sensors Mode-S transponder
77058F
ICAO 24-bit transponder address · allocated to Sri Lanka
Currently assigned to 4R-ALO · AIRBUS A-330-300
- Hex
- 77058F
- Octal
- 35602617
- Decimal
- 7,800,207
- Country
- LK
- Tail
- 4R-ALO
- Type
- A333
- Flights observed
- 114
- Distinct callsigns
- 20
- Country
- LK
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 77058F 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 |
|---|---|---|---|
| ALK504 | SriLankan Airlines | 23 | 2026-05-28 |
| ALK501 | SriLankan Airlines | 22 | 2026-05-27 |
| ALK503 | SriLankan Airlines | 19 | 2026-05-28 |
| ALK266 | SriLankan Airlines | 9 | 2026-05-16 |
| ALK265 | SriLankan Airlines | 7 | 2026-05-07 |
| ALK604 | SriLankan Airlines | 5 | 2026-05-29 |
| ALK600 | SriLankan Airlines | 4 | 2026-05-23 |
| ALK606 | SriLankan Airlines | 3 | 2026-05-10 |
| ALK26L | SriLankan Airlines | 3 | 2026-05-05 |
| ALK90L | - | 2 | 2026-04-14 |
| ALK89L | SriLankan Airlines | 2 | 2026-04-20 |
| ALK884 | - | 2 | 2026-04-20 |
| ALK607 | SriLankan Airlines | 2 | 2026-05-10 |
| ALK25L | SriLankan Airlines | 2 | 2026-04-25 |
| ALK102 | SriLankan Airlines | 2 | 2026-04-29 |
| ALK101 | SriLankan Airlines | 2 | 2026-05-06 |
| ALK605 | SriLankan Airlines | 1 | 2026-05-26 |
| ALK455 | SriLankan Airlines | 1 | 2026-04-25 |
| ALK454 | SriLankan Airlines | 1 | 2026-04-24 |
| ALK121 | SriLankan Airlines | 1 | 2026-04-26 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | ALK604 | CMB → MEL | May 29, 06:25 UTC | May 30, 04:05 UTC | 21h 40m |
| 2026-05-29 | ALK604 | CMB → MEL | May 29, 04:30 UTC | May 30, 03:45 UTC | 23h 15m |
| 2026-05-28 | ALK504 | LHR → CMB | May 28, 21:00 UTC | May 29, 06:35 UTC | 9h 35m |
| 2026-05-28 | ALK503 | CMB → LHR | May 28, 07:50 UTC | May 28, 19:05 UTC | 11h 15m |
| 2026-05-27 | ALK501 | CMB → LHR | May 27, 14:35 UTC | May 27, 23:05 UTC | 8h 30m |
| 2026-05-27 | ALK501 | CMB → LHR | May 27, 11:40 UTC | May 27, 12:20 UTC | 40m |
| 2026-05-26 | ALK501 | CMB → LHR | May 26, 23:10 UTC | May 27, 09:45 UTC | 10h 36m |
| 2026-05-26 | ALK605 | MEL → CMB | May 26, 06:29 UTC | May 26, 07:40 UTC | 1h 10m |
| 2026-05-25 | ALK604 | CMB → MEL | May 25, 14:00 UTC | May 26, 04:39 UTC | 14h 40m |
| 2026-05-25 | ALK604 | CMB → MEL | May 25, 07:50 UTC | May 26, 04:39 UTC | 20h 49m |
| 2026-05-24 | ALK501 | CMB → LHR | May 24, 14:05 UTC | May 25, 05:15 UTC | 15h 10m |
| 2026-05-24 | ALK501 | CMB → LHR | May 24, 11:10 UTC | May 24, 11:55 UTC | 45m |
| 2026-05-23 | ALK501 | CMB → LHR | May 23, 22:35 UTC | May 24, 09:10 UTC | 10h 35m |
| 2026-05-23 | ALK600 | CMB → MEL | May 23, 09:45 UTC | May 23, 11:50 UTC | 2h 5m |
| 2026-05-23 | ALK600 | CMB → MEL | May 23, 06:55 UTC | May 23, 08:00 UTC | 1h 5m |
| 2026-05-23 | ALK600 | CMB → MEL | May 23, 04:00 UTC | May 23, 05:00 UTC | 1h 0m |
| 2026-05-22 | ALK600 | CMB → MEL | May 22, 06:30 UTC | May 23, 05:00 UTC | 22h 29m |
