Apparatus

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sensors Mode-S transponder

ABD254

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8608N · BOEING 737-800 · operated by UMB BANK NA TRUSTEE

Hex
ABD254
Octal
52751124
Decimal
11,260,500
Country
US
Tail
N8608N
Type
B738
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
740
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S ABD254.

Country allocation

The ICAO 24-bit address ABD254 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
SWA1257 Southwest Airlines 6 2026-04-18
SWA2953 Southwest Airlines 5 2026-04-28
SWA897 - 4 2026-07-14
SWA3780 Southwest Airlines 4 2026-04-14
SWA3684 Southwest Airlines 4 2026-04-28
SWA3400 Southwest Airlines 4 2026-06-03
SWA2610 - 4 2026-07-12
SWA1901 Southwest Airlines 4 2026-04-27
SWA1048 - 4 2026-07-19
SWA761 Southwest Airlines 3 2026-06-20
SWA754 Southwest Airlines 3 2026-05-10
SWA736 - 3 2026-07-01
SWA4842 Southwest Airlines 3 2026-07-26
SWA4684 Southwest Airlines 3 2026-06-06
SWA462 Southwest Airlines 3 2026-04-13
SWA460 - 3 2026-07-17
SWA4542 - 3 2026-04-13
SWA4512 Southwest Airlines 3 2026-07-23
SWA4403 - 3 2026-06-25
SWA4384 Southwest Airlines 3 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA972 MDW → MSP Jul 26, 20:40 UTCJul 26, 23:00 UTC2h 20m
2026-07-26 SWA4842 FLL → IND Jul 26, 17:15 UTCJul 26, 19:00 UTC1h 45m
2026-07-26 SWA4842 FLL → IND Jul 26, 17:12 UTCJul 26, 19:06 UTC1h 54m
2026-07-26 SWA1187 SFO → LAS Jul 26, 14:20 UTCJul 26, 16:10 UTC1h 50m
2026-07-26 SWA1187 SFO → LAS Jul 26, 14:17 UTCJul 26, 16:11 UTC1h 54m
2026-07-26 SWA4146 CHS → DEN Jul 26, 10:55 UTCJul 26, 13:10 UTC2h 15m
2026-07-26 SWA3477 ATL → MSY Jul 26, 01:26 UTCJul 26, 04:01 UTC2h 35m
2026-07-26 SWA3477 ATL → MSY Jul 26, 01:30 UTCJul 26, 04:05 UTC2h 35m
2026-07-25 SWA1544 KOA → OAK Jul 25, 21:40 UTCJul 26, 00:05 UTC2h 25m
2026-07-25 SWA1544 KOA → OAK Jul 25, 21:39 UTCJul 26, 00:03 UTC2h 24m
2026-07-25 SWA4751 MDW → BWI Jul 25, 17:55 UTCJul 25, 20:35 UTC2h 40m
2026-07-25 SWA3074 BOS → BWI Jul 25, 15:35 UTCJul 25, 16:50 UTC1h 15m
2026-07-25 SWA3074 BOS → BWI Jul 25, 15:34 UTCJul 25, 16:44 UTC1h 11m
2026-07-25 SWA4418 SAN → OAK Jul 25, 13:20 UTCJul 25, 14:20 UTC1h 0m
2026-07-25 SWA4418 SAN → OAK Jul 25, 13:17 UTCJul 25, 14:14 UTC57m
2026-07-25 SWA102 DEN → ORD Jul 25, 05:00 UTCJul 25, 07:10 UTC2h 10m
2026-07-25 SWA102 DEN → ORD Jul 25, 04:55 UTCJul 25, 07:06 UTC2h 11m
2026-07-25 SWA3208 BUR → PHX Jul 25, 01:20 UTCJul 25, 03:20 UTC2h 0m
2026-07-25 SWA3208 BUR → PHX Jul 25, 01:15 UTCJul 25, 03:16 UTC2h 1m
2026-07-24 SWA3208 BUR → PHX Jul 24, 21:50 UTCJul 25, 00:15 UTC2h 25m
