Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ABFBD0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N871UA · AIRBUS A-319 · operated by UMB BANK NA TRUSTEE

Hex
ABFBD0
Octal
52775720
Decimal
11,271,120
Country
US
Tail
N871UA
Type
A319
Transponder active on ground
Flights observed
144
Distinct callsigns
20
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S ABFBD0.

Country allocation

The ICAO 24-bit address ABFBD0 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
UAL822 United Airlines 3 2026-04-30
UAL2603 United Airlines 3 2026-05-02
UAL1823 United Airlines 3 2026-05-05
UAL1780 United Airlines 3 2026-05-07
UAL1747 United Airlines 3 2026-05-05
UAL1612 United Airlines 3 2026-06-02
UAL1193 United Airlines 3 2026-06-02
UAL1069 United Airlines 3 2026-06-04
UAL685 United Airlines 2 2026-04-22
UAL659 United Airlines 2 2026-05-06
UAL630 United Airlines 2 2026-04-25
UAL472 United Airlines 2 2026-04-27
UAL466 United Airlines 2 2026-06-03
UAL445 United Airlines 2 2026-05-02
UAL412 United Airlines 2 2026-04-30
UAL363 United Airlines 2 2026-05-07
UAL340 United Airlines 2 2026-05-31
UAL2805 United Airlines 2 2026-06-01
UAL2668 United Airlines 2 2026-05-07
UAL2483 United Airlines 2 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-05 UAL1673 CLE → ORD Jun 5, 01:57 UTCJun 5, 03:22 UTC1h 25m
2026-06-05 UAL1673 CLE → ORD Jun 5, 01:40 UTCJun 5, 03:25 UTC1h 45m
2026-06-04 UAL1182 ORD → MCI Jun 4, 22:55 UTCJun 4, 23:45 UTC50m
2026-06-04 UAL1069 SFO → LAX Jun 4, 20:08 UTCJun 4, 20:40 UTC32m
2026-06-04 UAL1069 SFO → LAX Jun 4, 19:50 UTCJun 4, 20:45 UTC55m
2026-06-04 UAL1920 EUG → SFO Jun 4, 16:30 UTCJun 4, 18:10 UTC1h 40m
2026-06-04 UAL2034 IAH → SFO Jun 4, 12:50 UTCJun 4, 14:25 UTC1h 35m
2026-06-03 UAL2059 SFO → EWR Jun 3, 22:05 UTCJun 3, 23:25 UTC1h 20m
2026-06-03 UAL1239 EWR → RDU Jun 3, 19:20 UTCJun 3, 20:40 UTC1h 20m
2026-06-03 UAL1129 EWR → SEA Jun 3, 16:10 UTCJun 3, 16:50 UTC40m
2026-06-03 UAL466 AUS → EWR Jun 3, 14:10 UTCJun 3, 14:45 UTC35m
2026-06-03 UAL466 AUS → EWR Jun 3, 14:10 UTCJun 3, 14:42 UTC32m
2026-06-03 UAL2333 ORD → SFO Jun 3, 10:20 UTCJun 3, 12:15 UTC1h 55m
2026-06-03 UAL2362 LGA → ORD Jun 3, 00:20 UTCJun 3, 01:55 UTC1h 35m
2026-06-02 UAL1842 IAD → DEN Jun 2, 20:25 UTCJun 2, 22:20 UTC1h 55m
2026-06-02 UAL1612 IAH → BOS Jun 2, 17:10 UTCJun 2, 18:45 UTC1h 35m
2026-06-02 UAL1878 LGA → ORD Jun 2, 11:50 UTCJun 2, 14:05 UTC2h 15m
2026-06-02 UAL312 DSM → ORD Jun 2, 02:50 UTCJun 2, 04:55 UTC2h 5m
2026-06-02 UAL1193 IAH → SFO Jun 2, 01:15 UTCJun 2, 01:20 UTC5m
2026-06-01 UAL1193 IAH → SFO Jun 1, 23:39 UTCJun 2, 00:58 UTC1h 19m
2026-06-01 UAL1193 IAH → SFO Jun 1, 23:40 UTCJun 2, 01:20 UTC1h 40m
