Apparatus

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sensors Mode-S transponder

AC4E85

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N892UA · AIRBUS A-319 · operated by UMB BANK NA TRUSTEE

Hex
AC4E85
Octal
53047205
Decimal
11,292,293
Country
US
Tail
N892UA
Type
A319
Broadcasting now · callsign UAL1244 · 13,375 ft
Flights observed
470
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:50 UTC

Current position

AC4E85 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC4E85 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
UAL1990 - 5 2026-07-19
UAL1293 United Airlines 5 2026-05-22
UAL732 - 4 2026-06-23
UAL657 United Airlines 4 2026-07-26
UAL581 United Airlines 4 2026-05-10
UAL570 United Airlines 4 2026-06-28
UAL546 - 4 2026-06-28
UAL425 - 4 2026-07-04
UAL283 - 4 2026-06-24
UAL2762 United Airlines 4 2026-07-19
UAL2454 - 4 2026-06-30
UAL1846 - 4 2026-06-20
UAL1180 United Airlines 4 2026-04-21
UAL1090 United Airlines 4 2026-07-22
UAL1081 - 4 2026-06-22
UAL738 United Airlines 3 2026-07-25
UAL697 United Airlines 3 2026-07-24
UAL676 - 3 2026-06-28
UAL635 United Airlines 3 2026-05-21
UAL622 - 3 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1307 EWR → BUF Jul 26, 19:05 UTCJul 26, 20:45 UTC1h 40m
2026-07-26 UAL1365 DFW → EWR Jul 26, 16:15 UTCJul 26, 17:45 UTC1h 30m
2026-07-26 UAL1407 LAS → SFO Jul 26, 13:30 UTCJul 26, 14:45 UTC1h 15m
2026-07-26 UAL657 CHS → EWR Jul 26, 02:30 UTCJul 26, 04:40 UTC2h 10m
2026-07-26 UAL657 CHS → EWR Jul 26, 02:15 UTCJul 26, 04:35 UTC2h 20m
2026-07-25 UAL2150 HNL → DEN Jul 25, 19:40 UTCJul 25, 22:05 UTC2h 25m
2026-07-25 UAL2472 IAH → DCA Jul 25, 14:20 UTCJul 25, 17:50 UTC3h 30m
2026-07-25 UAL738 CMH → DEN Jul 25, 01:00 UTCJul 25, 04:50 UTC3h 50m
2026-07-25 UAL738 CMH → DEN Jul 25, 01:08 UTCJul 25, 04:49 UTC3h 41m
2026-07-24 UAL738 CMH → DEN Jul 24, 21:15 UTCJul 24, 23:10 UTC1h 55m
2026-07-24 UAL2364 LGA → ORD Jul 24, 18:05 UTCJul 24, 20:00 UTC1h 55m
2026-07-24 UAL697 DCA → IAH Jul 24, 12:30 UTCJul 24, 15:05 UTC2h 35m
2026-07-23 UAL2296 SFO → IAH Jul 23, 22:15 UTCJul 24, 00:50 UTC2h 35m
2026-07-23 UAL1469 DFW → IAH Jul 23, 18:40 UTCJul 23, 20:30 UTC1h 50m
2026-07-23 UAL2281 CVG → IAH Jul 23, 15:05 UTCJul 23, 16:50 UTC1h 45m
2026-07-23 UAL2670 ORD → CLE Jul 23, 12:15 UTCJul 23, 12:55 UTC40m
2026-07-23 UAL1183 FLL → EWR Jul 23, 03:10 UTCJul 23, 03:50 UTC40m
2026-07-23 UAL1183 FLL → EWR Jul 23, 03:06 UTCJul 23, 03:45 UTC39m
2026-07-22 UAL1025 MEX → IAH Jul 22, 22:55 UTCJul 23, 00:40 UTC1h 45m
2026-07-22 UAL1090 IAH → MEX Jul 22, 19:30 UTCJul 22, 21:10 UTC1h 40m
