Apparatus

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sensors Mode-S transponder

A05648

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N12012 · BOEING 787-10 Dreamliner · operated by UNITED AIRLINES INC

Hex
A05648
Octal
50053110
Decimal
10,507,848
Country
US
Tail
N12012
Type
B78X
No current signal · last broadcast 1h ago
Flights observed
202
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A05648.

Country allocation

The ICAO 24-bit address A05648 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
UAL415 - 12 2026-07-18
UAL423 - 10 2026-07-16
UAL970 - 9 2026-07-14
UAL416 United Airlines 9 2026-07-18
UAL906 - 8 2026-06-21
UAL882 United Airlines 8 2026-06-06
UAL971 - 7 2026-07-15
UAL907 United Airlines 7 2026-06-21
UAL845 United Airlines 7 2026-07-05
UAL38 - 7 2026-06-27
UAL2692 United Airlines 7 2026-06-10
UAL994 United Airlines 6 2026-06-29
UAL987 United Airlines 6 2026-07-19
UAL986 - 6 2026-07-20
UAL973 - 6 2026-06-30
UAL844 - 6 2026-07-06
UAL65 - 6 2026-06-14
UAL422 - 6 2026-07-15
UAL39 United Airlines 6 2026-06-05
UAL995 United Airlines 5 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 UAL986 - Jul 20, 10:30 UTCJul 20, 11:50 UTC1h 20m
2026-07-19 UAL987 ORD → CDG Jul 19, 23:52 UTCJul 20, 06:57 UTC7h 5m
2026-07-19 UAL987 ORD → CDG Jul 19, 23:35 UTCJul 20, 07:00 UTC7h 25m
2026-07-18 UAL415 MXP → ORD Jul 18, 15:25 UTCJul 19, 00:00 UTC8h 35m
2026-07-18 UAL416 ORD → MXP Jul 18, 03:33 UTCJul 18, 11:33 UTC8h 0m
2026-07-18 UAL416 ORD → MXP Jul 18, 03:35 UTCJul 18, 11:30 UTC7h 55m
2026-07-17 UAL415 MXP → ORD Jul 17, 14:15 UTCJul 17, 23:05 UTC8h 50m
2026-07-17 UAL416 - Jul 17, 03:05 UTCJul 17, 11:10 UTC8h 5m
2026-07-16 UAL423 ATH → ORD Jul 16, 10:15 UTCJul 16, 20:45 UTC10h 30m
2026-07-15 UAL422 - Jul 15, 21:50 UTCJul 16, 07:20 UTC9h 30m
2026-07-15 UAL971 - Jul 15, 08:30 UTCJul 15, 17:50 UTC9h 20m
2026-07-14 UAL970 - Jul 14, 21:35 UTCJul 15, 06:10 UTC8h 34m
2026-07-14 UAL971 - Jul 14, 08:45 UTCJul 14, 18:00 UTC9h 15m
2026-07-13 UAL970 ORD → FCO Jul 13, 21:22 UTCJul 14, 05:43 UTC8h 21m
2026-07-13 UAL970 ORD → FCO Jul 13, 21:00 UTCJul 14, 05:50 UTC8h 50m
2026-07-13 UAL971 - Jul 13, 08:20 UTCJul 13, 17:40 UTC9h 20m
2026-07-12 UAL970 - Jul 12, 21:10 UTCJul 13, 05:50 UTC8h 40m
2026-07-12 UAL970 ORD → FCO Jul 12, 21:22 UTCJul 13, 05:45 UTC8h 23m
2026-07-12 UAL218 - Jul 12, 02:30 UTCJul 12, 10:01 UTC7h 30m
2026-07-11 UAL219 - Jul 11, 22:50 UTCJul 11, 23:00 UTC10m
