Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4A3123

ICAO 24-bit transponder address · allocated to Romania

Currently assigned to YR-LIC · AIRBUS A-319

Hex
4A3123
Octal
22430443
Decimal
4,862,243
Country
RO
Tail
YR-LIC
Type
A319
No current signal · last broadcast 4h ago
Flights observed
171
Distinct callsigns
20
Country
RO
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 4A3123.

Country allocation

The ICAO 24-bit address 4A3123 falls within the block assigned to Romania (RO) by ICAO Annex 10, Volume III. Every aircraft registered in Romania 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
AIZ142 - 8 2026-06-19
AIZ411 Arkia Israel Airlines 7 2026-06-20
AIZ224 Arkia Israel Airlines 7 2026-06-21
AIZ141 - 7 2026-06-19
AIZ1223 Arkia Israel Airlines 7 2026-06-21
AIZ1161 Arkia Israel Airlines 7 2026-06-03
AIZ412 Arkia Israel Airlines 6 2026-06-20
AIZ94 Arkia Israel Airlines 5 2026-06-18
AIZ368 - 5 2026-05-22
AIZ367 Arkia Israel Airlines 5 2026-05-22
AIZ164 Arkia Israel Airlines 4 2026-06-09
AIZ163 Arkia Israel Airlines 4 2026-06-09
AIZ162 Arkia Israel Airlines 4 2026-06-03
AIZ1162 Arkia Israel Airlines 4 2026-05-23
AIZ808 Arkia Israel Airlines 3 2026-06-16
AIZ807 Arkia Israel Airlines 3 2026-06-16
AIZ93 Arkia Israel Airlines 2 2026-05-17
AIZ816 Arkia Israel Airlines 2 2026-06-16
AIZ815 Arkia Israel Airlines 2 2026-06-16
AIZ803 Arkia Israel Airlines 2 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-21 AIZ224 SKG → TLV Jun 21, 16:19 UTCJun 21, 16:44 UTC25m
2026-06-21 AIZ1223 TLV → SKG Jun 21, 11:24 UTCJun 21, 14:34 UTC3h 10m
2026-06-21 AIZ166 - Jun 21, 10:29 UTCJun 21, 11:10 UTC40m
2026-06-21 AIZ165 - Jun 21, 07:55 UTCJun 21, 08:30 UTC35m
2026-06-20 AIZ412 TIA → TLV Jun 20, 21:00 UTCJun 20, 23:04 UTC2h 5m
2026-06-20 AIZ411 TLV → TIA Jun 20, 16:29 UTCJun 20, 18:49 UTC2h 20m
2026-06-20 AIZ344 VRN → TLV Jun 20, 08:29 UTCJun 20, 11:49 UTC3h 20m
2026-06-20 AIZ343 TLV → VCE Jun 20, 02:40 UTCJun 20, 04:44 UTC2h 5m
2026-06-19 AIZ292 BUD → TLV Jun 19, 16:39 UTCJun 19, 19:29 UTC2h 50m
2026-06-19 AIZ291 TLV → BUD Jun 19, 11:14 UTCJun 19, 14:54 UTC3h 40m
2026-06-19 AIZ142 - Jun 19, 07:29 UTCJun 19, 08:40 UTC1h 10m
2026-06-19 AIZ141 - Jun 19, 04:34 UTCJun 19, 05:34 UTC1h 0m
2026-06-19 AIZ412 TIA → TLV Jun 19, 00:10 UTCJun 19, 02:14 UTC2h 5m
2026-06-18 AIZ411 TLV → TIA Jun 18, 19:30 UTCJun 18, 21:45 UTC2h 15m
2026-06-18 AIZ94 HER → TLV Jun 18, 14:01 UTCJun 18, 18:05 UTC4h 5m
2026-06-18 AIZ336 FCO → TLV Jun 18, 08:40 UTCJun 18, 11:45 UTC3h 5m
2026-06-18 AIZ1335 TLV → FCO Jun 18, 03:15 UTCJun 18, 06:25 UTC3h 10m
2026-06-17 AIZ412 TIA → TLV Jun 17, 21:10 UTCJun 17, 23:15 UTC2h 5m
2026-06-17 AIZ411 TLV → TIA Jun 17, 16:10 UTCJun 17, 18:30 UTC2h 20m
