Apparatus

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sensors Mode-S transponder

AC0818

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8744B · BOEING 737 MAX 8 · operated by UMB BANK NA TRUSTEE

Hex
AC0818
Octal
53004030
Decimal
11,274,264
Country
US
Tail
N8744B
Type
B38M
No current signal · last broadcast 57m ago
Flights observed
555
Distinct callsigns
20
Country
US
Last broadcast
57m ago

Last known position

Most recent position reported by Mode-S AC0818.

Country allocation

The ICAO 24-bit address AC0818 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
SWA1890 Southwest Airlines 8 2026-06-04
SWA386 - 5 2026-06-30
SWA2257 Southwest Airlines 5 2026-04-18
SWA346 Southwest Airlines 4 2026-06-11
SWA3254 - 4 2026-07-07
SWA3150 - 4 2026-06-29
SWA307 - 4 2026-06-29
SWA1881 Southwest Airlines 4 2026-05-26
SWA1713 - 4 2026-07-09
SWA1705 Southwest Airlines 4 2026-06-04
SWA1581 Southwest Airlines 4 2026-05-20
SWA1492 Southwest Airlines 4 2026-06-13
SWA1457 Southwest Airlines 4 2026-06-26
SWA981 - 3 2026-06-29
SWA924 Southwest Airlines 3 2026-06-10
SWA884 Southwest Airlines 3 2026-06-07
SWA808 Southwest Airlines 3 2026-05-30
SWA777 Southwest Airlines 3 2026-05-12
SWA567 Southwest Airlines 3 2026-07-05
SWA4009 Southwest Airlines 3 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SWA3451 - Jul 13, 23:55 UTCJul 14, 01:45 UTC1h 50m
2026-07-13 SWA3271 - Jul 13, 20:30 UTCJul 13, 22:45 UTC2h 15m
2026-07-13 SWA3271 IND → MCO Jul 13, 20:28 UTCJul 13, 22:39 UTC2h 11m
2026-07-13 SWA4721 - Jul 13, 17:25 UTCJul 13, 19:20 UTC1h 55m
2026-07-13 SWA4721 MCO → IND Jul 13, 17:22 UTCJul 13, 19:14 UTC1h 52m
2026-07-13 SWA4712 BNA → MCO Jul 13, 14:30 UTCJul 13, 16:00 UTC1h 30m
2026-07-13 SWA4712 BNA → MCO Jul 13, 14:31 UTCJul 13, 15:56 UTC1h 26m
2026-07-13 SWA550 MCO → BNA Jul 13, 11:50 UTCJul 13, 13:25 UTC1h 35m
2026-07-13 SWA4874 - Jul 13, 05:15 UTCJul 13, 09:40 UTC4h 25m
2026-07-12 SWA749 BOS → SAN Jul 12, 20:50 UTCJul 13, 02:05 UTC5h 15m
2026-07-12 SWA1498 - Jul 12, 17:25 UTCJul 12, 19:15 UTC1h 50m
2026-07-12 SWA4398 - Jul 12, 12:25 UTCJul 12, 16:01 UTC3h 35m
2026-07-12 SWA1330 - Jul 12, 03:20 UTCJul 12, 05:55 UTC2h 35m
2026-07-12 SWA1330 DAL → LAX Jul 12, 03:16 UTCJul 12, 05:51 UTC2h 35m
2026-07-11 SWA3218 - Jul 11, 23:05 UTCJul 12, 02:01 UTC2h 55m
2026-07-11 SWA3218 PHL → PHL Jul 11, 22:35 UTCJul 11, 22:45 UTC10m
2026-07-11 SWA4351 - Jul 11, 19:30 UTCJul 11, 20:00 UTC30m
2026-07-11 SWA4351 MDW → PHL Jul 11, 19:30 UTCJul 11, 20:58 UTC1h 28m
2026-07-11 SWA2125 - Jul 11, 16:50 UTCJul 11, 18:00 UTC1h 10m
2026-07-11 SWA2125 BUF → MDW Jul 11, 16:46 UTCJul 11, 18:01 UTC1h 15m