2026-07-22 UAL1090 IAH → MEX Jul 22, 19:37 UTCJul 22, 21:09 UTC1h 32m
2026-07-22 UAL2190 - Jul 22, 15:35 UTCJul 22, 18:10 UTC2h 35m
2026-07-22 UAL2190 DCA → IAH Jul 22, 15:33 UTCJul 22, 18:09 UTC2h 36m
2026-07-22 UAL482 - Jul 22, 12:30 UTCJul 22, 13:50 UTC1h 20m
2026-07-22 UAL785 ORD → PWM Jul 22, 02:55 UTCJul 22, 04:50 UTC1h 55m
2026-07-21 UAL3927 SFO → IAD Jul 21, 19:15 UTCJul 21, 21:00 UTC1h 45m
2026-07-21 UAL1712 - Jul 21, 11:20 UTCJul 21, 14:15 UTC2h 55m
2026-07-21 UAL1439 EWR → SFO Jul 21, 01:35 UTCJul 21, 04:30 UTC2h 55m
2026-07-20 UAL1535 - Jul 20, 23:25 UTCJul 21, 00:10 UTC44m
2026-07-20 UAL313 BOI → SFO Jul 20, 21:15 UTCJul 20, 22:05 UTC50m
2026-07-20 UAL2468 - Jul 20, 17:40 UTCJul 20, 20:05 UTC2h 25m
2026-07-20 UAL2690 LAS → IAH Jul 20, 14:30 UTCJul 20, 16:30 UTC2h 0m
2026-07-19 UAL2784 - Jul 19, 23:25 UTCJul 20, 00:25 UTC1h 0m
2026-07-19 UAL2824 - Jul 19, 19:25 UTCJul 19, 21:25 UTC2h 0m
2026-07-19 UAL2824 - Jul 19, 19:05 UTCJul 19, 19:20 UTC15m
2026-07-19 UAL490 ORD → SAT Jul 19, 15:45 UTCJul 19, 17:50 UTC2h 5m
2026-07-19 UAL786 - Jul 19, 12:30 UTCJul 19, 13:55 UTC1h 25m
2026-07-19 UAL2762 SFO → FTW Jul 19, 05:20 UTCJul 19, 06:35 UTC1h 15m
2026-07-19 UAL2762 SFO → FTW Jul 19, 05:18 UTCJul 19, 06:35 UTC1h 17m
2026-07-19 UAL1990 AUS → ORD Jul 19, 00:50 UTCJul 19, 03:05 UTC2h 15m
2026-07-19 UAL1990 AUS → ORD Jul 19, 00:45 UTCJul 19, 03:03 UTC2h 18m
2026-07-18 UAL622 - Jul 18, 20:15 UTCJul 18, 22:20 UTC2h 5m
2026-07-18 UAL1448 - Jul 18, 16:20 UTCJul 18, 18:30 UTC2h 10m
2026-07-18 UAL1890 - Jul 18, 13:50 UTCJul 18, 14:55 UTC1h 5m
2026-07-18 UAL1890 EWR → RDU Jul 18, 13:19 UTCJul 18, 14:53 UTC1h 34m
2026-07-18 UAL402 DFW → EWR Jul 18, 00:29 UTCJul 18, 03:35 UTC3h 6m
2026-07-17 UAL2330 PHX → EWR Jul 17, 17:22 UTCJul 17, 20:07 UTC2h 45m
2026-07-17 UAL2330 PHX → EWR Jul 17, 17:09 UTCJul 17, 20:10 UTC3h 0m
2026-07-17 UAL1705 ATL → EWR Jul 17, 13:45 UTCJul 17, 15:29 UTC1h 45m
2026-07-17 UAL1012 EWR → ATL Jul 17, 10:19 UTCJul 17, 12:00 UTC1h 41m

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 N892UA page for operator, model, and routing details .

Mode-S AC4E85 frequently asked

What is Mode-S code AC4E85?
AC4E85 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N892UA.
Where is Mode-S AC4E85 registered?
Mode-S code AC4E85 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 AC4E85 broadcasting right now?
Yes. Mode-S AC4E85 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC4E85, octal 53047205, decimal 11,292,293.
What flights does AC4E85 operate?
Mode-S AC4E85 has broadcast 20 distinct callsigns, including UAL1990, UAL1293, UAL732, UAL657, UAL581.