Apparatus

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sensors Mode-S transponder

AC16BB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8782Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC16BB
Octal
53013273
Decimal
11,278,011
Country
US
Tail
N8782Q
Type
B38M
Broadcasting now · callsign SWA4519 · 37,000 ft
Flights observed
688
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Current position

AC16BB is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC16BB 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 20 distinct

Callsign Airline Flights Last seen
SWA1940 - 6 2026-07-14
SWA456 - 5 2026-07-21
SWA4338 Southwest Airlines 5 2026-06-08
SWA2240 - 5 2026-07-03
SWA1942 Southwest Airlines 5 2026-07-22
SWA1921 Southwest Airlines 5 2026-06-29
SWA900 - 4 2026-07-12
SWA3397 - 4 2026-07-16
SWA2914 Southwest Airlines 4 2026-06-03
SWA2339 Southwest Airlines 4 2026-04-18
SWA2332 Southwest Airlines 4 2026-05-15
SWA2271 - 4 2026-06-26
SWA2170 - 4 2026-07-14
SWA2167 Southwest Airlines 4 2026-06-29
SWA1911 - 4 2026-07-14
SWA1581 Southwest Airlines 4 2026-05-19
SWA1518 Southwest Airlines 4 2026-07-26
SWA857 Southwest Airlines 3 2026-05-23
SWA648 - 3 2026-07-13
SWA597 Southwest Airlines 3 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1407 PHX → SFO Jul 26, 19:30 UTCJul 26, 22:25 UTC2h 55m
2026-07-26 SWA1518 STL → PHX Jul 26, 16:35 UTCJul 26, 18:05 UTC1h 30m
2026-07-26 SWA1518 STL → PHX Jul 26, 16:35 UTCJul 26, 18:10 UTC1h 35m
2026-07-26 SWA3640 TPA → BUF Jul 26, 12:40 UTCJul 26, 14:40 UTC2h 0m
2026-07-26 SWA3812 STL → ICT Jul 26, 05:40 UTCJul 26, 07:10 UTC1h 31m
2026-07-25 SWA2681 MDW → LGA Jul 25, 23:40 UTCJul 26, 03:40 UTC4h 0m
2026-07-25 SWA2566 BNA → LGA Jul 25, 19:50 UTCJul 25, 22:05 UTC2h 15m
2026-07-25 SWA145 - Jul 25, 15:00 UTCJul 25, 17:40 UTC2h 40m
2026-07-25 SWA751 MCI → CUN Jul 25, 10:50 UTCJul 25, 13:35 UTC2h 45m
2026-07-25 SWA563 LAS → DAL Jul 25, 04:10 UTCJul 25, 05:30 UTC1h 20m
2026-07-25 SWA2157 ONT → SJC Jul 25, 01:05 UTCJul 25, 02:20 UTC1h 15m
2026-07-24 SWA971 SJC → PDX Jul 24, 22:20 UTCJul 24, 23:55 UTC1h 35m
2026-07-24 SWA971 SJC → PDX Jul 24, 22:15 UTCJul 24, 23:50 UTC1h 35m
2026-07-24 SWA1608 CUN → BWI Jul 24, 17:05 UTCJul 24, 20:05 UTC3h 0m
2026-07-24 SWA317 HOU → CUN Jul 24, 13:45 UTCJul 24, 14:15 UTC30m
2026-07-24 SWA317 HOU → CUN Jul 24, 13:40 UTCJul 24, 15:29 UTC1h 49m
2026-07-24 SWA301 SJC → LAS Jul 24, 10:50 UTCJul 24, 11:20 UTC30m
2026-07-24 SWA1793 SNA → DEN Jul 24, 03:50 UTCJul 24, 05:03 UTC1h 13m
2026-07-24 SWA1793 SNA → DEN Jul 24, 02:15 UTCJul 24, 05:10 UTC2h 55m
2026-07-23 SWA180 CUN → PHX Jul 23, 20:25 UTCJul 24, 00:00 UTC3h 35m