2026-06-01 UAL1941 IAD → EWR Jun 1, 20:25 UTCJun 1, 21:45 UTC1h 20m
2026-06-01 UAL576 MIA → DEN Jun 1, 16:35 UTCJun 1, 17:55 UTC1h 20m
2026-06-01 UAL2805 EWR → HNL Jun 1, 14:20 UTCJun 1, 15:30 UTC1h 10m
2026-06-01 UAL2805 EWR → HNL Jun 1, 14:20 UTCJun 1, 15:28 UTC1h 8m
2026-06-01 UAL2797 ORD → GRR Jun 1, 12:00 UTCJun 1, 12:40 UTC40m
2026-06-01 UAL2605 SJC → DEN Jun 1, 00:35 UTCJun 1, 01:10 UTC35m
2026-05-31 UAL340 SFO → DEN May 31, 21:00 UTCMay 31, 23:15 UTC2h 15m
2026-05-31 UAL2846 ORD → ABQ May 31, 16:50 UTCMay 31, 19:25 UTC2h 35m
2026-05-31 UAL1612 IAH → BOS May 31, 11:21 UTCMay 31, 12:29 UTC1h 8m
2026-05-31 UAL1612 IAH → BOS May 31, 11:25 UTCMay 31, 12:35 UTC1h 10m
2026-05-30 UAL2496 PDX → SFO May 30, 23:25 UTCMay 31, 00:35 UTC1h 10m
2026-05-30 UAL739 SFO → AUS May 30, 20:20 UTCMay 30, 21:30 UTC1h 10m
2026-05-30 UAL247 DTW → ORD May 30, 18:00 UTCMay 30, 19:00 UTC1h 0m
2026-05-30 UAL2298 SFO → PHX May 30, 13:50 UTCMay 30, 15:40 UTC1h 50m
2026-05-30 UAL2298 SFO → PHX May 30, 14:05 UTCMay 30, 15:33 UTC1h 28m
2026-05-29 UAL2417 SFO → BNA May 29, 23:30 UTCMay 30, 01:05 UTC1h 35m
2026-05-29 UAL303 FLL → EWR May 29, 20:50 UTCMay 29, 21:45 UTC55m
2026-05-29 UAL561 BOS → ORD May 29, 17:55 UTCMay 29, 18:50 UTC55m
2026-05-29 UAL1577 RNO → SFO May 29, 14:30 UTCMay 29, 16:00 UTC1h 30m
2026-05-29 UAL1287 SFO → BOS May 29, 00:25 UTCMay 29, 02:10 UTC1h 45m
2026-05-28 UAL555 EUG → SFO May 28, 21:20 UTCMay 28, 23:05 UTC1h 45m
2026-05-28 UAL1307 EWR → BUF May 28, 17:25 UTCMay 28, 19:10 UTC1h 45m
2026-05-24 UAL2233 SNA → EWR May 24, 11:45 UTCMay 24, 14:55 UTC3h 10m
2026-05-24 UAL1542 SFO → YVR May 24, 02:10 UTCMay 24, 02:45 UTC35m
2026-05-24 UAL3887 PDX → SFO May 24, 00:25 UTCMay 24, 00:50 UTC25m
2026-05-10 UAL3881 VCV → SFO May 10, 01:14 UTCMay 10, 03:00 UTC1h 45m
2026-05-09 UAL1813 CVG → ORD May 9, 22:15 UTCMay 9, 23:09 UTC55m
2026-05-09 UAL2138 ORD → EWR May 9, 20:20 UTCMay 9, 21:00 UTC40m
2026-05-08 UAL1237 SFO → SEA May 8, 00:14 UTCMay 8, 01:04 UTC50m

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 N871UA page for operator, model, and routing details .

Mode-S ABFBD0 frequently asked

What is Mode-S code ABFBD0?
ABFBD0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N871UA.
Where is Mode-S ABFBD0 registered?
Mode-S code ABFBD0 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 ABFBD0 broadcasting right now?
Mode-S ABFBD0 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABFBD0, octal 52775720, decimal 11,271,120.
What flights does ABFBD0 operate?
Mode-S ABFBD0 has broadcast 20 distinct callsigns, including UAL822, UAL2603, UAL1823, UAL1780, UAL1747.