Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB050F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N809UA · AIRBUS A-319 · operated by UNITED AIRLINES INC

Hex
AB050F
Octal
52602417
Decimal
11,207,951
Country
US
Tail
N809UA
Type
A319
No current signal · last broadcast 7d ago
Flights observed
369
Distinct callsigns
20
Country
US
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S AB050F.

Country allocation

The ICAO 24-bit address AB050F 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
UAL822 United Airlines 9 2026-06-11
UAL412 United Airlines 6 2026-06-11
UAL581 United Airlines 4 2026-06-15
UAL2437 United Airlines 4 2026-06-07
UAL1639 - 4 2026-06-25
UAL1541 - 4 2026-06-23
UAL1381 United Airlines 4 2026-05-17
UAL1282 United Airlines 4 2026-06-17
UAL1236 United Airlines 4 2026-05-16
UAL1067 United Airlines 4 2026-06-13
UAL1025 United Airlines 4 2026-05-19
UAL730 United Airlines 3 2026-04-15
UAL429 United Airlines 3 2026-05-20
UAL3911 - 3 2026-07-01
UAL374 United Airlines 3 2026-05-17
UAL2783 United Airlines 3 2026-06-14
UAL2082 United Airlines 3 2026-05-13
UAL1846 - 3 2026-06-17
UAL1641 United Airlines 3 2026-06-08
UAL1593 United Airlines 3 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-06 UAL3862 HKG → SFO Jul 6, 15:30 UTCJul 6, 17:10 UTC1h 40m
2026-07-06 UAL3862 HKG → SFO Jul 6, 15:23 UTCJul 6, 17:18 UTC1h 55m
2026-07-01 UAL3911 COS → DEN Jul 1, 02:24 UTCJul 1, 02:35 UTC11m
2026-07-01 UAL3911 - Jul 1, 02:00 UTCJul 1, 02:05 UTC5m
2026-06-30 UAL3911 - Jun 30, 21:05 UTCJul 1, 00:40 UTC3h 35m
2026-06-28 UAL1687 - Jun 28, 17:19 UTCJun 28, 19:09 UTC1h 50m
2026-06-28 UAL1687 IAH → IND Jun 28, 17:12 UTCJun 28, 19:07 UTC1h 55m
2026-06-28 UAL697 - Jun 28, 12:50 UTCJun 28, 15:40 UTC2h 50m
2026-06-28 UAL3900 SJC → DEN Jun 28, 09:55 UTCJun 28, 11:35 UTC1h 40m
2026-06-27 UAL364 ATL → ORD Jun 27, 14:14 UTCJun 27, 16:04 UTC1h 50m
2026-06-27 UAL1287 - Jun 27, 00:29 UTCJun 27, 02:14 UTC1h 45m
2026-06-26 UAL555 ATL → EWR Jun 26, 20:50 UTCJun 26, 22:40 UTC1h 50m
2026-06-26 UAL555 ATL → EWR Jun 26, 20:50 UTCJun 26, 22:35 UTC1h 45m
2026-06-26 UAL1307 - Jun 26, 17:15 UTCJun 26, 19:00 UTC1h 45m
2026-06-26 UAL1365 - Jun 26, 14:25 UTCJun 26, 15:45 UTC1h 20m
2026-06-26 UAL1407 EWR → MYR Jun 26, 11:30 UTCJun 26, 12:50 UTC1h 20m
2026-06-26 UAL1407 - Jun 26, 11:30 UTCJun 26, 12:44 UTC1h 15m
2026-06-26 UAL1439 DFW → EWR Jun 26, 01:39 UTCJun 26, 04:34 UTC2h 55m
2026-06-25 UAL1535 - Jun 25, 23:30 UTCJun 26, 00:15 UTC45m
2026-06-25 UAL313 - Jun 25, 20:59 UTCJun 25, 21:50 UTC50m
2026-06-25 UAL2468 TPA → EWR Jun 25, 17:05 UTCJun 25, 19:44 UTC2h 40m
