Apparatus

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sensors Mode-S transponder

770454

ICAO 24-bit transponder address · allocated to Sri Lanka

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

Hex
770454
Octal
35602124
Decimal
7,799,892
Country
LK
Tail
4R-ABT
Type
A320
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
232
Distinct callsigns
20
Country
LK
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S 770454.

Country allocation

The ICAO 24-bit address 770454 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
ALK191 - 18 2026-07-09
ALK402 SriLankan Airlines 17 2026-07-25
ALK308 SriLankan Airlines 14 2026-07-26
ALK403 SriLankan Airlines 13 2026-07-25
ALK192 - 13 2026-07-10
ALK318 SriLankan Airlines 12 2026-07-21
ALK309 SriLankan Airlines 11 2026-07-26
ALK144 - 11 2026-07-16
ALK306 SriLankan Airlines 9 2026-07-23
ALK143 SriLankan Airlines 9 2026-07-16
ALK364 - 8 2026-06-21
ALK307 SriLankan Airlines 7 2026-07-24
ALK184 SriLankan Airlines 7 2026-07-14
ALK183 - 7 2026-07-14
ALK404 - 6 2026-07-15
ALK365 - 6 2026-06-21
ALK319 SriLankan Airlines 6 2026-07-22
ALK314 - 6 2026-07-12
ALK405 - 4 2026-07-16
ALK218 - 4 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ALK309 SIN → CMB Jul 26, 12:35 UTCJul 26, 23:00 UTC10h 25m
2026-07-26 ALK308 CMB → SIN Jul 26, 01:00 UTCJul 26, 10:50 UTC9h 51m
2026-07-25 ALK402 CMB → BKK Jul 25, 22:45 UTCJul 25, 23:25 UTC40m
2026-07-25 ALK403 BKK → CMB Jul 25, 01:05 UTCJul 25, 23:25 UTC22h 20m
2026-07-25 ALK403 BKK → CMB Jul 25, 00:55 UTCJul 25, 23:00 UTC22h 5m
2026-07-24 ALK402 CMB → BKK Jul 24, 22:40 UTCJul 24, 23:05 UTC25m
2026-07-24 ALK307 SIN → CMB Jul 24, 02:15 UTCJul 24, 23:05 UTC20h 50m
2026-07-23 ALK306 CMB → SIN Jul 23, 23:25 UTCJul 24, 00:20 UTC55m
2026-07-23 ALK403 BKK → CMB Jul 23, 01:05 UTCJul 24, 00:20 UTC23h 15m
2026-07-22 ALK402 CMB → BKK Jul 22, 22:15 UTCJul 22, 23:05 UTC50m
2026-07-22 ALK319 KUL → CMB Jul 22, 01:10 UTCJul 22, 11:35 UTC10h 25m
2026-07-21 ALK318 CMB → KUL Jul 21, 12:25 UTCJul 21, 23:10 UTC10h 45m
2026-07-21 ALK308 CMB → SIN Jul 21, 01:00 UTCJul 21, 10:45 UTC9h 45m
2026-07-20 ALK309 SIN → CMB Jul 20, 12:35 UTCJul 20, 23:05 UTC10h 30m
2026-07-20 ALK308 CMB → SIN Jul 20, 01:10 UTCJul 20, 10:50 UTC9h 40m
2026-07-19 ALK309 SIN → CMB Jul 19, 12:50 UTCJul 19, 22:55 UTC10h 5m
2026-07-19 ALK308 CMB → SIN Jul 19, 00:55 UTCJul 19, 10:40 UTC9h 45m
2026-07-18 ALK318 CMB → KUL Jul 18, 07:25 UTCJul 18, 22:55 UTC15h 30m
2026-07-18 ALK318 CMB → KUL Jul 18, 01:05 UTCJul 18, 22:55 UTC21h 51m
