Apparatus

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sensors Mode-S transponder

AAFDA1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N807UA · AIRBUS A-319 · operated by UNITED AIRLINES INC

Hex
AAFDA1
Octal
52576641
Decimal
11,206,049
Country
US
Tail
N807UA
Type
A319
No current signal · last broadcast Jul 26, 21:50 UTC
Flights observed
462
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:50 UTC

Last known position

Most recent position reported by Mode-S AAFDA1.

Country allocation

The ICAO 24-bit address AAFDA1 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
UAL451 - 6 2026-06-22
UAL515 - 5 2026-07-12
UAL2763 United Airlines 5 2026-07-25
UAL247 United Airlines 5 2026-07-25
UAL2317 United Airlines 5 2026-07-25
UAL1711 - 5 2026-07-14
UAL578 United Airlines 4 2026-07-08
UAL2775 United Airlines 4 2026-06-22
UAL2728 - 4 2026-06-23
UAL2684 United Airlines 4 2026-07-25
UAL2483 - 4 2026-07-09
UAL2437 United Airlines 4 2026-06-13
UAL2333 - 4 2026-06-23
UAL2298 United Airlines 4 2026-07-24
UAL2218 - 4 2026-06-27
UAL1842 - 4 2026-06-20
UAL622 - 3 2026-06-27
UAL591 - 3 2026-07-10
UAL439 - 3 2026-07-05
UAL428 United Airlines 3 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1608 MSN → DEN Jul 26, 20:05 UTCJul 26, 21:50 UTC1h 45m
2026-07-26 UAL2172 IAH → PHL Jul 26, 15:30 UTCJul 26, 18:20 UTC2h 50m
2026-07-26 UAL1309 EWR → SNA Jul 26, 11:10 UTCJul 26, 13:40 UTC2h 30m
2026-07-26 UAL2060 IAD → BOS Jul 26, 02:05 UTCJul 26, 02:55 UTC50m
2026-07-25 UAL2763 PHL → IAH Jul 25, 22:28 UTCJul 25, 23:03 UTC35m
2026-07-25 UAL2763 PHL → IAH Jul 25, 22:25 UTCJul 25, 23:10 UTC45m
2026-07-25 UAL2763 PHL → IAH Jul 25, 18:55 UTCJul 25, 20:45 UTC1h 50m
2026-07-25 UAL2684 PHL → ORD Jul 25, 16:00 UTCJul 25, 17:29 UTC1h 29m
2026-07-25 UAL2684 PHL → ORD Jul 25, 16:05 UTCJul 25, 17:35 UTC1h 30m
2026-07-25 UAL247 DTW → ORD Jul 25, 12:40 UTCJul 25, 14:05 UTC1h 25m
2026-07-25 UAL247 DTW → ORD Jul 25, 12:42 UTCJul 25, 13:50 UTC1h 8m
2026-07-25 UAL2317 EWR → AUS Jul 25, 03:30 UTCJul 25, 04:40 UTC1h 10m
2026-07-24 UAL658 AUS → EWR Jul 24, 22:35 UTCJul 24, 23:45 UTC1h 10m
2026-07-24 UAL2298 SFO → PHX Jul 24, 20:05 UTCJul 24, 21:10 UTC1h 5m
2026-07-24 UAL2298 SFO → PHX Jul 24, 20:03 UTCJul 24, 21:06 UTC1h 3m
2026-07-24 UAL592 - Jul 24, 15:50 UTCJul 24, 17:35 UTC1h 45m
2026-07-24 UAL2795 - Jul 24, 12:35 UTCJul 24, 14:15 UTC1h 40m
2026-07-24 UAL785 ORD → PWM Jul 24, 01:30 UTCJul 24, 03:15 UTC1h 45m
2026-07-23 UAL1991 EWR → SFO Jul 23, 22:15 UTCJul 24, 00:00 UTC1h 45m
2026-07-23 UAL2763 PHL → IAH Jul 23, 19:00 UTCJul 23, 20:40 UTC1h 40m
