Apparatus

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sensors Mode-S transponder

AB68F9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N834UA · AIRBUS A-319 · operated by UNITED AIRLINES INC

Hex
AB68F9
Octal
52664371
Decimal
11,233,529
Country
US
Tail
N834UA
Type
A319
Broadcasting now · callsign UAL1871 · 8,275 ft
Flights observed
227
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

AB68F9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AB68F9 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
UAL2256 United Airlines 6 2026-05-20
UAL1345 United Airlines 6 2026-04-17
UAL313 United Airlines 5 2026-04-17
UAL2026 United Airlines 4 2026-05-20
UAL1381 United Airlines 4 2026-04-21
UAL581 United Airlines 3 2026-05-15
UAL365 United Airlines 3 2026-05-16
UAL2272 United Airlines 3 2026-05-28
UAL1772 United Airlines 3 2026-04-27
UAL1085 United Airlines 3 2026-04-15
UAL1028 United Airlines 3 2026-04-14
UAL822 United Airlines 2 2026-05-07
UAL8157 United Airlines 2 2026-05-28
UAL719 United Airlines 2 2026-05-03
UAL694 United Airlines 2 2026-05-15
UAL691 United Airlines 2 2026-05-05
UAL685 United Airlines 2 2026-04-17
UAL625 United Airlines 2 2026-04-15
UAL465 United Airlines 2 2026-05-09
UAL412 United Airlines 2 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 UAL1899 ORD → YYC May 29, 22:10 UTCMay 30, 00:00 UTC1h 50m
2026-05-29 UAL1380 IAD → DFW May 29, 18:50 UTCMay 29, 21:00 UTC2h 10m
2026-05-29 UAL652 IAH → SJC May 29, 15:45 UTCMay 29, 17:30 UTC1h 45m
2026-05-29 UAL2381 MSY → IAD May 29, 12:25 UTCMay 29, 14:20 UTC1h 55m
2026-05-29 UAL1913 IAH → LAS May 29, 01:50 UTCMay 29, 03:35 UTC1h 45m
2026-05-28 UAL2272 MSP → DEN May 28, 22:06 UTCMay 28, 23:39 UTC1h 33m
2026-05-28 UAL2272 MSP → DEN May 28, 22:05 UTCMay 28, 23:50 UTC1h 45m
2026-05-28 UAL1068 EWR → ATL May 28, 18:05 UTCMay 28, 20:30 UTC2h 25m
2026-05-28 UAL8157 YYZ → CVG May 28, 15:15 UTCMay 28, 16:15 UTC1h 0m
2026-05-28 UAL8157 YYZ → CVG May 28, 15:11 UTCMay 28, 16:47 UTC1h 36m
2026-05-28 UAL1428 SFO → EWR May 28, 11:10 UTCMay 28, 13:10 UTC2h 0m
2026-05-28 UAL2060 IAD → BOS May 28, 01:10 UTCMay 28, 02:00 UTC50m
2026-05-27 UAL2107 ORD → CVG May 27, 22:30 UTCMay 27, 23:15 UTC45m
2026-05-27 UAL1844 EWR → MIA May 27, 18:45 UTCMay 27, 20:30 UTC1h 45m
2026-05-27 UAL642 CHS → EWR May 27, 15:15 UTCMay 27, 17:00 UTC1h 45m
2026-05-27 UAL2053 SFO → PDX May 27, 11:30 UTCMay 27, 13:05 UTC1h 35m
2026-05-26 UAL1991 EWR → SFO May 26, 22:35 UTCMay 27, 00:25 UTC1h 50m
2026-05-26 UAL1826 SFO → DEN May 26, 17:20 UTCMay 26, 19:05 UTC1h 45m
2026-05-26 UAL2669 SAT → SFO May 26, 13:10 UTCMay 26, 14:55 UTC1h 45m
2026-05-26 UAL2669 SAT → SFO May 26, 13:09 UTCMay 26, 14:54 UTC1h 45m