2026-06-25 UAL2690 - Jun 25, 14:04 UTCJun 25, 15:59 UTC1h 55m
2026-06-25 UAL2063 ORD → BNA Jun 25, 06:52 UTCJun 25, 07:35 UTC43m
2026-06-25 UAL2063 ORD → BNA Jun 25, 06:40 UTCJun 25, 07:39 UTC1h 0m
2026-06-25 UAL1639 - Jun 25, 01:50 UTCJun 25, 02:45 UTC55m
2026-06-24 UAL1639 - Jun 24, 20:09 UTCJun 24, 21:44 UTC1h 35m
2026-06-24 UAL1327 - Jun 24, 16:14 UTCJun 24, 18:55 UTC2h 40m
2026-06-24 UAL1030 - Jun 24, 12:34 UTCJun 24, 14:09 UTC1h 35m
2026-06-24 UAL1871 - Jun 24, 00:44 UTCJun 24, 01:24 UTC40m
2026-06-23 UAL1899 DEN → AUS Jun 23, 21:54 UTCJun 23, 23:39 UTC1h 45m
2026-06-23 UAL1541 DEN → MSY Jun 23, 18:12 UTCJun 23, 20:19 UTC2h 7m
2026-06-23 UAL1541 - Jun 23, 18:14 UTCJun 23, 20:19 UTC2h 5m
2026-06-23 UAL456 DEN → AUS Jun 23, 14:15 UTCJun 23, 15:59 UTC1h 45m
2026-06-22 UAL314 - Jun 22, 19:44 UTCJun 22, 22:59 UTC3h 15m
2026-06-22 UAL1540 - Jun 22, 15:54 UTCJun 22, 18:15 UTC2h 20m
2026-06-20 UAL1376 MSY → DEN Jun 20, 13:34 UTCJun 20, 16:29 UTC2h 55m
2026-06-20 UAL1541 DEN → MSY Jun 20, 00:24 UTCJun 20, 02:40 UTC2h 15m
2026-06-19 UAL1510 IAD → PHX Jun 19, 19:39 UTCJun 19, 22:09 UTC2h 30m
2026-06-19 UAL1479 IAD → EWR Jun 19, 16:06 UTCJun 19, 17:54 UTC1h 48m
2026-06-19 UAL1479 IAD → EWR Jun 19, 15:59 UTCJun 19, 17:55 UTC1h 55m
2026-06-19 UAL1378 ATL → DEN Jun 19, 11:45 UTCJun 19, 14:44 UTC3h 0m
2026-06-19 UAL1305 DEN → ATL Jun 19, 01:19 UTCJun 19, 03:39 UTC2h 20m
2026-06-18 UAL2187 BUR → DEN Jun 18, 21:40 UTCJun 18, 23:30 UTC1h 50m
2026-06-18 UAL2115 SFO → BUR Jun 18, 19:20 UTCJun 18, 20:15 UTC55m
2026-06-18 UAL2115 EWR → SFO Jun 18, 19:06 UTCJun 18, 20:14 UTC1h 8m
2026-06-17 UAL1846 SBP → SFO Jun 17, 22:25 UTCJun 17, 23:05 UTC40m
2026-06-17 UAL1846 SBP → SFO Jun 17, 21:32 UTCJun 17, 23:02 UTC1h 30m
2026-06-17 UAL1846 DEN → SBP Jun 17, 18:00 UTCJun 17, 20:10 UTC2h 10m
2026-06-17 UAL1081 EWR → MIA Jun 17, 14:40 UTCJun 17, 16:25 UTC1h 45m
2026-06-17 UAL1282 EWR → RSW Jun 17, 00:00 UTCJun 17, 01:25 UTC1h 25m

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 N809UA page for operator, model, and routing details .

Mode-S AB050F frequently asked

What is Mode-S code AB050F?
AB050F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N809UA.
Where is Mode-S AB050F registered?
Mode-S code AB050F 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 AB050F broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB050F, octal 52602417, decimal 11,207,951.
What flights does AB050F operate?
Mode-S AB050F has broadcast 20 distinct callsigns, including UAL822, UAL412, UAL581, UAL2437, UAL1639.