Apparatus

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sensors Mode-S transponder

600851

ICAO 24-bit transponder address · allocated to Azerbaijan

Currently assigned to 4K-AZ81 · BOEING 767-300

Hex
600851
Octal
30004121
Decimal
6,293,585
Country
AZ
Tail
4K-AZ81
Type
B763
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
136
Distinct callsigns
20
Country
AZ
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 600851.

Country allocation

The ICAO 24-bit address 600851 falls within the block assigned to Azerbaijan (AZ) by ICAO Annex 10, Volume III. Every aircraft registered in Azerbaijan 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
AHY121 Azerbaijan Airlines 19 2026-06-23
AHY075 Azerbaijan Airlines 17 2026-07-26
AHY021 - 13 2026-07-18
AHY805 Azerbaijan Airlines 9 2026-05-27
AHY122 Azerbaijan Airlines 9 2026-06-24
AHY023 Azerbaijan Airlines 9 2026-07-25
AHY076 Azerbaijan Airlines 7 2026-07-26
AHY022 Azerbaijan Airlines 6 2026-07-18
AHY809 - 5 2026-07-01
AHY5239 - 5 2026-06-05
AHY181 Azerbaijan Airlines 5 2026-05-07
AHY5218 - 4 2026-05-18
AHY5246 Azerbaijan Airlines 3 2026-06-07
AHY077 - 3 2026-06-29
AHY024 Azerbaijan Airlines 3 2026-07-20
AHY008 - 3 2026-06-02
AHY007 - 3 2026-06-02
AHY807 Azerbaijan Airlines 2 2026-04-22
AHY8003 Azerbaijan Airlines 2 2026-07-21
AHY182 Azerbaijan Airlines 2 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AHY076 IST → GYD Jul 26, 09:15 UTCJul 26, 22:15 UTC13h 0m
2026-07-26 AHY075 GYD → IST Jul 26, 05:10 UTCJul 26, 07:25 UTC2h 16m
2026-07-25 AHY075 GYD → IST Jul 25, 10:20 UTCJul 26, 07:25 UTC21h 6m
2026-07-25 AHY075 GYD → IST Jul 25, 09:10 UTCJul 26, 07:25 UTC22h 16m
2026-07-25 AHY023 GYD → BJV Jul 25, 04:45 UTCJul 25, 07:30 UTC2h 45m
2026-07-24 AHY023 GYD → BJV Jul 24, 10:20 UTCJul 25, 07:30 UTC21h 10m
2026-07-24 AHY023 GYD → BJV Jul 24, 08:45 UTCJul 25, 07:30 UTC22h 45m
2026-07-24 AHY023 GYD → BJV Jul 24, 04:30 UTCJul 24, 07:10 UTC2h 40m
2026-07-21 AHY8003 GYD → ESB Jul 21, 16:35 UTCJul 22, 10:25 UTC17h 50m
2026-07-21 AHY8003 GYD → ESB Jul 21, 08:50 UTCJul 22, 05:25 UTC20h 35m
2026-07-20 AHY024 BJV → GYD Jul 20, 09:15 UTCJul 20, 11:20 UTC2h 5m
2026-07-20 AHY023 GYD → BJV Jul 20, 04:45 UTCJul 20, 07:10 UTC2h 25m
2026-07-18 AHY332 TLV → GYD Jul 18, 20:55 UTCJul 18, 22:55 UTC2h 0m
2026-07-18 AHY331 GYD → TLV Jul 18, 17:00 UTCJul 18, 19:35 UTC2h 35m
2026-07-18 AHY022 TLV → GYD Jul 18, 09:25 UTCJul 18, 11:30 UTC2h 5m
2026-07-18 AHY021 - Jul 18, 05:25 UTCJul 18, 08:00 UTC2h 35m
2026-07-17 AHY021 - Jul 17, 10:20 UTCJul 18, 08:00 UTC21h 41m
2026-07-17 AHY021 TLV → TLV Jul 17, 08:59 UTCJul 18, 08:00 UTC23h 1m
2026-07-17 AHY021 - Jul 17, 04:35 UTCJul 17, 07:25 UTC2h 50m
