Apparatus

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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 10d ago
Flights observed
336
Distinct callsigns
20
Country
RO
Last broadcast
10d 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
AIZ411 Arkia Israel Airlines 21 2026-07-18
AIZ412 Arkia Israel Airlines 15 2026-07-25
AIZ142 - 15 2026-07-24
AIZ141 - 14 2026-07-24
AIZ1223 Arkia Israel Airlines 13 2026-07-26
AIZ224 Arkia Israel Airlines 12 2026-07-26
AIZ367 Arkia Israel Airlines 9 2026-07-23
AIZ1161 - 9 2026-07-19
AIZ94 - 8 2026-07-16
AIZ368 - 7 2026-07-23
AIZ222 - 7 2026-07-26
AIZ221 Arkia Israel Airlines 7 2026-07-26
AIZ1412 Arkia Israel Airlines 7 2026-07-17
AIZ338 Arkia Israel Airlines 6 2026-07-21
AIZ337 Arkia Israel Airlines 6 2026-07-21
AIZ162 - 6 2026-07-19
AIZ344 - 5 2026-07-11
AIZ343 - 5 2026-07-11
AIZ122 - 5 2026-07-24
AIZ121 Arkia Israel Airlines 5 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AIZ745 TLV → CDG Jul 26, 20:05 UTCJul 26, 22:45 UTC2h 40m
2026-07-26 AIZ224 SKG → TLV Jul 26, 15:50 UTCJul 26, 17:50 UTC2h 0m
2026-07-26 AIZ1223 TLV → SKG Jul 26, 12:35 UTCJul 26, 14:45 UTC2h 10m
2026-07-26 AIZ222 - Jul 26, 09:05 UTCJul 26, 10:55 UTC1h 50m
2026-07-26 AIZ221 TLV → ATH Jul 26, 05:05 UTCJul 26, 06:45 UTC1h 41m
2026-07-25 AIZ412 TIA → TLV Jul 25, 19:20 UTCJul 25, 21:20 UTC2h 0m
2026-07-25 AIZ1411 TLV → EVN Jul 25, 14:25 UTCJul 25, 16:45 UTC2h 20m
2026-07-25 AIZ172 PVK → TLV Jul 25, 11:15 UTCJul 25, 13:00 UTC1h 45m
2026-07-25 AIZ171 TLV → PVK Jul 25, 07:40 UTCJul 25, 09:35 UTC1h 55m
2026-07-25 AIZ170 LCA → TLV Jul 25, 05:35 UTCJul 25, 06:15 UTC40m
2026-07-25 AIZ169 TLV → LCA Jul 25, 03:35 UTCJul 25, 04:15 UTC40m
2026-07-25 AIZ52 CFU → TLV Jul 25, 00:25 UTCJul 25, 02:10 UTC1h 45m
2026-07-24 AIZ53 TLV → CFU Jul 24, 20:55 UTCJul 24, 23:00 UTC2h 5m
2026-07-24 AIZ122 - Jul 24, 12:50 UTCJul 24, 14:20 UTC1h 30m
2026-07-24 AIZ121 TLV → JMK Jul 24, 09:50 UTCJul 24, 11:20 UTC1h 30m
2026-07-24 AIZ142 - Jul 24, 07:00 UTCJul 24, 08:10 UTC1h 10m
2026-07-24 AIZ141 - Jul 24, 04:10 UTCJul 24, 05:05 UTC55m
2026-07-23 AIZ1166 LCA → TLV Jul 23, 22:45 UTCJul 23, 23:30 UTC45m
2026-07-23 AIZ1165 TLV → LCA Jul 23, 20:50 UTCJul 23, 21:30 UTC40m
2026-07-23 AIZ368 - Jul 23, 17:15 UTCJul 23, 19:15 UTC2h 0m
2026-07-23 AIZ367 SOF → VAR Jul 23, 12:20 UTCJul 23, 14:45 UTC2h 25m
2026-07-23 AIZ222 - Jul 23, 08:25 UTCJul 23, 10:05 UTC1h 40m
2026-07-23 AIZ221 TLV → ATH Jul 23, 05:10 UTCJul 23, 07:00 UTC1h 50m
2026-07-22 AIZ1224 SKG → TLV Jul 22, 19:35 UTCJul 22, 21:35 UTC2h 0m
2026-07-22 AIZ1223 TLV → SKG Jul 22, 15:50 UTCJul 22, 17:50 UTC2h 0m
2026-07-22 AIZ532 AMS → TLV Jul 22, 03:15 UTCJul 22, 13:55 UTC10h 40m
2026-07-21 AIZ428 - Jul 21, 20:35 UTCJul 21, 23:15 UTC2h 40m
2026-07-21 AIZ427 - Jul 21, 16:15 UTCJul 21, 19:10 UTC2h 55m
2026-07-21 AIZ338 MXP → TLV Jul 21, 10:25 UTCJul 21, 13:40 UTC3h 15m
2026-07-21 AIZ337 TLV → MXP Jul 21, 03:55 UTCJul 21, 07:45 UTC3h 50m
2026-07-20 AIZ532 BRU → TLV Jul 20, 18:35 UTCJul 20, 22:30 UTC3h 55m
2026-07-20 AIZ531 - Jul 20, 12:05 UTCJul 20, 16:25 UTC4h 20m
2026-07-20 AIZ142 - Jul 20, 08:30 UTCJul 20, 09:45 UTC1h 15m
2026-07-20 AIZ141 - Jul 20, 05:40 UTCJul 20, 06:35 UTC55m
2026-07-19 AIZ162 LCA → TLV Jul 19, 22:25 UTCJul 19, 23:00 UTC35m
2026-07-19 AIZ1161 - Jul 19, 19:25 UTCJul 19, 20:10 UTC45m
2026-07-19 AIZ224 SKG → TLV Jul 19, 16:15 UTCJul 19, 18:10 UTC1h 55m
2026-07-19 AIZ1223 TLV → SKG Jul 19, 12:35 UTCJul 19, 14:40 UTC2h 5m
2026-07-19 AIZ222 - Jul 19, 08:30 UTCJul 19, 10:25 UTC1h 55m
2026-07-19 AIZ221 - Jul 19, 05:00 UTCJul 19, 06:40 UTC1h 40m
2026-07-18 AIZ412 TIA → TLV Jul 18, 19:00 UTCJul 18, 21:00 UTC2h 0m
2026-07-18 AIZ411 TLV → TIA Jul 18, 14:45 UTCJul 18, 17:00 UTC2h 15m
2026-07-18 AIZ172 PVK → TLV Jul 18, 11:30 UTCJul 18, 13:20 UTC1h 50m
2026-07-18 AIZ171 TLV → PVK Jul 18, 07:35 UTCJul 18, 09:40 UTC2h 5m
2026-07-17 AIZ1412 TIA → TLV Jul 17, 20:50 UTCJul 17, 22:55 UTC2h 5m
2026-07-17 AIZ411 TLV → TIA Jul 17, 16:19 UTCJul 17, 18:34 UTC2h 15m
2026-07-17 AIZ122 JMK → TLV Jul 17, 12:55 UTCJul 17, 14:24 UTC1h 30m
2026-07-17 AIZ121 TLV → JMK Jul 17, 10:10 UTCJul 17, 11:39 UTC1h 30m
2026-07-17 AIZ142 AOK → TLV Jul 17, 07:25 UTCJul 17, 08:40 UTC1h 15m
2026-07-17 AIZ141 - Jul 17, 04:44 UTCJul 17, 05:35 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 10d 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 AIZ411, AIZ412, AIZ142, AIZ141, AIZ1223.