Apparatus

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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
No current signal · last broadcast 59m ago
Flights observed
67
Distinct callsigns
10
Country
LK
Last broadcast
59m ago

Last known position

Most recent position reported by Mode-S 77170D.

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 10 distinct

Callsign Airline Flights Last seen
EXV911 Expo Aviation 24 2026-06-01
EXV912 Expo Aviation 20 2026-06-01
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
EXV923 Expo Aviation 1 2026-04-30
EXV922 Expo Aviation 1 2026-04-26
EV923 - 1 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-01 EXV912 DAC → CMB Jun 1, 20:55 UTCJun 2, 18:50 UTC21h 55m
2026-06-01 EXV911 CMB → DAC Jun 1, 17:40 UTCJun 1, 19:50 UTC2h 10m
2026-05-30 EXV912 DAC → CMB May 30, 20:50 UTCMay 30, 21:10 UTC20m
2026-05-30 EXV911 CMB → DAC May 30, 17:40 UTCMay 30, 19:00 UTC1h 20m
2026-05-29 EXV911 CMB → DAC May 29, 21:25 UTCMay 30, 19:00 UTC21h 35m
2026-05-29 EXV912 DAC → CMB May 29, 20:20 UTCMay 30, 19:00 UTC22h 40m
2026-05-29 EXV911 CMB → DAC May 29, 02:15 UTCMay 29, 19:00 UTC16h 45m
2026-05-28 EXV911 CMB → DAC May 28, 21:45 UTCMay 29, 19:00 UTC21h 15m
2026-05-28 EXV912 DAC → CMB May 28, 20:40 UTCMay 29, 19:00 UTC22h 20m
2026-05-28 EXV911 CMB → DAC May 28, 17:45 UTCMay 28, 19:15 UTC1h 30m
2026-05-26 EXV912 DAC → CMB May 26, 20:09 UTCMay 26, 22:29 UTC2h 20m
2026-05-26 EXV911 CMB → DAC May 26, 16:30 UTCMay 26, 18:40 UTC2h 10m
2026-05-25 EXV911 CMB → DAC May 25, 21:54 UTCMay 26, 18:40 UTC20h 45m
2026-05-25 EXV912 DAC → CMB May 25, 20:50 UTCMay 26, 18:40 UTC21h 50m
2026-05-25 EXV911 CMB → DAC May 25, 18:30 UTCMay 25, 18:50 UTC20m
2026-05-25 EXV911 CMB → DAC May 25, 16:40 UTCMay 25, 17:45 UTC1h 5m
2026-05-22 EXV912 DAC → CMB May 22, 21:40 UTCMay 22, 22:45 UTC1h 5m
2026-05-22 EXV912 DAC → CMB May 22, 20:40 UTCMay 22, 20:55 UTC15m
2026-05-22 EXV911 CMB → DAC May 22, 17:15 UTCMay 22, 19:25 UTC2h 10m
2026-05-21 EXV911 CMB → DAC May 21, 22:55 UTCMay 22, 19:25 UTC20h 30m
2026-05-21 EXV912 DAC → CMB May 21, 20:50 UTCMay 22, 19:15 UTC22h 25m
2026-05-21 EXV911 CMB → DAC May 21, 19:05 UTCMay 21, 19:30 UTC25m
2026-05-21 EV923 - May 21, 11:10 UTCMay 21, 17:20 UTC6h 10m
2026-05-19 EXV912 DAC → CMB May 19, 23:50 UTCMay 20, 05:20 UTC5h 31m
2026-05-19 EXV912 DAC → CMB May 19, 21:50 UTCMay 19, 22:05 UTC15m
2026-05-19 EXV911 CMB → DAC May 19, 10:40 UTCMay 19, 20:00 UTC9h 20m
2026-05-16 EXV912 DAC → CMB May 16, 20:50 UTCMay 17, 05:30 UTC8h 40m
2026-05-16 EXV911 CMB → DAC May 16, 16:55 UTCMay 16, 19:05 UTC2h 10m
2026-05-14 EXV912 DAC → CMB May 14, 20:20 UTCMay 14, 22:40 UTC2h 20m
2026-05-14 EXV911 CMB → DAC May 14, 16:55 UTCMay 14, 19:10 UTC2h 15m
2026-05-08 EXV921 CMB → MLE May 8, 02:04 UTCMay 8, 04:54 UTC2h 50m
2026-05-07 EXV823 CMB → DXB May 7, 07:35 UTCMay 8, 04:54 UTC21h 20m
2026-05-05 EXV921 CMB → MLE May 5, 02:15 UTCMay 5, 06:00 UTC3h 45m
2026-05-03 EXV722 KUL → CMB May 3, 06:10 UTCMay 3, 06:30 UTC20m
2026-05-02 EXV912 DAC → CMB May 2, 20:15 UTCMay 3, 04:15 UTC7h 59m
2026-05-02 EXV911 CMB → DAC May 2, 06:20 UTCMay 2, 18:50 UTC12h 30m
2026-05-02 EXV721 CMB → KUL May 2, 03:55 UTCMay 2, 04:25 UTC30m
2026-04-30 EXV923 CMB → MLE Apr 30, 11:15 UTCApr 30, 14:05 UTC2h 50m
2026-04-29 EXV722 KUL → CMB Apr 29, 05:15 UTCApr 29, 05:35 UTC20m
2026-04-29 EXV721 CMB → KUL Apr 29, 03:00 UTCApr 29, 03:34 UTC35m
2026-04-26 EXV824 DXB → CMB Apr 26, 12:40 UTCApr 26, 16:30 UTC3h 50m
2026-04-26 EXV823 CMB → DXB Apr 26, 07:00 UTCApr 26, 10:50 UTC3h 50m
2026-04-26 EXV922 MLE → CMB Apr 26, 02:05 UTCApr 26, 05:05 UTC3h 0m
2026-04-25 EXV722 KUL → CMB Apr 25, 06:25 UTCApr 26, 05:05 UTC22h 40m
2026-04-24 EXV912 DAC → CMB Apr 24, 20:40 UTCApr 24, 22:10 UTC1h 30m
2026-04-24 EXV911 CMB → DAC Apr 24, 17:35 UTCApr 24, 18:55 UTC1h 20m
2026-04-23 EXV911 CMB → DAC Apr 23, 21:20 UTCApr 24, 18:55 UTC21h 35m
2026-04-23 EXV912 DAC → CMB Apr 23, 20:35 UTCApr 24, 18:55 UTC22h 20m
2026-04-23 EXV911 CMB → DAC Apr 23, 17:40 UTCApr 23, 18:55 UTC1h 15m
2026-04-23 EXV824 DXB → CMB Apr 23, 09:05 UTCApr 23, 12:55 UTC3h 50m

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 .

Mode-S 77170D frequently asked

What is Mode-S code 77170D?
77170D is an ICAO 24-bit transponder address. Allocated to Sri Lanka. Assigned to 4R-EXS.
Where is Mode-S 77170D registered?
Mode-S code 77170D is allocated to Sri Lanka (LK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 77170D broadcasting right now?
No active broadcast right now. Last signal was 59m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 77170D, octal 35613415, decimal 7,804,685.
What flights does 77170D operate?
Mode-S 77170D has broadcast 10 distinct callsigns, including EXV911, EXV912, EXV823, EXV722, EXV824.