Apparatus

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sensors Mode-S transponder

A05627

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N12004 · BOEING 787-10 Dreamliner · operated by UNITED AIRLINES INC

Hex
A05627
Octal
50053047
Decimal
10,507,815
Country
US
Tail
N12004
Type
B78X
No current signal · last broadcast 20h ago
Flights observed
230
Distinct callsigns
20
Country
US
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S A05627.

Country allocation

The ICAO 24-bit address A05627 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
UAL971 - 20 2026-07-06
UAL944 - 18 2026-07-02
UAL945 - 16 2026-07-03
UAL970 - 15 2026-07-05
UAL906 - 15 2026-07-07
UAL882 - 13 2026-07-13
UAL39 - 10 2026-06-21
UAL986 - 9 2026-07-09
UAL907 United Airlines 9 2026-07-07
UAL881 - 9 2026-07-12
UAL38 - 9 2026-06-22
UAL972 - 7 2026-06-13
UAL935 United Airlines 6 2026-04-14
UAL845 - 6 2026-07-11
UAL987 - 5 2026-07-09
UAL973 - 5 2026-06-25
UAL844 - 5 2026-07-12
UAL2397 - 5 2026-06-23
UAL994 United Airlines 4 2026-06-25
UAL65 - 4 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 UAL882 HND → ORD Jul 13, 09:35 UTCJul 13, 20:40 UTC11h 5m
2026-07-12 UAL881 ORD → HND Jul 12, 17:46 UTCJul 13, 05:30 UTC11h 44m
2026-07-12 UAL881 - Jul 12, 17:30 UTCJul 13, 05:25 UTC11h 55m
2026-07-12 UAL844 GRU → ORD Jul 12, 01:40 UTCJul 12, 11:35 UTC9h 55m
2026-07-11 UAL845 - Jul 11, 03:20 UTCJul 11, 12:40 UTC9h 20m
2026-07-10 UAL423 ATH → ORD Jul 10, 10:05 UTCJul 10, 20:45 UTC10h 40m
2026-07-09 UAL422 - Jul 9, 22:20 UTCJul 10, 07:55 UTC9h 35m
2026-07-09 UAL986 CDG → ORD Jul 9, 10:22 UTCJul 9, 18:23 UTC8h 1m
2026-07-09 UAL986 CDG → ORD Jul 9, 10:22 UTCJul 9, 18:14 UTC7h 52m
2026-07-09 UAL987 ORD → CDG Jul 9, 00:40 UTCJul 9, 08:05 UTC7h 25m
2026-07-07 UAL906 - Jul 7, 19:20 UTCJul 7, 19:45 UTC25m
2026-07-07 UAL906 - Jul 7, 11:00 UTCJul 7, 17:45 UTC6h 45m
2026-07-07 UAL906 FRA → ORD Jul 7, 10:59 UTCJul 7, 19:05 UTC8h 6m
2026-07-07 UAL906 FRA → ORD Jul 7, 10:59 UTCJul 7, 19:26 UTC8h 27m
2026-07-07 UAL907 ORD → FRA Jul 7, 00:05 UTCJul 7, 07:35 UTC7h 30m
2026-07-07 UAL907 ORD → FRA Jul 7, 00:12 UTCJul 7, 07:33 UTC7h 21m
2026-07-06 UAL971 - Jul 6, 08:50 UTCJul 6, 18:10 UTC9h 20m
2026-07-05 UAL970 - Jul 5, 22:10 UTCJul 6, 03:45 UTC5h 35m
2026-07-05 UAL970 ORD → FCO Jul 5, 22:22 UTCJul 6, 06:19 UTC7h 57m
2026-07-05 UAL971 - Jul 5, 08:55 UTCJul 5, 18:35 UTC9h 40m
2026-07-04 UAL970 ORD → FCO Jul 4, 22:25 UTCJul 5, 06:35 UTC8h 10m
