Apparatus

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sensors Mode-S transponder

77044E

ICAO 24-bit transponder address · allocated to Sri Lanka

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

Hex
77044E
Octal
35602116
Decimal
7,799,886
Country
LK
Tail
4R-ABN
Type
A320
No current signal · last broadcast 13d ago
Flights observed
44
Distinct callsigns
20
Country
LK
Last broadcast
13d ago

Last known position

Most recent position reported by Mode-S 77044E.

Country allocation

The ICAO 24-bit address 77044E 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
ALK195 SriLankan Airlines 4 2026-05-15
ALK191 SriLankan Airlines 4 2026-04-24
ALK196 SriLankan Airlines 3 2026-05-14
ALK309 - 2 2026-04-14
ALK192 SriLankan Airlines 2 2026-04-19
ALK184 SriLankan Airlines 2 2026-05-12
ALK172 SriLankan Airlines 2 2026-05-11
ALK171 SriLankan Airlines 2 2026-05-11
ALK152 SriLankan Airlines 2 2026-05-16
ALK142 SriLankan Airlines 2 2026-04-25
ALK141 SriLankan Airlines 2 2026-04-25
ALK403 SriLankan Airlines 1 2026-05-13
ALK402 SriLankan Airlines 1 2026-05-12
ALK365 SriLankan Airlines 1 2026-04-18
ALK364 SriLankan Airlines 1 2026-04-18
ALK319 - 1 2026-04-13
ALK308 SriLankan Airlines 1 2026-04-14
ALK307 SriLankan Airlines 1 2026-04-17
ALK306 SriLankan Airlines 1 2026-04-16
ALK183 SriLankan Airlines 1 2026-05-12

Recent flights last 44

DateFlightRouteTakeoffLandingDuration
2026-05-16 ALK152 KHI → CMB May 16, 02:45 UTCMay 16, 05:15 UTC2h 30m
2026-05-15 ALK151 CMB → KHI May 15, 13:35 UTCMay 16, 00:25 UTC10h 49m
2026-05-15 ALK195 CMB → DEL May 15, 09:30 UTCMay 15, 11:45 UTC2h 15m
2026-05-14 ALK195 CMB → DEL May 14, 15:45 UTCMay 15, 11:45 UTC20h 0m
2026-05-14 ALK196 DEL → CMB May 14, 13:45 UTCMay 15, 11:45 UTC22h 0m
2026-05-14 ALK195 CMB → DEL May 14, 09:40 UTCMay 14, 12:10 UTC2h 30m
2026-05-14 ALK162 TRV → CMB May 14, 05:00 UTCMay 14, 05:20 UTC20m
2026-05-14 ALK161 CMB → TRV May 14, 03:25 UTCMay 14, 03:50 UTC25m
2026-05-13 ALK403 BKK → CMB May 13, 01:15 UTCMay 13, 01:40 UTC25m
2026-05-12 ALK402 CMB → BKK May 12, 22:31 UTCMay 12, 23:20 UTC50m
2026-05-12 ALK184 KHI → CMB May 12, 13:35 UTCMay 12, 16:00 UTC2h 25m
2026-05-12 ALK183 CMB → KHI May 12, 08:45 UTCMay 12, 11:20 UTC2h 35m
2026-05-11 ALK172 BLR → CMB May 11, 16:15 UTCMay 11, 16:45 UTC30m
2026-05-11 ALK171 CMB → BLR May 11, 13:55 UTCMay 11, 14:40 UTC45m
2026-05-07 ALK184 KHI → CMB May 7, 09:20 UTCMay 7, 15:40 UTC6h 20m
2026-04-26 ALK152 KHI → CMB Apr 26, 22:00 UTCApr 27, 04:45 UTC6h 45m
2026-04-25 ALK142 BOM → CMB Apr 25, 22:35 UTCApr 25, 23:45 UTC1h 10m
2026-04-25 ALK142 BOM → CMB Apr 25, 21:50 UTCApr 25, 22:05 UTC15m
2026-04-25 ALK141 CMB → BOM Apr 25, 02:20 UTCApr 25, 20:30 UTC18h 10m
2026-04-25 ALK141 CMB → BOM Apr 25, 00:10 UTCApr 25, 20:30 UTC20h 20m
2026-04-24 ALK191 CMB → DEL Apr 24, 20:05 UTCApr 24, 22:20 UTC2h 15m
2026-04-22 ALK123 CMB → MAA Apr 22, 14:00 UTCApr 22, 14:10 UTC10m
2026-04-20 ALK174 BLR → CMB Apr 20, 22:05 UTCApr 20, 22:40 UTC35m
2026-04-20 ALK144 - Apr 20, 02:20 UTCApr 20, 20:35 UTC18h 16m
2026-04-19 ALK172 - Apr 19, 16:20 UTCApr 20, 00:10 UTC7h 50m
2026-04-19 ALK171 CMB → BLR Apr 19, 14:25 UTCApr 19, 14:55 UTC30m
2026-04-19 ALK166 COK → CMB Apr 19, 06:20 UTCApr 19, 06:50 UTC30m
2026-04-19 ALK165 CMB → COK Apr 19, 05:00 UTCApr 19, 05:20 UTC20m
2026-04-19 ALK192 DEL → CMB Apr 19, 00:05 UTCApr 19, 02:40 UTC2h 35m
2026-04-18 ALK191 CMB → DEL Apr 18, 14:00 UTCApr 18, 22:25 UTC8h 25m
2026-04-18 ALK365 CGK → CMB Apr 18, 08:05 UTCApr 18, 08:20 UTC15m
2026-04-18 ALK364 CMB → CGK Apr 18, 06:10 UTCApr 18, 06:30 UTC20m
2026-04-17 ALK196 - Apr 17, 16:00 UTCApr 17, 16:25 UTC25m
2026-04-17 ALK196 - Apr 17, 13:50 UTCApr 17, 14:25 UTC35m
2026-04-17 ALK195 CMB → DEL Apr 17, 11:25 UTCApr 17, 12:15 UTC50m
2026-04-17 ALK307 SIN → CMB Apr 17, 02:15 UTCApr 17, 02:55 UTC40m
2026-04-16 ALK306 CMB → SIN Apr 16, 23:20 UTCApr 17, 00:10 UTC50m
2026-04-16 ALK192 DEL → CMB Apr 16, 00:00 UTCApr 16, 00:30 UTC30m
2026-04-15 ALK191 CMB → DEL Apr 15, 22:00 UTCApr 15, 22:40 UTC40m
2026-04-15 ALK191 CMB → DEL Apr 15, 20:15 UTCApr 15, 20:25 UTC10m
2026-04-14 ALK309 - Apr 14, 12:50 UTCApr 14, 13:10 UTC20m
2026-04-14 ALK309 - Apr 14, 12:35 UTCApr 14, 12:45 UTC10m
2026-04-14 ALK308 CMB → SIN Apr 14, 09:50 UTCApr 14, 10:40 UTC50m
2026-04-13 ALK319 - Apr 13, 00:55 UTCApr 13, 01:20 UTC25m

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-ABN page for operator, model, and routing details .

Mode-S 77044E frequently asked

What is Mode-S code 77044E?
77044E is an ICAO 24-bit transponder address. Allocated to Sri Lanka. Assigned to 4R-ABN.
Where is Mode-S 77044E registered?
Mode-S code 77044E 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 77044E broadcasting right now?
No active broadcast right now. Last signal was 13d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 77044E, octal 35602116, decimal 7,799,886.
What flights does 77044E operate?
Mode-S 77044E has broadcast 20 distinct callsigns, including ALK195, ALK191, ALK196, ALK309, ALK192.