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sensors Mode-S transponder

ABC4D8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8578Q · BOEING 737-800 · operated by BANK OF UTAH TRUSTEE

Hex
ABC4D8
Octal
52742330
Decimal
11,257,048
Country
US
Tail
N8578Q
Type
B738
Broadcasting now · callsign SWA185 · 33,000 ft
Flights observed
663
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

ABC4D8 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ABC4D8 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
SWA557 Southwest Airlines 5 2026-06-01
SWA446 - 5 2026-06-19
SWA2111 - 5 2026-06-27
SWA930 - 4 2026-07-02
SWA4101 Southwest Airlines 4 2026-04-16
SWA3617 - 4 2026-06-26
SWA3579 Southwest Airlines 4 2026-04-15
SWA3483 Southwest Airlines 4 2026-04-17
SWA2161 Southwest Airlines 4 2026-04-17
SWA1519 Southwest Airlines 4 2026-04-14
SWA680 Southwest Airlines 3 2026-06-06
SWA647 Southwest Airlines 3 2026-06-27
SWA614 - 3 2026-07-13
SWA4194 Southwest Airlines 3 2026-05-18
SWA406 Southwest Airlines 3 2026-05-18
SWA4003 - 3 2026-06-30
SWA3988 - 3 2026-06-23
SWA3582 Southwest Airlines 3 2026-06-12
SWA3404 Southwest Airlines 3 2026-05-05
SWA3042 - 3 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA1146 - Jul 14, 15:25 UTCJul 14, 16:00 UTC35m
2026-07-14 SWA1146 - Jul 14, 11:35 UTCJul 14, 14:00 UTC2h 25m
2026-07-14 SWA2231 DAL → SAT Jul 14, 03:20 UTCJul 14, 04:05 UTC45m
2026-07-13 SWA1404 SEA → DAL Jul 13, 23:00 UTCJul 14, 02:20 UTC3h 20m
2026-07-13 SWA4130 DEN → SEA Jul 13, 18:55 UTCJul 13, 21:10 UTC2h 15m
2026-07-13 SWA3042 OAK → DEN Jul 13, 15:27 UTCJul 13, 17:38 UTC2h 11m
2026-07-13 SWA3042 OAK → DEN Jul 13, 15:30 UTCJul 13, 17:45 UTC2h 15m
2026-07-13 SWA3042 - Jul 13, 13:20 UTCJul 13, 14:10 UTC50m
2026-07-13 SWA614 - Jul 13, 07:05 UTCJul 13, 08:10 UTC1h 5m
2026-07-13 SWA614 - Jul 13, 04:25 UTCJul 13, 06:10 UTC1h 45m
2026-07-12 SWA614 - Jul 12, 22:15 UTCJul 13, 02:20 UTC4h 5m
2026-07-12 SWA2998 - Jul 12, 20:01 UTCJul 12, 20:55 UTC55m
2026-07-12 SWA2650 AUS → MSY Jul 12, 17:10 UTCJul 12, 18:15 UTC1h 5m
2026-07-12 SWA2724 - Jul 12, 15:01 UTCJul 12, 15:55 UTC55m
2026-07-12 SWA2724 TUL → AUS Jul 12, 14:55 UTCJul 12, 15:54 UTC59m
2026-07-12 SWA1910 - Jul 12, 12:50 UTCJul 12, 13:50 UTC1h 0m
2026-07-12 SWA3611 - Jul 12, 02:20 UTCJul 12, 04:30 UTC2h 10m
2026-07-12 SWA3611 - Jul 12, 00:10 UTCJul 12, 01:25 UTC1h 15m
2026-07-11 SWA1511 - Jul 11, 21:20 UTCJul 11, 22:30 UTC1h 10m
2026-07-11 SWA3761 - Jul 11, 17:50 UTCJul 11, 20:20 UTC2h 30m