2026-07-24 SWA4271 HDN → BNA Jul 24, 18:25 UTCJul 24, 20:45 UTC2h 20m
2026-07-24 SWA2654 - Jul 24, 15:05 UTCJul 24, 17:10 UTC2h 5m
2026-07-24 SWA2654 MCO → MDW Jul 24, 11:45 UTCJul 24, 14:00 UTC2h 15m
2026-07-24 SWA3950 DCA → STL Jul 24, 01:00 UTCJul 24, 02:50 UTC1h 50m
2026-07-24 SWA3950 DCA → STL Jul 24, 00:59 UTCJul 24, 02:44 UTC1h 45m
2026-07-23 SWA2974 AUS → OAK Jul 23, 23:05 UTCJul 24, 00:10 UTC1h 5m
2026-07-23 SWA2832 BOS → MDW Jul 23, 20:55 UTCJul 23, 22:00 UTC1h 5m
2026-07-23 SWA2832 BOS → MDW Jul 23, 20:52 UTCJul 23, 21:52 UTC1h 0m
2026-07-23 SWA746 LGA → MCI Jul 23, 17:45 UTCJul 23, 19:50 UTC2h 5m
2026-07-23 SWA4291 TUL → PHX Jul 23, 13:10 UTCJul 23, 16:25 UTC3h 15m
2026-07-23 SWA4512 LAS → PSP Jul 23, 10:50 UTCJul 23, 11:40 UTC50m
2026-07-22 SWA614 DEN → AUS Jul 22, 23:40 UTCJul 23, 02:40 UTC3h 0m
2026-07-22 SWA614 DEN → AUS Jul 22, 23:35 UTCJul 23, 02:31 UTC2h 56m
2026-07-22 SWA1982 - Jul 22, 18:05 UTCJul 22, 22:10 UTC4h 5m
2026-07-22 SWA347 - Jul 22, 13:30 UTCJul 22, 16:40 UTC3h 10m
2026-07-22 SWA347 - Jul 22, 11:25 UTCJul 22, 12:00 UTC35m
2026-07-21 SWA4207 AUS → MSY Jul 21, 18:55 UTCJul 21, 20:05 UTC1h 10m
2026-07-21 SWA3255 OAK → BUR Jul 21, 15:05 UTCJul 21, 17:50 UTC2h 45m
2026-07-21 SWA3255 OAK → BUR Jul 21, 15:03 UTCJul 21, 17:45 UTC2h 42m
2026-07-21 SWA846 - Jul 21, 13:10 UTCJul 21, 14:05 UTC55m
2026-07-21 SWA846 MDW → PIT Jul 21, 13:05 UTCJul 21, 14:04 UTC59m
2026-07-21 SWA263 MCI → LGA Jul 21, 10:05 UTCJul 21, 11:35 UTC1h 30m
2026-07-21 SWA4559 - Jul 21, 04:00 UTCJul 21, 04:25 UTC25m
2026-07-21 SWA1168 BWI → ALB Jul 21, 02:15 UTCJul 21, 03:10 UTC55m
2026-07-20 SWA4299 - Jul 20, 23:05 UTCJul 21, 01:15 UTC2h 9m
2026-07-20 SWA4299 - Jul 20, 21:15 UTCJul 20, 22:05 UTC50m
2026-07-20 SWA1400 BNA → TPA Jul 20, 19:25 UTCJul 20, 20:05 UTC40m
2026-07-20 SWA1400 BNA → TPA Jul 20, 19:20 UTCJul 20, 20:02 UTC42m
2026-07-20 SWA4751 - Jul 20, 15:45 UTCJul 20, 18:25 UTC2h 40m
2026-07-20 SWA3545 - Jul 20, 11:35 UTCJul 20, 13:55 UTC2h 20m

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 N8608N page for operator, model, and routing details .

Mode-S ABD254 frequently asked

What is Mode-S code ABD254?
ABD254 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8608N.
Where is Mode-S ABD254 registered?
Mode-S code ABD254 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 ABD254 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABD254, octal 52751124, decimal 11,260,500.
What flights does ABD254 operate?
Mode-S ABD254 has broadcast 20 distinct callsigns, including SWA1257, SWA2953, SWA897, SWA3780, SWA3684.