Apparatus

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sensors Mode-S transponder

ABC40D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8572X · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABC40D
Octal
52742015
Decimal
11,256,845
Country
US
Tail
N8572X
Type
B738
Broadcasting now · callsign SWA801 · 40,000 ft
Flights observed
760
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Current position

ABC40D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ABC40D 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
SWA1230 - 6 2026-07-05
SWA2561 Southwest Airlines 5 2026-04-29
SWA2030 Southwest Airlines 5 2026-07-22
SWA1718 - 5 2026-04-13
SWA668 - 4 2026-07-14
SWA3973 - 4 2026-07-13
SWA384 - 4 2026-07-18
SWA3461 - 4 2026-04-13
SWA2499 - 4 2026-06-20
SWA2483 Southwest Airlines 4 2026-06-11
SWA2032 Southwest Airlines 4 2026-04-29
SWA1137 - 4 2026-07-16
SWA1132 - 4 2026-07-01
SWA833 Southwest Airlines 3 2026-04-21
SWA752 Southwest Airlines 3 2026-04-28
SWA706 - 3 2026-07-07
SWA472 - 3 2026-07-11
SWA4157 - 3 2026-07-10
SWA4013 - 3 2026-06-15
SWA3966 - 3 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1183 LAS → SFO Jul 26, 21:05 UTCJul 26, 21:15 UTC10m
2026-07-26 SWA1809 LAX → OAK Jul 26, 15:05 UTCJul 26, 18:55 UTC3h 50m
2026-07-26 SWA2996 SAN → OAK Jul 26, 12:00 UTCJul 26, 13:40 UTC1h 40m
2026-07-26 SWA4588 BWI → JAX Jul 26, 01:10 UTCJul 26, 03:00 UTC1h 50m
2026-07-25 SWA3800 BWI → ORF Jul 25, 21:30 UTCJul 25, 23:50 UTC2h 20m
2026-07-25 SWA1088 MSY → LGA Jul 25, 17:55 UTCJul 25, 20:25 UTC2h 30m
2026-07-25 SWA4614 PHX → CVG Jul 25, 15:05 UTCJul 25, 16:40 UTC1h 35m
2026-07-25 SWA4614 PHX → CVG Jul 25, 15:04 UTCJul 25, 16:34 UTC1h 30m
2026-07-25 SWA1889 SJC → SAN Jul 25, 12:15 UTCJul 25, 14:05 UTC1h 50m
2026-07-25 SWA1889 SJC → SAN Jul 25, 12:09 UTCJul 25, 13:55 UTC1h 46m
2026-07-25 SWA4220 DEN → LAS Jul 25, 00:20 UTCJul 25, 01:10 UTC50m
2026-07-25 SWA4220 DEN → LAS Jul 25, 00:15 UTCJul 25, 01:17 UTC1h 2m
2026-07-24 SWA1159 MSY → LAX Jul 24, 22:05 UTCJul 24, 23:05 UTC1h 0m
2026-07-24 SWA1159 MSY → LAX Jul 24, 18:05 UTCJul 24, 21:05 UTC3h 0m
2026-07-24 SWA4332 LAS → DCA Jul 24, 15:50 UTCJul 24, 16:55 UTC1h 5m
2026-07-24 SWA4332 LAS → DCA Jul 24, 15:29 UTCJul 24, 16:50 UTC1h 21m
2026-07-24 SWA4481 SAN → BWI Jul 24, 12:45 UTCJul 24, 14:00 UTC1h 15m
2026-07-24 SWA4771 BOS → BNA Jul 24, 09:15 UTCJul 24, 11:35 UTC2h 20m
2026-07-24 SWA4221 BUR → SJC Jul 24, 00:20 UTCJul 24, 01:45 UTC1h 25m
2026-07-23 SWA3081 SEA → MDW Jul 23, 19:55 UTCJul 23, 23:15 UTC3h 20m
2026-07-23 SWA3081 OAK → SEA Jul 23, 16:25 UTCJul 23, 18:00 UTC1h 35m
