sensors Mode-S transponder
770454
ICAO 24-bit transponder address · allocated to Sri Lanka
Currently assigned to 4R-ABT · AIRBUS A-320
- Hex
- 770454
- Octal
- 35602124
- Decimal
- 7,799,892
- Country
- LK
- Tail
- 4R-ABT
- Type
- A320
- Flights observed
- 102
- Distinct callsigns
- 20
- Country
- LK
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 770454 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 |
|---|---|---|---|
| ALK191 | SriLankan Airlines | 11 | 2026-05-29 |
| ALK144 | SriLankan Airlines | 9 | 2026-05-19 |
| ALK192 | SriLankan Airlines | 8 | 2026-05-30 |
| ALK364 | SriLankan Airlines | 6 | 2026-05-09 |
| ALK143 | SriLankan Airlines | 6 | 2026-05-19 |
| ALK402 | SriLankan Airlines | 5 | 2026-05-19 |
| ALK365 | SriLankan Airlines | 5 | 2026-05-09 |
| ALK309 | SriLankan Airlines | 5 | 2026-05-26 |
| ALK318 | SriLankan Airlines | 4 | 2026-05-12 |
| ALK308 | SriLankan Airlines | 4 | 2026-05-25 |
| ALK306 | SriLankan Airlines | 4 | 2026-05-25 |
| ALK184 | SriLankan Airlines | 4 | 2026-05-14 |
| ALK403 | SriLankan Airlines | 3 | 2026-05-20 |
| ALK307 | SriLankan Airlines | 3 | 2026-05-26 |
| ALK195 | SriLankan Airlines | 3 | 2026-05-04 |
| ALK319 | SriLankan Airlines | 2 | 2026-05-27 |
| ALK196 | SriLankan Airlines | 2 | 2026-05-04 |
| ALK186 | SriLankan Airlines | 2 | 2026-05-24 |
| ALK185 | SriLankan Airlines | 2 | 2026-05-24 |
| ALK404 | SriLankan Airlines | 1 | 2026-05-16 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | ALK192 | DEL → CMB | May 30, 00:15 UTC | May 30, 10:50 UTC | 10h 35m |
| 2026-05-29 | ALK191 | CMB → DEL | May 29, 20:00 UTC | May 29, 22:30 UTC | 2h 30m |
| 2026-05-28 | ALK166 | COK → CMB | May 28, 04:35 UTC | May 28, 05:05 UTC | 30m |
| 2026-05-28 | ALK165 | CMB → COK | May 28, 02:50 UTC | May 28, 03:25 UTC | 35m |
| 2026-05-27 | ALK319 | KUL → CMB | May 27, 00:59 UTC | May 27, 01:29 UTC | 30m |
| 2026-05-26 | ALK309 | SIN → CMB | May 26, 12:24 UTC | May 26, 22:59 UTC | 10h 35m |
| 2026-05-26 | ALK307 | SIN → CMB | May 26, 02:19 UTC | May 26, 10:25 UTC | 8h 5m |
| 2026-05-25 | ALK306 | CMB → SIN | May 25, 12:45 UTC | May 26, 00:09 UTC | 11h 24m |
| 2026-05-25 | ALK308 | CMB → SIN | May 25, 10:05 UTC | May 25, 10:55 UTC | 50m |
| 2026-05-24 | ALK186 | LHE → CMB | May 24, 13:45 UTC | May 24, 16:25 UTC | 2h 40m |
| 2026-05-24 | ALK185 | CMB → LHE | May 24, 02:15 UTC | May 24, 11:50 UTC | 9h 35m |
| 2026-05-23 | ALK306 | CMB → SIN | May 23, 23:25 UTC | May 24, 00:15 UTC | 50m |
| 2026-05-22 | ALK192 | DEL → CMB | May 22, 00:05 UTC | May 22, 02:25 UTC | 2h 20m |
| 2026-05-21 | ALK191 | CMB → DEL | May 21, 20:05 UTC | May 21, 22:35 UTC | 2h 30m |
| 2026-05-21 | ALK191 | CMB → DEL | May 21, 02:05 UTC | May 21, 22:35 UTC | 20h 30m |
| 2026-05-21 | ALK192 | DEL → CMB | May 21, 00:05 UTC | May 21, 22:35 UTC | 22h 30m |
| 2026-05-20 | ALK191 | CMB → DEL | May 20, 19:40 UTC | May 20, 22:10 UTC | 2h 30m |
