Apparatus

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sensors Mode-S transponder

ABB7F7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N854UA · AIRBUS A-319 · operated by UMB BANK NA TRUSTEE

Hex
ABB7F7
Octal
52733767
Decimal
11,253,751
Country
US
Tail
N854UA
Type
A319
No current signal · last broadcast Jul 26, 20:40 UTC
Flights observed
404
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:40 UTC

Last known position

Most recent position reported by Mode-S ABB7F7.

Country allocation

The ICAO 24-bit address ABB7F7 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
UAL543 - 6 2026-07-08
UAL2364 - 6 2026-07-15
UAL2097 - 6 2026-07-09
UAL1836 United Airlines 6 2026-07-22
UAL1639 - 6 2026-07-10
UAL738 - 5 2026-07-16
UAL696 United Airlines 5 2026-07-22
UAL1453 United Airlines 5 2026-07-23
UAL1090 - 5 2026-07-16
UAL697 - 4 2026-07-15
UAL616 - 4 2026-06-28
UAL499 - 4 2026-07-04
UAL412 - 4 2026-07-09
UAL2317 United Airlines 4 2026-06-08
UAL2233 - 4 2026-07-17
UAL2154 United Airlines 4 2026-07-23
UAL1334 - 4 2026-07-02
UAL793 - 3 2026-07-11
UAL570 - 3 2026-07-19
UAL546 - 3 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1469 DFW → IAH Jul 26, 18:45 UTCJul 26, 20:40 UTC1h 55m
2026-07-26 UAL2281 CVG → IAH Jul 26, 15:05 UTCJul 26, 17:15 UTC2h 10m
2026-07-26 UAL2281 CVG → IAH Jul 26, 15:07 UTCJul 26, 16:51 UTC1h 44m
2026-07-26 UAL1085 MEX → IAH Jul 26, 10:55 UTCJul 26, 12:50 UTC1h 55m
2026-07-26 UAL429 IAH → MEX Jul 26, 03:00 UTCJul 26, 04:45 UTC1h 45m
2026-07-26 UAL429 IAH → MEX Jul 26, 03:06 UTCJul 26, 04:39 UTC1h 33m
2026-07-25 UAL750 EWR → PBI Jul 25, 20:10 UTCJul 25, 23:45 UTC3h 35m
2026-07-25 UAL537 IAH → YYC Jul 25, 15:00 UTCJul 25, 18:45 UTC3h 45m
2026-07-25 UAL2670 ORD → CLE Jul 25, 12:15 UTCJul 25, 12:55 UTC40m
2026-07-25 UAL1949 ORD → DCA Jul 25, 01:15 UTCJul 25, 02:10 UTC55m
2026-07-25 UAL1949 ORD → DCA Jul 25, 01:17 UTCJul 25, 02:05 UTC48m
2026-07-24 UAL2407 TPA → EWR Jul 24, 21:00 UTCJul 24, 23:25 UTC2h 25m
2026-07-24 UAL2196 AUS → IAH Jul 24, 17:20 UTCJul 24, 19:40 UTC2h 20m
2026-07-24 UAL2460 SAT → IAH Jul 24, 13:10 UTCJul 24, 15:25 UTC2h 15m
2026-07-24 UAL648 EWR → SFO Jul 24, 01:05 UTCJul 24, 04:05 UTC3h 0m
2026-07-24 UAL648 EWR → SFO Jul 24, 00:28 UTCJul 24, 04:03 UTC3h 35m
2026-07-23 UAL1453 SJD → IAH Jul 23, 22:25 UTCJul 23, 23:15 UTC50m
2026-07-23 UAL2154 ORD → TPA Jul 23, 17:30 UTCJul 23, 19:25 UTC1h 55m
2026-07-23 UAL1081 - Jul 23, 14:15 UTCJul 23, 16:00 UTC1h 45m
2026-07-23 UAL1282 EWR → RSW Jul 23, 00:35 UTCJul 23, 02:00 UTC1h 25m
2026-07-22 UAL696 RIC → DEN Jul 22, 20:25 UTCJul 22, 23:05 UTC2h 40m
