sensors Mode-S transponder

AC5AB7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8953Q · operated by SOUTHWEST AIRLINES CO

Hex
AC5AB7
Octal
53055267
Decimal
11,295,415
Country
US
Tail
N8953Q
Type
B38M
No current signal · last broadcast 17h ago
Flights observed
12
Distinct callsigns
7
Country
US
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S AC5AB7.

Country allocation

The ICAO 24-bit address AC5AB7 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 7 distinct

Callsign Airline Flights Last seen
SWA1882 Southwest Airlines 3 2026-04-13
SWA477 - 2 2026-04-13
SWA3385 Southwest Airlines 2 2026-04-14
SWA1048 - 2 2026-04-13
SWA588 Southwest Airlines 1 2026-04-12
SWA3084 - 1 2026-04-13
SWA1311 - 1 2026-04-13

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 SWA3385 ALB → DEN Apr 14, 05:20 UTCApr 14, 06:10 UTC50m
2026-04-13 SWA3385 - Apr 13, 22:35 UTCApr 13, 23:40 UTC1h 5m
2026-04-13 SWA1311 - Apr 13, 20:10 UTCApr 13, 21:39 UTC1h 29m
2026-04-13 SWA1882 MCI → TPA Apr 13, 17:55 UTCApr 13, 19:04 UTC1h 9m
2026-04-13 SWA1882 MCI → TPA Apr 13, 16:15 UTCApr 13, 16:55 UTC40m
2026-04-13 SWA1882 MCI → TPA Apr 13, 16:00 UTCApr 13, 16:15 UTC15m
2026-04-13 SWA3084 MCO → BNA Apr 13, 13:20 UTCApr 13, 14:55 UTC1h 35m
2026-04-13 SWA477 - Apr 13, 11:55 UTCApr 13, 12:00 UTC5m
2026-04-13 SWA477 - Apr 13, 09:31 UTCApr 13, 11:55 UTC2h 24m
2026-04-13 SWA1048 - Apr 13, 00:20 UTCApr 13, 01:20 UTC1h 0m
2026-04-13 SWA1048 - Apr 13, 00:05 UTCApr 13, 01:20 UTC1h 15m
2026-04-12 SWA588 BNA → TPA Apr 12, 18:03 UTCApr 12, 20:33 UTC2h 30m

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 N8953Q page for operator, model, and routing details .

Mode-S AC5AB7 frequently asked

What is Mode-S code AC5AB7?
AC5AB7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8953Q.
Where is Mode-S AC5AB7 registered?
Mode-S code AC5AB7 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 AC5AB7 broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC5AB7, octal 53055267, decimal 11,295,415.
What flights does AC5AB7 operate?
Mode-S AC5AB7 has broadcast 7 distinct callsigns, including SWA1882, SWA477, SWA3385, SWA1048, SWA588.