| 2026-05-20 | ALK403 | BKK → CMB | May 20, 01:00 UTC | May 20, 01:20 UTC | 20m |
| 2026-05-19 | ALK402 | CMB → BKK | May 19, 22:45 UTC | May 19, 23:05 UTC | 20m |
| 2026-05-19 | ALK144 | BOM → CMB | May 19, 16:35 UTC | May 19, 17:30 UTC | 55m |
| 2026-05-19 | ALK144 | BOM → CMB | May 19, 15:50 UTC | May 19, 16:00 UTC | 10m |
| 2026-05-19 | ALK143 | CMB → BOM | May 19, 13:40 UTC | May 19, 14:15 UTC | 35m |
| 2026-05-19 | ALK143 | CMB → BOM | May 19, 07:20 UTC | May 19, 13:05 UTC | 5h 45m |
| 2026-05-18 | ALK309 | SIN → CMB | May 18, 12:50 UTC | May 19, 05:35 UTC | 16h 44m |
| 2026-05-18 | ALK308 | CMB → SIN | May 18, 10:10 UTC | May 18, 11:00 UTC | 50m |
| 2026-05-17 | ALK192 | DEL → CMB | May 17, 00:00 UTC | May 17, 09:25 UTC | 9h 25m |
| 2026-05-16 | ALK191 | CMB → DEL | May 16, 07:16 UTC | May 16, 22:25 UTC | 15h 9m |
| 2026-05-16 | ALK404 | CMB → BKK | May 16, 05:05 UTC | May 16, 05:25 UTC | 20m |
| 2026-05-15 | ALK174 | BLR → CMB | May 15, 22:05 UTC | May 15, 22:30 UTC | 25m |
| 2026-05-15 | ALK173 | CMB → BLR | May 15, 20:05 UTC | May 15, 20:35 UTC | 30m |
| 2026-05-15 | ALK144 | BOM → CMB | May 15, 12:20 UTC | May 15, 17:05 UTC | 4h 44m |
| 2026-05-14 | ALK184 | KHI → CMB | May 14, 15:05 UTC | May 15, 13:05 UTC | 22h 0m |
| 2026-05-14 | ALK184 | KHI → CMB | May 14, 13:25 UTC | May 15, 13:00 UTC | 23h 35m |
| 2026-05-13 | ALK192 | DEL → CMB | May 13, 23:50 UTC | May 14, 11:20 UTC | 11h 30m |
| 2026-05-13 | ALK191 | CMB → DEL | May 13, 12:25 UTC | May 13, 22:40 UTC | 10h 15m |
| 2026-05-13 | ALK191 | CMB → DEL | May 13, 01:05 UTC | May 13, 22:40 UTC | 21h 35m |
| 2026-05-13 | ALK191 | CMB → DEL | May 13, 00:55 UTC | May 13, 22:40 UTC | 21h 45m |
| 2026-05-12 | ALK318 | CMB → KUL | May 12, 22:25 UTC | May 12, 22:50 UTC | 25m |
| 2026-05-11 | ALK309 | SIN → CMB | May 11, 13:05 UTC | May 12, 07:25 UTC | 18h 21m |
| 2026-05-11 | ALK309 | SIN → CMB | May 11, 12:50 UTC | May 12, 07:25 UTC | 18h 35m |
| 2026-05-11 | ALK308 | CMB → SIN | May 11, 00:49 UTC | May 11, 10:25 UTC | 9h 35m |
| 2026-05-10 | ALK172 | BLR → CMB | May 10, 16:10 UTC | May 10, 23:00 UTC | 6h 50m |
| 2026-05-10 | ALK171 | CMB → BLR | May 10, 00:55 UTC | May 10, 14:40 UTC | 13h 45m |
| 2026-05-09 | ALK318 | CMB → KUL | May 9, 22:45 UTC | May 9, 23:09 UTC | 25m |
| 2026-05-09 | ALK365 | CGK → CMB | May 9, 07:55 UTC | May 9, 08:10 UTC | 15m |
| 2026-05-09 | ALK364 | CMB → CGK | May 9, 06:15 UTC | May 9, 06:30 UTC | 15m |
| 2026-05-09 | ALK364 | CMB → CGK | May 9, 05:20 UTC | May 9, 05:40 UTC | 20m |
| 2026-05-07 | ALK403 | BKK → CMB | May 7, 00:55 UTC | May 7, 01:15 UTC | 20m |
| 2026-05-05 | ALK184 | KHI → CMB | May 5, 14:50 UTC | May 6, 06:10 UTC | 15h 20m |
| 2026-05-05 | ALK184 | KHI → CMB | May 5, 09:05 UTC | May 6, 06:10 UTC | 21h 5m |
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-ABT page for operator, model, and routing details .