Apparatus

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sensors Mode-S transponder

A0A522

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14001 · BOEING 787-10 Dreamliner · operated by UNITED AIRLINES INC

Hex
A0A522
Octal
50122442
Decimal
10,528,034
Country
US
Tail
N14001
Type
B78X
No current signal · last broadcast Jul 26, 19:55 UTC
Flights observed
265
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:55 UTC

Last known position

Most recent position reported by Mode-S A0A522.

Country allocation

The ICAO 24-bit address A0A522 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
UAL995 United Airlines 13 2026-07-22
UAL415 - 13 2026-06-22
UAL39 - 13 2026-07-09
UAL125 United Airlines 13 2026-07-23
UAL906 United Airlines 12 2026-07-26
UAL972 United Airlines 11 2026-07-21
UAL64 - 11 2026-07-16
UAL994 United Airlines 10 2026-07-23
UAL882 - 10 2026-07-10
UAL38 - 10 2026-07-08
UAL945 United Airlines 9 2026-07-21
UAL65 - 9 2026-07-16
UAL416 - 9 2026-06-22
UAL124 United Airlines 9 2026-07-22
UAL971 - 8 2026-07-19
UAL970 - 8 2026-07-18
UAL973 United Airlines 7 2026-07-24
UAL944 United Airlines 7 2026-07-20
UAL923 United Airlines 7 2026-04-25
UAL845 United Airlines 7 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL906 FRA → ORD Jul 26, 19:35 UTCJul 26, 19:45 UTC10m
2026-07-26 UAL906 FRA → ORD Jul 26, 11:15 UTCJul 26, 12:55 UTC1h 40m
2026-07-26 UAL906 FRA → ORD Jul 26, 11:09 UTCJul 26, 19:20 UTC8h 11m
2026-07-26 UAL907 ORD → FRA Jul 26, 00:35 UTCJul 26, 08:10 UTC7h 36m
2026-07-25 UAL423 YYZ → DEN Jul 25, 10:05 UTCJul 25, 20:45 UTC10h 40m
2026-07-24 UAL422 DEN → BOS Jul 24, 22:00 UTCJul 25, 07:20 UTC9h 20m
2026-07-24 UAL422 DEN → BOS Jul 24, 21:53 UTCJul 25, 07:17 UTC9h 24m
2026-07-24 UAL973 BRU → ORD Jul 24, 08:25 UTCJul 24, 16:25 UTC8h 0m
2026-07-23 UAL994 PBI → ORD Jul 23, 23:04 UTCJul 24, 05:14 UTC6h 10m
2026-07-23 UAL994 PBI → ORD Jul 23, 23:05 UTCJul 24, 05:15 UTC6h 10m
2026-07-23 UAL125 ATH → EWR Jul 23, 18:45 UTCJul 23, 18:50 UTC5m
2026-07-23 UAL125 ATH → EWR Jul 23, 08:31 UTCJul 23, 18:27 UTC9h 56m
2026-07-23 UAL125 ATH → EWR Jul 23, 08:55 UTCJul 23, 10:30 UTC1h 35m
2026-07-22 UAL124 EWR → ATH Jul 22, 20:30 UTCJul 23, 05:05 UTC8h 35m
2026-07-22 UAL995 BRU → EWR Jul 22, 10:20 UTCJul 22, 16:45 UTC6h 25m
2026-07-22 UAL995 BRU → EWR Jul 22, 09:29 UTCJul 22, 16:45 UTC7h 16m
2026-07-21 UAL972 ORD → BRU Jul 21, 23:35 UTCJul 22, 00:50 UTC1h 15m
2026-07-21 UAL972 ORD → BRU Jul 21, 23:42 UTCJul 22, 06:44 UTC7h 2m
2026-07-21 UAL945 FRA → ORD Jul 21, 07:20 UTCJul 21, 15:50 UTC8h 30m
2026-07-20 UAL944 ORD → FRA Jul 20, 20:40 UTCJul 21, 04:15 UTC7h 34m
