sensors Mode-S transponder
77058D
ICAO 24-bit transponder address · allocated to Sri Lanka
Currently assigned to 4R-ALM · AIRBUS A-330-300
- Hex
- 77058D
- Octal
- 35602615
- Decimal
- 7,800,205
- Country
- LK
- Tail
- 4R-ALM
- Type
- A333
- Flights observed
- 124
- Distinct callsigns
- 20
- Country
- LK
- Last broadcast
- 10h ago
Last known position
Country allocation
The ICAO 24-bit address 77058D 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 |
|---|---|---|---|
| ALK604 | SriLankan Airlines | 24 | 2026-05-28 |
| ALK455 | SriLankan Airlines | 20 | 2026-05-26 |
| ALK454 | SriLankan Airlines | 18 | 2026-05-25 |
| ALK605 | SriLankan Airlines | 10 | 2026-05-28 |
| ALK89L | SriLankan Airlines | 7 | 2026-05-20 |
| ALK606 | SriLankan Airlines | 7 | 2026-05-15 |
| ALK90L | SriLankan Airlines | 4 | 2026-05-19 |
| ALK308 | SriLankan Airlines | 4 | 2026-05-29 |
| ALK142 | SriLankan Airlines | 4 | 2026-05-07 |
| ALK607 | SriLankan Airlines | 3 | 2026-05-15 |
| ALK600 | SriLankan Airlines | 3 | 2026-05-24 |
| ALK471 | SriLankan Airlines | 3 | 2026-05-18 |
| ALK266 | SriLankan Airlines | 3 | 2026-04-30 |
| ALK309 | SriLankan Airlines | 2 | 2026-05-29 |
| ALK26L | SriLankan Airlines | 2 | 2026-05-22 |
| ALK101 | SriLankan Airlines | 2 | 2026-04-24 |
| ALK558 | - | 1 | 2026-04-12 |
| ALK470 | SriLankan Airlines | 1 | 2026-05-03 |
| ALK315 | SriLankan Airlines | 1 | 2026-04-30 |
| ALK314 | SriLankan Airlines | 1 | 2026-04-30 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | ALK309 | SIN → CMB | May 29, 12:35 UTC | May 29, 13:15 UTC | 40m |
| 2026-05-29 | ALK308 | CMB → SIN | May 29, 02:25 UTC | May 29, 10:45 UTC | 8h 20m |
| 2026-05-28 | ALK605 | MEL → CMB | May 28, 09:20 UTC | May 29, 05:20 UTC | 20h 0m |
| 2026-05-28 | ALK605 | MEL → CMB | May 28, 08:30 UTC | May 29, 05:20 UTC | 20h 50m |
| 2026-05-28 | ALK604 | CMB → MEL | May 28, 03:15 UTC | May 28, 06:20 UTC | 3h 5m |
| 2026-05-27 | ALK604 | CMB → MEL | May 27, 07:20 UTC | May 28, 06:20 UTC | 23h 0m |
| 2026-05-27 | ALK605 | MEL → CMB | May 27, 06:49 UTC | May 28, 05:15 UTC | 22h 25m |
| 2026-05-27 | ALK604 | CMB → MEL | May 27, 01:24 UTC | May 27, 04:39 UTC | 3h 15m |
| 2026-05-26 | ALK604 | CMB → MEL | May 26, 08:19 UTC | May 27, 04:39 UTC | 20h 20m |
| 2026-05-26 | ALK455 | NRT → CMB | May 26, 05:25 UTC | May 27, 04:39 UTC | 23h 15m |
| 2026-05-26 | ALK455 | NRT → CMB | May 26, 03:00 UTC | May 26, 08:59 UTC | 6h 0m |
| 2026-05-25 | ALK454 | CMB → NRT | May 25, 05:10 UTC | May 25, 23:14 UTC | 18h 5m |
| 2026-05-25 | ALK454 | CMB → NRT | May 25, 02:30 UTC | May 25, 23:14 UTC | 20h 45m |
| 2026-05-24 | ALK600 | CMB → MEL | May 24, 11:20 UTC | May 25, 08:50 UTC | 21h 30m |
| 2026-05-24 | ALK600 | CMB → MEL | May 24, 09:55 UTC | May 25, 08:50 UTC | 22h 55m |
| 2026-05-24 | ALK600 | CMB → MEL | May 24, 06:55 UTC | May 24, 08:15 UTC | 1h 20m |
| 2026-05-23 | ALK604 | CMB → MEL | May 23, 12:40 UTC | May 24, 05:05 UTC | 16h 26m |
