Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

50840A

ICAO 24-bit transponder address · allocated to Ukraine

Currently assigned to UR-AZE · BOEING 737-800

Hex
50840A
Octal
24102012
Decimal
5,276,682
Country
UA
Tail
UR-AZE
Type
B738
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
223
Distinct callsigns
20
Country
UA
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S 50840A.

Country allocation

The ICAO 24-bit address 50840A falls within the block assigned to Ukraine (UA) by ICAO Annex 10, Volume III. Every aircraft registered in Ukraine 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
UTN9122 Trans-Ulgii 33 2026-07-23
UTN9121 Trans-Ulgii 25 2026-07-21
UTN9124 - 14 2026-07-20
UTN7422 Trans-Ulgii 13 2026-07-17
UTN7421 Trans-Ulgii 12 2026-07-17
UTN2226 Trans-Ulgii 11 2026-07-26
UTN2225 Trans-Ulgii 10 2026-07-26
UTN9148 Trans-Ulgii 8 2026-07-24
UTN9123 - 8 2026-07-17
UTN9147 Trans-Ulgii 7 2026-07-22
UTN3624 - 7 2026-07-06
UTN9126 Trans-Ulgii 6 2026-07-19
UTN7022 - 5 2026-05-26
UTN7021 Trans-Ulgii 5 2026-05-26
UTN2248 Trans-Ulgii 5 2026-07-25
UTN9178 Trans-Ulgii 4 2026-07-25
UTN9127 Trans-Ulgii 4 2026-07-20
UTN7126 Trans-Ulgii 4 2026-04-15
UTN7125 Trans-Ulgii 4 2026-04-15
UTN3623 - 4 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UTN2225 WAW → HRG Jul 26, 13:05 UTCJul 26, 22:30 UTC9h 25m
2026-07-26 UTN2226 HRG → WAW Jul 26, 02:15 UTCJul 26, 11:30 UTC9h 16m
2026-07-25 UTN9178 RMF → KTW Jul 25, 14:00 UTCJul 25, 23:45 UTC9h 45m
2026-07-25 UTN2248 WAW → RMF Jul 25, 01:25 UTCJul 25, 11:45 UTC10h 20m
2026-07-24 UTN9148 RMF → KTW Jul 24, 14:30 UTCJul 24, 21:40 UTC7h 10m
2026-07-24 UTN4277 BTS → RMF Jul 24, 12:10 UTCJul 24, 14:05 UTC1h 55m
2026-07-24 UTN4278 - Jul 24, 01:10 UTCJul 24, 10:40 UTC9h 30m
2026-07-23 UTN9122 HRG → KTW Jul 23, 12:55 UTCJul 23, 22:30 UTC9h 35m
2026-07-23 UTN2324 - Jul 23, 02:10 UTCJul 23, 11:30 UTC9h 20m
2026-07-22 UTN9147 KTW → RMF Jul 22, 01:10 UTCJul 22, 04:15 UTC3h 5m
2026-07-21 UTN9122 - Jul 21, 12:35 UTCJul 21, 23:30 UTC10h 55m
2026-07-21 UTN9121 KTW → HRG Jul 21, 02:10 UTCJul 21, 11:15 UTC9h 5m
2026-07-20 UTN9124 - Jul 20, 13:10 UTCJul 20, 22:10 UTC9h 0m
2026-07-20 UTN9127 KTW → HRG Jul 20, 02:30 UTCJul 20, 11:40 UTC9h 10m
2026-07-19 UTN9126 HRG → KTW Jul 19, 13:05 UTCJul 20, 00:20 UTC11h 15m
2026-07-19 UTN2226 HRG → WAW Jul 19, 02:20 UTCJul 19, 11:30 UTC9h 10m
2026-07-18 UTN9122 - Jul 18, 12:40 UTCJul 18, 23:15 UTC10h 35m
2026-07-18 UTN9121 - Jul 18, 02:14 UTCJul 18, 11:10 UTC8h 56m
2026-07-17 UTN7421 POZ → POZ Jul 17, 13:05 UTCJul 17, 23:10 UTC10h 5m
