sensors Mode-S transponder
7705C5
ICAO 24-bit transponder address · allocated to Sri Lanka
Currently assigned to 4R-ANE · AIRBUS A-321neo
- Hex
- 7705C5
- Octal
- 35602705
- Decimal
- 7,800,261
- Country
- LK
- Tail
- 4R-ANE
- Type
- A21N
- Flights observed
- 42
- Distinct callsigns
- 20
- Country
- LK
- Last broadcast
- 19d ago
Last known position
Country allocation
The ICAO 24-bit address 7705C5 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 |
|---|---|---|---|
| ALK218 | SriLankan Airlines | 5 | 2026-07-25 |
| ALK217 | SriLankan Airlines | 4 | 2026-07-15 |
| ALK141 | - | 4 | 2026-07-09 |
| ALK364 | SriLankan Airlines | 3 | 2026-07-23 |
| ALK405 | - | 2 | 2026-07-20 |
| ALK315 | - | 2 | 2026-07-16 |
| ALK254 | SriLankan Airlines | 2 | 2026-07-18 |
| ALK192 | SriLankan Airlines | 2 | 2026-07-24 |
| ALK191 | SriLankan Airlines | 2 | 2026-07-21 |
| ALK172 | SriLankan Airlines | 2 | 2026-07-26 |
| ALK171 | SriLankan Airlines | 2 | 2026-07-26 |
| ALK89L | - | 1 | 2026-07-03 |
| ALK404 | SriLankan Airlines | 1 | 2026-07-19 |
| ALK314 | - | 1 | 2026-07-09 |
| ALK230 | - | 1 | 2026-07-17 |
| ALK229 | - | 1 | 2026-07-16 |
| ALK166 | - | 1 | 2026-07-14 |
| ALK165 | - | 1 | 2026-07-07 |
| ALK142 | - | 1 | 2026-07-03 |
| ALK1173 | SriLankan Airlines | 1 | 2026-07-18 |
Recent flights last 42
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | ALK172 | BLR → CMB | Jul 26, 16:00 UTC | Jul 26, 16:20 UTC | 20m |
| 2026-07-26 | ALK171 | CMB → BLR | Jul 26, 14:10 UTC | Jul 26, 14:30 UTC | 20m |
| 2026-07-25 | ALK218 | DOH → CMB | Jul 25, 19:40 UTC | Jul 25, 23:50 UTC | 4h 10m |
| 2026-07-24 | ALK192 | DEL → CMB | Jul 24, 00:15 UTC | Jul 24, 02:30 UTC | 2h 15m |
| 2026-07-23 | ALK364 | CMB → CGK | Jul 23, 05:20 UTC | Jul 23, 06:45 UTC | 1h 25m |
| 2026-07-21 | ALK191 | CMB → DEL | Jul 21, 15:00 UTC | Jul 21, 22:45 UTC | 7h 45m |
| 2026-07-20 | ALK405 | - | Jul 20, 07:25 UTC | Jul 20, 08:50 UTC | 1h 25m |
| 2026-07-19 | ALK405 | - | Jul 19, 07:40 UTC | Jul 19, 09:05 UTC | 1h 25m |
| 2026-07-19 | ALK404 | CMB → BKK | Jul 19, 05:40 UTC | Jul 19, 06:20 UTC | 40m |
| 2026-07-18 | ALK254 | DMM → CMB | Jul 18, 19:45 UTC | Jul 19, 00:20 UTC | 4h 35m |
| 2026-07-18 | ALK1173 | CMB → BLR | Jul 18, 02:45 UTC | Jul 18, 03:20 UTC | 36m |
| 2026-07-17 | ALK230 | - | Jul 17, 19:09 UTC | Jul 17, 23:55 UTC | 4h 45m |