2026-07-11 SWA2125 - Jul 11, 15:05 UTCJul 11, 15:50 UTC45m
2026-07-11 SWA3463 RSW → BWI Jul 11, 11:35 UTCJul 11, 13:35 UTC2h 0m
2026-07-11 SWA2881 MDW → RSW Jul 11, 00:10 UTCJul 11, 02:30 UTC2h 20m
2026-07-10 SWA2953 - Jul 10, 22:45 UTCJul 10, 23:10 UTC25m
2026-07-10 SWA2953 MKE → MDW Jul 10, 22:44 UTCJul 10, 23:12 UTC28m
2026-07-10 SWA4974 - Jul 10, 20:55 UTCJul 10, 21:55 UTC1h 0m
2026-07-10 SWA4974 MCI → MKE Jul 10, 20:50 UTCJul 10, 21:52 UTC1h 2m
2026-07-10 SWA3290 - Jul 10, 17:45 UTCJul 10, 19:55 UTC2h 10m
2026-07-10 SWA3290 PHX → MCI Jul 10, 17:45 UTCJul 10, 19:52 UTC2h 7m
2026-07-10 SWA3290 - Jul 10, 15:50 UTCJul 10, 16:40 UTC50m
2026-07-10 SWA3707 - Jul 10, 13:40 UTCJul 10, 14:35 UTC55m
2026-07-10 SWA3337 PHX → SJC Jul 10, 03:38 UTCJul 10, 05:03 UTC1h 25m
2026-07-10 SWA3337 PHX → SJC Jul 10, 03:40 UTCJul 10, 05:05 UTC1h 25m
2026-07-10 SWA878 OAK → PHX Jul 10, 00:30 UTCJul 10, 01:59 UTC1h 29m
2026-07-10 SWA878 OAK → PHX Jul 10, 00:35 UTCJul 10, 02:00 UTC1h 25m
2026-07-09 SWA1713 - Jul 9, 18:00 UTCJul 9, 19:35 UTC1h 35m
2026-07-09 SWA1713 DEN → SEA Jul 9, 14:10 UTCJul 9, 16:35 UTC2h 25m
2026-07-09 SWA2545 - Jul 9, 11:25 UTCJul 9, 12:40 UTC1h 15m
2026-07-09 SWA2545 MCI → DEN Jul 9, 11:20 UTCJul 9, 12:39 UTC1h 19m
2026-07-09 SWA1482 - Jul 9, 02:45 UTCJul 9, 03:40 UTC55m
2026-07-08 SWA768 - Jul 8, 23:50 UTCJul 9, 01:00 UTC1h 10m
2026-07-08 SWA768 BUF → MDW Jul 8, 23:47 UTCJul 9, 00:59 UTC1h 13m
2026-07-08 SWA2259 DEN → BUF Jul 8, 19:40 UTCJul 8, 22:20 UTC2h 40m
2026-07-08 SWA4312 - Jul 8, 16:40 UTCJul 8, 18:25 UTC1h 45m
2026-07-08 SWA4900 - Jul 8, 12:20 UTCJul 8, 15:30 UTC3h 10m
2026-07-08 SWA4556 - Jul 8, 03:10 UTCJul 8, 06:25 UTC3h 15m
2026-07-07 SWA3353 PHX → STL Jul 7, 20:55 UTCJul 7, 23:35 UTC2h 40m
2026-07-07 SWA1381 - Jul 7, 17:45 UTCJul 7, 19:40 UTC1h 55m
2026-07-07 SWA3254 PHX → DAL Jul 7, 14:30 UTCJul 7, 16:30 UTC2h 0m
2026-07-07 SWA3254 PHX → DAL Jul 7, 14:27 UTCJul 7, 16:24 UTC1h 57m

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 N8744B page for operator, model, and routing details .

Mode-S AC0818 frequently asked

What is Mode-S code AC0818?
AC0818 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8744B.
Where is Mode-S AC0818 registered?
Mode-S code AC0818 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 AC0818 broadcasting right now?
No active broadcast right now. Last signal was 57m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC0818, octal 53004030, decimal 11,274,264.
What flights does AC0818 operate?
Mode-S AC0818 has broadcast 20 distinct callsigns, including SWA1890, SWA386, SWA2257, SWA346, SWA3254.