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 1h ago
Flights observed
116
Distinct callsigns
20
Country
US
Last broadcast
1h ago

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
UAL1884 United Airlines 4 2026-04-15
UAL8100 United Airlines 3 2026-05-25
UAL8107 - 2 2026-04-14
UAL786 United Airlines 2 2026-04-16
UAL611 United Airlines 2 2026-05-19
UAL609 - 2 2026-04-13
UAL587 United Airlines 2 2026-05-29
UAL568 United Airlines 2 2026-05-24
UAL473 - 2 2026-04-13
UAL4205 United Airlines 2 2026-05-13
UAL350 - 2 2026-04-18
UAL329 United Airlines 2 2026-04-16
UAL2783 United Airlines 2 2026-05-27
UAL2670 United Airlines 2 2026-05-22
UAL2605 United Airlines 2 2026-05-28
UAL255 - 2 2026-04-18
UAL2417 United Airlines 2 2026-05-28
UAL2298 United Airlines 2 2026-05-28
UAL217 United Airlines 2 2026-04-15
UAL2154 United Airlines 2 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 UAL1420 MCO → EWR May 29, 21:35 UTCMay 29, 23:55 UTC2h 20m
2026-05-29 UAL587 EWR → MSP May 29, 19:40 UTCMay 29, 20:15 UTC35m
2026-05-29 UAL587 EWR → MSP May 29, 19:45 UTCMay 29, 20:13 UTC28m
2026-05-29 UAL600 EWR → LAS May 29, 16:45 UTCMay 29, 18:00 UTC1h 15m
2026-05-29 UAL1778 EWR → SAT May 29, 14:25 UTCMay 29, 15:25 UTC1h 1m
2026-05-29 UAL1082 LAX → EWR May 29, 11:40 UTCMay 29, 12:40 UTC1h 0m
2026-05-28 UAL2605 SJC → DEN May 28, 23:10 UTCMay 28, 23:40 UTC30m
2026-05-28 UAL2605 SJC → DEN May 28, 23:18 UTCMay 28, 23:42 UTC24m
2026-05-28 UAL2792 IAD → SFO May 28, 20:25 UTCMay 28, 21:30 UTC1h 5m
2026-05-28 UAL2465 IAD → PWM May 28, 17:55 UTCMay 28, 18:45 UTC50m
2026-05-28 UAL2298 SFO → PHX May 28, 13:55 UTCMay 28, 15:55 UTC2h 0m
2026-05-28 UAL2298 SFO → PHX May 28, 14:05 UTCMay 28, 15:48 UTC1h 43m
2026-05-28 UAL2417 SFO → BNA May 28, 00:52 UTCMay 28, 01:56 UTC1h 4m
2026-05-28 UAL2417 SFO → BNA May 28, 00:25 UTCMay 28, 00:35 UTC10m
2026-05-27 UAL2729 PHL → ORD May 27, 18:40 UTCMay 27, 21:20 UTC2h 40m
2026-05-27 UAL2728 VCV → SFO May 27, 14:20 UTCMay 27, 17:20 UTC3h 0m
2026-05-27 UAL2137 ORD → SLC May 27, 11:25 UTCMay 27, 12:15 UTC50m
2026-05-27 UAL2783 SFO → GUM May 27, 01:41 UTCMay 27, 01:43 UTC2m
2026-05-27 UAL2783 SFO → GUM May 27, 01:19 UTCMay 27, 01:39 UTC20m
2026-05-26 UAL1639 OGG → SFO May 26, 22:44 UTCMay 26, 23:29 UTC45m
2026-05-26 UAL1639 OGG → SFO May 26, 19:45 UTCMay 26, 21:29 UTC1h 45m
2026-05-26 UAL517 JFK → LAX May 26, 16:50 UTCMay 26, 18:30 UTC1h 40m
2026-05-26 UAL1464 EWR → FLL May 26, 13:54 UTCMay 26, 15:14 UTC1h 20m
2026-05-26 UAL265 ABQ → ORD May 26, 00:00 UTCMay 26, 00:24 UTC25m
2026-05-25 UAL1803 CHS → EWR May 25, 22:15 UTCMay 25, 22:40 UTC25m
2026-05-25 UAL2764 IAD → EWR May 25, 19:30 UTCMay 25, 20:55 UTC1h 25m
2026-05-25 UAL596 IAD → EWR May 25, 16:30 UTCMay 25, 17:45 UTC1h 15m
2026-05-25 UAL2255 MSO → DEN May 25, 13:40 UTCMay 25, 14:00 UTC20m
2026-05-25 UAL8100 SFO → MCO May 25, 01:55 UTCMay 25, 02:10 UTC15m
2026-05-25 UAL8100 SFO → MCO May 25, 01:55 UTCMay 25, 02:23 UTC28m
2026-05-24 UAL568 IAH → SFO May 24, 20:45 UTCMay 24, 23:46 UTC3h 1m
2026-05-24 UAL568 IAH → SFO May 24, 20:41 UTCMay 24, 23:49 UTC3h 8m
2026-05-24 UAL1874 SFO → IND May 24, 16:10 UTCMay 24, 18:40 UTC2h 30m
2026-05-24 UAL225 ATL → DEN May 24, 12:40 UTCMay 24, 14:25 UTC1h 45m
2026-05-23 UAL1604 SFO → BNA May 23, 22:15 UTCMay 23, 23:40 UTC1h 25m
2026-05-23 UAL1380 IAD → DFW May 23, 18:50 UTCMay 23, 20:45 UTC1h 55m
2026-05-23 UAL652 IAH → SJC May 23, 15:45 UTCMay 23, 17:25 UTC1h 40m
2026-05-23 UAL1306 EWR → CHS May 23, 03:50 UTCMay 23, 14:15 UTC10h 25m
2026-05-23 UAL1602 MCO → DEN May 23, 00:30 UTCMay 23, 02:05 UTC1h 35m
2026-05-22 UAL1439 EWR → SFO May 22, 21:50 UTCMay 22, 22:40 UTC50m
2026-05-22 UAL2118 IAH → BJX May 22, 15:00 UTCMay 22, 19:25 UTC4h 25m
2026-05-22 UAL2670 ORD → CLE May 22, 12:55 UTCMay 22, 13:40 UTC45m
2026-05-22 UAL2670 ORD → CLE May 22, 12:16 UTCMay 22, 13:36 UTC1h 20m
2026-05-22 UAL8100 SFO → MCO May 22, 02:50 UTCMay 22, 04:15 UTC1h 25m
2026-05-21 UAL750 EWR → PBI May 21, 20:00 UTCMay 22, 00:15 UTC4h 15m
2026-05-21 UAL537 IAH → YYC May 21, 14:50 UTCMay 21, 18:35 UTC3h 45m
2026-05-21 UAL1114 SFO → ORD May 21, 10:30 UTCMay 21, 13:05 UTC2h 35m
2026-05-21 UAL1114 SFO → ORD May 21, 10:28 UTCMay 21, 13:05 UTC2h 37m
2026-05-20 UAL1642 EWR → RSW May 20, 18:40 UTCMay 20, 22:45 UTC4h 5m
2026-05-20 UAL1597 LAX → SFO May 20, 12:35 UTCMay 20, 17:20 UTC4h 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 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 1h ago.
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 UAL1884, UAL8100, UAL8107, UAL786, UAL611.