Apparatus

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sensors Mode-S transponder

A35B27

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N315UA · BOEING 737 MAX 8 · operated by AMERICAN AIRLINES INC

Hex
A35B27
Octal
50655447
Decimal
10,705,703
Country
US
Tail
N315UA
Type
B38M
No current signal · last broadcast 6h ago
Flights observed
456
Distinct callsigns
20
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S A35B27.

Country allocation

The ICAO 24-bit address A35B27 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
AAL1772 American Airlines 10 2026-06-11
AAL2644 - 8 2026-07-06
AAL3316 American Airlines 7 2026-06-07
AAL1382 American Airlines 7 2026-05-22
AAL3262 American Airlines 6 2026-05-29
AAL816 - 4 2026-06-26
AAL554 - 4 2026-07-12
AAL348 American Airlines 4 2026-05-22
AAL2916 American Airlines 4 2026-04-15
AAL2685 - 4 2026-07-13
AAL2637 - 4 2026-06-22
AAL2473 American Airlines 4 2026-06-18
AAL2405 - 4 2026-07-02
AAL2259 American Airlines 4 2026-06-04
AAL2004 American Airlines 4 2026-04-14
AAL1283 - 4 2026-06-28
AAL1185 - 4 2026-06-26
AAL1113 - 4 2026-06-19
AAL871 American Airlines 3 2026-06-06
AAL662 American Airlines 3 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AAL591 - Jul 13, 19:45 UTCJul 14, 00:35 UTC4h 50m
2026-07-13 AAL1966 - Jul 13, 13:00 UTCJul 13, 17:35 UTC4h 35m
2026-07-13 AAL1542 - Jul 13, 07:10 UTCJul 13, 11:10 UTC4h 0m
2026-07-13 AAL2685 - Jul 13, 02:55 UTCJul 13, 04:15 UTC1h 20m
2026-07-13 AAL2685 - Jul 13, 00:55 UTCJul 13, 01:50 UTC55m
2026-07-12 AAL554 - Jul 12, 20:45 UTCJul 12, 22:45 UTC2h 0m
2026-07-12 AAL554 DFW → PHX Jul 12, 20:45 UTCJul 12, 22:42 UTC1h 57m
2026-07-12 AAL2372 - Jul 12, 15:50 UTCJul 12, 18:40 UTC2h 50m
2026-07-12 AAL2372 SNA → DFW Jul 12, 15:50 UTCJul 12, 18:30 UTC2h 40m
2026-07-12 AAL519 - Jul 12, 02:20 UTCJul 12, 05:55 UTC3h 35m
2026-07-11 AAL250 - Jul 11, 19:20 UTCJul 11, 22:50 UTC3h 30m
2026-07-11 AAL250 MEX → ORD Jul 11, 19:19 UTCJul 11, 22:50 UTC3h 31m
2026-07-11 AAL249 - Jul 11, 14:00 UTCJul 11, 17:35 UTC3h 35m
2026-07-11 AAL3318 LGA → ORD Jul 11, 01:37 UTCJul 11, 03:34 UTC1h 57m
2026-07-11 AAL3318 LGA → ORD Jul 11, 01:40 UTCJul 11, 03:35 UTC1h 55m
2026-07-10 AAL1535 DFW → LGA Jul 10, 20:15 UTCJul 10, 23:20 UTC3h 5m
2026-07-10 AAL1535 LGA → FCA Jul 10, 20:11 UTCJul 10, 23:15 UTC3h 4m
2026-07-10 AAL3068 LGA → DFW Jul 10, 15:30 UTCJul 10, 18:45 UTC3h 15m
2026-07-10 AAL2723 - Jul 10, 12:35 UTCJul 10, 14:10 UTC1h 35m
2026-07-09 AAL2640 - Jul 9, 22:50 UTCJul 10, 02:40 UTC3h 50m
