sensors Mode-S transponder
770594
ICAO 24-bit transponder address · allocated to Sri Lanka
Currently assigned to 4R-ALT · AIRBUS A-330-300
- Hex
- 770594
- Octal
- 35602624
- Decimal
- 7,800,212
- Country
- LK
- Tail
- 4R-ALT
- Type
- A333
- Flights observed
- 84
- Distinct callsigns
- 20
- Country
- LK
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 770594 falls within the block assigned to Sri Lanka (LK) by ICAO Annex 10, Volume III. Every aircraft registered in Sri Lanka 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 |
|---|---|---|---|
| ALK308 | SriLankan Airlines | 15 | 2026-05-24 |
| ALK89L | SriLankan Airlines | 8 | 2026-05-30 |
| ALK26L | SriLankan Airlines | 7 | 2026-05-14 |
| ALK25L | SriLankan Airlines | 7 | 2026-05-08 |
| ALK309 | SriLankan Airlines | 6 | 2026-05-24 |
| ALK115 | SriLankan Airlines | 5 | 2026-05-28 |
| ALK90L | SriLankan Airlines | 4 | 2026-05-22 |
| ALK102 | SriLankan Airlines | 4 | 2026-05-26 |
| ALK404 | SriLankan Airlines | 3 | 2026-05-21 |
| ALK121 | SriLankan Airlines | 3 | 2026-05-13 |
| ALK884 | SriLankan Airlines | 2 | 2026-05-25 |
| ALK405 | SriLankan Airlines | 2 | 2026-05-14 |
| ALK266 | SriLankan Airlines | 2 | 2026-05-27 |
| ALK122 | SriLankan Airlines | 2 | 2026-05-13 |
| ALK116 | SriLankan Airlines | 2 | 2026-05-18 |
| ALK103 | SriLankan Airlines | 2 | 2026-05-07 |
| ALK101 | SriLankan Airlines | 2 | 2026-04-24 |
| ALK885 | SriLankan Airlines | 1 | 2026-05-25 |
| ALK314 | SriLankan Airlines | 1 | 2026-04-20 |
| ALK265 | SriLankan Airlines | 1 | 2026-05-29 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | ALK89L | CMB → TRZ | May 30, 04:50 UTC | May 30, 05:00 UTC | 10m |
| 2026-05-29 | ALK265 | CMB → RUH | May 29, 13:15 UTC | May 30, 00:15 UTC | 11h 0m |
| 2026-05-28 | ALK115 | CMB → MLE | May 28, 08:35 UTC | May 28, 11:20 UTC | 2h 45m |
| 2026-05-27 | ALK266 | RUH → CMB | May 27, 13:20 UTC | May 28, 00:05 UTC | 10h 45m |
| 2026-05-26 | ALK102 | MLE → CMB | May 26, 11:20 UTC | May 27, 05:29 UTC | 18h 10m |
| 2026-05-26 | ALK102 | MLE → CMB | May 26, 08:34 UTC | May 27, 05:29 UTC | 20h 55m |
| 2026-05-25 | ALK885 | CAN → CMB | May 25, 20:19 UTC | May 26, 11:30 UTC | 15h 10m |
| 2026-05-25 | ALK884 | CMB → CAN | May 25, 17:20 UTC | May 25, 17:30 UTC | 10m |
| 2026-05-25 | ALK884 | CMB → CAN | May 25, 15:05 UTC | May 25, 15:50 UTC | 45m |
| 2026-05-24 | ALK309 | SIN → CMB | May 24, 12:50 UTC | May 24, 13:30 UTC | 40m |
| 2026-05-24 | ALK308 | CMB → SIN | May 24, 09:50 UTC | May 24, 11:10 UTC | 1h 20m |
| 2026-05-23 | ALK308 | CMB → SIN | May 23, 11:10 UTC | May 24, 11:00 UTC | 23h 50m |
| 2026-05-23 | ALK115 | CMB → MLE | May 23, 08:20 UTC | May 23, 11:25 UTC | 3h 5m |
| 2026-05-22 | ALK90L | DAC → CMB | May 22, 07:20 UTC | May 23, 02:55 UTC | 19h 34m |
| 2026-05-22 | ALK89L | CMB → TRZ | May 22, 05:00 UTC | May 22, 05:25 UTC | 25m |
| 2026-05-21 | ALK89L | CMB → TRZ | May 21, 07:35 UTC | May 22, 05:25 UTC | 21h 50m |