| 2026-05-23 | ALK308 | CMB → SIN | May 23, 09:50 UTC | May 23, 10:55 UTC | 1h 5m |
| 2026-05-22 | ALK26L | DXB → CMB | May 22, 05:20 UTC | May 22, 23:20 UTC | 18h 0m |
| 2026-05-22 | ALK26L | DXB → CMB | May 22, 02:40 UTC | May 22, 23:20 UTC | 20h 40m |
| 2026-05-21 | ALK455 | NRT → CMB | May 21, 08:35 UTC | May 22, 05:25 UTC | 20h 50m |
| 2026-05-21 | ALK455 | NRT → CMB | May 21, 06:10 UTC | May 22, 02:45 UTC | 20h 35m |
| 2026-05-21 | ALK455 | NRT → CMB | May 21, 03:20 UTC | May 22, 02:45 UTC | 23h 25m |
| 2026-05-21 | ALK455 | NRT → CMB | May 21, 03:10 UTC | May 21, 09:15 UTC | 6h 5m |
| 2026-05-20 | ALK454 | CMB → NRT | May 20, 08:45 UTC | May 20, 22:55 UTC | 14h 10m |
| 2026-05-20 | ALK89L | CMB → TRZ | May 20, 06:45 UTC | May 20, 07:15 UTC | 30m |
| 2026-05-19 | ALK89L | CMB → TRZ | May 19, 07:20 UTC | May 20, 07:15 UTC | 23h 56m |
| 2026-05-19 | ALK90L | DAC → CMB | May 19, 07:05 UTC | May 19, 07:25 UTC | 20m |
| 2026-05-18 | ALK89L | CMB → TRZ | May 18, 21:45 UTC | May 19, 05:30 UTC | 7h 45m |
| 2026-05-18 | ALK471 | ICN → CMB | May 18, 03:10 UTC | May 18, 15:40 UTC | 12h 30m |
| 2026-05-17 | ALK455 | NRT → CMB | May 17, 03:20 UTC | May 17, 22:20 UTC | 19h 0m |
| 2026-05-17 | ALK455 | NRT → CMB | May 17, 03:05 UTC | May 17, 22:20 UTC | 19h 15m |
| 2026-05-16 | ALK454 | CMB → NRT | May 16, 08:55 UTC | May 16, 23:10 UTC | 14h 15m |
| 2026-05-15 | ALK607 | SYD → CMB | May 15, 06:50 UTC | May 15, 07:25 UTC | 35m |
| 2026-05-15 | ALK606 | CMB → SYD | May 15, 03:20 UTC | May 15, 04:55 UTC | 1h 35m |
| 2026-05-14 | ALK606 | CMB → SYD | May 14, 07:20 UTC | May 15, 04:55 UTC | 21h 35m |
| 2026-05-14 | ALK605 | MEL → CMB | May 14, 06:30 UTC | May 15, 04:55 UTC | 22h 25m |
| 2026-05-13 | ALK604 | CMB → MEL | May 13, 12:35 UTC | May 14, 04:30 UTC | 15h 55m |
| 2026-05-13 | ALK604 | CMB → MEL | May 13, 07:20 UTC | May 14, 04:30 UTC | 21h 10m |
| 2026-05-13 | ALK605 | MEL → CMB | May 13, 06:35 UTC | May 14, 04:30 UTC | 21h 55m |
| 2026-05-12 | ALK604 | CMB → MEL | May 12, 09:20 UTC | May 13, 04:35 UTC | 19h 15m |
| 2026-05-12 | ALK604 | CMB → MEL | May 12, 07:20 UTC | May 13, 04:35 UTC | 21h 15m |
| 2026-05-12 | ALK604 | CMB → MEL | May 12, 07:05 UTC | May 13, 04:35 UTC | 21h 30m |
| 2026-05-12 | ALK89L | CMB → TRZ | May 12, 03:05 UTC | May 12, 05:10 UTC | 2h 5m |
| 2026-05-11 | ALK89L | CMB → TRZ | May 11, 07:20 UTC | May 12, 05:10 UTC | 21h 50m |
| 2026-05-11 | ALK89L | CMB → TRZ | May 11, 06:40 UTC | May 12, 05:10 UTC | 22h 31m |
| 2026-05-11 | ALK604 | CMB → MEL | May 11, 02:00 UTC | May 11, 04:40 UTC | 2h 40m |
| 2026-05-10 | ALK604 | CMB → MEL | May 10, 08:25 UTC | May 11, 04:40 UTC | 20h 15m |
| 2026-05-10 | ALK455 | NRT → CMB | May 10, 05:20 UTC | May 11, 04:40 UTC | 23h 20m |
| 2026-05-10 | ALK455 | NRT → CMB | May 10, 03:20 UTC | May 11, 02:00 UTC | 22h 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 4R-ALM page for operator, model, and routing details .