Apparatus

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sensors Mode-S transponder

AB417A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N824UA · AIRBUS A-319 · operated by UNITED AIRLINES INC

Hex
AB417A
Octal
52640572
Decimal
11,223,418
Country
US
Tail
N824UA
Type
A319
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
374
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S AB417A.

Country allocation

The ICAO 24-bit address AB417A 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
UAL2729 United Airlines 9 2026-07-24
UAL2728 United Airlines 6 2026-07-24
UAL1778 - 5 2026-07-12
UAL1687 United Airlines 5 2026-07-23
UAL1028 United Airlines 5 2026-07-22
UAL1884 United Airlines 4 2026-04-15
UAL1746 - 4 2026-06-24
UAL8100 United Airlines 3 2026-05-25
UAL786 - 3 2026-07-10
UAL750 - 3 2026-06-29
UAL657 United Airlines 3 2026-06-10
UAL600 - 3 2026-07-12
UAL428 - 3 2026-07-23
UAL412 - 3 2026-06-19
UAL293 United Airlines 3 2026-07-26
UAL2818 - 3 2026-07-18
UAL2783 United Airlines 3 2026-06-13
UAL2770 - 3 2026-07-09
UAL2680 - 3 2026-07-23
UAL255 United Airlines 3 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL293 EWR → DFW Jul 26, 22:20 UTCJul 26, 22:30 UTC10m
2026-07-26 UAL1831 RNO → SFO Jul 26, 18:55 UTCJul 26, 20:20 UTC1h 25m
2026-07-26 UAL2684 PHL → ORD Jul 26, 15:50 UTCJul 26, 17:15 UTC1h 25m
2026-07-26 UAL1061 SEA → SFO Jul 26, 12:43 UTCJul 26, 13:59 UTC1h 16m
2026-07-26 UAL1061 SEA → SFO Jul 26, 12:35 UTCJul 26, 14:10 UTC1h 35m
2026-07-25 UAL1627 LAX → EWR Jul 25, 23:40 UTCJul 26, 02:15 UTC2h 35m
2026-07-25 UAL1627 LAX → EWR Jul 25, 23:34 UTCJul 26, 02:09 UTC2h 35m
2026-07-25 UAL1268 LGA → IAH Jul 25, 21:05 UTCJul 25, 22:15 UTC1h 10m
2026-07-25 UAL752 LAX → IAH Jul 25, 18:10 UTCJul 25, 19:30 UTC1h 20m
2026-07-24 UAL2729 PHL → ORD Jul 24, 19:15 UTCJul 24, 22:05 UTC2h 50m
2026-07-24 UAL2728 VCV → SFO Jul 24, 15:20 UTCJul 24, 18:10 UTC2h 50m
2026-07-24 UAL2145 MFR → SFO Jul 24, 11:15 UTCJul 24, 12:25 UTC1h 10m
2026-07-23 UAL2496 PDX → SFO Jul 23, 23:35 UTCJul 24, 00:30 UTC55m
2026-07-23 UAL2496 PDX → SFO Jul 23, 23:33 UTCJul 24, 00:42 UTC1h 9m
2026-07-23 UAL2680 - Jul 23, 20:35 UTCJul 23, 21:15 UTC40m
2026-07-23 UAL1687 MSY → SFO Jul 23, 17:10 UTCJul 23, 19:05 UTC1h 55m
2026-07-23 UAL1687 MSY → SFO Jul 23, 17:12 UTCJul 23, 18:54 UTC1h 42m
2026-07-23 UAL428 - Jul 23, 13:00 UTCJul 23, 14:45 UTC1h 45m
2026-07-22 UAL1028 IAH → MEX Jul 22, 23:35 UTCJul 22, 23:50 UTC15m
2026-07-22 UAL1028 IAH → MEX Jul 22, 21:50 UTCJul 22, 23:00 UTC1h 10m
2026-07-22 UAL1028 IAH → MEX Jul 22, 21:48 UTCJul 22, 23:45 UTC1h 57m
