sensors Mode-S transponder

AC3E13

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8881L · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC3E13
Octal
53037023
Decimal
11,288,083
Country
US
Tail
N8881L
Type
B38M
No current signal · last broadcast 20h ago
Flights observed
15
Distinct callsigns
9
Country
US
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S AC3E13.

Country allocation

The ICAO 24-bit address AC3E13 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 9 distinct

Callsign Airline Flights Last seen
SWA1232 - 4 2026-04-13
SWA2573 - 3 2026-04-13
SWA1595 - 2 2026-04-13
SWA998 - 1 2026-04-12
SWA716 - 1 2026-04-12
SWA3485 - 1 2026-04-13
SWA2757 Southwest Airlines 1 2026-04-13
SWA2230 - 1 2026-04-13
SWA1714 - 1 2026-04-14

Recent flights last 15

DateFlightRouteTakeoffLandingDuration
2026-04-14 SWA1714 - Apr 14, 10:15 UTCApr 14, 11:05 UTC50m
2026-04-13 SWA1595 - Apr 13, 22:35 UTCApr 14, 00:10 UTC1h 35m
2026-04-13 SWA1595 - Apr 13, 20:27 UTCApr 13, 21:34 UTC1h 7m
2026-04-13 SWA3485 - Apr 13, 18:03 UTCApr 13, 19:21 UTC1h 18m
2026-04-13 SWA1232 - Apr 13, 16:15 UTCApr 13, 17:15 UTC1h 0m
2026-04-13 SWA1232 - Apr 13, 15:50 UTCApr 13, 17:15 UTC1h 25m
2026-04-13 SWA1232 - Apr 13, 14:51 UTCApr 13, 17:06 UTC2h 15m
2026-04-13 SWA1232 - Apr 13, 15:02 UTCApr 13, 17:16 UTC2h 14m
2026-04-13 SWA2573 - Apr 13, 12:20 UTCApr 13, 13:45 UTC1h 25m
2026-04-13 SWA2573 - Apr 13, 11:55 UTCApr 13, 13:45 UTC1h 50m
2026-04-13 SWA2573 - Apr 13, 11:17 UTCApr 13, 13:44 UTC2h 27m
2026-04-13 SWA2757 BWI → PWM Apr 13, 04:27 UTCApr 13, 06:59 UTC2h 32m
2026-04-13 SWA2230 - Apr 13, 01:10 UTCApr 13, 03:40 UTC2h 30m
2026-04-12 SWA998 - Apr 12, 19:55 UTCApr 12, 20:15 UTC20m
2026-04-12 SWA716 BNA → MSY Apr 12, 17:35 UTCApr 12, 18:45 UTC1h 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 N8881L page for operator, model, and routing details .

Mode-S AC3E13 frequently asked

What is Mode-S code AC3E13?
AC3E13 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8881L.
Where is Mode-S AC3E13 registered?
Mode-S code AC3E13 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 AC3E13 broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC3E13, octal 53037023, decimal 11,288,083.
What flights does AC3E13 operate?
Mode-S AC3E13 has broadcast 9 distinct callsigns, including SWA1232, SWA2573, SWA1595, SWA998, SWA716.