| 2026-05-21 | ALK404 | CMB → BKK | May 21, 05:00 UTC | May 21, 05:30 UTC | 30m |
| 2026-05-18 | ALK116 | MLE → CMB | May 18, 08:55 UTC | May 18, 11:35 UTC | 2h 40m |
| 2026-05-16 | ALK309 | SIN → CMB | May 16, 13:31 UTC | May 16, 14:11 UTC | 40m |
| 2026-05-16 | ALK308 | CMB → SIN | May 16, 02:45 UTC | May 16, 11:46 UTC | 9h 1m |
| 2026-05-15 | ALK266 | RUH → CMB | May 15, 05:30 UTC | May 16, 00:20 UTC | 18h 49m |
| 2026-05-14 | ALK26L | DXB → CMB | May 14, 22:35 UTC | May 15, 20:35 UTC | 21h 59m |
| 2026-05-14 | ALK26L | DXB → CMB | May 14, 13:30 UTC | May 15, 05:40 UTC | 16h 10m |
| 2026-05-14 | ALK405 | BKK → CMB | May 14, 07:25 UTC | May 14, 07:55 UTC | 30m |
| 2026-05-14 | ALK404 | CMB → BKK | May 14, 05:05 UTC | May 14, 05:35 UTC | 30m |
| 2026-05-13 | ALK122 | MAA → CMB | May 13, 06:15 UTC | May 13, 06:25 UTC | 10m |
| 2026-05-13 | ALK121 | CMB → MAA | May 13, 02:40 UTC | May 13, 02:50 UTC | 10m |
| 2026-05-11 | ALK115 | CMB → MLE | May 11, 04:30 UTC | May 11, 16:40 UTC | 12h 10m |
| 2026-05-10 | ALK309 | SIN → CMB | May 10, 12:40 UTC | May 11, 02:40 UTC | 14h 0m |
| 2026-05-10 | ALK308 | CMB → SIN | May 10, 09:50 UTC | May 10, 10:15 UTC | 25m |
| 2026-05-09 | ALK308 | CMB → SIN | May 9, 13:05 UTC | May 10, 10:15 UTC | 21h 10m |
| 2026-05-09 | ALK308 | CMB → SIN | May 9, 12:50 UTC | May 10, 10:15 UTC | 21h 25m |
| 2026-05-09 | ALK308 | CMB → SIN | May 9, 09:50 UTC | May 9, 10:25 UTC | 35m |
| 2026-05-08 | ALK25L | CMB → DXB | May 8, 03:14 UTC | May 8, 14:15 UTC | 11h 0m |
| 2026-05-07 | ALK25L | CMB → DXB | May 7, 16:50 UTC | May 8, 14:15 UTC | 21h 25m |
| 2026-05-07 | ALK103 | CMB → MLE | May 7, 14:05 UTC | May 8, 03:14 UTC | 13h 10m |
| 2026-05-07 | ALK405 | BKK → CMB | May 7, 07:25 UTC | May 8, 03:14 UTC | 19h 50m |
| 2026-05-07 | ALK404 | CMB → BKK | May 7, 05:00 UTC | May 7, 05:25 UTC | 25m |
| 2026-05-06 | ALK90L | DAC → CMB | May 6, 08:50 UTC | May 6, 15:00 UTC | 6h 10m |
| 2026-05-06 | ALK89L | CMB → TRZ | May 6, 05:20 UTC | May 6, 06:45 UTC | 1h 25m |
| 2026-05-04 | ALK154 | LHE → CMB | May 4, 02:10 UTC | May 4, 04:39 UTC | 2h 30m |
| 2026-05-03 | ALK153 | CMB → LHE | May 3, 12:35 UTC | May 4, 00:05 UTC | 11h 30m |
| 2026-05-03 | ALK308 | CMB → SIN | May 3, 09:40 UTC | May 3, 10:30 UTC | 50m |
| 2026-05-02 | ALK308 | CMB → SIN | May 2, 13:05 UTC | May 3, 10:30 UTC | 21h 24m |
| 2026-05-02 | ALK308 | CMB → SIN | May 2, 12:40 UTC | May 3, 10:30 UTC | 21h 49m |
| 2026-05-02 | ALK308 | CMB → SIN | May 2, 09:40 UTC | May 2, 10:30 UTC | 50m |
| 2026-05-01 | ALK90L | DAC → CMB | May 1, 07:10 UTC | May 1, 08:40 UTC | 1h 30m |
| 2026-04-30 | ALK89L | CMB → TRZ | Apr 30, 12:40 UTC | May 1, 05:20 UTC | 16h 40m |
| 2026-04-30 | ALK308 | CMB → SIN | Apr 30, 09:55 UTC | Apr 30, 10:50 UTC | 55m |
| 2026-04-28 | ALK122 | MAA → CMB | Apr 28, 04:55 UTC | Apr 28, 05:20 UTC | 25m |
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 4R-ALT page for operator, model, and routing details .