2026-07-23 UAL2684 PHL → ORD Jul 23, 16:10 UTCJul 23, 17:30 UTC1h 20m
2026-07-23 UAL247 DTW → ORD Jul 23, 13:25 UTCJul 23, 14:50 UTC1h 25m
2026-07-23 UAL247 DTW → ORD Jul 23, 13:07 UTCJul 23, 14:34 UTC1h 27m
2026-07-23 UAL2317 EWR → AUS Jul 23, 03:00 UTCJul 23, 04:15 UTC1h 15m
2026-07-23 UAL2317 EWR → AUS Jul 23, 03:06 UTCJul 23, 04:13 UTC1h 7m
2026-07-22 UAL1639 STL → ORD Jul 22, 23:10 UTCJul 23, 00:00 UTC50m
2026-07-22 UAL1639 STL → ORD Jul 22, 23:11 UTCJul 22, 23:43 UTC32m
2026-07-22 UAL1639 DEN → STL Jul 22, 19:45 UTCJul 22, 21:20 UTC1h 35m
2026-07-22 UAL1963 - Jul 22, 12:50 UTCJul 22, 15:50 UTC3h 0m
2026-07-22 UAL616 SJC → ORD Jul 22, 00:10 UTCJul 22, 02:50 UTC2h 40m
2026-07-21 UAL2671 IAD → SAT Jul 21, 20:40 UTCJul 21, 22:05 UTC1h 25m
2026-07-21 UAL1188 RDM → DEN Jul 21, 18:00 UTCJul 21, 19:35 UTC1h 35m
2026-07-21 UAL1081 - Jul 21, 14:30 UTCJul 21, 16:05 UTC1h 35m
2026-07-21 UAL1282 EWR → RSW Jul 21, 01:40 UTCJul 21, 03:15 UTC1h 35m
2026-07-20 UAL1510 - Jul 20, 21:30 UTCJul 20, 23:55 UTC2h 24m
2026-07-20 UAL1479 - Jul 20, 17:55 UTCJul 20, 20:05 UTC2h 10m
2026-07-20 UAL1049 CUN → EWR Jul 20, 12:25 UTCJul 20, 14:05 UTC1h 40m
2026-07-20 UAL1913 - Jul 20, 01:45 UTCJul 20, 03:35 UTC1h 50m
2026-07-19 UAL2272 MSP → DEN Jul 19, 22:50 UTCJul 20, 00:20 UTC1h 30m
2026-07-19 UAL1068 EWR → MSP Jul 19, 19:00 UTCJul 19, 21:35 UTC2h 35m
2026-07-19 UAL2461 BNA → EWR Jul 19, 14:45 UTCJul 19, 16:25 UTC1h 40m
2026-07-19 UAL1428 EWR → BNA Jul 19, 11:20 UTCJul 19, 13:10 UTC1h 50m
2026-07-18 UAL2053 ATL → EWR Jul 18, 11:30 UTCJul 18, 13:20 UTC1h 50m
2026-07-18 UAL2053 ATL → EWR Jul 18, 11:29 UTCJul 18, 13:16 UTC1h 47m
2026-07-18 UAL8160 YYZ → DEL Jul 18, 03:35 UTCJul 18, 05:05 UTC1h 30m
2026-07-17 UAL2211 - Jul 17, 22:45 UTCJul 18, 01:15 UTC2h 30m
2026-07-17 UAL1451 - Jul 17, 18:10 UTCJul 17, 21:10 UTC3h 0m
2026-07-17 UAL1506 - Jul 17, 12:25 UTCJul 17, 14:39 UTC2h 15m
2026-07-17 UAL2027 DEN → SDF Jul 17, 00:45 UTCJul 17, 02:54 UTC2h 10m
2026-07-16 UAL314 - Jul 16, 20:09 UTCJul 16, 22:49 UTC2h 40m

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 N807UA page for operator, model, and routing details .

Mode-S AAFDA1 frequently asked

What is Mode-S code AAFDA1?
AAFDA1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N807UA.
Where is Mode-S AAFDA1 registered?
Mode-S code AAFDA1 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 AAFDA1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAFDA1, octal 52576641, decimal 11,206,049.
What flights does AAFDA1 operate?
Mode-S AAFDA1 has broadcast 20 distinct callsigns, including UAL451, UAL515, UAL2763, UAL247, UAL2317.