Apparatus

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sensors Mode-S transponder

ABC3EC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8571Z · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABC3EC
Octal
52741754
Decimal
11,256,812
Country
US
Tail
N8571Z
Type
B738
No current signal · last broadcast Jul 23, 17:05 UTC
Flights observed
721
Distinct callsigns
20
Country
US
Last broadcast
Jul 23, 17:05 UTC

Last known position

Most recent position reported by Mode-S ABC3EC.

Country allocation

The ICAO 24-bit address ABC3EC 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
SWA1994 Southwest Airlines 5 2026-05-26
SWA1627 Southwest Airlines 5 2026-04-28
SWA1422 - 5 2026-04-17
SWA1181 - 5 2026-07-03
SWA855 - 4 2026-06-18
SWA694 Southwest Airlines 4 2026-04-14
SWA4841 Southwest Airlines 4 2026-07-01
SWA2861 Southwest Airlines 4 2026-05-22
SWA2513 Southwest Airlines 4 2026-05-06
SWA2339 Southwest Airlines 4 2026-05-22
SWA1782 - 4 2026-06-21
SWA174 Southwest Airlines 4 2026-04-16
SWA1524 - 4 2026-07-15
SWA1346 Southwest Airlines 4 2026-05-08
SWA1171 Southwest Airlines 4 2026-04-17
SWA937 - 3 2026-06-29
SWA812 Southwest Airlines 3 2026-04-16
SWA4478 Southwest Airlines 3 2026-04-20
SWA436 - 3 2026-06-19
SWA4286 Southwest Airlines 3 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 SWA8505 OAK → SFO Jul 23, 16:45 UTCJul 23, 17:05 UTC20m
2026-07-23 SWA8505 OAK → SFO Jul 23, 12:05 UTCJul 23, 14:30 UTC2h 25m
2026-07-23 SWA3697 LAS → LAX Jul 23, 04:25 UTCJul 23, 05:55 UTC1h 30m
2026-07-23 SWA3697 LAS → LAX Jul 23, 04:25 UTCJul 23, 05:51 UTC1h 26m
2026-07-23 SWA2434 LAS → OAK Jul 23, 02:15 UTCJul 23, 03:00 UTC45m
2026-07-22 SWA2096 OAK → LAS Jul 22, 20:20 UTCJul 23, 01:10 UTC4h 50m
2026-07-22 SWA343 SJC → SAN Jul 22, 17:35 UTCJul 22, 18:50 UTC1h 15m
2026-07-22 SWA343 SJC → SAN Jul 22, 17:29 UTCJul 22, 18:54 UTC1h 26m
2026-07-22 SWA1065 MDW → MHT Jul 22, 15:20 UTCJul 22, 16:20 UTC1h 0m
2026-07-22 SWA1031 DEN → OAK Jul 22, 13:05 UTCJul 22, 13:55 UTC50m
2026-07-22 SWA869 BUR → OAK Jul 22, 11:10 UTCJul 22, 11:55 UTC45m
2026-07-22 SWA2745 STL → CLE Jul 22, 03:05 UTCJul 22, 04:30 UTC1h 25m
2026-07-21 SWA3584 BDL → TPA Jul 21, 19:30 UTCJul 21, 21:40 UTC2h 10m
2026-07-21 SWA2499 MDW → BWI Jul 21, 15:55 UTCJul 21, 18:15 UTC2h 20m
2026-07-21 SWA153 MAF → DAL Jul 21, 12:55 UTCJul 21, 14:15 UTC1h 20m
2026-07-21 SWA4839 IND → FLL Jul 21, 03:35 UTCJul 21, 05:15 UTC1h 40m
2026-07-21 SWA4839 IND → FLL Jul 21, 03:34 UTCJul 21, 05:06 UTC1h 32m
2026-07-20 SWA749 BNA → ORD Jul 20, 21:15 UTCJul 21, 02:35 UTC5h 20m
2026-07-20 SWA4716 - Jul 20, 18:00 UTCJul 20, 19:55 UTC1h 55m
2026-07-20 SWA1148 LGA → DEN Jul 20, 13:10 UTCJul 20, 16:50 UTC3h 40m
