sensors Mode-S transponder
77170D
ICAO 24-bit transponder address · allocated to Sri Lanka
Currently assigned to 4R-EXS · AIRBUS A-320
- Hex
- 77170D
- Octal
- 35613415
- Decimal
- 7,804,685
- Country
- LK
- Tail
- 4R-EXS
- Type
- A320
- Flights observed
- 163
- Distinct callsigns
- 15
- Country
- LK
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 77170D 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 15 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| EXV911 | - | 69 | 2026-07-17 |
| EXV912 | - | 41 | 2026-07-17 |
| EXV821 | - | 18 | 2026-07-13 |
| EXV822 | - | 9 | 2026-07-13 |
| EXV823 | Expo Aviation | 6 | 2026-05-07 |
| EXV722 | Expo Aviation | 5 | 2026-05-03 |
| EXV824 | Expo Aviation | 4 | 2026-04-26 |
| EXV721 | Expo Aviation | 3 | 2026-05-02 |
| EXV921 | Expo Aviation | 2 | 2026-05-08 |
| EXV964 | - | 1 | 2026-07-16 |
| EXV962 | - | 1 | 2026-07-14 |
| EXV961 | - | 1 | 2026-07-14 |
| EXV923 | Expo Aviation | 1 | 2026-04-30 |
| EXV922 | Expo Aviation | 1 | 2026-04-26 |
| EV923 | - | 1 | 2026-05-21 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-17 | EXV912 | - | Jul 17, 20:40 UTC | Jul 18, 02:05 UTC | 5h 25m |
| 2026-07-17 | EXV911 | - | Jul 17, 17:40 UTC | Jul 17, 19:09 UTC | 1h 30m |
| 2026-07-16 | EXV964 | - | Jul 16, 20:39 UTC | Jul 17, 13:29 UTC | 16h 50m |
| 2026-07-16 | EXV911 | - | Jul 16, 17:40 UTC | Jul 16, 19:10 UTC | 1h 30m |
| 2026-07-15 | EXV911 | - | Jul 15, 21:20 UTC | Jul 16, 19:10 UTC | 21h 50m |
| 2026-07-15 | EXV912 | - | Jul 15, 20:20 UTC | Jul 15, 21:40 UTC | 1h 20m |
| 2026-07-15 | EXV911 | - | Jul 15, 17:40 UTC | Jul 15, 19:10 UTC | 1h 30m |
| 2026-07-14 | EXV962 | - | Jul 14, 22:20 UTC | Jul 15, 00:35 UTC | 2h 14m |
| 2026-07-14 | EXV961 | - | Jul 14, 02:00 UTC | Jul 14, 20:10 UTC | 18h 10m |
| 2026-07-13 | EXV822 | - | Jul 13, 19:45 UTC | Jul 13, 23:40 UTC | 3h 55m |
| 2026-07-13 | EXV821 | - | Jul 13, 17:10 UTC | Jul 13, 17:35 UTC | 25m |
| 2026-07-13 | EXV821 | - | Jul 13, 14:05 UTC | Jul 13, 15:30 UTC | 1h 25m |
| 2026-07-12 | EXV822 | - | Jul 12, 19:40 UTC | Jul 12, 23:35 UTC | 3h 55m |
| 2026-07-12 | EXV821 | - | Jul 12, 01:55 UTC | Jul 12, 17:30 UTC | 15h 35m |
| 2026-07-11 | EXV821 | - | Jul 11, 21:20 UTC | Jul 12, 17:30 UTC | 20h 10m |
| 2026-07-11 | EXV912 | - | Jul 11, 20:45 UTC | Jul 12, 17:30 UTC | 20h 45m |
| 2026-07-11 | EXV911 | - | Jul 11, 02:55 UTC | Jul 11, 19:00 UTC | 16h 5m |
| 2026-07-10 | EXV822 | - | Jul 10, 19:35 UTC | Jul 10, 23:25 UTC | 3h 50m |
| 2026-07-10 | EXV821 | - | Jul 10, 02:10 UTC | Jul 10, 17:40 UTC | 15h 30m |
