Apparatus

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sensors Mode-S transponder

A0851B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1321A · BOEING 767-300 · operated by ANDROMEDA LEASING I LLC

Hex
A0851B
Octal
50102433
Decimal
10,519,835
Country
US
Tail
N1321A
Type
B763
Broadcasting now · callsign ABX3106 · 37,025 ft
Flights observed
115
Distinct callsigns
20
Country
US
Last broadcast
16h ago

Current position

A0851B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A0851B 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
ABX3107 ABX Air 9 2026-05-17
ABX3116 ABX Air 7 2026-05-21
ABX3113 ABX Air 7 2026-05-18
ABX3110 ABX Air 7 2026-05-25
ABX3102 ABX Air 7 2026-05-18
ABX3112 ABX Air 6 2026-05-15
ABX3111 ABX Air 6 2026-05-26
ABX3106 ABX Air 6 2026-05-21
ABX3104 ABX Air 6 2026-05-29
ABX3103 ABX Air 6 2026-05-25
ABX3101 ABX Air 6 2026-05-17
ABX3100 ABX Air 6 2026-05-20
ABX3130 ABX Air 5 2026-05-26
ABX3125 ABX Air 5 2026-05-24
ABX3109 ABX Air 5 2026-05-15
ABX3114 ABX Air 4 2026-05-15
ABX3105 ABX Air 4 2026-05-15
ABX3115 ABX Air 2 2026-05-03
ABX3108 ABX Air 2 2026-05-03
ABX6616 ABX Air 1 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ABX3164 ONT → RFD May 29, 09:55 UTCMay 29, 13:00 UTC3h 5m
2026-05-29 ABX3104 MIA → AFW May 29, 02:10 UTCMay 29, 06:25 UTC4h 15m
2026-05-28 ABX3187 SEA → CVG May 28, 07:25 UTCMay 28, 11:20 UTC3h 55m
2026-05-27 ABX3143 AFW → SEA May 27, 18:55 UTCMay 27, 22:10 UTC3h 15m
2026-05-27 ABX3137 AFW → RFD May 27, 10:30 UTCMay 27, 13:25 UTC2h 55m
2026-05-27 ABX3189 AFW → MIA May 27, 04:19 UTCMay 27, 06:44 UTC2h 25m
2026-05-26 ABX3130 SMF → ILN May 26, 09:09 UTCMay 26, 12:40 UTC3h 30m
2026-05-26 ABX3111 CVG → MIA May 26, 02:15 UTCMay 26, 03:55 UTC1h 40m
2026-05-25 ABX3110 CVG → PHX May 25, 18:45 UTCMay 25, 22:55 UTC4h 9m
2026-05-25 ABX3103 SCK → RFD May 25, 06:40 UTCMay 25, 10:25 UTC3h 45m
2026-05-24 ABX3125 AFW → SEA May 24, 19:00 UTCMay 24, 21:45 UTC2h 45m
2026-05-24 ABX3130 SMF → ILN May 24, 09:40 UTCMay 24, 12:55 UTC3h 15m
2026-05-23 ABX3125 AFW → SEA May 23, 19:15 UTCMay 23, 22:55 UTC3h 40m
2026-05-23 ABX3130 SMF → ILN May 23, 08:55 UTCMay 23, 12:05 UTC3h 10m
2026-05-23 ABX3111 CVG → MIA May 23, 01:40 UTCMay 23, 03:10 UTC1h 29m
2026-05-22 ABX3110 CVG → PHX May 22, 18:50 UTCMay 22, 23:00 UTC4h 10m
2026-05-22 ABX3103 SCK → RFD May 22, 06:50 UTCMay 22, 10:45 UTC3h 55m
2026-05-22 ABX3111 CVG → MIA May 22, 01:50 UTCMay 22, 03:35 UTC1h 45m
2026-05-21 ABX3110 CVG → PHX May 21, 18:55 UTCMay 21, 23:05 UTC4h 10m
2026-05-21 ABX3106 MHT → AFW May 21, 08:20 UTCMay 21, 10:10 UTC1h 50m
2026-05-21 ABX3116 AFW → SCK May 21, 04:20 UTCMay 21, 06:05 UTC1h 45m