2026-07-11 SWA1385 SAN → HOU Jul 11, 13:44 UTCJul 11, 16:33 UTC2h 50m
2026-07-11 SWA1385 - Jul 11, 13:45 UTCJul 11, 16:50 UTC3h 5m
2026-07-11 SWA2884 - Jul 11, 03:05 UTCJul 11, 07:00 UTC3h 55m
2026-07-11 SWA3766 - Jul 11, 00:05 UTCJul 11, 01:40 UTC1h 35m
2026-07-10 SWA183 - Jul 10, 22:05 UTCJul 10, 22:55 UTC50m
2026-07-10 SWA183 - Jul 10, 20:00 UTCJul 10, 21:15 UTC1h 15m
2026-07-10 SWA651 - Jul 10, 16:55 UTCJul 10, 18:50 UTC1h 55m
2026-07-10 SWA4319 HRL → DAL Jul 10, 13:55 UTCJul 10, 15:40 UTC1h 45m
2026-07-10 SWA4319 HRL → DAL Jul 10, 13:54 UTCJul 10, 15:45 UTC1h 51m
2026-07-10 SWA1791 - Jul 10, 11:25 UTCJul 10, 12:30 UTC1h 5m
2026-07-10 SWA4340 LAS → ELP Jul 10, 05:50 UTCJul 10, 07:05 UTC1h 15m
2026-07-10 SWA4340 - Jul 10, 05:50 UTCJul 10, 06:50 UTC1h 0m
2026-07-10 SWA330 AUS → LAS Jul 10, 02:25 UTCJul 10, 04:40 UTC2h 15m
2026-07-09 SWA2183 LAS → AUS Jul 9, 22:50 UTCJul 10, 01:10 UTC2h 20m
2026-07-09 SWA2183 - Jul 9, 20:45 UTCJul 9, 21:40 UTC55m
2026-07-09 SWA4648 - Jul 9, 15:15 UTCJul 9, 19:00 UTC3h 45m
2026-07-09 SWA3432 RDU → MDW Jul 9, 12:15 UTCJul 9, 13:45 UTC1h 30m
2026-07-09 SWA1692 DEN → RDU Jul 9, 04:45 UTCJul 9, 07:50 UTC3h 5m
2026-07-08 SWA2769 - Jul 8, 23:45 UTCJul 9, 02:10 UTC2h 25m
2026-07-08 SWA2769 MDW → DEN Jul 8, 23:42 UTCJul 9, 02:08 UTC2h 27m
2026-07-08 SWA1199 - Jul 8, 19:45 UTCJul 8, 20:30 UTC45m
2026-07-08 SWA2656 - Jul 8, 17:50 UTCJul 8, 18:35 UTC45m
2026-07-08 SWA3669 PDX → MDW Jul 8, 13:15 UTCJul 8, 16:45 UTC3h 30m
2026-07-08 SWA4770 PHX → PDX Jul 8, 05:30 UTCJul 8, 07:45 UTC2h 15m
2026-07-08 SWA2314 LAS → PHX Jul 8, 03:55 UTCJul 8, 04:35 UTC40m
2026-07-08 SWA2213 - Jul 8, 02:25 UTCJul 8, 03:10 UTC45m
2026-07-07 SWA2846 SYR → BWI Jul 7, 21:55 UTCJul 8, 01:25 UTC3h 30m
2026-07-07 SWA320 BOS → MDW Jul 7, 18:15 UTCJul 7, 20:20 UTC2h 5m
2026-07-07 SWA320 BOS → MDW Jul 7, 18:15 UTCJul 7, 20:20 UTC2h 5m
2026-07-07 SWA4291 - Jul 7, 13:35 UTCJul 7, 17:05 UTC3h 30m

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 N8578Q page for operator, model, and routing details .

Mode-S ABC4D8 frequently asked

What is Mode-S code ABC4D8?
ABC4D8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8578Q.
Where is Mode-S ABC4D8 registered?
Mode-S code ABC4D8 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 ABC4D8 broadcasting right now?
Yes. Mode-S ABC4D8 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABC4D8, octal 52742330, decimal 11,257,048.
What flights does ABC4D8 operate?
Mode-S ABC4D8 has broadcast 20 distinct callsigns, including SWA557, SWA446, SWA2111, SWA930, SWA4101.