2026-06-17 AIZ156 PFO → TLV Jun 17, 13:25 UTCJun 17, 14:15 UTC50m
2026-06-17 AIZ155 TLV → PFO Jun 17, 10:00 UTCJun 17, 10:45 UTC45m
2026-06-16 AIZ816 ETM → TLV Jun 16, 12:50 UTCJun 16, 13:19 UTC30m
2026-06-16 AIZ815 TLV → ETM Jun 16, 11:05 UTCJun 16, 11:25 UTC20m
2026-06-16 AIZ808 ETM → TLV Jun 16, 09:04 UTCJun 16, 09:30 UTC25m
2026-06-16 AIZ807 TLV → AQJ Jun 16, 07:15 UTCJun 16, 07:40 UTC25m
2026-06-15 AIZ354 - Jun 15, 15:00 UTCJun 15, 17:10 UTC2h 10m
2026-06-15 AIZ353 TLV → RZE Jun 15, 11:10 UTCJun 15, 13:15 UTC2h 5m
2026-06-15 AIZ142 - Jun 15, 08:35 UTCJun 15, 09:35 UTC1h 0m
2026-06-15 AIZ141 - Jun 15, 05:35 UTCJun 15, 06:24 UTC50m
2026-06-14 AIZ54 CFU → TLV Jun 14, 16:50 UTCJun 14, 18:45 UTC1h 55m
2026-06-14 AIZ224 SKG → TLV Jun 14, 09:55 UTCJun 14, 15:15 UTC5h 20m
2026-06-14 AIZ1223 TLV → SKG Jun 14, 06:00 UTCJun 14, 08:20 UTC2h 20m
2026-06-13 AIZ412 TIA → TLV Jun 13, 21:00 UTCJun 13, 23:00 UTC2h 0m
2026-06-13 AIZ411 TLV → TIA Jun 13, 14:25 UTCJun 13, 16:40 UTC2h 15m
2026-06-13 AIZ172 - Jun 13, 09:00 UTCJun 13, 10:50 UTC1h 50m
2026-06-13 AIZ171 - Jun 13, 04:55 UTCJun 13, 06:50 UTC1h 55m
2026-06-12 AIZ54 CFU → TLV Jun 12, 14:05 UTCJun 12, 16:00 UTC1h 55m
2026-06-12 AIZ53 TLV → CFU Jun 12, 10:10 UTCJun 12, 12:10 UTC2h 0m
2026-06-12 AIZ142 - Jun 12, 07:50 UTCJun 12, 08:45 UTC55m
2026-06-12 AIZ141 - Jun 12, 04:50 UTCJun 12, 06:00 UTC1h 10m
2026-06-11 AIZ224 SKG → TLV Jun 11, 20:05 UTCJun 11, 22:05 UTC2h 0m
2026-06-11 AIZ1223 TLV → SKG Jun 11, 16:30 UTCJun 11, 18:45 UTC2h 15m
2026-06-11 AIZ292 BUD → TLV Jun 11, 12:20 UTCJun 11, 15:15 UTC2h 55m
2026-06-11 AIZ1293 TLV → BUD Jun 11, 07:55 UTCJun 11, 10:55 UTC3h 0m
2026-06-10 AIZ1412 - Jun 10, 16:55 UTCJun 10, 19:05 UTC2h 10m
2026-06-10 AIZ411 TLV → TIA Jun 10, 12:20 UTCJun 10, 14:35 UTC2h 15m
2026-06-09 AIZ164 LCA → PFO Jun 9, 13:30 UTCJun 9, 14:10 UTC40m
2026-06-09 AIZ163 TLV → LCA Jun 9, 11:30 UTCJun 9, 12:10 UTC40m
2026-06-09 AIZ154 PFO → TLV Jun 9, 08:50 UTCJun 9, 09:35 UTC45m
2026-06-09 AIZ151 TLV → PFO Jun 9, 06:40 UTCJun 9, 07:30 UTC50m

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 YR-LIC page for operator, model, and routing details .

Mode-S 4A3123 frequently asked

What is Mode-S code 4A3123?
4A3123 is an ICAO 24-bit transponder address. Allocated to Romania. Assigned to YR-LIC.
Where is Mode-S 4A3123 registered?
Mode-S code 4A3123 is allocated to Romania (RO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4A3123 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4A3123, octal 22430443, decimal 4,862,243.
What flights does 4A3123 operate?
Mode-S 4A3123 has broadcast 20 distinct callsigns, including AIZ142, AIZ411, AIZ224, AIZ141, AIZ1223.