2026-07-20 UAL944 ORD → FRA Jul 20, 20:47 UTCJul 21, 04:08 UTC7h 21m
2026-07-19 UAL971 - Jul 19, 08:15 UTCJul 19, 17:30 UTC9h 15m
2026-07-18 UAL970 ORD → FCO Jul 18, 21:52 UTCJul 19, 05:51 UTC7h 59m
2026-07-18 UAL970 - Jul 18, 21:25 UTCJul 19, 05:55 UTC8h 30m
2026-07-18 UAL945 FRA → ORD Jul 18, 07:15 UTCJul 18, 15:40 UTC8h 25m
2026-07-17 UAL944 ORD → FRA Jul 17, 21:05 UTCJul 18, 04:35 UTC7h 31m
2026-07-17 UAL973 - Jul 17, 08:35 UTCJul 17, 16:34 UTC8h 0m
2026-07-16 UAL994 EWR → BRU Jul 16, 23:29 UTCJul 17, 06:00 UTC6h 30m
2026-07-16 UAL65 LIS → EWR Jul 16, 09:55 UTCJul 16, 17:20 UTC7h 25m
2026-07-16 UAL64 EWR → LIS Jul 16, 01:35 UTCJul 16, 07:30 UTC5h 55m
2026-07-16 UAL64 EWR → LIS Jul 16, 00:56 UTCJul 16, 07:24 UTC6h 28m
2026-07-15 UAL65 LIS → EWR Jul 15, 10:00 UTCJul 15, 17:04 UTC7h 4m
2026-07-15 UAL65 LIS → EWR Jul 15, 10:00 UTCJul 15, 17:05 UTC7h 5m
2026-07-15 UAL64 EWR → LIS Jul 15, 01:42 UTCJul 15, 07:33 UTC5h 51m
2026-07-15 UAL64 EWR → LIS Jul 15, 01:30 UTCJul 15, 07:40 UTC6h 10m
2026-07-14 UAL2303 - Jul 14, 06:40 UTCJul 14, 11:25 UTC4h 45m
2026-07-13 UAL2238 - Jul 13, 21:25 UTCJul 14, 02:00 UTC4h 35m
2026-07-13 UAL65 LIS → EWR Jul 13, 10:00 UTCJul 13, 16:50 UTC6h 50m
2026-07-13 UAL64 EWR → LIS Jul 13, 01:10 UTCJul 13, 07:15 UTC6h 5m
2026-07-12 UAL125 ATH → EWR Jul 12, 07:45 UTCJul 12, 17:26 UTC9h 41m
2026-07-12 UAL125 ATH → EWR Jul 12, 07:45 UTCJul 12, 17:34 UTC9h 49m
2026-07-12 UAL125 - Jul 12, 07:45 UTCJul 12, 10:30 UTC2h 45m
2026-07-11 UAL124 EWR → ATH Jul 11, 20:28 UTCJul 12, 05:11 UTC8h 43m
2026-07-11 UAL124 - Jul 11, 20:35 UTCJul 11, 22:01 UTC1h 25m
2026-07-11 UAL995 - Jul 11, 09:40 UTCJul 11, 10:30 UTC50m
2026-07-11 UAL995 BRU → EWR Jul 11, 09:24 UTCJul 11, 17:03 UTC7h 39m
2026-07-11 UAL972 - Jul 11, 05:05 UTCJul 11, 06:55 UTC1h 50m
2026-07-10 UAL972 - Jul 10, 23:35 UTCJul 11, 01:45 UTC2h 10m
2026-07-10 UAL882 HND → ORD Jul 10, 08:40 UTCJul 10, 19:50 UTC11h 10m
2026-07-09 UAL39 - Jul 9, 19:00 UTCJul 10, 05:45 UTC10h 45m

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 N14001 page for operator, model, and routing details .

Mode-S A0A522 frequently asked

What is Mode-S code A0A522?
A0A522 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14001.
Where is Mode-S A0A522 registered?
Mode-S code A0A522 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 A0A522 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0A522, octal 50122442, decimal 10,528,034.
What flights does A0A522 operate?
Mode-S A0A522 has broadcast 20 distinct callsigns, including UAL995, UAL415, UAL39, UAL125, UAL906.