Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A1EA32

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N222UA · BOEING 777-200 · operated by UNITED AIRLINES INC

Hex
A1EA32
Octal
50365062
Decimal
10,611,250
Country
US
Tail
N222UA
Type
B772
No current signal · last broadcast Jul 26, 20:35 UTC
Flights observed
260
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:35 UTC

Last known position

Most recent position reported by Mode-S A1EA32.

Country allocation

The ICAO 24-bit address A1EA32 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
UAL384 United Airlines 38 2026-07-26
UAL1736 United Airlines 35 2026-07-25
UAL383 United Airlines 24 2026-07-24
UAL1735 United Airlines 24 2026-07-25
UAL1170 United Airlines 17 2026-07-21
UAL1805 - 16 2026-07-16
UAL1806 - 15 2026-07-17
UAL1157 - 8 2026-07-19
UAL300 United Airlines 7 2026-07-23
UAL253 - 7 2026-06-14
UAL252 United Airlines 6 2026-06-14
UAL2168 United Airlines 6 2026-04-22
UAL1731 United Airlines 5 2026-04-22
UAL1720 United Airlines 5 2026-04-22
UAL1169 United Airlines 5 2026-07-21
UAL1158 United Airlines 5 2026-07-21
UAL2391 United Airlines 4 2026-05-16
UAL2358 United Airlines 4 2026-07-04
UAL1947 United Airlines 4 2026-05-18
UAL1758 United Airlines 4 2026-04-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL384 DEN → HNL Jul 26, 18:25 UTCJul 26, 20:35 UTC2h 10m
2026-07-25 UAL1735 LAS → EWR Jul 25, 09:35 UTCJul 25, 11:55 UTC2h 20m
2026-07-25 UAL1735 LAS → EWR Jul 25, 06:15 UTCJul 25, 12:00 UTC5h 45m
2026-07-25 UAL1736 DEN → OGG Jul 25, 00:45 UTCJul 25, 00:55 UTC10m
2026-07-24 UAL1736 DEN → OGG Jul 24, 18:25 UTCJul 24, 20:30 UTC2h 5m
2026-07-24 UAL383 HNL → DEN Jul 24, 06:30 UTCJul 24, 12:20 UTC5h 50m
2026-07-23 UAL300 SFO → HNL Jul 23, 21:22 UTCJul 24, 02:14 UTC4h 52m
2026-07-23 UAL300 SFO → HNL Jul 23, 21:20 UTCJul 24, 02:15 UTC4h 55m
2026-07-23 UAL2610 IAD → PDX Jul 23, 15:35 UTCJul 23, 19:20 UTC3h 45m
2026-07-22 UAL2480 BOS → SFO Jul 22, 22:25 UTCJul 23, 01:55 UTC3h 30m
2026-07-22 UAL2480 BOS → SFO Jul 22, 22:38 UTCJul 23, 01:37 UTC2h 59m
2026-07-22 UAL1818 FLL → EWR Jul 22, 02:25 UTCJul 22, 02:40 UTC15m
2026-07-22 UAL1818 FLL → EWR Jul 22, 02:10 UTCJul 22, 06:22 UTC4h 12m
2026-07-21 UAL1158 LAX → HNL Jul 21, 17:20 UTCJul 21, 22:40 UTC5h 20m
2026-07-21 UAL1169 BDL → ORD Jul 21, 07:55 UTCJul 21, 12:30 UTC4h 35m
2026-07-21 UAL1170 LAX → HNL Jul 21, 05:10 UTCJul 21, 05:25 UTC15m
2026-07-21 UAL1170 LAX → HNL Jul 21, 00:15 UTCJul 21, 00:45 UTC30m
2026-07-19 UAL1157 - Jul 19, 23:25 UTCJul 20, 04:20 UTC4h 55m
2026-07-18 UAL384 - Jul 18, 18:20 UTCJul 19, 00:55 UTC6h 35m
