Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

77181F

ICAO 24-bit transponder address · allocated to Sri Lanka

Currently assigned to 4R-EXR · AIRBUS A-320

Hex
77181F
Octal
35614037
Decimal
7,804,959
Country
LK
Tail
4R-EXR
Type
A320
No current signal · last broadcast 2d ago
Flights observed
70
Distinct callsigns
13
Country
LK
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 77181F.

Country allocation

The ICAO 24-bit address 77181F 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 13 distinct

Callsign Airline Flights Last seen
EXV824 Expo Aviation 13 2026-05-24
EXV911 Expo Aviation 12 2026-05-23
EXV921 Expo Aviation 11 2026-05-27
EXV912 Expo Aviation 10 2026-05-23
EXV922 Expo Aviation 5 2026-05-15
EXV823 Expo Aviation 5 2026-05-03
EXV982 Expo Aviation 4 2026-04-25
EXV721 Expo Aviation 3 2026-04-26
EXV981 Expo Aviation 2 2026-05-01
EXV722 Expo Aviation 2 2026-04-26
EXV924 - 1 2026-04-16
EXV923 Expo Aviation 1 2026-04-16
EXV622 - 1 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-27 EXV921 CMB → MLE May 27, 01:59 UTCMay 27, 04:45 UTC2h 45m
2026-05-26 EXV921 CMB → MLE May 26, 02:00 UTCMay 26, 05:45 UTC3h 45m
2026-05-25 EXV622 - May 25, 05:35 UTCMay 26, 02:10 UTC20h 35m
2026-05-24 EXV824 DXB → CMB May 24, 14:40 UTCMay 25, 05:45 UTC15h 5m
2026-05-24 EXV824 DXB → CMB May 24, 07:50 UTCMay 25, 05:45 UTC21h 55m
2026-05-24 EXV824 DXB → CMB May 24, 07:20 UTCMay 25, 05:45 UTC22h 25m
2026-05-23 EXV824 DXB → CMB May 23, 22:05 UTCMay 24, 16:30 UTC18h 25m
2026-05-23 EXV912 DAC → CMB May 23, 21:00 UTCMay 24, 16:30 UTC19h 30m
2026-05-23 EXV911 CMB → DAC May 23, 10:55 UTCMay 23, 19:25 UTC8h 30m
2026-05-21 EXV824 DXB → CMB May 21, 15:25 UTCMay 22, 05:35 UTC14h 10m
2026-05-21 EXV824 DXB → CMB May 21, 07:50 UTCMay 22, 05:35 UTC21h 45m
2026-05-21 EXV824 DXB → CMB May 21, 07:30 UTCMay 22, 05:35 UTC22h 5m
2026-05-16 EXV921 CMB → MLE May 16, 02:15 UTCMay 16, 05:40 UTC3h 25m
2026-05-15 EXV922 MLE → CMB May 15, 05:20 UTCMay 16, 02:25 UTC21h 4m
2026-05-15 EXV921 CMB → MLE May 15, 02:05 UTCMay 15, 05:30 UTC3h 25m
2026-05-14 EXV824 DXB → CMB May 14, 07:20 UTCMay 14, 16:50 UTC9h 30m
2026-05-11 EXV912 DAC → CMB May 11, 20:40 UTCMay 12, 04:50 UTC8h 10m
2026-05-11 EXV911 CMB → DAC May 11, 02:00 UTCMay 11, 19:10 UTC17h 10m
2026-05-09 EXV824 DXB → CMB May 9, 21:50 UTCMay 10, 16:50 UTC19h 0m
2026-05-09 EXV912 DAC → CMB May 9, 20:44 UTCMay 10, 16:50 UTC20h 5m
2026-05-09 EXV911 CMB → DAC May 9, 02:25 UTCMay 9, 19:05 UTC16h 40m
2026-05-07 EXV912 DAC → CMB May 7, 20:30 UTCMay 7, 22:54 UTC2h 24m
