Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AC250B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8818Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC250B
Octal
53022413
Decimal
11,281,675
Country
US
Tail
N8818Q
Type
B38M
Broadcasting now · callsign SWA1329 · 32,775 ft
Flights observed
672
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

AC250B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC250B 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
SWA869 Southwest Airlines 6 2026-04-17
SWA935 Southwest Airlines 5 2026-04-13
SWA451 - 4 2026-06-21
SWA3890 - 4 2026-07-02
SWA365 - 4 2026-06-27
SWA3575 Southwest Airlines 4 2026-06-19
SWA3521 Southwest Airlines 4 2026-05-18
SWA3217 - 4 2026-06-26
SWA2876 - 4 2026-07-11
SWA2499 - 4 2026-06-27
SWA943 Southwest Airlines 3 2026-05-20
SWA732 Southwest Airlines 3 2026-04-20
SWA724 Southwest Airlines 3 2026-07-04
SWA699 Southwest Airlines 3 2026-04-20
SWA680 - 3 2026-06-13
SWA4748 Southwest Airlines 3 2026-06-19
SWA4195 Southwest Airlines 3 2026-04-15
SWA3918 - 3 2026-06-27
SWA3813 - 3 2026-07-09
SWA3740 Southwest Airlines 3 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA1329 - Jul 14, 02:05 UTCJul 14, 02:45 UTC40m
2026-07-14 SWA1329 - Jul 14, 00:00 UTCJul 14, 01:20 UTC1h 20m
2026-07-13 SWA932 - Jul 13, 22:10 UTCJul 13, 22:55 UTC45m
2026-07-13 SWA932 - Jul 13, 18:30 UTCJul 13, 21:00 UTC2h 30m
2026-07-13 SWA1695 - Jul 13, 16:20 UTCJul 13, 17:15 UTC55m
2026-07-13 SWA1695 - Jul 13, 13:30 UTCJul 13, 15:05 UTC1h 35m
2026-07-13 SWA4961 - Jul 13, 10:20 UTCJul 13, 10:45 UTC25m
2026-07-13 SWA4961 AUS → MDW Jul 13, 10:19 UTCJul 13, 12:30 UTC2h 11m
2026-07-13 SWA775 - Jul 13, 03:15 UTCJul 13, 05:15 UTC2h 0m
2026-07-13 SWA1782 - Jul 13, 01:30 UTCJul 13, 02:10 UTC40m
2026-07-12 SWA1782 LAS → DTW Jul 12, 20:40 UTCJul 13, 00:15 UTC3h 35m
2026-07-12 SWA1149 - Jul 12, 16:20 UTCJul 12, 18:55 UTC2h 35m
2026-07-12 SWA4807 SAN → MCI Jul 12, 01:31 UTCJul 12, 04:21 UTC2h 50m
2026-07-12 SWA4807 - Jul 12, 01:35 UTCJul 12, 02:45 UTC1h 10m
2026-07-11 SWA2876 - Jul 11, 22:55 UTCJul 12, 00:10 UTC1h 15m
2026-07-11 SWA2876 RNO → SAN Jul 11, 22:52 UTCJul 12, 00:07 UTC1h 15m
2026-07-11 SWA2876 - Jul 11, 17:40 UTCJul 11, 20:40 UTC3h 0m
2026-07-11 SWA2876 MSP → MDW Jul 11, 15:30 UTCJul 11, 16:35 UTC1h 5m
2026-07-11 SWA1579 - Jul 11, 13:35 UTCJul 11, 14:30 UTC55m
2026-07-11 SWA995 - Jul 11, 10:30 UTCJul 11, 12:05 UTC1h 35m
2026-07-11 SWA1499 - Jul 11, 04:50 UTCJul 11, 07:45 UTC2h 55m
