sensors Mode-S transponder
77044C
ICAO 24-bit transponder address · allocated to Sri Lanka
Currently assigned to 4R-ABL · AIRBUS A-320
- Hex
- 77044C
- Octal
- 35602114
- Decimal
- 7,799,884
- Country
- LK
- Tail
- 4R-ABL
- Type
- A320
- Flights observed
- 94
- Distinct callsigns
- 20
- Country
- LK
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 77044C 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 |
|---|---|---|---|
| ALK144 | SriLankan Airlines | 8 | 2026-05-16 |
| ALK306 | SriLankan Airlines | 6 | 2026-05-15 |
| ALK195 | SriLankan Airlines | 6 | 2026-05-27 |
| ALK186 | SriLankan Airlines | 6 | 2026-05-17 |
| ALK185 | SriLankan Airlines | 5 | 2026-05-17 |
| ALK196 | SriLankan Airlines | 4 | 2026-05-27 |
| ALK403 | SriLankan Airlines | 3 | 2026-05-06 |
| ALK402 | SriLankan Airlines | 3 | 2026-05-05 |
| ALK307 | SriLankan Airlines | 3 | 2026-05-16 |
| ALK184 | SriLankan Airlines | 3 | 2026-05-19 |
| ALK152 | SriLankan Airlines | 3 | 2026-05-11 |
| ALK143 | SriLankan Airlines | 3 | 2026-05-16 |
| ALK1174 | SriLankan Airlines | 3 | 2026-05-21 |
| ALK405 | SriLankan Airlines | 2 | 2026-05-02 |
| ALK404 | SriLankan Airlines | 2 | 2026-05-05 |
| ALK308 | SriLankan Airlines | 2 | 2026-05-11 |
| ALK192 | SriLankan Airlines | 2 | 2026-05-26 |
| ALK191 | SriLankan Airlines | 2 | 2026-05-25 |
| ALK171 | SriLankan Airlines | 2 | 2026-05-01 |
| ALK168 | SriLankan Airlines | 2 | 2026-05-22 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-27 | ALK196 | DEL → CMB | May 27, 17:20 UTC | May 27, 19:30 UTC | 2h 10m |
| 2026-05-27 | ALK195 | CMB → DEL | May 27, 00:49 UTC | May 27, 12:05 UTC | 11h 16m |
| 2026-05-26 | ALK192 | DEL → CMB | May 26, 00:04 UTC | May 26, 22:54 UTC | 22h 50m |
| 2026-05-25 | ALK191 | CMB → DEL | May 25, 19:59 UTC | May 25, 22:34 UTC | 2h 35m |
| 2026-05-23 | ALK103 | CMB → MLE | May 23, 13:55 UTC | May 23, 16:50 UTC | 2h 55m |
| 2026-05-23 | ALK166 | COK → CMB | May 23, 04:40 UTC | May 23, 05:10 UTC | 30m |
| 2026-05-23 | ALK165 | CMB → COK | May 23, 03:00 UTC | May 23, 03:40 UTC | 40m |
| 2026-05-22 | ALK168 | COK → CMB | May 22, 10:45 UTC | May 22, 11:20 UTC | 34m |
| 2026-05-22 | ALK167 | CMB → COK | May 22, 09:05 UTC | May 22, 09:25 UTC | 20m |
| 2026-05-22 | ALK162 | TRV → CMB | May 22, 05:55 UTC | May 22, 06:15 UTC | 20m |
| 2026-05-22 | ALK161 | CMB → TRV | May 22, 04:15 UTC | May 22, 04:40 UTC | 25m |
| 2026-05-21 | ALK1174 | BLR → CMB | May 21, 04:45 UTC | May 21, 05:15 UTC | 30m |
| 2026-05-20 | ALK196 | DEL → CMB | May 20, 13:25 UTC | May 21, 03:30 UTC | 14h 5m |
| 2026-05-20 | ALK195 | CMB → DEL | May 20, 09:30 UTC | May 20, 11:55 UTC | 2h 25m |
| 2026-05-19 | ALK184 | KHI → CMB | May 19, 15:10 UTC | May 20, 11:55 UTC | 20h 46m |
| 2026-05-19 | ALK184 | KHI → CMB | May 19, 13:35 UTC | May 20, 11:55 UTC | 22h 21m |
| 2026-05-19 | ALK183 | CMB → KHI | May 19, 09:15 UTC | May 19, 11:25 UTC | 2h 10m |
