Apparatus

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sensors Mode-S transponder

AB3A0C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N822UA · AIRBUS A-319 · operated by UNITED AIRLINES INC

Hex
AB3A0C
Octal
52635014
Decimal
11,221,516
Country
US
Tail
N822UA
Type
A319
No current signal · last broadcast Jul 26, 21:50 UTC
Flights observed
444
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:50 UTC

Last known position

Most recent position reported by Mode-S AB3A0C.

Country allocation

The ICAO 24-bit address AB3A0C 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
UAL1535 United Airlines 8 2026-07-24
UAL283 - 7 2026-07-01
UAL1439 United Airlines 7 2026-07-25
UAL365 - 6 2026-07-20
UAL285 United Airlines 6 2026-05-17
UAL2279 United Airlines 6 2026-05-15
UAL1394 United Airlines 6 2026-05-15
UAL732 - 5 2026-07-01
UAL340 - 5 2026-07-14
UAL2272 - 5 2026-07-11
UAL1327 United Airlines 5 2026-07-26
UAL773 - 4 2026-07-03
UAL373 United Airlines 4 2026-05-15
UAL2822 United Airlines 4 2026-06-09
UAL2498 United Airlines 4 2026-05-17
UAL2468 United Airlines 4 2026-07-24
UAL2097 - 4 2026-07-15
UAL1639 - 4 2026-07-16
UAL1095 United Airlines 4 2026-05-15
UAL822 - 3 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1022 DEN → SAT Jul 26, 20:05 UTCJul 26, 21:50 UTC1h 45m
2026-07-26 UAL1327 EWR → CMH Jul 26, 15:25 UTCJul 26, 18:05 UTC2h 40m
2026-07-26 UAL2739 SFO → LAX Jul 26, 12:35 UTCJul 26, 13:50 UTC1h 15m
2026-07-25 UAL1460 SFO → DEN Jul 25, 23:40 UTCJul 26, 01:05 UTC1h 25m
2026-07-25 UAL1460 SFO → DEN Jul 25, 23:44 UTCJul 26, 01:03 UTC1h 19m
2026-07-25 UAL1608 MSN → DEN Jul 25, 19:30 UTCJul 25, 21:15 UTC1h 45m
2026-07-25 UAL1197 PBI → EWR Jul 25, 15:10 UTCJul 25, 17:55 UTC2h 45m
2026-07-25 UAL1197 PBI → EWR Jul 25, 15:21 UTCJul 25, 17:40 UTC2h 19m
2026-07-25 UAL1771 SEA → ORD Jul 25, 11:05 UTCJul 25, 13:30 UTC2h 25m
2026-07-25 UAL1439 EWR → SFO Jul 25, 01:30 UTCJul 25, 04:20 UTC2h 50m
2026-07-24 UAL1535 EWR → ORD Jul 24, 23:30 UTCJul 25, 00:15 UTC45m
2026-07-24 UAL1535 EWR → ORD Jul 24, 23:26 UTCJul 25, 00:12 UTC46m
2026-07-24 UAL313 BOI → SFO Jul 24, 20:50 UTCJul 24, 21:40 UTC50m
2026-07-24 UAL2468 TPA → EWR Jul 24, 16:55 UTCJul 24, 19:30 UTC2h 35m
2026-07-24 UAL1705 ORD → EWR Jul 24, 13:50 UTCJul 24, 15:35 UTC1h 45m
2026-07-24 UAL1012 EWR → BOS Jul 24, 10:10 UTCJul 24, 11:50 UTC1h 40m
2026-07-24 UAL1711 SFO → CLE Jul 24, 01:00 UTCJul 24, 04:20 UTC3h 20m
2026-07-23 UAL2289 PDX → SFO Jul 23, 20:25 UTCJul 23, 23:40 UTC3h 15m
2026-07-23 UAL1435 SFO → IAH Jul 23, 15:24 UTCJul 23, 18:53 UTC3h 29m
2026-07-23 UAL1435 SFO → IAH Jul 23, 15:35 UTCJul 23, 19:00 UTC3h 25m
