Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A6A1B4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5261A · BOEING 737-800 · operated by BANK OF UTAH TRUSTEE

Hex
A6A1B4
Octal
51520664
Decimal
10,920,372
Country
US
Tail
N5261A
Type
B738
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
311
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A6A1B4.

Country allocation

The ICAO 24-bit address A6A1B4 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
SCX3034 - 11 2026-07-18
SCX3033 Sun Country Airlines 10 2026-07-19
SCX3038 Sun Country Airlines 9 2026-07-22
SCX3055 - 8 2026-07-22
SCX3050 - 8 2026-07-06
SCX3048 - 8 2026-07-01
SCX3039 Sun Country Airlines 7 2026-07-22
SCX3029 - 7 2026-07-16
SCX3056 - 6 2026-06-20
SCX3054 Sun Country Airlines 6 2026-05-27
SCX3018 Sun Country Airlines 6 2026-07-26
SCX3099 Sun Country Airlines 5 2026-07-25
SCX3094 - 5 2026-07-16
SCX3093 Sun Country Airlines 5 2026-07-23
SCX3091 Sun Country Airlines 5 2026-07-18
SCX3081 - 5 2026-06-19
SCX3071 Sun Country Airlines 5 2026-07-23
SCX3061 Sun Country Airlines 5 2026-05-26
SCX3057 - 5 2026-06-28
SCX3053 - 5 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SCX3031 ORD → LAL Jul 26, 21:10 UTCJul 26, 23:00 UTC1h 50m
2026-07-26 SCX3019 LAL → AUS Jul 26, 17:35 UTCJul 26, 19:35 UTC2h 0m
2026-07-26 SCX3065 CVG → LAL Jul 26, 06:20 UTCJul 26, 07:55 UTC1h 36m
2026-07-26 SCX3065 CVG → LAL Jul 26, 06:05 UTCJul 26, 06:15 UTC10m
2026-07-26 SCX3018 CVG → RIC Jul 26, 03:20 UTCJul 26, 04:20 UTC1h 0m
2026-07-25 SCX3001 MSY → CVG Jul 25, 20:15 UTCJul 25, 23:25 UTC3h 10m
2026-07-25 SCX3051 CVG → MCI Jul 25, 12:50 UTCJul 25, 16:30 UTC3h 40m
2026-07-25 SCX3099 LAL → ORD Jul 25, 04:35 UTCJul 25, 06:30 UTC1h 55m
2026-07-24 SCX3092 CVG → DEN Jul 24, 23:05 UTCJul 25, 02:10 UTC3h 5m
2026-07-24 SCX3009 AFW → BDL Jul 24, 17:25 UTCJul 24, 20:50 UTC3h 25m
2026-07-24 SCX3037 LAL → TOL Jul 24, 12:05 UTCJul 24, 15:35 UTC3h 30m
2026-07-24 SCX3032 MSP → CVG Jul 24, 05:05 UTCJul 24, 08:25 UTC3h 20m
2026-07-23 SCX3071 BDL → AFW Jul 23, 23:30 UTCJul 24, 01:40 UTC2h 10m
2026-07-23 SCX3093 AUS → PHX Jul 23, 19:20 UTCJul 23, 21:45 UTC2h 25m
2026-07-23 SCX3025 TOL → LAL Jul 23, 05:00 UTCJul 23, 06:20 UTC1h 20m
2026-07-22 SCX3039 CVG → MSY Jul 22, 19:45 UTCJul 22, 23:15 UTC3h 30m
2026-07-22 SCX3055 - Jul 22, 13:15 UTCJul 22, 16:20 UTC3h 5m
2026-07-22 SCX3038 RIC → LAL Jul 22, 00:45 UTCJul 22, 03:00 UTC2h 15m
2026-07-21 SCX3011 LAL → BDL Jul 21, 21:00 UTCJul 21, 23:05 UTC2h 5m
2026-07-21 SCX3058 CVG → MSP Jul 21, 10:30 UTCJul 21, 13:40 UTC3h 10m