2026-07-18 ALK318 CMB → KUL Jul 18, 00:55 UTCJul 18, 22:55 UTC22h 1m
2026-07-17 ALK402 - Jul 17, 22:35 UTCJul 17, 23:00 UTC25m
2026-07-17 ALK402 - Jul 17, 01:09 UTCJul 17, 23:00 UTC21h 50m
2026-07-16 ALK402 - Jul 16, 22:45 UTCJul 16, 23:15 UTC30m
2026-07-16 ALK144 - Jul 16, 15:30 UTCJul 16, 17:00 UTC1h 30m
2026-07-16 ALK143 CMB → BOM Jul 16, 12:20 UTCJul 16, 14:20 UTC2h 0m
2026-07-16 ALK405 - Jul 16, 07:20 UTCJul 16, 08:45 UTC1h 25m
2026-07-15 ALK404 - Jul 15, 21:55 UTCJul 16, 05:50 UTC7h 55m
2026-07-15 ALK173 - Jul 15, 01:05 UTCJul 15, 20:30 UTC19h 25m
2026-07-15 ALK403 - Jul 15, 00:55 UTCJul 15, 20:30 UTC19h 35m
2026-07-14 ALK402 - Jul 14, 23:05 UTCJul 14, 23:30 UTC25m
2026-07-14 ALK184 KHI → CMB Jul 14, 13:30 UTCJul 14, 16:00 UTC2h 30m
2026-07-14 ALK183 - Jul 14, 00:50 UTCJul 14, 11:15 UTC10h 25m
2026-07-13 ALK405 - Jul 13, 07:01 UTCJul 13, 23:10 UTC16h 10m
2026-07-12 ALK404 - Jul 12, 13:55 UTCJul 13, 05:20 UTC15h 25m
2026-07-12 ALK315 - Jul 12, 07:20 UTCJul 13, 05:20 UTC22h 0m
2026-07-12 ALK314 - Jul 12, 05:10 UTCJul 12, 05:50 UTC40m
2026-07-11 ALK218 - Jul 11, 19:25 UTCJul 11, 23:45 UTC4h 20m
2026-07-11 ALK217 CMB → DOH Jul 11, 10:50 UTCJul 11, 17:50 UTC7h 0m
2026-07-11 ALK152 - Jul 11, 02:25 UTCJul 11, 04:55 UTC2h 30m
2026-07-10 ALK151 - Jul 10, 15:55 UTCJul 11, 00:10 UTC8h 15m
2026-07-10 ALK171 CMB → BLR Jul 10, 14:05 UTCJul 10, 14:50 UTC45m
2026-07-10 ALK168 - Jul 10, 10:50 UTCJul 10, 11:25 UTC35m
2026-07-10 ALK192 - Jul 10, 00:30 UTCJul 10, 02:45 UTC2h 15m
2026-07-09 ALK191 - Jul 9, 20:10 UTCJul 9, 22:35 UTC2h 25m
2026-07-09 ALK184 KHI → CMB Jul 9, 13:20 UTCJul 9, 15:55 UTC2h 35m
2026-07-09 ALK183 - Jul 9, 04:40 UTCJul 9, 11:10 UTC6h 30m
2026-07-08 ALK1173 - Jul 8, 21:55 UTCJul 9, 03:15 UTC5h 20m
2026-07-08 ALK307 - Jul 8, 02:10 UTCJul 8, 20:30 UTC18h 20m
2026-07-07 ALK306 - Jul 7, 13:35 UTCJul 8, 00:40 UTC11h 5m
2026-07-07 ALK195 - Jul 7, 02:40 UTCJul 7, 12:00 UTC9h 20m

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

Mode-S 770454 frequently asked

What is Mode-S code 770454?
770454 is an ICAO 24-bit transponder address. Allocated to Sri Lanka. Assigned to 4R-ABT.
Where is Mode-S 770454 registered?
Mode-S code 770454 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 770454 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 770454, octal 35602124, decimal 7,799,892.
What flights does 770454 operate?
Mode-S 770454 has broadcast 20 distinct callsigns, including ALK191, ALK402, ALK308, ALK403, ALK192.