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 Jul 26, 21:45 UTC
Flights observed
755
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

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 9 2026-07-25
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
SWA2266 - 4 2026-07-18
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA442 BWI → BOS Jul 26, 19:35 UTCJul 26, 21:45 UTC2h 10m
2026-07-26 SWA2626 LAX → OAK Jul 26, 16:40 UTCJul 26, 17:50 UTC1h 10m
2026-07-26 SWA2626 LAX → OAK Jul 26, 14:15 UTCJul 26, 15:35 UTC1h 20m
2026-07-26 SWA4403 TPA → BWI Jul 26, 10:30 UTCJul 26, 13:05 UTC2h 35m
2026-07-25 SWA3019 RNO → OAK Jul 25, 21:20 UTCJul 25, 22:40 UTC1h 20m
2026-07-25 SWA1004 STL → LAS Jul 25, 19:00 UTCJul 25, 20:00 UTC1h 0m
2026-07-25 SWA733 ATL → CLE Jul 25, 16:45 UTCJul 25, 17:45 UTC1h 0m
2026-07-25 SWA733 ATL → CLE Jul 25, 16:50 UTCJul 25, 17:50 UTC1h 0m
2026-07-25 SWA884 SJC → PHX Jul 25, 14:50 UTCJul 25, 15:40 UTC50m
2026-07-25 SWA3559 SAN → LAS Jul 25, 10:25 UTCJul 25, 13:30 UTC3h 5m
2026-07-25 SWA3559 SAN → LAS Jul 25, 10:24 UTCJul 25, 13:24 UTC3h 0m
2026-07-25 SWA3229 LAS → AUS Jul 25, 05:05 UTCJul 25, 07:15 UTC2h 10m
2026-07-25 SWA999 PHL → FLL Jul 25, 02:40 UTCJul 25, 04:15 UTC1h 35m
2026-07-25 SWA999 PHL → FLL Jul 25, 02:37 UTCJul 25, 04:08 UTC1h 32m
2026-07-24 SWA1805 AUA → BWI Jul 24, 20:15 UTCJul 25, 00:15 UTC4h 0m
2026-07-24 SWA1805 AUA → BWI Jul 24, 20:13 UTCJul 25, 00:11 UTC3h 58m
2026-07-24 SWA1443 BNA → LGA Jul 24, 16:15 UTCJul 24, 18:55 UTC2h 40m
2026-07-24 SWA986 SJC → SAN Jul 24, 12:25 UTCJul 24, 14:15 UTC1h 50m
2026-07-24 SWA986 SJC → SAN Jul 24, 12:24 UTCJul 24, 14:16 UTC1h 53m
2026-07-24 SWA2113 PDX → SMF Jul 24, 09:55 UTCJul 24, 10:15 UTC20m
2026-07-24 SWA2113 PDX → SMF Jul 24, 09:54 UTCJul 24, 11:00 UTC1h 6m
2026-07-24 SWA3231 CVG → MDW Jul 24, 02:40 UTCJul 24, 05:45 UTC3h 5m
2026-07-24 SWA3231 CVG → MDW Jul 24, 00:05 UTCJul 24, 01:35 UTC1h 30m
2026-07-23 SWA2709 BWI → MHT Jul 23, 18:15 UTCJul 23, 23:05 UTC4h 50m
2026-07-23 SWA162 SEA → SJC Jul 23, 14:15 UTCJul 23, 16:50 UTC2h 35m
2026-07-23 SWA4863 - Jul 23, 10:40 UTCJul 23, 13:00 UTC2h 20m
2026-07-22 SWA1340 DEN → LGA Jul 22, 22:49 UTCJul 23, 01:02 UTC2h 13m
2026-07-22 SWA1340 DEN → LGA Jul 22, 22:50 UTCJul 23, 01:10 UTC2h 20m
2026-07-22 SWA2496 SJC → BUR Jul 22, 20:05 UTCJul 22, 21:05 UTC1h 0m
2026-07-22 SWA1642 OAK → BLI Jul 22, 16:50 UTCJul 22, 19:10 UTC2h 20m
2026-07-22 SWA3910 STL → DEN Jul 22, 13:31 UTCJul 22, 15:20 UTC1h 50m
2026-07-22 SWA3910 STL → DEN Jul 22, 13:35 UTCJul 22, 15:25 UTC1h 50m
2026-07-22 SWA3471 DEN → SAN Jul 22, 11:15 UTCJul 22, 12:25 UTC1h 10m
2026-07-22 SWA3471 DEN → SAN Jul 22, 10:11 UTCJul 22, 12:24 UTC2h 14m
2026-07-22 SWA4831 - Jul 22, 00:20 UTCJul 22, 02:25 UTC2h 5m
2026-07-21 SWA4341 STL → DCA Jul 21, 22:35 UTCJul 21, 23:10 UTC35m
2026-07-21 SWA1776 OAK → BUR Jul 21, 18:35 UTCJul 21, 21:10 UTC2h 35m
2026-07-21 SWA1776 OAK → BUR Jul 21, 18:33 UTCJul 21, 21:10 UTC2h 37m
2026-07-21 SWA2767 MDW → SRQ Jul 21, 15:50 UTCJul 21, 17:40 UTC1h 50m
2026-07-21 SWA418 SJC → LAS Jul 21, 13:50 UTCJul 21, 14:50 UTC1h 0m
2026-07-21 SWA4856 - Jul 21, 11:40 UTCJul 21, 12:50 UTC1h 10m
2026-07-21 SWA662 DEN → MSP Jul 21, 06:40 UTCJul 21, 07:15 UTC35m
2026-07-21 SWA1684 DEN → GEG Jul 21, 03:40 UTCJul 21, 05:15 UTC1h 35m
2026-07-21 SWA505 - Jul 21, 00:15 UTCJul 21, 02:35 UTC2h 20m
2026-07-20 SWA1712 BDL → TPA Jul 20, 22:40 UTCJul 20, 23:15 UTC35m
2026-07-20 SWA1712 BDL → TPA Jul 20, 19:40 UTCJul 20, 21:45 UTC2h 5m
2026-07-20 SWA2944 LAX → LAS Jul 20, 16:00 UTCJul 20, 18:10 UTC2h 10m
2026-07-20 SWA585 SAN → SFO Jul 20, 13:40 UTCJul 20, 14:50 UTC1h 10m
2026-07-20 SWA3349 - Jul 20, 11:25 UTCJul 20, 12:05 UTC40m
2026-07-20 SWA3349 CVG → BNA Jul 20, 11:20 UTCJul 20, 12:03 UTC43m

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 Jul 26, 21:45 UTC.
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.