sensors Mode-S transponder
4CA2BB
ICAO 24-bit transponder address · allocated to Ireland
- Hex
- 4CA2BB
- Octal
- 23121273
- Decimal
- 5,022,395
- Country
- IE
- Flights observed
- 25
- Distinct callsigns
- 18
- Country
- IE
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 4CA2BB falls within the block assigned to Ireland (IE) by ICAO Annex 10, Volume III. Every aircraft registered in Ireland 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 18 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| RYR99BQ | Ryanair | 5 | 2026-06-21 |
| RYR8CX | Ryanair | 2 | 2026-06-11 |
| RYR40SX | - | 2 | 2026-06-30 |
| RYR9LH | Ryanair | 1 | 2026-04-29 |
| RYR992U | Ryanair | 1 | 2026-07-24 |
| RYR90QC | - | 1 | 2026-07-15 |
| RYR8G | Ryanair | 1 | 2026-06-13 |
| RYR7QJ | Ryanair | 1 | 2026-04-26 |
| RYR7DM | - | 1 | 2026-06-23 |
| RYR73KY | - | 1 | 2026-07-02 |
| RYR68EL | Ryanair | 1 | 2026-06-15 |
| RYR59WU | Ryanair | 1 | 2026-06-09 |
| RYR576P | - | 1 | 2026-07-26 |
| RYR4WF | Ryanair | 1 | 2026-04-29 |
| RYR40ND | Ryanair | 1 | 2026-06-09 |
| RYR2TT | Ryanair | 1 | 2026-04-27 |
| RYR22PG | - | 1 | 2026-06-20 |
| RYR22GT | Ryanair | 1 | 2026-04-28 |
Recent flights last 25
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | RYR576P | - | Jul 26, 08:40 UTC | Jul 26, 08:50 UTC | 10m |
| 2026-07-24 | RYR992U | STN → SNN | Jul 24, 18:30 UTC | Jul 25, 15:20 UTC | 20h 50m |
| 2026-07-15 | RYR90QC | - | Jul 15, 06:40 UTC | Jul 15, 08:25 UTC | 1h 45m |
| 2026-07-02 | RYR73KY | - | Jul 2, 10:25 UTC | Jul 2, 10:40 UTC | 15m |
| 2026-06-30 | RYR40SX | - | Jun 30, 12:50 UTC | Jun 30, 15:20 UTC | 2h 30m |
| 2026-06-29 | RYR40SX | - | Jun 29, 19:49 UTC | Jun 30, 15:20 UTC | 19h 31m |
| 2026-06-23 | RYR7DM | - | Jun 23, 08:00 UTC | Jun 23, 08:15 UTC | 15m |
| 2026-06-21 | RYR99BQ | NTE → EDI | Jun 21, 20:54 UTC | Jun 22, 17:34 UTC | 20h 40m |
| 2026-06-21 | RYR99BQ | NTE → EDI | Jun 21, 10:29 UTC | Jun 21, 21:05 UTC | 10h 35m |
| 2026-06-20 | RYR22PG | - | Jun 20, 08:44 UTC | Jun 20, 08:55 UTC | 10m |
| 2026-06-15 | RYR68EL | EDI → BZR | Jun 15, 17:20 UTC | Jun 16, 11:20 UTC | 18h 0m |
| 2026-06-14 | RYR99BQ | NTE → EDI | Jun 14, 20:00 UTC | Jun 15, 17:25 UTC | 21h 24m |
| 2026-06-14 | RYR99BQ | NTE → EDI | Jun 14, 09:40 UTC | Jun 14, 20:15 UTC | 10h 35m |
| 2026-06-13 | RYR99BQ | NTE → EDI | Jun 13, 21:45 UTC | Jun 14, 20:15 UTC | 22h 30m |
| 2026-06-13 | RYR8G | BUD → ATH | Jun 13, 14:35 UTC | Jun 14, 09:45 UTC | 19h 10m |
| 2026-06-11 | RYR8CX | BLL → MAD | Jun 11, 00:50 UTC | Jun 11, 12:30 UTC | 11h 40m |
| 2026-06-10 | RYR8CX | BLL → MAD | Jun 10, 07:40 UTC | Jun 11, 01:05 UTC | 17h 25m |
| 2026-06-09 | RYR40ND | BVA → DUB | Jun 9, 20:00 UTC | Jun 10, 07:50 UTC | 11h 50m |
| 2026-06-09 | RYR59WU | DUB → LTN | Jun 9, 07:40 UTC | Jun 9, 07:50 UTC | 10m |
| 2026-06-04 | - | - | Jun 4, 06:50 UTC | Jun 4, 07:00 UTC | 10m |
| 2026-04-29 | RYR4WF | BCN → EMA | Apr 29, 18:25 UTC | Apr 30, 08:25 UTC | 13h 59m |
| 2026-04-29 | RYR9LH | STN → BCN | Apr 29, 06:59 UTC | Apr 29, 17:05 UTC | 10h 6m |
| 2026-04-28 | RYR22GT | EMA → BCN | Apr 28, 21:10 UTC | Apr 28, 21:19 UTC | 10m |
| 2026-04-27 | RYR2TT | BLL → SVQ | Apr 27, 16:30 UTC | Apr 28, 07:55 UTC | 15h 25m |
| 2026-04-26 | RYR7QJ | VST → AGP | Apr 26, 19:30 UTC | Apr 26, 19:40 UTC | 10m |
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.