2026-07-09 AAL2640 SNA → ORD Jul 9, 22:48 UTCJul 10, 02:22 UTC3h 34m
2026-07-09 AAL2640 - Jul 9, 17:55 UTCJul 9, 21:40 UTC3h 45m
2026-07-09 AAL1431 MIA → ORD Jul 9, 12:45 UTCJul 9, 15:25 UTC2h 40m
2026-07-09 AAL2162 UIO → MIA Jul 9, 05:28 UTCJul 9, 09:16 UTC3h 48m
2026-07-08 AAL833 - Jul 8, 23:10 UTCJul 9, 01:00 UTC1h 50m
2026-07-08 AAL833 MIA → UIO Jul 8, 23:09 UTCJul 9, 02:46 UTC3h 37m
2026-07-08 AAL1126 - Jul 8, 20:10 UTCJul 8, 20:40 UTC30m
2026-07-08 AAL1126 BOG → MIA Jul 8, 17:26 UTCJul 8, 20:40 UTC3h 14m
2026-07-08 AAL1123 - Jul 8, 12:55 UTCJul 8, 13:15 UTC20m
2026-07-08 AAL1123 MIA → BOG Jul 8, 12:51 UTCJul 8, 16:02 UTC3h 11m
2026-07-07 AAL654 - Jul 7, 20:10 UTCJul 8, 01:35 UTC5h 25m
2026-07-07 AAL654 - Jul 7, 12:40 UTCJul 7, 18:20 UTC5h 40m
2026-07-07 AAL2654 LAS → ORD Jul 7, 06:20 UTCJul 7, 10:15 UTC3h 55m
2026-07-07 AAL2685 - Jul 7, 02:50 UTCJul 7, 03:45 UTC55m
2026-07-07 AAL2685 - Jul 7, 00:30 UTCJul 7, 01:25 UTC55m
2026-07-06 AAL554 DFW → PHX Jul 6, 20:47 UTCJul 6, 22:45 UTC1h 58m
2026-07-06 AAL554 - Jul 6, 20:50 UTCJul 6, 22:45 UTC1h 55m
2026-07-06 AAL2644 - Jul 6, 16:20 UTCJul 6, 18:50 UTC2h 30m
2026-07-06 AAL2644 SNA → DFW Jul 6, 16:18 UTCJul 6, 18:47 UTC2h 29m
2026-07-06 AAL2644 - Jul 6, 12:25 UTCJul 6, 15:00 UTC2h 35m
2026-07-06 AAL1662 - Jul 6, 02:00 UTCJul 6, 04:15 UTC2h 15m
2026-07-05 AAL1662 - Jul 5, 22:30 UTCJul 6, 00:30 UTC2h 0m
2026-07-05 AAL1122 - Jul 5, 07:30 UTCJul 5, 11:05 UTC3h 35m
2026-07-04 AAL1137 DFW → BOG Jul 4, 22:21 UTCJul 5, 03:07 UTC4h 46m
2026-07-04 AAL1137 - Jul 4, 22:25 UTCJul 5, 01:45 UTC3h 20m
2026-07-04 AAL2680 - Jul 4, 17:30 UTCJul 4, 20:00 UTC2h 30m
2026-07-04 AAL2680 SNA → DFW Jul 4, 17:27 UTCJul 4, 19:58 UTC2h 31m
2026-07-04 AAL2680 DFW → SNA Jul 4, 13:35 UTCJul 4, 16:20 UTC2h 45m
2026-07-03 AAL1122 - Jul 3, 23:15 UTCJul 4, 11:10 UTC11h 55m
2026-07-03 AAL1918 - Jul 3, 17:00 UTCJul 3, 19:00 UTC2h 0m

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 N315UA page for operator, model, and routing details .

Mode-S A35B27 frequently asked

What is Mode-S code A35B27?
A35B27 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N315UA.
Where is Mode-S A35B27 registered?
Mode-S code A35B27 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 A35B27 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A35B27, octal 50655447, decimal 10,705,703.
What flights does A35B27 operate?
Mode-S A35B27 has broadcast 20 distinct callsigns, including AAL1772, AAL2644, AAL3316, AAL1382, AAL3262.