sensors Mode-S transponder
77044F
ICAO 24-bit transponder address · allocated to Sri Lanka
Currently assigned to 4R-ABO · AIRBUS A-320
- Hex
- 77044F
- Octal
- 35602117
- Decimal
- 7,799,887
- Country
- LK
- Tail
- 4R-ABO
- Type
- A320
- Flights observed
- 69
- Distinct callsigns
- 20
- Country
- LK
- Last broadcast
- 52m ago
Last known position
Country allocation
The ICAO 24-bit address 77044F 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 | 10 | 2026-05-27 |
| ALK192 | SriLankan Airlines | 7 | 2026-05-28 |
| ALK195 | SriLankan Airlines | 4 | 2026-05-05 |
| ALK152 | SriLankan Airlines | 4 | 2026-05-30 |
| ALK90L | SriLankan Airlines | 3 | 2026-05-10 |
| ALK89L | SriLankan Airlines | 3 | 2026-05-10 |
| ALK196 | SriLankan Airlines | 3 | 2026-05-05 |
| ALK168 | SriLankan Airlines | 3 | 2026-05-13 |
| ALK405 | SriLankan Airlines | 2 | 2026-05-19 |
| ALK404 | SriLankan Airlines | 2 | 2026-05-19 |
| ALK403 | SriLankan Airlines | 2 | 2026-05-21 |
| ALK402 | SriLankan Airlines | 2 | 2026-05-20 |
| ALK307 | SriLankan Airlines | 2 | 2026-05-15 |
| ALK172 | SriLankan Airlines | 2 | 2026-05-15 |
| ALK167 | SriLankan Airlines | 2 | 2026-05-13 |
| ALK1174 | SriLankan Airlines | 2 | 2026-05-16 |
| ALK365 | SriLankan Airlines | 1 | 2026-04-16 |
| ALK364 | SriLankan Airlines | 1 | 2026-04-16 |
| ALK306 | - | 1 | 2026-04-13 |
| ALK171 | SriLankan Airlines | 1 | 2026-04-13 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | ALK152 | KHI → CMB | May 30, 02:30 UTC | May 30, 05:00 UTC | 2h 30m |
| 2026-05-29 | ALK151 | CMB → KHI | May 29, 22:10 UTC | May 30, 00:35 UTC | 2h 25m |
| 2026-05-28 | ALK192 | DEL → CMB | May 28, 00:20 UTC | May 28, 02:25 UTC | 2h 5m |
| 2026-05-27 | ALK191 | CMB → DEL | May 27, 20:10 UTC | May 27, 22:50 UTC | 2h 40m |
| 2026-05-25 | ALK162 | TRV → CMB | May 25, 04:35 UTC | May 25, 04:55 UTC | 20m |
| 2026-05-25 | ALK161 | CMB → TRV | May 25, 03:05 UTC | May 25, 03:30 UTC | 25m |
| 2026-05-21 | ALK403 | BKK → CMB | May 21, 00:50 UTC | May 21, 01:20 UTC | 30m |
| 2026-05-20 | ALK402 | CMB → BKK | May 20, 22:25 UTC | May 20, 23:05 UTC | 40m |
| 2026-05-19 | ALK405 | BKK → CMB | May 19, 07:05 UTC | May 19, 07:35 UTC | 30m |
| 2026-05-19 | ALK404 | CMB → BKK | May 19, 04:55 UTC | May 19, 05:25 UTC | 30m |
| 2026-05-16 | ALK1174 | BLR → CMB | May 16, 04:40 UTC | May 16, 05:00 UTC | 20m |
| 2026-05-15 | ALK172 | BLR → CMB | May 15, 16:05 UTC | May 16, 03:20 UTC | 11h 15m |
| 2026-05-15 | ALK307 | SIN → CMB | May 15, 02:25 UTC | May 15, 14:30 UTC | 12h 5m |
| 2026-05-14 | ALK144 | BOM → CMB | May 14, 12:30 UTC | May 15, 00:15 UTC | 11h 45m |
| 2026-05-14 | ALK166 | COK → CMB | May 14, 05:20 UTC | May 14, 05:50 UTC | 30m |
| 2026-05-14 | ALK165 | CMB → COK | May 14, 03:40 UTC | May 14, 04:00 UTC | 20m |
| 2026-05-13 | ALK168 | COK → CMB | May 13, 10:40 UTC | May 13, 11:15 UTC | 35m |
