sensors Mode-S transponder

AC4801

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8902Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC4801
Octal
53044001
Decimal
11,290,625
Country
US
Tail
N8902Q
Type
B38M
No current signal · last broadcast 1d ago
Flights observed
15
Distinct callsigns
6
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AC4801.

Country allocation

The ICAO 24-bit address AC4801 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 6 distinct

Callsign Airline Flights Last seen
SWA1863 - 4 2026-04-13
SWA3466 - 3 2026-04-13
SWA692 - 2 2026-04-12
SWA505 Southwest Airlines 2 2026-04-13
SWA4610 - 2 2026-04-13
SWA2126 - 2 2026-04-13

Recent flights last 15

DateFlightRouteTakeoffLandingDuration
2026-04-13 SWA505 MIA → DAL Apr 13, 20:05 UTCApr 14, 00:03 UTC3h 58m
2026-04-13 SWA505 MIA → DAL Apr 13, 18:10 UTCApr 13, 19:25 UTC1h 15m
2026-04-13 SWA3466 - Apr 13, 16:15 UTCApr 13, 16:40 UTC25m
2026-04-13 SWA3466 - Apr 13, 15:50 UTCApr 13, 16:40 UTC50m
2026-04-13 SWA3466 - Apr 13, 15:35 UTCApr 13, 16:15 UTC40m
2026-04-13 SWA2126 - Apr 13, 13:21 UTCApr 13, 14:34 UTC1h 13m
2026-04-13 SWA2126 - Apr 13, 13:21 UTCApr 13, 14:24 UTC1h 3m
2026-04-13 SWA1863 - Apr 13, 04:25 UTCApr 13, 06:45 UTC2h 20m
2026-04-13 SWA1863 - Apr 13, 03:55 UTCApr 13, 06:52 UTC2h 57m
2026-04-13 SWA1863 - Apr 13, 02:05 UTCApr 13, 02:45 UTC40m
2026-04-13 SWA1863 - Apr 13, 00:49 UTCApr 13, 01:47 UTC58m
2026-04-13 SWA4610 - Apr 13, 00:20 UTCApr 13, 00:30 UTC10m
2026-04-12 SWA4610 - Apr 12, 23:55 UTCApr 13, 00:30 UTC35m
2026-04-12 SWA692 - Apr 12, 19:42 UTCApr 12, 21:19 UTC1h 37m
2026-04-12 SWA692 - Apr 12, 17:15 UTCApr 12, 19:25 UTC2h 10m

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 N8902Q page for operator, model, and routing details .

Mode-S AC4801 frequently asked

What is Mode-S code AC4801?
AC4801 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8902Q.
Where is Mode-S AC4801 registered?
Mode-S code AC4801 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 AC4801 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC4801, octal 53044001, decimal 11,290,625.
What flights does AC4801 operate?
Mode-S AC4801 has broadcast 6 distinct callsigns, including SWA1863, SWA3466, SWA692, SWA505, SWA4610.