2026-07-11 UAL219 - Jul 11, 14:55 UTCJul 11, 18:50 UTC3h 55m
2026-07-10 UAL770 BCN → ORD Jul 10, 14:45 UTCJul 10, 23:45 UTC9h 0m
2026-07-10 UAL769 - Jul 10, 04:45 UTCJul 10, 12:25 UTC7h 40m
2026-07-08 UAL971 - Jul 8, 16:00 UTCJul 9, 01:20 UTC9h 20m
2026-07-08 UAL970 - Jul 8, 05:15 UTCJul 8, 13:50 UTC8h 35m
2026-07-07 UAL970 - Jul 7, 22:00 UTCJul 7, 23:35 UTC1h 35m
2026-07-07 UAL986 - Jul 7, 10:05 UTCJul 7, 18:00 UTC7h 55m
2026-07-07 UAL987 - Jul 7, 00:05 UTCJul 7, 07:25 UTC7h 20m
2026-07-06 UAL844 - Jul 6, 01:45 UTCJul 6, 11:30 UTC9h 45m
2026-07-05 UAL845 ORD → GRU Jul 5, 05:30 UTCJul 5, 14:55 UTC9h 25m
2026-07-05 UAL415 - Jul 5, 01:00 UTCJul 5, 01:15 UTC15m
2026-07-04 UAL415 MXP → ORD Jul 4, 15:50 UTCJul 5, 00:45 UTC8h 55m
2026-07-04 UAL415 MXP → ORD Jul 4, 15:40 UTCJul 5, 01:15 UTC9h 35m
2026-07-04 UAL416 - Jul 4, 05:55 UTCJul 4, 13:35 UTC7h 40m
2026-07-03 UAL415 MXP → ORD Jul 3, 15:26 UTCJul 4, 00:18 UTC8h 52m
2026-07-03 UAL415 MXP → ORD Jul 3, 15:30 UTCJul 4, 00:30 UTC9h 0m
2026-07-03 UAL416 ORD → MXP Jul 3, 05:18 UTCJul 3, 12:33 UTC7h 15m
2026-07-03 UAL416 ORD → MXP Jul 3, 05:05 UTCJul 3, 12:40 UTC7h 35m
2026-07-02 UAL415 MXP → ORD Jul 2, 14:10 UTCJul 2, 23:20 UTC9h 10m
2026-07-02 UAL415 MXP → ORD Jul 2, 14:10 UTCJul 2, 23:10 UTC9h 0m
2026-07-02 UAL415 - Jul 2, 14:20 UTCJul 2, 16:00 UTC1h 40m
2026-07-02 UAL416 ORD → MXP Jul 2, 03:58 UTCJul 2, 11:35 UTC7h 37m
2026-07-02 UAL416 ORD → MXP Jul 2, 03:50 UTCJul 2, 11:40 UTC7h 50m
2026-07-01 UAL423 ORD → ORD Jul 1, 20:40 UTCJul 1, 20:45 UTC5m
2026-07-01 UAL423 ATH → ORD Jul 1, 10:00 UTCJul 1, 20:24 UTC10h 24m
2026-07-01 UAL423 ATH → ORD Jul 1, 10:05 UTCJul 1, 20:45 UTC10h 40m
2026-06-30 UAL422 - Jun 30, 22:10 UTCJul 1, 07:40 UTC9h 30m
2026-06-30 UAL973 - Jun 30, 08:35 UTCJun 30, 16:35 UTC8h 0m
2026-06-29 UAL994 PBI → ORD Jun 29, 23:05 UTCJun 30, 05:20 UTC6h 16m
2026-06-29 UAL2303 - Jun 29, 06:44 UTCJun 29, 11:14 UTC4h 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 N12012 page for operator, model, and routing details .

Mode-S A05648 frequently asked

What is Mode-S code A05648?
A05648 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N12012.
Where is Mode-S A05648 registered?
Mode-S code A05648 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 A05648 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05648, octal 50053110, decimal 10,507,848.
What flights does A05648 operate?
Mode-S A05648 has broadcast 20 distinct callsigns, including UAL415, UAL423, UAL970, UAL416, UAL906.