Apparatus

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sensors Mode-S transponder

ABBCC1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8553W · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABBCC1
Octal
52736301
Decimal
11,254,977
Country
US
Tail
N8553W
Type
B738
No current signal · last broadcast 1h ago
Flights observed
670
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S ABBCC1.

Country allocation

The ICAO 24-bit address ABBCC1 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
SWA3559 Southwest Airlines 7 2026-05-29
SWA1355 - 6 2026-06-21
SWA766 - 5 2026-07-07
SWA178 Southwest Airlines 5 2026-05-29
SWA1347 Southwest Airlines 5 2026-06-13
SWA1255 - 5 2026-07-12
SWA845 Southwest Airlines 4 2026-05-28
SWA734 - 4 2026-06-27
SWA541 - 4 2026-07-13
SWA4598 - 4 2026-07-13
SWA4291 Southwest Airlines 4 2026-05-28
SWA3569 Southwest Airlines 4 2026-05-29
SWA3317 Southwest Airlines 4 2026-06-08
SWA3300 Southwest Airlines 4 2026-07-01
SWA2010 Southwest Airlines 4 2026-05-28
SWA1893 - 4 2026-07-03
SWA1823 - 4 2026-06-20
SWA1567 Southwest Airlines 4 2026-04-19
SWA1281 - 4 2026-07-11
SWA679 Southwest Airlines 3 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA1939 - Jul 15, 03:15 UTCJul 15, 04:15 UTC1h 0m
2026-07-15 SWA1533 SLC → PHX Jul 15, 01:05 UTCJul 15, 02:25 UTC1h 20m
2026-07-14 SWA1732 DEN → SLC Jul 14, 23:10 UTCJul 15, 00:10 UTC1h 0m
2026-07-14 SWA1732 DEN → SLC Jul 14, 23:06 UTCJul 15, 00:06 UTC1h 0m
2026-07-14 SWA3852 - Jul 14, 18:35 UTCJul 14, 21:55 UTC3h 20m
2026-07-14 SWA3852 TPA → DEN Jul 14, 18:31 UTCJul 14, 21:44 UTC3h 13m
2026-07-14 SWA1120 BWI → TPA Jul 14, 15:15 UTCJul 14, 17:10 UTC1h 55m
2026-07-14 SWA1120 - Jul 14, 12:45 UTCJul 14, 14:10 UTC1h 25m
2026-07-14 SWA3178 - Jul 14, 11:25 UTCJul 14, 11:55 UTC30m
2026-07-14 SWA2666 MCO → MKE Jul 14, 03:35 UTCJul 14, 05:50 UTC2h 15m
2026-07-14 SWA2666 MCO → MKE Jul 14, 03:33 UTCJul 14, 05:51 UTC2h 18m
2026-07-14 SWA4720 AUS → MCO Jul 14, 00:03 UTCJul 14, 02:30 UTC2h 28m
2026-07-14 SWA4720 AUS → MCO Jul 14, 00:05 UTCJul 14, 02:30 UTC2h 25m
2026-07-13 SWA4860 - Jul 13, 19:30 UTCJul 13, 22:30 UTC3h 0m
2026-07-13 SWA4860 JAX → AUS Jul 13, 19:26 UTCJul 13, 22:27 UTC3h 1m
2026-07-13 SWA541 - Jul 13, 15:25 UTCJul 13, 16:35 UTC1h 10m
2026-07-13 SWA541 BNA → JAX Jul 13, 15:24 UTCJul 13, 16:33 UTC1h 9m
2026-07-13 SWA4598 - Jul 13, 12:50 UTCJul 13, 14:05 UTC1h 15m
2026-07-13 SWA4598 MKE → BNA Jul 13, 12:46 UTCJul 13, 13:58 UTC1h 12m
2026-07-13 SWA2666 MCO → MKE Jul 13, 00:55 UTCJul 13, 03:20 UTC2h 25m