2026-07-22 UAL696 RIC → DEN Jul 22, 20:32 UTCJul 22, 23:13 UTC2h 41m
2026-07-22 UAL1836 SEA → SFO Jul 22, 17:35 UTCJul 22, 19:20 UTC1h 45m
2026-07-22 UAL2459 STL → DEN Jul 22, 14:30 UTCJul 22, 16:20 UTC1h 50m
2026-07-21 UAL3885 SFO → VCV Jul 21, 22:25 UTCJul 21, 23:50 UTC1h 25m
2026-07-21 UAL3885 SFO → VCV Jul 21, 21:35 UTCJul 21, 23:45 UTC2h 10m
2026-07-21 UAL2669 SAT → SFO Jul 21, 14:05 UTCJul 21, 15:55 UTC1h 50m
2026-07-21 UAL1525 - Jul 21, 10:20 UTCJul 21, 11:35 UTC1h 15m
2026-07-21 UAL1233 ORD → SFO Jul 21, 02:45 UTCJul 21, 03:45 UTC1h 0m
2026-07-20 UAL1261 EWR → IAH Jul 20, 19:50 UTCJul 20, 23:30 UTC3h 40m
2026-07-20 UAL591 SEA → EWR Jul 20, 14:40 UTCJul 20, 17:50 UTC3h 10m
2026-07-20 UAL2053 SFO → PDX Jul 20, 11:30 UTCJul 20, 13:15 UTC1h 45m
2026-07-20 UAL1287 - Jul 20, 01:40 UTCJul 20, 03:25 UTC1h 45m
2026-07-19 UAL546 SAV → EWR Jul 19, 21:05 UTCJul 19, 22:40 UTC1h 35m
2026-07-19 UAL570 EWR → SAV Jul 19, 17:05 UTCJul 19, 18:50 UTC1h 45m
2026-07-19 UAL2053 SFO → PDX Jul 19, 14:00 UTCJul 19, 15:40 UTC1h 40m
2026-07-19 UAL3907 HKG → GUM Jul 19, 09:45 UTCJul 19, 11:00 UTC1h 15m
2026-07-18 UAL1771 - Jul 18, 13:35 UTCJul 18, 15:50 UTC2h 15m
2026-07-18 UAL1439 EWR → SFO Jul 18, 01:39 UTCJul 18, 04:40 UTC3h 1m
2026-07-18 UAL1439 EWR → SFO Jul 18, 01:42 UTCJul 18, 04:35 UTC2h 53m
2026-07-17 UAL1535 - Jul 17, 23:39 UTCJul 18, 00:29 UTC50m
2026-07-17 UAL313 BOI → SFO Jul 17, 20:55 UTCJul 17, 21:44 UTC50m
2026-07-17 UAL2468 EWR → MSY Jul 17, 16:44 UTCJul 17, 19:15 UTC2h 30m
2026-07-17 UAL2233 SAT → EWR Jul 17, 11:39 UTCJul 17, 15:00 UTC3h 20m
2026-07-17 UAL2198 - Jul 17, 02:59 UTCJul 17, 03:34 UTC35m
2026-07-17 UAL2198 IAH → SAT Jul 17, 03:01 UTCJul 17, 03:33 UTC32m
2026-07-16 UAL1025 - Jul 16, 22:49 UTCJul 17, 00:35 UTC1h 45m
2026-07-16 UAL1090 - Jul 16, 19:40 UTCJul 16, 21:30 UTC1h 50m
2026-07-16 UAL1090 IAH → MEX Jul 16, 19:37 UTCJul 16, 21:28 UTC1h 51m
2026-07-16 UAL2472 - Jul 16, 14:25 UTCJul 16, 18:00 UTC3h 35m

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 N854UA page for operator, model, and routing details .

Mode-S ABB7F7 frequently asked

What is Mode-S code ABB7F7?
ABB7F7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N854UA.
Where is Mode-S ABB7F7 registered?
Mode-S code ABB7F7 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 ABB7F7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABB7F7, octal 52733767, decimal 11,253,751.
What flights does ABB7F7 operate?
Mode-S ABB7F7 has broadcast 20 distinct callsigns, including UAL543, UAL2364, UAL2097, UAL1836, UAL1639.