sensors Mode-S transponder

AC245C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8813Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC245C
Octal
53022134
Decimal
11,281,500
Country
US
Tail
N8813Q
Type
B38M
No current signal · last broadcast 1d ago
Flights observed
18
Distinct callsigns
9
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AC245C.

Country allocation

The ICAO 24-bit address AC245C 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
SWA2189 Southwest Airlines 4 2026-04-13
SWA237 - 3 2026-04-13
SWA4324 - 2 2026-04-13
SWA4298 - 2 2026-04-13
SWA2419 - 2 2026-04-12
SWA2188 - 2 2026-04-13
SWA546 - 1 2026-04-12
SWA399 - 1 2026-04-13
SWA3610 - 1 2026-04-13

Recent flights last 18

DateFlightRouteTakeoffLandingDuration
2026-04-13 SWA3610 - Apr 13, 19:51 UTCApr 13, 23:51 UTC4h 0m
2026-04-13 SWA2189 PSP → OAK Apr 13, 16:15 UTCApr 13, 18:55 UTC2h 40m
2026-04-13 SWA2189 PSP → OAK Apr 13, 15:50 UTCApr 13, 18:55 UTC3h 5m
2026-04-13 SWA2189 PSP → OAK Apr 13, 15:46 UTCApr 13, 18:54 UTC3h 8m
2026-04-13 SWA2189 PSP → OAK Apr 13, 15:48 UTCApr 13, 18:51 UTC3h 3m
2026-04-13 SWA2188 - Apr 13, 13:41 UTCApr 13, 14:39 UTC58m
2026-04-13 SWA2188 - Apr 13, 13:48 UTCApr 13, 14:42 UTC54m
2026-04-13 SWA399 - Apr 13, 06:36 UTCApr 13, 07:32 UTC56m
2026-04-13 SWA237 - Apr 13, 05:50 UTCApr 13, 05:55 UTC5m
2026-04-13 SWA237 - Apr 13, 04:34 UTCApr 13, 05:35 UTC1h 1m
2026-04-13 SWA237 - Apr 13, 04:42 UTCApr 13, 05:35 UTC53m
2026-04-13 SWA4324 - Apr 13, 02:31 UTCApr 13, 03:36 UTC1h 5m
2026-04-13 SWA4324 - Apr 13, 02:46 UTCApr 13, 03:45 UTC59m
2026-04-13 SWA4298 - Apr 13, 00:20 UTCApr 13, 01:40 UTC1h 20m
2026-04-12 SWA4298 - Apr 12, 23:55 UTCApr 13, 01:40 UTC1h 45m
2026-04-12 SWA2419 - Apr 12, 19:22 UTCApr 12, 22:13 UTC2h 51m
2026-04-12 SWA2419 - Apr 12, 19:53 UTCApr 12, 22:44 UTC2h 51m
2026-04-12 SWA546 - Apr 12, 17:15 UTCApr 12, 18:40 UTC1h 25m

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 N8813Q page for operator, model, and routing details .

Mode-S AC245C frequently asked

What is Mode-S code AC245C?
AC245C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8813Q.
Where is Mode-S AC245C registered?
Mode-S code AC245C 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 AC245C 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 AC245C, octal 53022134, decimal 11,281,500.
What flights does AC245C operate?
Mode-S AC245C has broadcast 9 distinct callsigns, including SWA2189, SWA237, SWA4324, SWA4298, SWA2419.