2026-05-21 ABX6616 CVG → MHT May 21, 00:00 UTCMay 21, 00:45 UTC45m
2026-05-20 ABX3104 MIA → AFW May 20, 08:10 UTCMay 20, 08:55 UTC45m
2026-05-20 ABX3100 CVG → MIA May 20, 05:00 UTCMay 20, 05:45 UTC45m
2026-05-19 ABX3104 MIA → AFW May 19, 08:20 UTCMay 19, 09:35 UTC1h 15m
2026-05-19 ABX3100 CVG → MIA May 19, 05:15 UTCMay 19, 06:10 UTC55m
2026-05-18 ABX3102 SMF → LAL May 18, 07:40 UTCMay 18, 11:25 UTC3h 45m
2026-05-18 ABX3113 AFW → MIA May 18, 01:20 UTCMay 18, 05:20 UTC4h 0m
2026-05-17 ABX3107 SCK → CVG May 17, 11:10 UTCMay 17, 13:10 UTC2h 0m
2026-05-17 ABX3101 CVG → ONT May 17, 05:20 UTCMay 17, 06:55 UTC1h 35m
2026-05-16 ABX3106 MHT → AFW May 16, 08:46 UTCMay 16, 10:31 UTC1h 45m
2026-05-16 ABX3116 AFW → SCK May 16, 04:45 UTCMay 16, 06:31 UTC1h 46m
2026-05-15 ABX3112 MHT → CVG May 15, 23:05 UTCMay 16, 01:40 UTC2h 35m
2026-05-15 ABX3109 AFW → ONT May 15, 17:20 UTCMay 15, 19:55 UTC2h 35m
2026-05-15 ABX3105 MHT → CVG May 15, 09:25 UTCMay 15, 12:35 UTC3h 10m
2026-05-15 ABX3114 RFD → MHT May 15, 02:15 UTCMay 15, 06:10 UTC3h 55m
2026-05-14 ABX3102 SMF → LAL May 14, 07:20 UTCMay 14, 11:05 UTC3h 45m
2026-05-14 ABX3113 AFW → MIA May 14, 01:15 UTCMay 14, 04:51 UTC3h 35m
2026-05-13 ABX3107 SCK → CVG May 13, 10:55 UTCMay 13, 12:55 UTC2h 0m
2026-05-13 ABX3101 CVG → ONT May 13, 05:00 UTCMay 13, 06:30 UTC1h 30m
2026-05-12 ABX3102 SMF → LAL May 12, 07:40 UTCMay 12, 11:15 UTC3h 35m
2026-05-12 ABX3113 AFW → MIA May 12, 02:45 UTCMay 12, 05:00 UTC2h 15m
2026-05-11 ABX3105 MHT → CVG May 11, 09:45 UTCMay 11, 12:50 UTC3h 5m
2026-05-11 ABX3114 RFD → MHT May 11, 02:20 UTCMay 11, 06:15 UTC3h 55m
2026-05-10 ABX3104 MIA → AFW May 10, 08:35 UTCMay 10, 09:20 UTC45m
2026-05-10 ABX3100 CVG → MIA May 10, 05:14 UTCMay 10, 06:10 UTC55m
2026-05-09 ABX3103 SCK → RFD May 9, 06:45 UTCMay 9, 10:20 UTC3h 35m
2026-05-08 ABX3125 AFW → SEA May 8, 19:30 UTCMay 8, 23:10 UTC3h 40m
2026-05-08 ABX3130 SMF → ILN May 8, 09:09 UTCMay 8, 12:20 UTC3h 10m
2026-05-08 ABX3111 CVG → MIA May 8, 01:45 UTCMay 8, 03:30 UTC1h 45m

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 N1321A page for operator, model, and routing details .

Mode-S A0851B frequently asked

What is Mode-S code A0851B?
A0851B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1321A.
Where is Mode-S A0851B registered?
Mode-S code A0851B 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 A0851B broadcasting right now?
Yes. Mode-S A0851B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0851B, octal 50102433, decimal 10,519,835.
What flights does A0851B operate?
Mode-S A0851B has broadcast 20 distinct callsigns, including ABX3107, ABX3116, ABX3113, ABX3110, ABX3102.