| 2026-05-21 | ALK504 | LHR → CMB | May 21, 20:55 UTC | May 22, 06:35 UTC | 9h 40m |
| 2026-05-21 | ALK503 | CMB → LHR | May 21, 02:25 UTC | May 21, 18:55 UTC | 16h 30m |
| 2026-05-20 | ALK501 | CMB → LHR | May 20, 13:55 UTC | May 20, 23:20 UTC | 9h 25m |
| 2026-05-20 | ALK501 | CMB → LHR | May 20, 11:05 UTC | May 20, 12:00 UTC | 55m |
| 2026-05-19 | ALK501 | CMB → LHR | May 19, 22:35 UTC | May 20, 08:45 UTC | 10h 11m |
| 2026-05-19 | ALK501 | CMB → LHR | May 19, 07:50 UTC | May 20, 07:45 UTC | 23h 56m |
| 2026-05-19 | ALK501 | CMB → LHR | May 19, 06:35 UTC | May 20, 05:20 UTC | 22h 46m |
| 2026-05-18 | ALK604 | CMB → MEL | May 18, 14:05 UTC | May 19, 04:50 UTC | 14h 44m |
| 2026-05-17 | ALK504 | LHR → CMB | May 17, 21:10 UTC | May 18, 07:30 UTC | 10h 20m |
| 2026-05-17 | ALK503 | CMB → LHR | May 17, 08:15 UTC | May 17, 19:01 UTC | 10h 45m |
| 2026-05-16 | ALK266 | RUH → CMB | May 16, 14:01 UTC | May 17, 01:30 UTC | 11h 29m |
| 2026-05-10 | ALK607 | SYD → CMB | May 10, 07:40 UTC | May 10, 09:24 UTC | 1h 45m |
| 2026-05-10 | ALK606 | CMB → SYD | May 10, 05:04 UTC | May 10, 05:50 UTC | 45m |
| 2026-05-09 | ALK606 | CMB → SYD | May 9, 06:20 UTC | May 10, 05:45 UTC | 23h 25m |
| 2026-05-08 | ALK504 | LHR → CMB | May 8, 21:00 UTC | May 9, 06:30 UTC | 9h 30m |
| 2026-05-08 | ALK503 | CMB → LHR | May 8, 07:59 UTC | May 8, 19:10 UTC | 11h 10m |
| 2026-05-07 | ALK265 | CMB → RUH | May 7, 13:55 UTC | May 7, 21:30 UTC | 7h 35m |
| 2026-05-06 | ALK504 | LHR → CMB | May 6, 21:20 UTC | May 7, 06:45 UTC | 9h 25m |
| 2026-05-06 | ALK503 | CMB → LHR | May 6, 08:01 UTC | May 6, 19:10 UTC | 11h 9m |
| 2026-05-06 | ALK101 | CMB → MLE | May 6, 02:35 UTC | May 6, 05:30 UTC | 2h 55m |
| 2026-05-05 | ALK26L | DXB → CMB | May 5, 04:55 UTC | May 5, 23:05 UTC | 18h 10m |
| 2026-05-05 | ALK26L | DXB → CMB | May 5, 01:50 UTC | May 5, 23:05 UTC | 21h 15m |
| 2026-05-04 | ALK504 | LHR → CMB | May 4, 23:50 UTC | May 5, 23:05 UTC | 23h 15m |
| 2026-05-04 | ALK504 | LHR → CMB | May 4, 21:10 UTC | May 5, 14:10 UTC | 17h 0m |
| 2026-05-04 | ALK503 | CMB → LHR | May 4, 02:25 UTC | May 4, 19:05 UTC | 16h 41m |
| 2026-05-03 | ALK501 | CMB → LHR | May 3, 14:25 UTC | May 3, 23:50 UTC | 9h 25m |
| 2026-05-03 | ALK501 | CMB → LHR | May 3, 11:25 UTC | May 3, 12:20 UTC | 55m |
| 2026-05-02 | ALK501 | CMB → LHR | May 2, 22:35 UTC | May 3, 09:30 UTC | 10h 54m |
| 2026-05-02 | ALK115 | CMB → MLE | May 2, 08:35 UTC | May 2, 11:50 UTC | 3h 15m |
| 2026-05-01 | ALK501 | CMB → LHR | May 1, 14:15 UTC | May 1, 23:30 UTC | 9h 15m |
| 2026-05-01 | ALK501 | CMB → LHR | May 1, 11:25 UTC | May 1, 12:10 UTC | 45m |
| 2026-04-30 | ALK501 | CMB → LHR | Apr 30, 22:25 UTC | May 1, 09:30 UTC | 11h 5m |
| 2026-04-29 | ALK504 | LHR → CMB | Apr 29, 22:00 UTC | Apr 30, 17:00 UTC | 19h 0m |
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-ALO page for operator, model, and routing details .