2026-07-23 UAL2035 LAX → SFO Jul 23, 10:25 UTCJul 23, 13:50 UTC3h 25m
2026-07-22 UAL3039 IAD → EDI Jul 22, 20:20 UTCJul 23, 00:40 UTC4h 20m
2026-07-22 UAL3039 IAD → EDI Jul 22, 14:35 UTCJul 22, 19:10 UTC4h 35m
2026-07-22 UAL299 EWR → RSW Jul 22, 11:10 UTCJul 22, 12:05 UTC55m
2026-07-22 UAL299 EWR → RSW Jul 22, 10:22 UTCJul 22, 11:59 UTC1h 37m
2026-07-21 UAL1398 - Jul 21, 23:50 UTCJul 22, 01:30 UTC1h 40m
2026-07-21 UAL1531 ORD → CMH Jul 21, 20:50 UTCJul 21, 21:45 UTC55m
2026-07-21 UAL2749 LAS → SFO Jul 21, 18:00 UTCJul 21, 19:00 UTC1h 0m
2026-07-21 UAL364 BDL → DEN Jul 21, 14:40 UTCJul 21, 16:40 UTC2h 0m
2026-07-20 UAL1398 ORD → ATL Jul 20, 23:50 UTCJul 21, 01:10 UTC1h 20m
2026-07-20 UAL365 ABQ → ORD Jul 20, 18:55 UTCJul 20, 21:25 UTC2h 30m
2026-07-20 UAL215 IAD → SFO Jul 20, 14:25 UTCJul 20, 16:50 UTC2h 25m
2026-07-20 UAL2137 - Jul 20, 11:25 UTCJul 20, 11:55 UTC30m
2026-07-20 UAL1178 SMF → EWR Jul 20, 00:30 UTCJul 20, 01:00 UTC30m
2026-07-19 UAL2467 IAD → ORD Jul 19, 20:45 UTCJul 19, 22:30 UTC1h 45m
2026-07-19 UAL1332 DCA → ORD Jul 19, 17:35 UTCJul 19, 19:05 UTC1h 30m
2026-07-19 UAL1778 EWR → SAT Jul 19, 14:40 UTCJul 19, 16:10 UTC1h 30m
2026-07-19 UAL1568 ORD → SFO Jul 19, 00:55 UTCJul 19, 02:05 UTC1h 10m
2026-07-18 UAL2729 PHL → ORD Jul 18, 19:20 UTCJul 18, 22:30 UTC3h 10m
2026-07-18 UAL2728 VCV → SFO Jul 18, 15:30 UTCJul 18, 18:15 UTC2h 45m
2026-07-18 UAL1517 DFW → ORD Jul 18, 01:20 UTCJul 18, 03:15 UTC1h 56m
2026-07-18 UAL1517 DFW → ORD Jul 18, 01:15 UTCJul 18, 02:58 UTC1h 43m
2026-07-17 UAL793 SFO → ORD Jul 17, 21:20 UTCJul 17, 23:10 UTC1h 50m
2026-07-17 UAL745 ATL → ORD Jul 17, 17:35 UTCJul 17, 19:40 UTC2h 5m
2026-07-17 UAL530 ORD → ATL Jul 17, 14:55 UTCJul 17, 16:15 UTC1h 20m
2026-07-17 UAL1476 - Jul 17, 04:44 UTCJul 17, 05:50 UTC1h 5m
2026-07-17 UAL2207 - Jul 17, 02:30 UTCJul 17, 03:30 UTC1h 0m
2026-07-16 UAL1639 STL → ORD Jul 16, 23:15 UTCJul 17, 00:04 UTC50m
2026-07-16 UAL1639 DEN → STL Jul 16, 19:45 UTCJul 16, 21:35 UTC1h 50m
2026-07-16 UAL1327 ATL → DEN Jul 16, 15:25 UTCJul 16, 18:05 UTC2h 40m

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 N822UA page for operator, model, and routing details .

Mode-S AB3A0C frequently asked

What is Mode-S code AB3A0C?
AB3A0C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N822UA.
Where is Mode-S AB3A0C registered?
Mode-S code AB3A0C 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 AB3A0C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB3A0C, octal 52635014, decimal 11,221,516.
What flights does AB3A0C operate?
Mode-S AB3A0C has broadcast 20 distinct callsigns, including UAL1535, UAL283, UAL1439, UAL365, UAL285.