2026-07-23 SWA1995 STL → CUN Jul 23, 16:01 UTCJul 23, 18:35 UTC2h 34m
2026-07-23 SWA1995 STL → CUN Jul 23, 16:05 UTCJul 23, 18:40 UTC2h 35m
2026-07-23 SWA3352 DEN → STL Jul 23, 12:10 UTCJul 23, 14:40 UTC2h 30m
2026-07-22 SWA180 - Jul 22, 22:05 UTCJul 22, 22:30 UTC25m
2026-07-22 SWA180 CUN → PHX Jul 22, 22:00 UTCJul 23, 01:33 UTC3h 33m
2026-07-22 SWA131 DEN → CUN Jul 22, 16:53 UTCJul 22, 20:30 UTC3h 37m
2026-07-22 SWA131 DEN → CUN Jul 22, 16:55 UTCJul 22, 20:35 UTC3h 40m
2026-07-22 SWA2045 BNA → ISP Jul 22, 03:05 UTCJul 22, 05:00 UTC1h 55m
2026-07-22 SWA1942 MDW → MCO Jul 22, 01:10 UTCJul 22, 02:00 UTC50m
2026-07-21 SWA1942 MDW → MCO Jul 21, 21:35 UTCJul 21, 21:50 UTC15m
2026-07-21 SWA1942 MDW → MCO Jul 21, 21:30 UTCJul 22, 01:56 UTC4h 26m
2026-07-21 SWA456 - Jul 21, 14:15 UTCJul 21, 19:55 UTC5h 40m
2026-07-21 SWA4934 BUR → OAK Jul 21, 02:35 UTCJul 21, 03:40 UTC1h 5m
2026-07-21 SWA4934 BUR → OAK Jul 21, 02:40 UTCJul 21, 03:40 UTC1h 0m
2026-07-20 SWA2316 - Jul 20, 23:45 UTCJul 21, 00:50 UTC1h 5m
2026-07-20 SWA2316 - Jul 20, 20:10 UTCJul 20, 20:20 UTC10m
2026-07-20 SWA495 - Jul 20, 07:00 UTCJul 20, 07:25 UTC25m
2026-07-20 SWA2349 - Jul 20, 03:40 UTCJul 20, 03:50 UTC10m
2026-07-20 SWA3096 OGG → HNL Jul 20, 02:15 UTCJul 20, 02:40 UTC25m
2026-07-20 SWA1931 - Jul 20, 00:20 UTCJul 20, 00:40 UTC20m
2026-07-19 SWA3094 - Jul 19, 22:10 UTCJul 19, 22:35 UTC25m
2026-07-19 SWA1851 - Jul 19, 20:20 UTCJul 19, 20:35 UTC15m
2026-07-19 SWA1851 HNL → OGG Jul 19, 20:15 UTCJul 19, 20:39 UTC24m
2026-07-19 SWA1925 - Jul 19, 06:50 UTCJul 19, 07:00 UTC10m
2026-07-18 SWA2397 LAX → MCI Jul 18, 21:30 UTCJul 18, 21:40 UTC10m
2026-07-18 SWA2397 LAX → MCI Jul 18, 16:20 UTCJul 18, 16:50 UTC30m
2026-07-18 SWA2397 LAX → MCI Jul 18, 16:16 UTCJul 18, 21:37 UTC5h 21m
2026-07-18 SWA197 - Jul 18, 10:45 UTCJul 18, 14:20 UTC3h 35m
2026-07-18 SWA4830 MCO → BNA Jul 18, 05:25 UTCJul 18, 06:50 UTC1h 25m
2026-07-18 SWA463 DAL → MCO Jul 18, 02:25 UTCJul 18, 04:35 UTC2h 11m

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 N8782Q page for operator, model, and routing details .

Mode-S AC16BB frequently asked

What is Mode-S code AC16BB?
AC16BB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8782Q.
Where is Mode-S AC16BB registered?
Mode-S code AC16BB 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 AC16BB broadcasting right now?
Yes. Mode-S AC16BB is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC16BB, octal 53013273, decimal 11,278,011.
What flights does AC16BB operate?
Mode-S AC16BB has broadcast 20 distinct callsigns, including SWA1940, SWA456, SWA4338, SWA2240, SWA1942.