2026-07-22 UAL2460 SAT → IAH Jul 22, 16:00 UTCJul 22, 18:10 UTC2h 10m
2026-07-21 UAL283 DFW → EWR Jul 21, 15:55 UTCJul 21, 19:05 UTC3h 10m
2026-07-21 UAL538 EWR → BNA Jul 21, 12:19 UTCJul 21, 14:03 UTC1h 44m
2026-07-21 UAL538 EWR → BNA Jul 21, 12:10 UTCJul 21, 14:10 UTC2h 0m
2026-07-21 UAL737 SFO → ABQ Jul 21, 02:30 UTCJul 21, 04:30 UTC2h 0m
2026-07-21 UAL1846 SBP → SFO Jul 21, 00:35 UTCJul 21, 01:15 UTC40m
2026-07-21 UAL1846 SBP → SFO Jul 21, 00:17 UTCJul 21, 01:08 UTC51m
2026-07-20 UAL1846 DEN → SBP Jul 20, 17:55 UTCJul 20, 20:00 UTC2h 5m
2026-07-20 UAL1081 - Jul 20, 14:20 UTCJul 20, 15:55 UTC1h 35m
2026-07-19 UAL1282 EWR → RSW Jul 19, 23:55 UTCJul 20, 01:25 UTC1h 30m
2026-07-19 UAL1510 - Jul 19, 19:40 UTCJul 19, 22:00 UTC2h 20m
2026-07-19 UAL1479 - Jul 19, 16:15 UTCJul 19, 18:30 UTC2h 15m
2026-07-19 UAL1049 ALW → DEN Jul 19, 12:30 UTCJul 19, 14:10 UTC1h 40m
2026-07-19 UAL1913 - Jul 19, 01:50 UTCJul 19, 03:35 UTC1h 45m
2026-07-18 UAL259 SBP → DEN Jul 18, 19:55 UTCJul 18, 22:05 UTC2h 10m
2026-07-18 UAL487 PHX → SFO Jul 18, 18:05 UTCJul 18, 18:50 UTC45m
2026-07-18 UAL2818 PDX → SFO Jul 18, 14:10 UTCJul 18, 15:45 UTC1h 35m
2026-07-18 UAL2413 - Jul 18, 05:00 UTCJul 18, 06:10 UTC1h 10m
2026-07-17 UAL1863 - Jul 17, 23:25 UTCJul 18, 03:55 UTC4h 31m
2026-07-17 UAL1642 - Jul 17, 18:05 UTCJul 17, 22:05 UTC4h 0m
2026-07-17 UAL2861 - Jul 17, 01:55 UTCJul 17, 06:15 UTC4h 20m
2026-07-16 UAL1095 - Jul 16, 18:10 UTCJul 16, 22:25 UTC4h 15m
2026-07-16 UAL2818 PDX → SFO Jul 16, 15:14 UTCJul 16, 16:55 UTC1h 40m
2026-07-16 UAL2818 PDX → SFO Jul 16, 15:22 UTCJul 16, 16:46 UTC1h 24m
2026-07-16 UAL2413 SFO → PDX Jul 16, 04:20 UTCJul 16, 05:30 UTC1h 10m
2026-07-15 UAL737 SEA → SFO Jul 15, 21:35 UTCJul 15, 23:25 UTC1h 50m
2026-07-15 UAL2192 SFO → SEA Jul 15, 18:50 UTCJul 15, 20:15 UTC1h 25m
2026-07-15 UAL1293 BNA → SFO Jul 15, 12:15 UTCJul 15, 16:10 UTC3h 55m
2026-07-14 UAL2784 - Jul 14, 23:50 UTCJul 15, 00:45 UTC55m

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 N824UA page for operator, model, and routing details .

Mode-S AB417A frequently asked

What is Mode-S code AB417A?
AB417A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N824UA.
Where is Mode-S AB417A registered?
Mode-S code AB417A 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 AB417A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB417A, octal 52640572, decimal 11,223,418.
What flights does AB417A operate?
Mode-S AB417A has broadcast 20 distinct callsigns, including UAL2729, UAL2728, UAL1778, UAL1687, UAL1028.