2026-07-23 SWA266 BUR → SJC Jul 23, 13:25 UTCJul 23, 15:10 UTC1h 45m
2026-07-23 SWA4196 MCO → DAL Jul 23, 06:15 UTCJul 23, 08:10 UTC1h 55m
2026-07-23 SWA3898 BWI → SJU Jul 23, 04:10 UTCJul 23, 05:10 UTC1h 0m
2026-07-23 SWA3898 BWI → SJU Jul 23, 04:07 UTCJul 23, 05:00 UTC54m
2026-07-23 SWA4875 CMH → MDW Jul 23, 02:10 UTCJul 23, 03:15 UTC1h 5m
2026-07-22 SWA458 SJC → SAN Jul 22, 23:40 UTCJul 23, 00:55 UTC1h 15m
2026-07-22 SWA4950 STL → MIA Jul 22, 21:10 UTCJul 22, 22:10 UTC1h 0m
2026-07-22 SWA4957 BWI → LAX Jul 22, 18:30 UTCJul 22, 19:25 UTC55m
2026-07-22 SWA4957 BWI → LAX Jul 22, 18:27 UTCJul 22, 19:23 UTC57m
2026-07-22 SWA2386 DEN → SFO Jul 22, 15:10 UTCJul 22, 17:15 UTC2h 5m
2026-07-22 SWA2545 PHX → DEN Jul 22, 11:30 UTCJul 22, 12:45 UTC1h 15m
2026-07-22 SWA2030 LAS → OAK Jul 22, 03:00 UTCJul 22, 04:30 UTC1h 30m
2026-07-22 SWA2030 LAS → OAK Jul 22, 02:58 UTCJul 22, 04:26 UTC1h 28m
2026-07-22 SWA2526 - Jul 22, 00:15 UTCJul 22, 01:15 UTC1h 0m
2026-07-22 SWA2526 MAF → HOU Jul 22, 00:10 UTCJul 22, 01:14 UTC1h 4m
2026-07-21 SWA1758 LAX → OAK Jul 21, 22:50 UTCJul 21, 23:35 UTC45m
2026-07-21 SWA1758 LAX → OAK Jul 21, 20:10 UTCJul 21, 21:35 UTC1h 25m
2026-07-21 SWA1485 DEN → BNA Jul 21, 16:40 UTCJul 21, 18:45 UTC2h 5m
2026-07-21 SWA1485 DEN → BNA Jul 21, 16:38 UTCJul 21, 18:38 UTC2h 0m
2026-07-21 SWA1130 OAK → ONT Jul 21, 13:59 UTCJul 21, 15:12 UTC1h 13m
2026-07-21 SWA1505 PHX → OAK Jul 21, 04:35 UTCJul 21, 15:15 UTC10h 40m
2026-07-21 SWA4214 STL → CMH Jul 21, 00:20 UTCJul 21, 03:40 UTC3h 20m
2026-07-20 SWA4209 MDW → IAH Jul 20, 21:25 UTCJul 20, 22:35 UTC1h 10m
2026-07-20 SWA4209 MDW → IAH Jul 20, 21:20 UTCJul 20, 22:35 UTC1h 15m
2026-07-20 SWA4885 - Jul 20, 19:20 UTCJul 20, 20:35 UTC1h 15m
2026-07-20 SWA1094 - Jul 20, 17:10 UTCJul 20, 18:10 UTC1h 0m
2026-07-20 SWA3529 - Jul 20, 15:15 UTCJul 20, 16:10 UTC55m
2026-07-20 SWA3351 DAL → DCA Jul 20, 11:35 UTCJul 20, 14:10 UTC2h 35m
2026-07-20 SWA1794 ELP → DAL Jul 20, 02:37 UTCJul 20, 04:05 UTC1h 28m

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 N8572X page for operator, model, and routing details .

Mode-S ABC40D frequently asked

What is Mode-S code ABC40D?
ABC40D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8572X.
Where is Mode-S ABC40D registered?
Mode-S code ABC40D 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 ABC40D broadcasting right now?
Yes. Mode-S ABC40D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABC40D, octal 52742015, decimal 11,256,845.
What flights does ABC40D operate?
Mode-S ABC40D has broadcast 20 distinct callsigns, including SWA1230, SWA2561, SWA2030, SWA1718, SWA668.