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
Broadcasting now · callsign AAL2996 · 37,000 ft
Flights observed
516
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:40 UTC

Current position

A35B27 is currently broadcasting. Map zoomed to live position.

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
AAL3316 - 8 2026-07-15
AAL2644 - 8 2026-07-06
AAL554 American Airlines 7 2026-07-26
AAL1382 American Airlines 7 2026-05-22
AAL3262 American Airlines 6 2026-05-29
AAL2640 - 5 2026-07-17
AAL833 - 4 2026-07-14
AAL816 - 4 2026-06-26
AAL519 American Airlines 4 2026-07-22
AAL348 American Airlines 4 2026-05-22
AAL329 - 4 2026-07-18
AAL3256 American Airlines 4 2026-07-22
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL554 PHL → ORD Jul 26, 20:45 UTCJul 26, 21:40 UTC55m
2026-07-26 AAL554 PHL → ORD Jul 26, 16:45 UTCJul 26, 18:55 UTC2h 10m
2026-07-26 AAL1741 SJD → DFW Jul 26, 13:10 UTCJul 26, 14:35 UTC1h 25m
2026-07-25 AAL3251 CHS → PHL Jul 25, 23:10 UTCJul 26, 01:55 UTC2h 45m
2026-07-25 AAL1911 CLT → PHX Jul 25, 18:20 UTCJul 25, 21:05 UTC2h 45m
2026-07-25 AAL1911 CLT → PHX Jul 25, 14:15 UTCJul 25, 16:55 UTC2h 40m
2026-07-25 AAL1959 PHL → ORD Jul 25, 11:20 UTCJul 25, 11:45 UTC25m
2026-07-25 AAL1959 PHL → ORD Jul 25, 11:05 UTCJul 25, 12:23 UTC1h 18m
2026-07-25 AAL2034 LGA → CLT Jul 25, 00:30 UTCJul 25, 01:25 UTC55m
2026-07-24 AAL2926 DFW → TUS Jul 24, 21:00 UTCJul 24, 22:55 UTC1h 55m
2026-07-24 AAL2926 DFW → TUS Jul 24, 18:15 UTCJul 24, 19:55 UTC1h 40m
2026-07-24 AAL1019 SJC → DFW Jul 24, 13:20 UTCJul 24, 16:35 UTC3h 15m
2026-07-24 AAL1940 MEM → DFW Jul 24, 02:55 UTCJul 24, 05:55 UTC3h 0m
2026-07-23 AAL584 DFW → TUS Jul 23, 23:05 UTCJul 24, 01:05 UTC2h 0m
2026-07-23 AAL584 DFW → TUS Jul 23, 20:25 UTCJul 23, 22:10 UTC1h 45m
2026-07-23 AAL554 PHL → ORD Jul 23, 16:50 UTCJul 23, 18:45 UTC1h 55m
2026-07-23 AAL628 - Jul 23, 14:05 UTCJul 23, 15:00 UTC55m
2026-07-22 AAL519 BGI → CLT Jul 22, 23:40 UTCJul 23, 03:25 UTC3h 45m
2026-07-22 AAL519 BGI → CLT Jul 22, 23:36 UTCJul 23, 03:20 UTC3h 44m
2026-07-22 AAL1705 LGA → ORD Jul 22, 19:25 UTCJul 22, 21:35 UTC2h 10m
2026-07-22 AAL3256 IND → MIA Jul 22, 15:15 UTCJul 22, 15:45 UTC30m
2026-07-22 AAL3256 IND → MIA Jul 22, 15:11 UTCJul 22, 17:37 UTC2h 26m
2026-07-21 AAL916 - Jul 21, 19:35 UTCJul 21, 22:40 UTC3h 5m
2026-07-21 AAL913 - Jul 21, 14:40 UTCJul 21, 15:05 UTC25m
2026-07-21 AAL913 MIA → BOG Jul 21, 14:38 UTCJul 21, 17:52 UTC3h 14m
2026-07-21 AAL1252 - Jul 21, 11:45 UTCJul 21, 12:30 UTC45m
2026-07-21 AAL1252 - Jul 21, 10:20 UTCJul 21, 12:30 UTC2h 10m
2026-07-21 AAL1252 PHL → MIA Jul 21, 10:17 UTCJul 21, 11:28 UTC1h 11m
2026-07-21 AAL3247 BUR → PHX Jul 21, 01:40 UTCJul 21, 04:40 UTC3h 0m
2026-07-20 AAL3196 DCA → MSY Jul 20, 21:46 UTCJul 21, 00:22 UTC2h 36m
2026-07-20 AAL3196 DCA → MSY Jul 20, 21:50 UTCJul 21, 00:25 UTC2h 34m
2026-07-20 AAL2490 - Jul 20, 16:25 UTCJul 20, 18:50 UTC2h 25m
2026-07-20 AAL2490 FLL → LGA Jul 20, 16:21 UTCJul 20, 18:50 UTC2h 29m
2026-07-20 AAL2490 LGA → FLL Jul 20, 12:45 UTCJul 20, 15:10 UTC2h 25m
2026-07-19 AAL2165 - Jul 19, 23:25 UTCJul 20, 02:05 UTC2h 40m
2026-07-19 AAL2165 MSY → LGA Jul 19, 23:25 UTCJul 20, 02:07 UTC2h 42m
2026-07-19 AAL2165 LGA → MSY Jul 19, 19:05 UTCJul 19, 22:10 UTC3h 5m
2026-07-19 AAL388 ORD → LGA Jul 19, 15:00 UTCJul 19, 16:40 UTC1h 40m
2026-07-19 AAL388 ORD → LGA Jul 19, 15:00 UTCJul 19, 16:33 UTC1h 33m
2026-07-19 AAL1305 DFW → PLS Jul 19, 07:25 UTCJul 19, 10:50 UTC3h 25m
2026-07-19 AAL1305 DFW → PLS Jul 19, 02:25 UTCJul 19, 06:20 UTC3h 55m
2026-07-18 AAL1168 - Jul 18, 20:05 UTCJul 18, 23:20 UTC3h 15m
2026-07-18 AAL1168 - Jul 18, 19:25 UTCJul 18, 19:30 UTC5m
2026-07-18 AAL329 - Jul 18, 17:45 UTCJul 18, 17:55 UTC10m
2026-07-18 AAL329 - Jul 18, 14:00 UTCJul 18, 17:10 UTC3h 10m
2026-07-17 AAL2640 - Jul 17, 23:30 UTCJul 18, 03:10 UTC3h 41m
2026-07-17 AAL2640 - Jul 17, 17:20 UTCJul 17, 20:55 UTC3h 35m
2026-07-17 AAL1431 MIA → ORD Jul 17, 12:50 UTCJul 17, 15:29 UTC2h 40m
2026-07-16 AAL316G - Jul 16, 22:40 UTCJul 16, 23:05 UTC25m
2026-07-16 AAL316G SXM → MIA Jul 16, 20:24 UTCJul 16, 23:02 UTC2h 38m

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?
Yes. Mode-S A35B27 is currently airborne.
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, AAL3316, AAL2644, AAL554, AAL1382.