2026-07-21 SCX3073 - Jul 21, 05:30 UTCJul 21, 07:05 UTC1h 35m
2026-07-20 SCX6511 MSP → TOL Jul 20, 20:00 UTCJul 20, 21:40 UTC1h 40m
2026-07-20 SCX3073 - Jul 20, 05:20 UTCJul 20, 06:50 UTC1h 30m
2026-07-19 SCX3033 MSP → SBD Jul 19, 22:05 UTCJul 19, 23:20 UTC1h 15m
2026-07-19 SCX3089 PDX → FAI Jul 19, 06:05 UTCJul 19, 07:30 UTC1h 25m
2026-07-18 SCX3034 - Jul 18, 22:20 UTCJul 18, 23:35 UTC1h 15m
2026-07-18 SCX3091 BDL → AFW Jul 18, 19:30 UTCJul 18, 20:40 UTC1h 10m
2026-07-18 SCX3013 - Jul 18, 10:10 UTCJul 18, 11:30 UTC1h 20m
2026-07-18 SCX3024 - Jul 18, 07:00 UTCJul 18, 08:10 UTC1h 10m
2026-07-18 SCX3064 TOL → LAL Jul 18, 03:45 UTCJul 18, 05:15 UTC1h 30m
2026-07-17 SCX3053 BNA → BWI Jul 17, 23:39 UTCJul 18, 01:05 UTC1h 25m
2026-07-17 SCX3003 - Jul 17, 19:09 UTCJul 17, 20:50 UTC1h 40m
2026-07-16 SCX3094 - Jul 16, 10:40 UTCJul 16, 13:15 UTC2h 35m
2026-07-16 SCX3029 CVG → BOI Jul 16, 05:15 UTCJul 16, 08:45 UTC3h 30m
2026-07-15 SCX3034 - Jul 15, 22:30 UTCJul 15, 23:50 UTC1h 20m
2026-07-15 SCX3091 - Jul 15, 19:45 UTCJul 15, 20:55 UTC1h 10m
2026-07-15 SCX3055 - Jul 15, 13:15 UTCJul 15, 16:40 UTC3h 25m
2026-07-15 SCX3029 - Jul 15, 06:00 UTCJul 15, 09:15 UTC3h 15m
2026-07-14 SCX3033 MSP → CVG Jul 14, 22:25 UTCJul 14, 23:45 UTC1h 19m
2026-07-14 SX3089 CVG → MSP Jul 14, 04:50 UTCJul 14, 06:10 UTC1h 20m
2026-07-13 SCX3033 MSP → CVG Jul 13, 22:20 UTCJul 13, 23:40 UTC1h 20m
2026-07-10 SCX3089 - Jul 10, 05:05 UTCJul 10, 06:45 UTC1h 40m
2026-07-09 SCX3034 - Jul 9, 22:15 UTCJul 9, 23:25 UTC1h 10m
2026-07-09 SCX3091 - Jul 9, 18:55 UTCJul 9, 20:10 UTC1h 15m
2026-07-09 SCX3086 ABQ → CVG Jul 9, 07:35 UTCJul 9, 10:20 UTC2h 45m
2026-07-09 SCX3067 - Jul 9, 04:40 UTCJul 9, 05:55 UTC1h 15m
2026-07-08 SCX3071 LAS → AFW Jul 8, 23:15 UTCJul 9, 01:25 UTC2h 10m
2026-07-08 SCX3093 - Jul 8, 19:10 UTCJul 8, 21:25 UTC2h 15m
2026-07-06 SCX3050 - Jul 6, 08:05 UTCJul 6, 10:10 UTC2h 5m
2026-07-06 SCX3018 - Jul 6, 03:35 UTCJul 6, 04:30 UTC55m

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 N5261A page for operator, model, and routing details .

Mode-S A6A1B4 frequently asked

What is Mode-S code A6A1B4?
A6A1B4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5261A.
Where is Mode-S A6A1B4 registered?
Mode-S code A6A1B4 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 A6A1B4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6A1B4, octal 51520664, decimal 10,920,372.
What flights does A6A1B4 operate?
Mode-S A6A1B4 has broadcast 20 distinct callsigns, including SCX3034, SCX3033, SCX3038, SCX3055, SCX3050.