| 2026-07-16 | ALK229 | - | Jul 16, 22:25 UTC | Jul 17, 16:34 UTC | 18h 10m |
| 2026-07-16 | ALK254 | - | Jul 16, 19:40 UTC | Jul 17, 16:34 UTC | 20h 55m |
| 2026-07-16 | ALK315 | - | Jul 16, 07:20 UTC | Jul 16, 07:50 UTC | 30m |
| 2026-07-15 | ALK218 | - | Jul 15, 19:45 UTC | Jul 15, 23:55 UTC | 4h 10m |
| 2026-07-15 | ALK217 | CMB → DOH | Jul 15, 13:40 UTC | Jul 15, 17:40 UTC | 4h 0m |
| 2026-07-14 | ALK218 | - | Jul 14, 19:45 UTC | Jul 14, 23:50 UTC | 4h 4m |
| 2026-07-14 | ALK217 | CMB → DOH | Jul 14, 07:20 UTC | Jul 14, 17:40 UTC | 10h 20m |
| 2026-07-14 | ALK166 | - | Jul 14, 04:50 UTC | Jul 14, 05:20 UTC | 30m |
| 2026-07-12 | ALK192 | - | Jul 12, 23:55 UTC | Jul 13, 16:40 UTC | 16h 45m |
| 2026-07-12 | ALK171 | CMB → BLR | Jul 12, 14:20 UTC | Jul 12, 14:45 UTC | 25m |
| 2026-07-12 | ALK364 | - | Jul 12, 06:20 UTC | Jul 12, 06:40 UTC | 20m |
| 2026-07-12 | ALK364 | - | Jul 12, 05:10 UTC | Jul 12, 05:40 UTC | 30m |
| 2026-07-10 | ALK218 | - | Jul 10, 19:35 UTC | Jul 10, 20:00 UTC | 25m |
| 2026-07-10 | ALK217 | CMB → DOH | Jul 10, 13:35 UTC | Jul 10, 17:45 UTC | 4h 10m |
| 2026-07-09 | ALK141 | - | Jul 9, 20:10 UTC | Jul 9, 20:25 UTC | 15m |
| 2026-07-09 | ALK141 | - | Jul 9, 18:35 UTC | Jul 9, 19:30 UTC | 55m |
| 2026-07-09 | ALK314 | - | Jul 9, 05:20 UTC | Jul 9, 05:55 UTC | 35m |
| 2026-07-08 | ALK218 | - | Jul 8, 19:50 UTC | Jul 9, 00:10 UTC | 4h 20m |
| 2026-07-08 | ALK315 | - | Jul 8, 08:35 UTC | Jul 8, 09:00 UTC | 25m |
| 2026-07-07 | ALK141 | - | Jul 7, 20:05 UTC | Jul 7, 20:45 UTC | 40m |
| 2026-07-07 | ALK141 | - | Jul 7, 11:05 UTC | Jul 7, 19:30 UTC | 8h 25m |
| 2026-07-07 | ALK165 | - | Jul 7, 03:05 UTC | Jul 7, 03:50 UTC | 45m |
| 2026-07-05 | ALK172 | - | Jul 5, 16:10 UTC | Jul 5, 16:40 UTC | 30m |
| 2026-07-03 | ALK142 | - | Jul 3, 22:10 UTC | Jul 3, 23:55 UTC | 1h 45m |
| 2026-07-03 | ALK89L | - | Jul 3, 04:20 UTC | Jul 3, 05:45 UTC | 1h 25m |
| 2026-07-01 | ALK217 | CMB → DOH | Jul 1, 00:40 UTC | Jul 1, 18:05 UTC | 17h 25m |
| 2026-06-30 | ALK191 | - | Jun 30, 20:05 UTC | Jun 30, 22:40 UTC | 2h 35m |
| 2026-06-29 | ALK104 | - | Jun 29, 17:45 UTC | Jun 29, 17:59 UTC | 15m |
| 2026-06-28 | ALK103D | - | Jun 28, 00:04 UTC | Jun 28, 16:39 UTC | 16h 35m |
| 2026-06-26 | ALK115 | - | Jun 26, 08:34 UTC | Jun 26, 08:45 UTC | 10m |
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-ANE page for operator, model, and routing details .