
2026-07-05 UAL906 FRA → ORD Jul 5, 12:40 UTCJul 5, 21:05 UTC8h 25m
2026-07-05 UAL907 ORD → FRA Jul 5, 03:00 UTCJul 5, 10:20 UTC7h 20m
2026-07-04 UAL906 FRA → ORD Jul 4, 13:15 UTCJul 4, 23:05 UTC9h 50m
2026-07-04 UAL906 FRA → ORD Jul 4, 12:59 UTCJul 4, 22:53 UTC9h 54m
2026-07-04 UAL907 ORD → FRA Jul 4, 08:50 UTCJul 4, 10:40 UTC1h 50m
2026-07-04 UAL907 ORD → FRA Jul 4, 03:25 UTCJul 4, 05:35 UTC2h 10m
2026-07-03 UAL423 ATH → ORD Jul 3, 11:15 UTCJul 3, 22:00 UTC10h 45m
2026-07-02 UAL422 - Jul 2, 23:15 UTCJul 2, 23:30 UTC15m
2026-07-02 UAL422 ORD → ATH Jul 2, 23:13 UTCJul 3, 08:14 UTC9h 1m
2026-07-02 UAL986 ORD → ORD Jul 2, 19:35 UTCJul 2, 19:40 UTC5m
2026-07-02 UAL986 - Jul 2, 11:15 UTCJul 2, 19:40 UTC8h 25m
2026-07-02 UAL986 CDG → ORD Jul 2, 11:19 UTCJul 2, 19:16 UTC7h 57m
2026-07-02 UAL987 ORD → CDG Jul 2, 01:55 UTCJul 2, 09:10 UTC7h 15m

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 N12010 page for operator, model, and routing details .

Mode-S A05646 frequently asked

What is Mode-S code A05646?
A05646 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N12010.
Where is Mode-S A05646 registered?
Mode-S code A05646 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 A05646 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05646, octal 50053106, decimal 10,507,846.
What flights does A05646 operate?
Mode-S A05646 has broadcast 20 distinct callsigns, including UAL945, UAL944, UAL906, UAL972, UAL907.