2026-07-12 SWA160 - Jul 12, 21:30 UTCJul 12, 22:15 UTC45m
2026-07-12 SWA160 ALB → MCO Jul 12, 21:25 UTCJul 12, 23:50 UTC2h 26m
2026-07-12 SWA160 - Jul 12, 18:50 UTCJul 12, 20:20 UTC1h 30m
2026-07-12 SWA3137 COS → MDW Jul 12, 15:45 UTCJul 12, 17:45 UTC2h 0m
2026-07-12 SWA3419 DEN → COS Jul 12, 14:14 UTCJul 12, 14:32 UTC18m
2026-07-12 SWA3419 DEN → COS Jul 12, 14:15 UTCJul 12, 14:35 UTC20m
2026-07-12 SWA1581 ABQ → DEN Jul 12, 11:20 UTCJul 12, 12:15 UTC55m
2026-07-12 SWA1255 - Jul 12, 03:01 UTCJul 12, 04:20 UTC1h 20m
2026-07-12 SWA1255 DAL → ABQ Jul 12, 02:59 UTCJul 12, 04:21 UTC1h 22m
2026-07-12 SWA1255 - Jul 12, 00:20 UTCJul 12, 02:05 UTC1h 45m
2026-07-11 SWA1255 MCO → MDW Jul 11, 20:50 UTCJul 11, 23:10 UTC2h 20m
2026-07-11 SWA1281 - Jul 11, 18:00 UTCJul 11, 19:50 UTC1h 50m
2026-07-11 SWA1281 - Jul 11, 16:10 UTCJul 11, 16:40 UTC30m
2026-07-11 SWA1281 - Jul 11, 12:40 UTCJul 11, 15:15 UTC2h 35m
2026-07-11 SWA3109 OKC → DAL Jul 11, 10:45 UTCJul 11, 11:25 UTC40m
2026-07-11 SWA4087 PHX → OKC Jul 11, 03:30 UTCJul 11, 05:20 UTC1h 50m
2026-07-11 SWA878 - Jul 11, 00:55 UTCJul 11, 02:35 UTC1h 40m
2026-07-10 SWA3519 - Jul 10, 23:00 UTCJul 11, 00:05 UTC1h 5m
2026-07-10 SWA3075 OAK → SAN Jul 10, 20:40 UTCJul 10, 21:50 UTC1h 10m
2026-07-10 SWA4166 - Jul 10, 18:00 UTCJul 10, 19:00 UTC1h 0m
2026-07-10 SWA4166 SAN → OAK Jul 10, 17:57 UTCJul 10, 18:54 UTC58m
2026-07-10 SWA4166 SMF → SAN Jul 10, 14:55 UTCJul 10, 16:10 UTC1h 15m
2026-07-10 SWA3629 SEA → SMF Jul 10, 12:20 UTCJul 10, 13:45 UTC1h 25m
2026-07-10 SWA3856 DEN → SEA Jul 10, 05:00 UTCJul 10, 07:20 UTC2h 20m
2026-07-09 SWA742 BOS → DEN Jul 9, 22:40 UTCJul 10, 03:30 UTC4h 50m
2026-07-09 SWA4372 BNA → BOS Jul 9, 19:00 UTCJul 9, 21:20 UTC2h 20m
2026-07-09 SWA4372 BNA → BOS Jul 9, 19:00 UTCJul 9, 21:18 UTC2h 19m
2026-07-09 SWA1991 - Jul 9, 16:55 UTCJul 9, 17:40 UTC45m
2026-07-09 SWA1991 JAN → BNA Jul 9, 16:45 UTCJul 9, 17:39 UTC54m
2026-07-09 SWA1991 - Jul 9, 14:35 UTCJul 9, 15:15 UTC40m

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 N8553W page for operator, model, and routing details .

Mode-S ABBCC1 frequently asked

What is Mode-S code ABBCC1?
ABBCC1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8553W.
Where is Mode-S ABBCC1 registered?
Mode-S code ABBCC1 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 ABBCC1 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABBCC1, octal 52736301, decimal 11,254,977.
What flights does ABBCC1 operate?
Mode-S ABBCC1 has broadcast 20 distinct callsigns, including SWA3559, SWA1355, SWA766, SWA178, SWA1347.