2026-07-04 UAL971 - Jul 4, 08:35 UTCJul 4, 18:05 UTC9h 30m
2026-07-03 UAL970 - Jul 3, 21:50 UTCJul 4, 06:00 UTC8h 10m
2026-07-03 UAL945 FRA → ORD Jul 3, 07:40 UTCJul 3, 16:30 UTC8h 50m
2026-07-03 UAL945 FRA → ORD Jul 3, 07:38 UTCJul 3, 16:12 UTC8h 34m
2026-07-02 UAL944 ORD → FRA Jul 2, 22:17 UTCJul 3, 05:22 UTC7h 5m
2026-07-02 UAL944 - Jul 2, 22:10 UTCJul 3, 03:45 UTC5h 35m
2026-07-02 UAL218 - Jul 2, 02:25 UTCJul 2, 09:45 UTC7h 20m
2026-07-02 UAL218 HNL → ORD Jul 2, 02:18 UTCJul 2, 09:31 UTC7h 13m
2026-07-01 UAL219 - Jul 1, 23:15 UTCJul 1, 23:30 UTC15m
2026-07-01 UAL219 - Jul 1, 15:10 UTCJul 1, 19:15 UTC4h 5m
2026-06-30 UAL945 FRA → ORD Jun 30, 07:15 UTCJun 30, 15:35 UTC8h 20m
2026-06-30 UAL945 FRA → ORD Jun 30, 07:08 UTCJun 30, 15:21 UTC8h 13m
2026-06-29 UAL944 ORD → FRA Jun 29, 20:30 UTCJun 30, 03:50 UTC7h 21m
2026-06-29 UAL945 FRA → ORD Jun 29, 07:15 UTCJun 29, 15:45 UTC8h 30m
2026-06-28 UAL944 ORD → FRA Jun 28, 20:47 UTCJun 29, 04:12 UTC7h 25m
2026-06-28 UAL944 - Jun 28, 20:29 UTCJun 29, 04:09 UTC7h 40m
2026-06-28 UAL945 FRA → ORD Jun 28, 07:14 UTCJun 28, 15:29 UTC8h 15m
2026-06-27 UAL944 - Jun 27, 20:19 UTCJun 28, 03:50 UTC7h 30m
2026-06-27 UAL945 - Jun 27, 07:10 UTCJun 27, 08:44 UTC1h 35m
2026-06-27 UAL944 - Jun 27, 02:14 UTCJun 27, 04:15 UTC2h 0m
2026-06-26 UAL944 ORD → FRA Jun 26, 21:02 UTCJun 27, 04:09 UTC7h 7m
2026-06-26 UAL944 - Jun 26, 20:40 UTCJun 26, 22:55 UTC2h 15m
2026-06-26 UAL945 - Jun 26, 15:54 UTCJun 26, 16:00 UTC5m
2026-06-26 UAL945 FRA → ORD Jun 26, 07:30 UTCJun 26, 16:00 UTC8h 30m
2026-06-26 UAL945 FRA → ORD Jun 26, 07:18 UTCJun 26, 15:35 UTC8h 17m
2026-06-25 UAL944 - Jun 25, 21:40 UTCJun 26, 03:45 UTC6h 5m
2026-06-25 UAL944 ORD → FRA Jun 25, 21:47 UTCJun 26, 05:13 UTC7h 26m
2026-06-25 UAL973 BRU → ORD Jun 25, 09:50 UTCJun 25, 17:54 UTC8h 5m
2026-06-25 UAL994 PBI → ORD Jun 25, 01:24 UTCJun 25, 07:45 UTC6h 20m

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 N12004 page for operator, model, and routing details .

Mode-S A05627 frequently asked

What is Mode-S code A05627?
A05627 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N12004.
Where is Mode-S A05627 registered?
Mode-S code A05627 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 A05627 broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05627, octal 50053047, decimal 10,507,815.
What flights does A05627 operate?
Mode-S A05627 has broadcast 20 distinct callsigns, including UAL971, UAL944, UAL945, UAL970, UAL906.