Apparatus

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sensors Mode-S transponder

A05669

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N12020 · BOEING 787-10 Dreamliner · operated by UNITED AIRLINES INC

Hex
A05669
Octal
50053151
Decimal
10,507,881
Country
US
Tail
N12020
Type
B78X
Broadcasting now · callsign UAL970 · 975 ft
Flights observed
241
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A05669 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A05669 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 - 16 2026-07-14
UAL416 - 14 2026-07-14
UAL125 - 13 2026-07-04
UAL219 - 11 2026-07-16
UAL218 - 11 2026-07-17
UAL906 - 10 2026-07-08
UAL882 - 10 2026-06-27
UAL995 - 9 2026-07-01
UAL907 United Airlines 9 2026-07-08
UAL845 - 9 2026-07-19
UAL65 - 9 2026-07-03
UAL987 - 8 2026-06-28
UAL986 - 8 2026-06-28
UAL970 United Airlines 8 2026-07-20
UAL844 United Airlines 8 2026-07-20
UAL124 - 8 2026-07-04
UAL972 - 7 2026-06-30
UAL971 - 7 2026-07-07
UAL994 United Airlines 6 2026-07-04
UAL881 - 6 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 UAL970 ORD → FCO Jul 20, 21:20 UTCJul 21, 04:15 UTC6h 54m
2026-07-20 UAL844 GRU → ORD Jul 20, 01:40 UTCJul 20, 11:15 UTC9h 35m
2026-07-20 UAL844 GRU → ORD Jul 20, 01:42 UTCJul 20, 11:15 UTC9h 33m
2026-07-19 UAL845 ORD → GRU Jul 19, 03:33 UTCJul 19, 13:00 UTC9h 27m
2026-07-19 UAL845 - Jul 19, 03:30 UTCJul 19, 12:50 UTC9h 20m
2026-07-18 UAL770 BCN → ORD Jul 18, 14:20 UTCJul 18, 22:40 UTC8h 20m
2026-07-18 UAL770 BCN → ORD Jul 18, 14:16 UTCJul 18, 22:21 UTC8h 5m
2026-07-18 UAL769 ORD → BCN Jul 18, 03:28 UTCJul 18, 11:18 UTC7h 50m
2026-07-18 UAL769 ORD → BCN Jul 18, 03:35 UTCJul 18, 11:20 UTC7h 45m
2026-07-17 UAL218 - Jul 17, 05:39 UTCJul 17, 09:45 UTC4h 5m
2026-07-17 UAL218 - Jul 17, 02:15 UTCJul 17, 02:30 UTC15m
2026-07-16 UAL219 - Jul 16, 23:10 UTCJul 16, 23:29 UTC20m
2026-07-16 UAL219 - Jul 16, 15:25 UTCJul 16, 19:10 UTC3h 45m
2026-07-16 UAL844 - Jul 16, 01:35 UTCJul 16, 11:10 UTC9h 35m
2026-07-15 UAL845 - Jul 15, 03:30 UTCJul 15, 12:55 UTC9h 25m
2026-07-14 UAL415 MXP → ORD Jul 14, 13:50 UTCJul 14, 22:45 UTC8h 54m
2026-07-14 UAL416 ORD → MXP Jul 14, 03:25 UTCJul 14, 11:45 UTC8h 20m
2026-07-13 UAL415 - Jul 13, 23:25 UTCJul 13, 23:30 UTC5m
2026-07-13 UAL415 MXP → ORD Jul 13, 14:37 UTCJul 13, 23:08 UTC8h 31m
2026-07-13 UAL415 - Jul 13, 14:55 UTCJul 13, 22:15 UTC7h 20m
2026-07-13 UAL416 ORD → MXP Jul 13, 03:13 UTCJul 13, 11:38 UTC8h 25m