2026-05-26 UAL1525 RDU → EWR May 26, 10:14 UTCMay 26, 11:20 UTC1h 5m
2026-05-26 UAL1397 DEN → ORD May 26, 02:29 UTCMay 26, 03:45 UTC1h 15m
2026-05-25 UAL3934 FLL → ORD May 25, 22:19 UTCMay 26, 00:54 UTC2h 35m
2026-05-25 UAL3934 FLL → ORD May 25, 22:09 UTCMay 26, 00:49 UTC2h 40m
2026-05-24 UAL1344 EWR → MCO May 24, 15:15 UTCMay 24, 17:40 UTC2h 25m
2026-05-24 UAL2053 SFO → PDX May 24, 11:45 UTCMay 24, 13:20 UTC1h 35m
2026-05-24 UAL1635 LAX → IAD May 24, 02:40 UTCMay 24, 04:05 UTC1h 25m
2026-05-23 UAL1460 SFO → DEN May 23, 23:45 UTCMay 24, 01:10 UTC1h 25m
2026-05-23 UAL1608 MSN → DEN May 23, 19:15 UTCMay 23, 21:10 UTC1h 55m
2026-05-23 UAL2080 ORD → SFO May 23, 15:25 UTCMay 23, 17:40 UTC2h 15m
2026-05-23 UAL1771 SEA → ORD May 23, 11:20 UTCMay 23, 13:45 UTC2h 25m
2026-05-23 UAL657 CHS → EWR May 23, 00:50 UTCMay 23, 02:55 UTC2h 4m
2026-05-22 UAL2470 DEN → MCI May 22, 22:00 UTCMay 22, 23:35 UTC1h 35m
2026-05-22 UAL2764 IAD → EWR May 22, 18:45 UTCMay 22, 20:20 UTC1h 35m
2026-05-22 UAL596 IAD → EWR May 22, 16:05 UTCMay 22, 17:20 UTC1h 15m
2026-05-22 UAL1049 CUN → EWR May 22, 12:55 UTCMay 22, 14:20 UTC1h 25m
2026-05-22 UAL8102 YYZ → YQB May 22, 02:40 UTCMay 22, 04:10 UTC1h 30m
2026-05-21 UAL2272 MSP → DEN May 21, 22:20 UTCMay 22, 01:00 UTC2h 40m
2026-05-21 UAL1068 EWR → ATL May 21, 18:15 UTCMay 21, 20:50 UTC2h 35m
2026-05-21 UAL1041 SAN → EWR May 21, 14:45 UTCMay 21, 16:30 UTC1h 45m
2026-05-21 UAL1041 SAN → EWR May 21, 14:46 UTCMay 21, 16:34 UTC1h 48m
2026-05-20 UAL1478 SEA → SFO May 20, 21:40 UTCMay 20, 23:05 UTC1h 25m
2026-05-20 UAL2026 MTY → IAH May 20, 18:20 UTCMay 20, 19:20 UTC1h 0m
2026-05-20 UAL2256 IAH → MTY May 20, 16:00 UTCMay 20, 17:10 UTC1h 10m
2026-05-20 UAL2205 CMH → IAH May 20, 12:15 UTCMay 20, 14:40 UTC2h 25m
2026-05-20 UAL2086 EWR → ATL May 20, 00:25 UTCMay 20, 02:50 UTC2h 25m
2026-05-19 UAL404 SFO → DEN May 19, 21:20 UTCMay 19, 21:55 UTC35m
2026-05-19 UAL515 JFK → LAX May 19, 16:10 UTCMay 19, 19:40 UTC3h 30m
2026-05-19 UAL499 DEN → EWR May 19, 01:40 UTCMay 19, 03:30 UTC1h 50m
2026-05-18 UAL1478 SEA → SFO May 18, 22:55 UTCMay 19, 00:20 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 N834UA page for operator, model, and routing details .

Mode-S AB68F9 frequently asked

What is Mode-S code AB68F9?
AB68F9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N834UA.
Where is Mode-S AB68F9 registered?
Mode-S code AB68F9 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 AB68F9 broadcasting right now?
Yes. Mode-S AB68F9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB68F9, octal 52664371, decimal 11,233,529.
What flights does AB68F9 operate?
Mode-S AB68F9 has broadcast 20 distinct callsigns, including UAL2256, UAL1345, UAL313, UAL2026, UAL1381.