| 2026-05-17 | ALK186 | LHE → CMB | May 17, 13:20 UTC | May 17, 16:05 UTC | 2h 45m |
| 2026-05-17 | ALK185 | CMB → LHE | May 17, 00:55 UTC | May 17, 11:40 UTC | 10h 45m |
| 2026-05-16 | ALK144 | BOM → CMB | May 16, 16:25 UTC | May 16, 23:10 UTC | 6h 45m |
| 2026-05-16 | ALK144 | BOM → CMB | May 16, 15:40 UTC | May 16, 15:50 UTC | 10m |
| 2026-05-16 | ALK143 | CMB → BOM | May 16, 13:51 UTC | May 16, 14:16 UTC | 25m |
| 2026-05-16 | ALK307 | SIN → CMB | May 16, 02:20 UTC | May 16, 13:15 UTC | 10h 56m |
| 2026-05-15 | ALK306 | CMB → SIN | May 15, 23:35 UTC | May 16, 00:30 UTC | 55m |
| 2026-05-15 | ALK168 | COK → CMB | May 15, 10:55 UTC | May 15, 11:30 UTC | 35m |
| 2026-05-15 | ALK167 | CMB → COK | May 15, 09:05 UTC | May 15, 09:25 UTC | 20m |
| 2026-05-15 | ALK1174 | BLR → CMB | May 15, 04:50 UTC | May 15, 05:20 UTC | 30m |
| 2026-05-15 | ALK1173 | CMB → BLR | May 15, 02:55 UTC | May 15, 03:30 UTC | 35m |
| 2026-05-14 | ALK307 | SIN → CMB | May 14, 02:15 UTC | May 14, 03:00 UTC | 45m |
| 2026-05-13 | ALK306 | CMB → SIN | May 13, 08:40 UTC | May 14, 00:10 UTC | 15h 30m |
| 2026-05-13 | ALK306 | CMB → SIN | May 13, 02:30 UTC | May 14, 00:10 UTC | 21h 40m |
| 2026-05-12 | ALK306 | CMB → SIN | May 12, 12:40 UTC | May 13, 00:00 UTC | 11h 20m |
| 2026-05-11 | ALK308 | CMB → SIN | May 11, 22:15 UTC | May 12, 10:20 UTC | 12h 5m |
| 2026-05-11 | ALK128 | MAA → CMB | May 11, 10:50 UTC | May 11, 22:35 UTC | 11h 45m |
| 2026-05-11 | ALK127 | CMB → MAA | May 11, 08:55 UTC | May 11, 09:15 UTC | 20m |
| 2026-05-11 | ALK152 | KHI → CMB | May 11, 02:20 UTC | May 11, 04:55 UTC | 2h 35m |
| 2026-05-10 | ALK186 | LHE → CMB | May 10, 14:00 UTC | May 11, 00:19 UTC | 10h 20m |
| 2026-05-10 | ALK185 | CMB → LHE | May 10, 09:00 UTC | May 10, 11:55 UTC | 2h 55m |
| 2026-05-09 | ALK1174 | BLR → CMB | May 9, 05:00 UTC | May 9, 05:35 UTC | 35m |
| 2026-05-08 | ALK144 | BOM → CMB | May 8, 16:35 UTC | May 9, 03:25 UTC | 10h 50m |
| 2026-05-08 | ALK192 | DEL → CMB | May 8, 00:14 UTC | May 8, 13:25 UTC | 13h 10m |
| 2026-05-07 | ALK191 | CMB → DEL | May 7, 13:40 UTC | May 7, 23:09 UTC | 9h 29m |
| 2026-05-07 | ALK195 | CMB → DEL | May 7, 09:45 UTC | May 7, 12:15 UTC | 2h 30m |
| 2026-05-07 | ALK161 | CMB → TRV | May 7, 03:10 UTC | May 7, 03:35 UTC | 25m |
| 2026-05-06 | ALK144 | BOM → CMB | May 6, 12:30 UTC | May 6, 17:20 UTC | 4h 50m |
| 2026-05-06 | ALK403 | BKK → CMB | May 6, 00:46 UTC | May 6, 01:05 UTC | 20m |
| 2026-05-05 | ALK402 | CMB → BKK | May 5, 22:15 UTC | May 5, 23:00 UTC | 45m |
| 2026-05-05 | ALK144 | BOM → CMB | May 5, 07:00 UTC | May 5, 17:20 UTC | 10h 20m |
| 2026-05-05 | ALK404 | CMB → BKK | May 5, 05:00 UTC | May 5, 05:25 UTC | 25m |
| 2026-05-04 | ALK144 | BOM → CMB | May 4, 16:15 UTC | May 4, 17:55 UTC | 1h 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-ABL page for operator, model, and routing details .