| 2026-07-09 | EXV911 | - | Jul 9, 19:00 UTC | Jul 9, 20:30 UTC | 1h 30m |
| 2026-07-08 | EXV822 | - | Jul 8, 20:05 UTC | Jul 8, 23:45 UTC | 3h 40m |
| 2026-07-08 | EXV821 | - | Jul 8, 14:00 UTC | Jul 8, 17:30 UTC | 3h 30m |
| 2026-07-07 | EXV821 | - | Jul 7, 21:20 UTC | Jul 8, 17:30 UTC | 20h 10m |
| 2026-07-07 | EXV912 | - | Jul 7, 20:25 UTC | Jul 8, 17:30 UTC | 21h 5m |
| 2026-07-07 | EXV911 | - | Jul 7, 17:40 UTC | Jul 7, 19:05 UTC | 1h 25m |
| 2026-07-06 | EXV822 | - | Jul 6, 19:35 UTC | Jul 6, 23:30 UTC | 3h 55m |
| 2026-07-05 | EXV821 | - | Jul 5, 23:20 UTC | Jul 6, 18:05 UTC | 18h 45m |
| 2026-07-05 | EXV821 | - | Jul 5, 21:50 UTC | Jul 6, 18:05 UTC | 20h 15m |
| 2026-07-05 | EXV822 | - | Jul 5, 19:45 UTC | Jul 6, 18:05 UTC | 22h 20m |
| 2026-07-05 | EXV821 | - | Jul 5, 17:25 UTC | Jul 5, 17:55 UTC | 30m |
| 2026-07-04 | EXV821 | - | Jul 4, 21:20 UTC | Jul 5, 15:45 UTC | 18h 25m |
| 2026-07-04 | EXV912 | - | Jul 4, 20:20 UTC | Jul 5, 15:45 UTC | 19h 25m |
| 2026-07-04 | EXV911 | - | Jul 4, 02:10 UTC | Jul 4, 19:00 UTC | 16h 50m |
| 2026-07-03 | EXV912 | DAC → DAC | Jul 3, 20:35 UTC | Jul 4, 19:00 UTC | 22h 25m |
| 2026-07-03 | EXV911 | - | Jul 3, 02:05 UTC | Jul 3, 19:10 UTC | 17h 5m |
| 2026-07-02 | EXV822 | - | Jul 2, 19:45 UTC | Jul 2, 23:35 UTC | 3h 50m |
| 2026-07-02 | EXV821 | - | Jul 2, 14:00 UTC | Jul 2, 17:55 UTC | 3h 55m |
| 2026-07-01 | EXV822 | - | Jul 1, 19:45 UTC | Jul 1, 23:35 UTC | 3h 50m |
| 2026-07-01 | EXV821 | - | Jul 1, 13:50 UTC | Jul 1, 17:40 UTC | 3h 50m |
| 2026-06-30 | EXV821 | - | Jun 30, 21:20 UTC | Jul 1, 17:40 UTC | 20h 20m |
| 2026-06-30 | EXV912 | - | Jun 30, 20:10 UTC | Jul 1, 17:40 UTC | 21h 30m |
| 2026-06-30 | EXV911 | - | Jun 30, 02:00 UTC | Jun 30, 18:40 UTC | 16h 40m |
| 2026-06-29 | EXV911 | - | Jun 29, 21:19 UTC | Jun 30, 18:40 UTC | 21h 21m |
| 2026-06-29 | EXV912 | DAC → DAC | Jun 29, 20:30 UTC | Jun 30, 18:40 UTC | 22h 11m |
| 2026-06-28 | EXV911 | - | Jun 28, 23:20 UTC | Jun 29, 19:05 UTC | 19h 45m |
| 2026-06-28 | EXV911 | - | Jun 28, 21:55 UTC | Jun 29, 19:05 UTC | 21h 10m |
| 2026-06-28 | EXV911 | DST → DAC | Jun 28, 19:44 UTC | Jun 29, 19:05 UTC | 23h 20m |
| 2026-06-28 | EXV821 | - | Jun 28, 14:19 UTC | Jun 28, 18:00 UTC | 3h 40m |
| 2026-06-27 | EXV821 | - | Jun 27, 21:19 UTC | Jun 28, 18:00 UTC | 20h 40m |
| 2026-06-27 | EXV912 | - | Jun 27, 20:49 UTC | Jun 28, 18:00 UTC | 21h 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-EXS page for operator, model, and routing details .