2026-07-11 SWA2176 ABQ → DEN Jul 11, 02:25 UTCJul 11, 03:25 UTC1h 0m
2026-07-10 SWA2176 - Jul 10, 20:45 UTCJul 11, 00:15 UTC3h 30m
2026-07-10 SWA2176 - Jul 10, 18:40 UTCJul 10, 19:40 UTC1h 0m
2026-07-10 SWA3182 - Jul 10, 15:50 UTCJul 10, 17:15 UTC1h 25m
2026-07-10 SWA1661 - Jul 10, 13:05 UTCJul 10, 14:40 UTC1h 35m
2026-07-10 SWA1661 MDW → ORF Jul 10, 13:02 UTCJul 10, 14:38 UTC1h 36m
2026-07-10 SWA4276 - Jul 10, 10:40 UTCJul 10, 11:40 UTC1h 0m
2026-07-10 SWA2408 - Jul 10, 04:30 UTCJul 10, 06:45 UTC2h 15m
2026-07-10 SWA2408 LAX → MCI Jul 10, 04:29 UTCJul 10, 07:18 UTC2h 49m
2026-07-10 SWA3680 - Jul 10, 02:40 UTCJul 10, 03:30 UTC50m
2026-07-10 SWA3680 SJC → LAX Jul 10, 02:36 UTCJul 10, 03:28 UTC52m
2026-07-09 SWA674 - Jul 9, 21:20 UTCJul 10, 01:30 UTC4h 10m
2026-07-09 SWA3362 PIT → BNA Jul 9, 18:50 UTCJul 9, 20:10 UTC1h 20m
2026-07-09 SWA3362 PIT → BNA Jul 9, 18:50 UTCJul 9, 20:02 UTC1h 12m
2026-07-09 SWA2684 - Jul 9, 15:20 UTCJul 9, 17:10 UTC1h 50m
2026-07-09 SWA2816 - Jul 9, 12:05 UTCJul 9, 14:15 UTC2h 10m
2026-07-09 SWA3886 - Jul 9, 06:25 UTCJul 9, 09:55 UTC3h 30m
2026-07-09 SWA3102 PDX → SJC Jul 9, 03:35 UTCJul 9, 04:55 UTC1h 20m
2026-07-09 SWA3813 SMF → PDX Jul 9, 01:30 UTCJul 9, 02:35 UTC1h 5m
2026-07-08 SWA1354 CVG → MCO Jul 8, 21:05 UTCJul 9, 00:20 UTC3h 15m
2026-07-08 SWA351 - Jul 8, 18:30 UTCJul 8, 19:35 UTC1h 5m
2026-07-08 SWA579 - Jul 8, 15:05 UTCJul 8, 16:55 UTC1h 50m
2026-07-08 SWA579 - Jul 8, 13:10 UTCJul 8, 13:45 UTC35m
2026-07-08 SWA4581 BNA → BOS Jul 8, 10:55 UTCJul 8, 12:00 UTC1h 5m
2026-07-08 SWA942 - Jul 8, 01:40 UTCJul 8, 02:45 UTC1h 5m
2026-07-08 SWA942 BWI → DTW Jul 8, 01:39 UTCJul 8, 02:45 UTC1h 7m
2026-07-07 SWA1527 PPM → BWI Jul 7, 22:20 UTCJul 8, 00:20 UTC2h 0m
2026-07-07 SWA833 DTW → BNA Jul 7, 18:25 UTCJul 7, 21:05 UTC2h 40m
2026-07-07 SWA833 DTW → BNA Jul 7, 18:22 UTCJul 7, 21:05 UTC2h 43m

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 N8818Q page for operator, model, and routing details .

Mode-S AC250B frequently asked

What is Mode-S code AC250B?
AC250B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8818Q.
Where is Mode-S AC250B registered?
Mode-S code AC250B 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 AC250B broadcasting right now?
Yes. Mode-S AC250B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC250B, octal 53022413, decimal 11,281,675.
What flights does AC250B operate?
Mode-S AC250B has broadcast 20 distinct callsigns, including SWA869, SWA935, SWA451, SWA3890, SWA365.