2026-05-07 EXV911 CMB → DAC May 7, 16:55 UTCMay 7, 19:05 UTC2h 10m
2026-05-05 EXV912 DAC → CMB May 5, 20:01 UTCMay 6, 04:55 UTC8h 54m
2026-05-05 EXV911 CMB → DAC May 5, 16:20 UTCMay 5, 18:25 UTC2h 5m
2026-05-04 EXV911 CMB → DAC May 4, 21:50 UTCMay 5, 18:25 UTC20h 35m
2026-05-04 EXV912 DAC → CMB May 4, 20:50 UTCMay 5, 18:25 UTC21h 35m
2026-05-04 EXV911 CMB → DAC May 4, 17:30 UTCMay 4, 18:50 UTC1h 21m
2026-05-03 EXV824 DXB → CMB May 3, 13:00 UTCMay 3, 16:45 UTC3h 45m
2026-05-03 EXV823 CMB → DXB May 3, 10:55 UTCMay 3, 11:15 UTC20m
2026-05-02 EXV823 CMB → DXB May 2, 17:40 UTCMay 3, 09:05 UTC15h 24m
2026-05-01 EXV981 CMB → LHE May 1, 21:50 UTCMay 2, 15:50 UTC18h 1m
2026-05-01 EXV912 DAC → CMB May 1, 20:25 UTCMay 2, 15:50 UTC19h 26m
2026-05-01 EXV911 CMB → DAC May 1, 02:05 UTCMay 1, 18:55 UTC16h 50m
2026-04-30 EXV911 CMB → DAC Apr 30, 21:50 UTCMay 1, 18:55 UTC21h 5m
2026-04-30 EXV912 DAC → CMB Apr 30, 20:35 UTCMay 1, 18:55 UTC22h 20m
2026-04-30 EXV911 CMB → DAC Apr 30, 16:55 UTCApr 30, 19:15 UTC2h 20m
2026-04-30 EXV824 DXB → CMB Apr 30, 09:15 UTCApr 30, 13:00 UTC3h 45m
2026-04-30 EXV823 CMB → DXB Apr 30, 06:50 UTCApr 30, 07:10 UTC20m
2026-04-30 EXV823 CMB → DXB Apr 30, 03:30 UTCApr 30, 05:05 UTC1h 35m
2026-04-29 EXV823 CMB → DXB Apr 29, 05:05 UTCApr 30, 03:45 UTC22h 40m
2026-04-28 EXV912 DAC → CMB Apr 28, 20:05 UTCApr 29, 05:15 UTC9h 10m
2026-04-28 EXV911 CMB → DAC Apr 28, 02:00 UTCApr 28, 18:30 UTC16h 30m
2026-04-26 EXV722 KUL → CMB Apr 26, 06:15 UTCApr 26, 06:35 UTC20m
2026-04-26 EXV721 CMB → KUL Apr 26, 04:10 UTCApr 26, 04:35 UTC25m
2026-04-25 EXV982 LHE → CMB Apr 25, 17:05 UTCApr 25, 19:55 UTC2h 50m
2026-04-25 EXV981 CMB → LHE Apr 25, 02:10 UTCApr 25, 14:50 UTC12h 40m
2026-04-24 EXV921 CMB → MLE Apr 24, 02:10 UTCApr 24, 02:20 UTC10m
2026-04-23 EXV721 CMB → KUL Apr 23, 04:10 UTCApr 23, 04:20 UTC10m
2026-04-22 EXV921 CMB → MLE Apr 22, 02:00 UTCApr 22, 04:40 UTC2h 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-EXR page for operator, model, and routing details .

Mode-S 77181F frequently asked

What is Mode-S code 77181F?
77181F is an ICAO 24-bit transponder address. Allocated to Sri Lanka. Assigned to 4R-EXR.
Where is Mode-S 77181F registered?
Mode-S code 77181F 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 77181F broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 77181F, octal 35614037, decimal 7,804,959.
What flights does 77181F operate?
Mode-S 77181F has broadcast 13 distinct callsigns, including EXV824, EXV911, EXV921, EXV912, EXV922.