sensors Mode-S transponder
4D21C2
ICAO 24-bit transponder address · allocated to Malta
Currently assigned to 9H-NYC · EMBRAER ERJ-190-100
- Hex
- 4D21C2
- Octal
- 23220702
- Decimal
- 5,054,914
- Country
- MT
- Tail
- 9H-NYC
- Type
- E190
- Flights observed
- 81
- Distinct callsigns
- 20
- Country
- MT
- Last broadcast
- 20h ago
Last known position
Country allocation
The ICAO 24-bit address 4D21C2 falls within the block assigned to Malta (MT) by ICAO Annex 10, Volume III. Every aircraft registered in Malta 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 |
|---|---|---|---|
| AXY626U | - | 3 | 2026-06-08 |
| AXY842T | - | 2 | 2026-06-16 |
| AXY611K | - | 2 | 2026-06-21 |
| AXY293V | - | 2 | 2026-06-04 |
| AXY133C | - | 2 | 2026-04-13 |
| AXY99NR | - | 1 | 2026-05-27 |
| AXY994Y | - | 1 | 2026-07-09 |
| AXY974K | - | 1 | 2026-06-14 |
| AXY969W | - | 1 | 2026-07-10 |
| AXY967P | - | 1 | 2026-07-09 |
| AXY963T | - | 1 | 2026-06-26 |
| AXY962M | - | 1 | 2026-07-07 |
| AXY944V | - | 1 | 2026-06-09 |
| AXY937C | - | 1 | 2026-05-09 |
| AXY932Q | - | 1 | 2026-05-30 |
| AXY924S | - | 1 | 2026-06-08 |
| AXY878X | - | 1 | 2026-06-15 |
| AXY872X | - | 1 | 2026-06-30 |
| AXY869U | - | 1 | 2026-05-31 |
| AXY856T | - | 1 | 2026-05-27 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | AXY2206 | - | Jul 13, 06:35 UTC | Jul 13, 15:05 UTC | 8h 30m |
| 2026-07-13 | AXY2205 | - | Jul 13, 02:45 UTC | Jul 13, 04:25 UTC | 1h 40m |
| 2026-07-11 | AXY324C | BCN → MDW | Jul 11, 23:20 UTC | Jul 12, 09:35 UTC | 10h 15m |
| 2026-07-10 | AXY969W | BQH → BCN | Jul 10, 16:35 UTC | Jul 10, 18:15 UTC | 1h 40m |
| 2026-07-09 | AXY967P | LIN → BQH | Jul 9, 12:45 UTC | Jul 9, 14:15 UTC | 1h 30m |
| 2026-07-09 | AXY994Y | - | Jul 9, 10:00 UTC | Jul 9, 11:05 UTC | 1h 5m |
| 2026-07-07 | AXY962M | LTN → LBG | Jul 7, 11:05 UTC | Jul 7, 12:00 UTC | 55m |
| 2026-07-07 | AXY755E | - | Jul 7, 08:25 UTC | Jul 7, 09:05 UTC | 40m |
| 2026-07-06 | AXY305G | JMK → HUY | Jul 6, 10:55 UTC | Jul 6, 14:30 UTC | 3h 35m |
| 2026-07-06 | AXY467X | AYT → JMK | Jul 6, 08:40 UTC | Jul 6, 09:40 UTC | 1h 0m |
| 2026-07-05 | AXY316H | - | Jul 5, 16:05 UTC | Jul 5, 20:10 UTC | 4h 5m |
| 2026-07-05 | AXY572L | - | Jul 5, 13:40 UTC | Jul 5, 14:55 UTC | 1h 15m |
| 2026-07-04 | AXY498S | - | Jul 4, 07:15 UTC | Jul 4, 11:35 UTC | 4h 20m |
| 2026-07-03 | AXY476J | IBZ → LBG | Jul 3, 13:15 UTC | Jul 3, 15:05 UTC | 1h 50m |
| 2026-07-03 | AXY337D | - | Jul 3, 10:35 UTC | Jul 3, 12:20 UTC | 1h 45m |
| 2026-07-03 | AXY602A | - | Jul 3, 08:30 UTC | Jul 3, 09:30 UTC | 1h 0m |
| 2026-07-01 | AXY601B | IAD → NCE | Jul 1, 22:35 UTC | Jul 2, 06:41 UTC | 8h 6m |