2026-07-13 UAL416 ORD → MXP Jul 13, 03:25 UTCJul 13, 11:40 UTC8h 15m
2026-07-12 UAL415 MXP → ORD Jul 12, 13:58 UTCJul 12, 22:17 UTC8h 19m
2026-07-12 UAL415 - Jul 12, 13:50 UTCJul 12, 22:15 UTC8h 25m
2026-07-12 UAL416 - Jul 12, 09:05 UTCJul 12, 11:25 UTC2h 20m
2026-07-12 UAL416 - Jul 12, 03:15 UTCJul 12, 05:40 UTC2h 25m
2026-07-11 UAL415 MXP → ORD Jul 11, 14:15 UTCJul 11, 23:05 UTC8h 50m
2026-07-11 UAL416 ORD → MXP Jul 11, 03:45 UTCJul 11, 11:40 UTC7h 55m
2026-07-10 UAL415 MXP → ORD Jul 10, 14:55 UTCJul 10, 23:50 UTC8h 55m
2026-07-10 UAL416 - Jul 10, 09:45 UTCJul 10, 12:10 UTC2h 25m
2026-07-10 UAL416 - Jul 10, 04:00 UTCJul 10, 06:20 UTC2h 20m
2026-07-09 UAL415 - Jul 9, 23:10 UTCJul 9, 23:20 UTC10m
2026-07-09 UAL415 MXP → ORD Jul 9, 14:19 UTCJul 9, 22:51 UTC8h 32m
2026-07-09 UAL415 MXP → ORD Jul 9, 14:20 UTCJul 9, 23:20 UTC9h 0m
2026-07-09 UAL416 ORD → MXP Jul 9, 04:00 UTCJul 9, 12:00 UTC8h 0m
2026-07-08 UAL906 FRA → ORD Jul 8, 11:00 UTCJul 8, 19:35 UTC8h 35m
2026-07-08 UAL907 ORD → FRA Jul 8, 00:05 UTCJul 8, 07:40 UTC7h 35m
2026-07-08 UAL907 ORD → FRA Jul 8, 00:12 UTCJul 8, 07:29 UTC7h 17m
2026-07-07 UAL971 - Jul 7, 08:10 UTCJul 7, 17:10 UTC9h 0m
2026-07-06 UAL970 - Jul 6, 21:10 UTCJul 7, 05:25 UTC8h 15m
2026-07-06 UAL945 - Jul 6, 07:20 UTCJul 6, 10:30 UTC3h 10m
2026-07-06 UAL945 FRA → ORD Jul 6, 07:18 UTCJul 6, 15:33 UTC8h 15m
2026-07-05 UAL944 - Jul 5, 21:05 UTCJul 6, 04:40 UTC7h 35m
2026-07-05 UAL973 BRU → ORD Jul 5, 08:35 UTCJul 5, 16:40 UTC8h 5m
2026-07-04 UAL994 PBI → ORD Jul 4, 23:34 UTCJul 5, 05:50 UTC6h 16m
2026-07-04 UAL994 PBI → ORD Jul 4, 23:35 UTCJul 5, 04:15 UTC4h 40m
2026-07-04 UAL125 ATH → EWR Jul 4, 07:55 UTCJul 4, 17:55 UTC10h 0m
2026-07-04 UAL124 - Jul 4, 02:20 UTCJul 4, 04:55 UTC2h 35m
2026-07-03 UAL124 - Jul 3, 20:30 UTCJul 4, 02:15 UTC5h 45m
2026-07-03 UAL65 LIS → EWR Jul 3, 09:51 UTCJul 3, 16:35 UTC6h 44m

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 N12020 page for operator, model, and routing details .

Mode-S A05669 frequently asked

What is Mode-S code A05669?
A05669 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N12020.
Where is Mode-S A05669 registered?
Mode-S code A05669 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 A05669 broadcasting right now?
Yes. Mode-S A05669 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05669, octal 50053151, decimal 10,507,881.
What flights does A05669 operate?
Mode-S A05669 has broadcast 20 distinct callsigns, including UAL415, UAL416, UAL125, UAL219, UAL218.