2026-07-20 SWA1148 LGA → DEN Jul 20, 13:09 UTCJul 20, 16:43 UTC3h 34m
2026-07-20 SWA138 - Jul 20, 06:50 UTCJul 20, 08:30 UTC1h 40m
2026-07-20 SWA138 - Jul 20, 04:35 UTCJul 20, 05:55 UTC1h 20m
2026-07-20 SWA2755 LAS → ABQ Jul 20, 02:15 UTCJul 20, 03:25 UTC1h 10m
2026-07-20 SWA2213 STL → MDW Jul 20, 00:25 UTCJul 20, 01:05 UTC40m
2026-07-19 SWA2165 SJC → PDX Jul 19, 18:45 UTCJul 19, 23:15 UTC4h 30m
2026-07-19 SWA2165 SJC → PDX Jul 19, 18:45 UTCJul 19, 23:15 UTC4h 30m
2026-07-19 SWA346 - Jul 19, 16:20 UTCJul 19, 17:35 UTC1h 15m
2026-07-19 SWA2833 - Jul 19, 13:15 UTCJul 19, 14:55 UTC1h 40m
2026-07-19 SWA995 MDW → SDF Jul 19, 10:40 UTCJul 19, 12:10 UTC1h 30m
2026-07-19 SWA4180 PDX → SJC Jul 19, 03:20 UTCJul 19, 04:50 UTC1h 30m
2026-07-18 SWA4458 BNA → BOS Jul 18, 23:50 UTCJul 19, 01:55 UTC2h 5m
2026-07-18 SWA2107 SJC → BUR Jul 18, 20:15 UTCJul 18, 22:30 UTC2h 15m
2026-07-18 SWA4939 - Jul 18, 10:05 UTCJul 18, 12:00 UTC1h 55m
2026-07-18 SWA3354 MSY → MDW Jul 18, 05:00 UTCJul 18, 07:40 UTC2h 40m
2026-07-18 SWA3354 MSY → MDW Jul 18, 01:15 UTCJul 18, 04:10 UTC2h 56m
2026-07-17 SWA393 AUS → SEA Jul 17, 20:20 UTCJul 17, 23:55 UTC3h 35m
2026-07-17 SWA393 AUS → SEA Jul 17, 20:16 UTCJul 17, 23:52 UTC3h 37m
2026-07-17 SWA450 - Jul 17, 17:35 UTCJul 17, 19:15 UTC1h 40m
2026-07-17 SWA4492 - Jul 17, 12:25 UTCJul 17, 16:04 UTC3h 40m
2026-07-17 SWA65 - Jul 17, 04:44 UTCJul 17, 07:14 UTC2h 30m
2026-07-16 SWA2104 STL → LGA Jul 16, 23:25 UTCJul 17, 02:15 UTC2h 50m
2026-07-16 SWA4078 MCO → STL Jul 16, 19:20 UTCJul 16, 22:10 UTC2h 50m
2026-07-16 SWA2263 DEN → AUS Jul 16, 16:15 UTCJul 16, 18:00 UTC1h 45m
2026-07-16 SWA2263 DEN → AUS Jul 16, 16:12 UTCJul 16, 17:55 UTC1h 43m
2026-07-16 SWA3195 PDX → DEN Jul 16, 13:05 UTCJul 16, 15:10 UTC2h 5m
2026-07-16 SWA432 SMF → PDX Jul 16, 04:30 UTCJul 16, 05:30 UTC1h 0m
2026-07-15 SWA1524 - Jul 15, 23:45 UTCJul 16, 03:30 UTC3h 45m
2026-07-15 SWA1524 MDW → SMF Jul 15, 23:42 UTCJul 16, 03:25 UTC3h 43m
2026-07-15 SWA1524 - Jul 15, 21:50 UTCJul 15, 22:40 UTC50m

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 N8571Z page for operator, model, and routing details .

Mode-S ABC3EC frequently asked

What is Mode-S code ABC3EC?
ABC3EC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8571Z.
Where is Mode-S ABC3EC registered?
Mode-S code ABC3EC 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 ABC3EC broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 17:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABC3EC, octal 52741754, decimal 11,256,812.
What flights does ABC3EC operate?
Mode-S ABC3EC has broadcast 20 distinct callsigns, including SWA1994, SWA1627, SWA1422, SWA1181, SWA855.