2026-07-15 AHY024 - Jul 15, 09:05 UTCJul 15, 11:05 UTC2h 0m
2026-07-15 AHY023 - Jul 15, 04:40 UTCJul 15, 06:00 UTC1h 20m
2026-07-14 AHY023 - Jul 14, 08:20 UTCJul 15, 06:00 UTC21h 39m
2026-07-14 AHY023 - Jul 14, 07:50 UTCJul 15, 06:00 UTC22h 9m
2026-07-10 AHY076 - Jul 10, 10:10 UTCJul 10, 11:50 UTC1h 40m
2026-07-10 AHY075 - Jul 10, 05:50 UTCJul 10, 07:15 UTC1h 25m
2026-07-02 AHY024 - Jul 2, 08:50 UTCJul 2, 10:50 UTC2h 0m
2026-07-02 AHY023 - Jul 2, 04:40 UTCJul 2, 07:15 UTC2h 35m
2026-07-01 AHY809 - Jul 1, 20:35 UTCJul 1, 20:45 UTC10m
2026-07-01 AHY022 TLV → GYD Jul 1, 09:35 UTCJul 1, 11:05 UTC1h 30m
2026-06-30 AHY076 - Jun 30, 10:20 UTCJul 1, 06:10 UTC19h 50m
2026-06-30 AHY076 - Jun 30, 09:25 UTCJul 1, 06:10 UTC20h 45m
2026-06-29 AHY075 - Jun 29, 20:09 UTCJun 30, 07:30 UTC11h 21m
2026-06-29 AHY077 - Jun 29, 18:10 UTCJun 29, 18:30 UTC20m
2026-06-29 AHY022 TLV → GYD Jun 29, 09:50 UTCJun 29, 17:24 UTC7h 35m
2026-06-29 AHY021 GYD → TLV Jun 29, 05:45 UTCJun 29, 08:14 UTC2h 30m
2026-06-27 AHY182 DME → GYD Jun 27, 10:40 UTCJun 27, 11:04 UTC25m
2026-06-24 AHY122 KVD → LED Jun 24, 11:59 UTCJun 24, 14:04 UTC2h 5m
2026-06-23 AHY121 LED → KVD Jun 23, 18:10 UTCJun 24, 10:14 UTC16h 5m
2026-06-23 AHY121 LED → KVD Jun 23, 12:20 UTCJun 24, 10:14 UTC21h 55m
2026-06-23 AHY121 LED → KVD Jun 23, 11:49 UTCJun 24, 10:14 UTC22h 25m
2026-06-22 AHY121 LED → KVD Jun 22, 16:20 UTCJun 23, 10:19 UTC18h 0m
2026-06-22 AHY121 LED → KVD Jun 22, 16:05 UTCJun 23, 10:19 UTC18h 15m
2026-06-21 AHY122 KVD → LED Jun 21, 11:59 UTCJun 21, 13:15 UTC1h 15m
2026-06-21 AHY121 LED → KVD Jun 21, 07:34 UTCJun 21, 08:25 UTC50m
2026-06-19 AHY122 KVD → LED Jun 19, 11:49 UTCJun 19, 12:34 UTC45m
2026-06-19 AHY121 LED → KVD Jun 19, 07:39 UTCJun 19, 10:24 UTC2h 45m
2026-06-18 AHY121 LED → KVD Jun 18, 12:20 UTCJun 19, 10:24 UTC22h 4m
2026-06-18 AHY121 LED → KVD Jun 18, 12:05 UTCJun 19, 10:14 UTC22h 9m
2026-06-17 AHY121 LED → KVD Jun 17, 22:10 UTCJun 18, 10:35 UTC12h 25m
2026-06-17 AHY121 LED → KVD Jun 17, 12:20 UTCJun 18, 10:35 UTC22h 15m

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 4K-AZ81 page for operator, model, and routing details .

Mode-S 600851 frequently asked

What is Mode-S code 600851?
600851 is an ICAO 24-bit transponder address. Allocated to Azerbaijan. Assigned to 4K-AZ81.
Where is Mode-S 600851 registered?
Mode-S code 600851 is allocated to Azerbaijan (AZ). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 600851 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 600851, octal 30004121, decimal 6,293,585.
What flights does 600851 operate?
Mode-S 600851 has broadcast 20 distinct callsigns, including AHY121, AHY075, AHY021, AHY805, AHY122.