sensors Mode-S transponder

AC47B7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8900L · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC47B7
Octal
53043667
Decimal
11,290,551
Country
US
Tail
N8900L
Type
B38M
Broadcasting now · callsign SWA3644 · 20,975 ft
Flights observed
15
Distinct callsigns
7
Country
US
Last broadcast
12h ago

Current position

AC47B7 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC47B7 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
SWA3936 - 5 2026-04-13
SWA3378 - 4 2026-04-13
SWA1557 - 2 2026-04-13
SWA813 - 1 2026-04-12
SWA667 Southwest Airlines 1 2026-04-14
SWA663 - 1 2026-04-13
SWA2508 - 1 2026-04-12

Recent flights last 15

DateFlightRouteTakeoffLandingDuration
2026-04-14 SWA667 BDL → MCO Apr 14, 10:45 UTCApr 14, 11:05 UTC20m
2026-04-13 SWA663 - Apr 13, 20:35 UTCApr 13, 22:20 UTC1h 45m
2026-04-13 SWA3936 - Apr 13, 17:07 UTCApr 13, 19:09 UTC2h 2m
2026-04-13 SWA3936 - Apr 13, 17:25 UTCApr 13, 19:21 UTC1h 56m
2026-04-13 SWA3936 - Apr 13, 16:15 UTCApr 13, 16:20 UTC5m
2026-04-13 SWA3936 - Apr 13, 15:50 UTCApr 13, 16:20 UTC30m
2026-04-13 SWA3936 - Apr 13, 13:50 UTCApr 13, 16:15 UTC2h 25m
2026-04-13 SWA3378 - Apr 13, 04:20 UTCApr 13, 07:20 UTC3h 0m
2026-04-13 SWA3378 - Apr 13, 03:55 UTCApr 13, 07:20 UTC3h 25m
2026-04-13 SWA3378 - Apr 13, 02:56 UTCApr 13, 07:00 UTC4h 4m
2026-04-13 SWA3378 - Apr 13, 03:08 UTCApr 13, 06:56 UTC3h 48m
2026-04-13 SWA1557 - Apr 13, 00:25 UTCApr 13, 01:50 UTC1h 25m
2026-04-12 SWA1557 - Apr 12, 23:56 UTCApr 13, 01:37 UTC1h 41m
2026-04-12 SWA813 - Apr 12, 19:51 UTCApr 12, 20:42 UTC51m
2026-04-12 SWA2508 - Apr 12, 17:38 UTCApr 12, 18:48 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 N8900L page for operator, model, and routing details .

Mode-S AC47B7 frequently asked

What is Mode-S code AC47B7?
AC47B7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8900L.
Where is Mode-S AC47B7 registered?
Mode-S code AC47B7 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 AC47B7 broadcasting right now?
Yes. Mode-S AC47B7 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC47B7, octal 53043667, decimal 11,290,551.
What flights does AC47B7 operate?
Mode-S AC47B7 has broadcast 7 distinct callsigns, including SWA3936, SWA3378, SWA1557, SWA813, SWA667.