2026-07-18 UAL383 HNL → DEN Jul 18, 06:10 UTCJul 18, 12:10 UTC6h 0m
2026-07-17 UAL384 - Jul 17, 18:50 UTCJul 18, 01:30 UTC6h 40m
2026-07-17 UAL1806 - Jul 17, 08:04 UTCJul 17, 14:10 UTC6h 5m
2026-07-16 UAL1805 - Jul 16, 22:40 UTCJul 17, 05:30 UTC6h 50m
2026-07-16 UAL1806 - Jul 16, 08:05 UTCJul 16, 14:10 UTC6h 5m
2026-07-15 UAL1805 - Jul 15, 22:30 UTCJul 16, 05:10 UTC6h 40m
2026-07-15 UAL1735 - Jul 15, 10:00 UTCJul 15, 12:05 UTC2h 5m
2026-07-14 UAL1736 DEN → OGG Jul 14, 18:23 UTCJul 15, 00:52 UTC6h 29m
2026-07-14 UAL1736 - Jul 14, 18:20 UTCJul 14, 20:40 UTC2h 20m
2026-07-14 UAL383 - Jul 14, 09:40 UTCJul 14, 12:00 UTC2h 20m
2026-07-14 UAL383 - Jul 14, 06:00 UTCJul 14, 06:15 UTC15m
2026-07-14 UAL384 - Jul 14, 00:40 UTCJul 14, 00:55 UTC15m
2026-07-13 UAL384 - Jul 13, 18:25 UTCJul 13, 20:35 UTC2h 10m
2026-07-13 UAL1735 OGG → DEN Jul 13, 06:15 UTCJul 13, 12:08 UTC5h 53m
2026-07-13 UAL1735 OGG → DEN Jul 13, 06:15 UTCJul 13, 12:02 UTC5h 47m
2026-07-12 UAL1736 - Jul 12, 18:20 UTCJul 12, 20:35 UTC2h 15m
2026-07-11 UAL1735 - Jul 11, 09:45 UTCJul 11, 12:00 UTC2h 15m
2026-07-10 UAL1736 - Jul 10, 18:15 UTCJul 10, 20:40 UTC2h 25m
2026-07-10 UAL1735 - Jul 10, 09:50 UTCJul 10, 11:50 UTC2h 0m
2026-07-09 UAL1736 DEN → OGG Jul 9, 18:23 UTCJul 10, 00:42 UTC6h 19m
2026-07-09 UAL1736 - Jul 9, 18:15 UTCJul 9, 20:20 UTC2h 5m
2026-07-09 UAL1735 - Jul 9, 09:55 UTCJul 9, 11:55 UTC2h 0m
2026-07-09 UAL1735 OGG → DEN Jul 9, 06:15 UTCJul 9, 11:49 UTC5h 34m
2026-07-08 UAL1736 DEN → OGG Jul 8, 18:23 UTCJul 9, 00:45 UTC6h 22m
2026-07-08 UAL1736 - Jul 8, 18:10 UTCJul 8, 20:25 UTC2h 15m
2026-07-08 UAL1735 - Jul 8, 09:50 UTCJul 8, 11:50 UTC2h 0m
2026-07-08 UAL1736 - Jul 8, 00:55 UTCJul 8, 01:05 UTC10m
2026-07-07 UAL1736 DEN → OGG Jul 7, 18:23 UTCJul 8, 01:06 UTC6h 43m
2026-07-07 UAL1736 - Jul 7, 18:40 UTCJul 7, 21:10 UTC2h 30m
2026-07-07 UAL1735 OGG → DEN Jul 7, 06:15 UTCJul 7, 11:56 UTC5h 41m
2026-07-06 UAL1736 - Jul 6, 18:50 UTCJul 6, 21:20 UTC2h 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 N222UA page for operator, model, and routing details .

Mode-S A1EA32 frequently asked

What is Mode-S code A1EA32?
A1EA32 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N222UA.
Where is Mode-S A1EA32 registered?
Mode-S code A1EA32 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 A1EA32 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1EA32, octal 50365062, decimal 10,611,250.
What flights does A1EA32 operate?
Mode-S A1EA32 has broadcast 20 distinct callsigns, including UAL384, UAL1736, UAL383, UAL1735, UAL1170.