| 2026-05-13 | ALK167 | CMB → COK | May 13, 08:50 UTC | May 13, 09:20 UTC | 30m |
| 2026-05-11 | ALK405 | BKK → CMB | May 11, 07:05 UTC | May 11, 07:30 UTC | 25m |
| 2026-05-11 | ALK404 | CMB → BKK | May 11, 05:00 UTC | May 11, 05:25 UTC | 25m |
| 2026-05-10 | ALK90L | DAC → CMB | May 10, 07:50 UTC | May 11, 05:25 UTC | 21h 35m |
| 2026-05-10 | ALK90L | DAC → CMB | May 10, 07:10 UTC | May 11, 05:25 UTC | 22h 15m |
| 2026-05-10 | ALK89L | CMB → TRZ | May 10, 03:04 UTC | May 10, 05:10 UTC | 2h 5m |
| 2026-05-05 | ALK196 | DEL → CMB | May 5, 14:05 UTC | May 5, 16:40 UTC | 2h 35m |
| 2026-05-05 | ALK195 | CMB → DEL | May 5, 09:55 UTC | May 5, 12:35 UTC | 2h 40m |
| 2026-05-04 | ALK307 | SIN → CMB | May 4, 02:10 UTC | May 4, 02:45 UTC | 35m |
| 2026-05-03 | ALK90L | DAC → CMB | May 3, 07:45 UTC | May 4, 00:10 UTC | 16h 25m |
| 2026-05-03 | ALK89L | CMB → TRZ | May 3, 04:10 UTC | May 3, 05:30 UTC | 1h 20m |
| 2026-05-02 | ALK89L | CMB → TRZ | May 2, 06:40 UTC | May 3, 05:30 UTC | 22h 49m |
| 2026-05-02 | ALK192 | DEL → CMB | May 2, 00:10 UTC | May 2, 05:15 UTC | 5h 5m |
| 2026-05-01 | ALK191 | CMB → DEL | May 1, 20:00 UTC | May 1, 22:30 UTC | 2h 30m |
| 2026-05-01 | ALK191 | CMB → DEL | May 1, 02:05 UTC | May 1, 22:30 UTC | 20h 25m |
| 2026-05-01 | ALK192 | DEL → CMB | May 1, 00:10 UTC | May 1, 22:30 UTC | 22h 20m |
| 2026-04-30 | ALK191 | CMB → DEL | Apr 30, 13:45 UTC | Apr 30, 22:45 UTC | 9h 0m |
| 2026-04-30 | ALK195 | CMB → DEL | Apr 30, 00:05 UTC | Apr 30, 12:10 UTC | 12h 5m |
| 2026-04-29 | ALK191 | CMB → DEL | Apr 29, 13:35 UTC | Apr 29, 22:40 UTC | 9h 5m |
| 2026-04-29 | ALK195 | CMB → DEL | Apr 29, 11:45 UTC | Apr 29, 12:15 UTC | 30m |
| 2026-04-28 | ALK196 | DEL → CMB | Apr 28, 13:50 UTC | Apr 29, 09:45 UTC | 19h 55m |
| 2026-04-28 | ALK196 | DEL → CMB | Apr 28, 13:40 UTC | Apr 29, 09:45 UTC | 20h 5m |
| 2026-04-28 | ALK195 | CMB → DEL | Apr 28, 09:10 UTC | Apr 28, 12:00 UTC | 2h 50m |
| 2026-04-25 | ALK103 | CMB → MLE | Apr 25, 13:55 UTC | Apr 25, 16:50 UTC | 2h 55m |
| 2026-04-24 | ALK152 | KHI → CMB | Apr 24, 22:10 UTC | Apr 25, 04:55 UTC | 6h 45m |
| 2026-04-22 | ALK192 | DEL → CMB | Apr 22, 23:50 UTC | Apr 23, 02:30 UTC | 2h 40m |
| 2026-04-22 | ALK191 | CMB → DEL | Apr 22, 19:50 UTC | Apr 22, 22:15 UTC | 2h 25m |
| 2026-04-22 | ALK191 | CMB → DEL | Apr 22, 02:05 UTC | Apr 22, 22:15 UTC | 20h 10m |
| 2026-04-22 | ALK192 | DEL → CMB | Apr 22, 00:00 UTC | Apr 22, 22:15 UTC | 22h 15m |
| 2026-04-21 | ALK191 | CMB → DEL | Apr 21, 19:45 UTC | Apr 21, 22:20 UTC | 2h 35m |
| 2026-04-19 | ALK152 | KHI → CMB | Apr 19, 22:05 UTC | Apr 20, 05:05 UTC | 7h 0m |
| 2026-04-19 | ALK152 | KHI → CMB | Apr 19, 07:00 UTC | Apr 20, 05:05 UTC | 22h 5m |
| 2026-04-17 | ALK402 | CMB → BKK | Apr 17, 22:30 UTC | Apr 17, 23:00 UTC | 30m |
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-ABO page for operator, model, and routing details .