2026-07-17 UTN7422 POZ → POZ Jul 17, 07:40 UTCJul 17, 11:35 UTC3h 55m
2026-07-17 UTN9123 - Jul 17, 01:49 UTCJul 17, 05:10 UTC3h 20m
2026-07-16 UTN9122 - Jul 16, 12:49 UTCJul 16, 22:19 UTC9h 30m
2026-07-16 UTN2324 - Jul 16, 02:15 UTCJul 16, 11:30 UTC9h 15m
2026-07-15 UTN9148 - Jul 15, 01:10 UTCJul 15, 10:45 UTC9h 35m
2026-07-14 UTN9122 - Jul 14, 12:30 UTCJul 14, 23:10 UTC10h 39m
2026-07-14 UTN9121 - Jul 14, 02:00 UTCJul 14, 11:05 UTC9h 5m
2026-07-13 UTN9124 - Jul 13, 13:55 UTCJul 13, 22:30 UTC8h 35m
2026-07-13 UTN9127 - Jul 13, 03:01 UTCJul 13, 12:30 UTC9h 30m
2026-07-12 UTN2225 - Jul 12, 12:55 UTCJul 13, 00:05 UTC11h 10m
2026-07-12 UTN2226 - Jul 12, 07:40 UTCJul 12, 11:25 UTC3h 45m
2026-07-12 UTN9125 - Jul 12, 02:05 UTCJul 12, 05:30 UTC3h 25m
2026-07-11 UTN9122 BUD → KTW Jul 11, 12:45 UTCJul 11, 23:20 UTC10h 35m
2026-07-11 UTN9121 - Jul 11, 02:15 UTCJul 11, 11:15 UTC9h 0m
2026-07-10 UTN9124 - Jul 10, 19:25 UTCJul 10, 23:00 UTC3h 35m
2026-07-10 UTN7421 - Jul 10, 12:55 UTCJul 10, 16:35 UTC3h 40m
2026-07-10 UTN7422 - Jul 10, 01:55 UTCJul 10, 11:30 UTC9h 35m
2026-07-09 UTN9122 - Jul 9, 12:55 UTCJul 9, 22:30 UTC9h 35m
2026-07-09 UTN9121 - Jul 9, 02:05 UTCJul 9, 11:30 UTC9h 25m
2026-07-08 UTN9148 - Jul 8, 01:00 UTCJul 8, 10:30 UTC9h 30m
2026-07-07 UTN9122 HRG → KTW Jul 7, 12:20 UTCJul 7, 23:20 UTC11h 0m
2026-07-07 UTN9121 - Jul 7, 02:10 UTCJul 7, 11:10 UTC9h 0m
2026-07-06 UTN9124 - Jul 6, 20:15 UTCJul 6, 23:05 UTC2h 50m
2026-07-06 UTN3623 - Jul 6, 14:20 UTCJul 6, 20:10 UTC5h 50m
2026-07-06 UTN3624 - Jul 6, 08:50 UTCJul 6, 11:55 UTC3h 5m
2026-07-05 UTN9126 - Jul 5, 14:40 UTCJul 6, 00:10 UTC9h 30m
2026-07-05 UTN2226 - Jul 5, 01:50 UTCJul 5, 11:25 UTC9h 35m
2026-07-04 UTN9122 HRG → KTW Jul 4, 12:40 UTCJul 4, 23:20 UTC10h 40m
2026-07-04 UTN3624 - Jul 4, 01:55 UTCJul 4, 11:10 UTC9h 15m
2026-07-03 UTN7421 - Jul 3, 13:15 UTCJul 3, 22:45 UTC9h 30m
2026-07-03 UTN7422 - Jul 3, 02:00 UTCJul 3, 12:00 UTC10h 0m

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 UR-AZE page for operator, model, and routing details .

Mode-S 50840A frequently asked

What is Mode-S code 50840A?
50840A is an ICAO 24-bit transponder address. Allocated to Ukraine. Assigned to UR-AZE.
Where is Mode-S 50840A registered?
Mode-S code 50840A is allocated to Ukraine (UA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 50840A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 50840A, octal 24102012, decimal 5,276,682.
What flights does 50840A operate?
Mode-S 50840A has broadcast 20 distinct callsigns, including UTN9122, UTN9121, UTN9124, UTN7422, UTN7421.