| 2026-07-01 | AXY018H | - | Jul 1, 19:10 UTC | Jul 1, 20:40 UTC | 1h 30m |
| 2026-06-30 | AXY872X | - | Jun 30, 08:20 UTC | Jun 30, 10:20 UTC | 2h 0m |
| 2026-06-28 | AXY794W | - | Jun 28, 17:19 UTC | Jun 28, 18:25 UTC | 1h 5m |
| 2026-06-28 | AXY221P | - | Jun 28, 15:09 UTC | Jun 28, 16:25 UTC | 1h 15m |
| 2026-06-28 | AXY797P | - | Jun 28, 07:14 UTC | Jun 28, 09:10 UTC | 1h 55m |
| 2026-06-26 | AXY963T | - | Jun 26, 16:35 UTC | Jun 26, 17:09 UTC | 35m |
| 2026-06-26 | AXY852Z | - | Jun 26, 11:20 UTC | Jun 26, 13:40 UTC | 2h 20m |
| 2026-06-24 | AXY153U | - | Jun 24, 07:24 UTC | Jun 24, 09:05 UTC | 1h 40m |
| 2026-06-24 | AXY471Q | - | Jun 24, 04:44 UTC | Jun 24, 06:25 UTC | 1h 40m |
| 2026-06-21 | AXY780A | NCE → LBG | Jun 21, 21:29 UTC | Jun 22, 10:34 UTC | 13h 5m |
| 2026-06-21 | AXY611K | - | Jun 21, 01:10 UTC | Jun 21, 04:49 UTC | 3h 40m |
| 2026-06-20 | AXY611K | - | Jun 20, 04:39 UTC | Jun 21, 04:30 UTC | 23h 50m |
| 2026-06-16 | AXY842T | - | Jun 16, 12:14 UTC | Jun 16, 13:19 UTC | 1h 5m |
| 2026-06-16 | AXY842T | - | Jun 16, 09:15 UTC | Jun 16, 09:25 UTC | 10m |
| 2026-06-15 | AXY878X | - | Jun 15, 14:20 UTC | Jun 15, 18:29 UTC | 4h 10m |
| 2026-06-15 | AXY422T | - | Jun 15, 09:54 UTC | Jun 15, 13:00 UTC | 3h 5m |
| 2026-06-14 | AXY703X | - | Jun 14, 15:40 UTC | Jun 14, 16:20 UTC | 40m |
| 2026-06-14 | AXY390W | GVA → FAB | Jun 14, 13:15 UTC | Jun 14, 14:40 UTC | 1h 25m |
| 2026-06-14 | AXY974K | LIN → GVA | Jun 14, 10:50 UTC | Jun 14, 11:30 UTC | 40m |
| 2026-06-13 | AXY811J | - | Jun 13, 18:45 UTC | Jun 13, 20:10 UTC | 1h 25m |
| 2026-06-12 | AXY7626 | - | Jun 12, 01:10 UTC | Jun 12, 06:30 UTC | 5h 20m |
| 2026-06-10 | AXY651G | - | Jun 10, 11:55 UTC | Jun 10, 14:05 UTC | 2h 10m |
| 2026-06-10 | AXY552F | - | Jun 10, 08:10 UTC | Jun 10, 09:50 UTC | 1h 40m |
| 2026-06-09 | AXY944V | - | Jun 9, 16:45 UTC | Jun 9, 17:00 UTC | 15m |
| 2026-06-08 | AXY924S | - | Jun 8, 19:45 UTC | Jun 8, 21:20 UTC | 1h 35m |
| 2026-06-08 | AXY382C | JMK → NCE | Jun 8, 15:04 UTC | Jun 8, 17:45 UTC | 2h 40m |
| 2026-06-08 | AXY626U | - | Jun 8, 09:20 UTC | Jun 8, 13:30 UTC | 4h 10m |
| 2026-06-07 | AXY626U | - | Jun 7, 17:35 UTC | Jun 8, 13:30 UTC | 19h 55m |
| 2026-06-07 | AXY626U | - | Jun 7, 14:35 UTC | Jun 8, 13:30 UTC | 22h 55m |
| 2026-06-06 | AXY282P | - | Jun 6, 10:04 UTC | Jun 6, 11:30 UTC | 1h 25m |
| 2026-06-05 | AXY362G | - | Jun 5, 13:20 UTC | Jun 5, 14:55 UTC | 1h 35m |
| 2026-06-05 | AXY226H | - | Jun 5, 08:15 UTC | Jun 5, 11:20 UTC | 3h 5m |
| 2026-06-04 | AXY715W | LIS → HAM | Jun 4, 09:05 UTC | Jun 4, 11:45 UTC | 2h 40m |
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 9H-NYC page for operator, model, and routing details .