Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

770590

ICAO 24-bit transponder address · allocated to Sri Lanka

Currently assigned to 4R-ALP · AIRBUS A-330-300

Hex
770590
Octal
35602620
Decimal
7,800,208
Country
LK
Tail
4R-ALP
Type
A333
No current signal · last broadcast Jul 26, 07:00 UTC
Flights observed
229
Distinct callsigns
20
Country
LK
Last broadcast
Jul 26, 07:00 UTC

Last known position

Most recent position reported by Mode-S 770590.

Country allocation

The ICAO 24-bit address 770590 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
ALK503 SriLankan Airlines 42 2026-07-23
ALK504 SriLankan Airlines 40 2026-07-23
ALK501 SriLankan Airlines 21 2026-06-07
ALK604 - 18 2026-06-22
ALK605 - 13 2026-06-22
ALK606 SriLankan Airlines 11 2026-07-25
ALK26L SriLankan Airlines 9 2026-07-20
ALK101 SriLankan Airlines 9 2026-07-23
ALK607 SriLankan Airlines 7 2026-07-26
ALK454 SriLankan Airlines 7 2026-07-24
ALK266 SriLankan Airlines 7 2026-07-22
ALK455 SriLankan Airlines 6 2026-07-25
ALK265 SriLankan Airlines 6 2026-07-22
ALK89L - 5 2026-06-30
ALK564 SriLankan Airlines 5 2026-04-15
ALK90L - 4 2026-06-30
ALK563 SriLankan Airlines 4 2026-04-15
ALK25L SriLankan Airlines 4 2026-06-30
ALK884 SriLankan Airlines 3 2026-07-13
ALK471 SriLankan Airlines 2 2026-04-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ALK607 SYD → CMB Jul 26, 06:25 UTCJul 26, 07:00 UTC36m
2026-07-25 ALK606 CMB → SYD Jul 25, 10:05 UTCJul 26, 04:35 UTC18h 30m
2026-07-25 ALK455 NRT → CMB Jul 25, 08:05 UTCJul 26, 04:35 UTC20h 30m
2026-07-25 ALK455 NRT → CMB Jul 25, 07:55 UTCJul 26, 04:35 UTC20h 40m
2026-07-25 ALK455 NRT → CMB Jul 25, 04:05 UTCJul 26, 04:00 UTC23h 55m
2026-07-25 ALK455 NRT → CMB Jul 25, 02:40 UTCJul 25, 10:05 UTC7h 25m
2026-07-24 ALK454 CMB → NRT Jul 24, 04:20 UTCJul 24, 23:20 UTC19h 0m
2026-07-24 ALK454 CMB → NRT Jul 24, 00:55 UTCJul 24, 23:20 UTC22h 25m
2026-07-23 ALK504 LHR → CMB Jul 23, 22:05 UTCJul 24, 21:25 UTC23h 20m
2026-07-23 ALK504 LHR → CMB Jul 23, 20:55 UTCJul 24, 19:55 UTC23h 0m
2026-07-23 ALK503 CMB → LHR Jul 23, 08:10 UTCJul 23, 18:55 UTC10h 45m
2026-07-23 ALK101 CMB → MLE Jul 23, 02:40 UTCJul 23, 05:35 UTC2h 55m
2026-07-22 ALK266 RUH → CMB Jul 22, 23:50 UTCJul 23, 00:35 UTC45m
2026-07-22 ALK265 CMB → RUH Jul 22, 13:35 UTCJul 22, 17:30 UTC3h 55m
2026-07-21 ALK504 LHR → CMB Jul 21, 21:10 UTCJul 22, 01:30 UTC4h 20m
2026-07-21 ALK503 CMB → LHR Jul 21, 08:05 UTCJul 21, 18:50 UTC10h 45m
2026-07-21 ALK122 MAA → CMB Jul 21, 04:35 UTCJul 21, 04:50 UTC15m
2026-07-21 ALK121 CMB → MAA Jul 21, 02:50 UTCJul 21, 03:05 UTC15m
2026-07-20 ALK26L DXB → CMB Jul 20, 20:35 UTCJul 21, 00:05 UTC3h 30m
2026-07-19 ALK504 LHR → CMB Jul 19, 22:05 UTCJul 20, 17:20 UTC19h 15m
2026-07-19 ALK504 LHR → CMB Jul 19, 20:55 UTCJul 20, 17:20 UTC20h 25m
2026-07-19 ALK503 - Jul 19, 12:05 UTCJul 19, 19:05 UTC7h 0m
2026-07-19 ALK503 - Jul 19, 08:10 UTCJul 19, 11:35 UTC3h 25m
2026-07-18 ALK26L DXB → CMB Jul 18, 19:40 UTCJul 18, 23:35 UTC3h 55m
2026-07-18 ALK455 - Jul 18, 02:40 UTCJul 18, 14:30 UTC11h 51m
2026-07-17 ALK454 - Jul 17, 07:44 UTCJul 17, 23:35 UTC15h 50m
2026-07-17 ALK454 - Jul 17, 02:05 UTCJul 17, 23:35 UTC21h 30m
2026-07-17 ALK454 - Jul 17, 00:04 UTCJul 17, 23:35 UTC23h 30m
2026-07-16 ALK504 - Jul 16, 22:15 UTCJul 17, 21:39 UTC23h 25m
2026-07-16 ALK503 - Jul 16, 08:00 UTCJul 16, 18:55 UTC10h 55m
2026-07-16 ALK101 - Jul 16, 02:30 UTCJul 16, 05:25 UTC2h 55m
2026-07-15 ALK266 - Jul 15, 13:15 UTCJul 16, 00:20 UTC11h 5m
2026-07-14 ALK504 - Jul 14, 21:00 UTCJul 15, 06:25 UTC9h 24m
2026-07-14 ALK503 - Jul 14, 08:00 UTCJul 14, 18:45 UTC10h 45m
2026-07-13 ALK885 - Jul 13, 20:15 UTCJul 14, 05:50 UTC9h 35m
2026-07-13 ALK884 CMB → CAN Jul 13, 17:25 UTCJul 13, 17:40 UTC15m
2026-07-12 ALK504 - Jul 12, 21:20 UTCJul 13, 15:30 UTC18h 10m
2026-07-12 ALK503 - Jul 12, 15:10 UTCJul 12, 19:01 UTC3h 50m
2026-07-12 ALK503 - Jul 12, 08:10 UTCJul 12, 14:35 UTC6h 25m
2026-07-11 ALK265 - Jul 11, 13:30 UTCJul 12, 00:35 UTC11h 5m
2026-07-11 ALK455 - Jul 11, 02:45 UTCJul 11, 09:35 UTC6h 50m
2026-07-10 ALK454 - Jul 10, 04:05 UTCJul 10, 23:20 UTC19h 15m
2026-07-10 ALK454 - Jul 10, 01:10 UTCJul 10, 23:20 UTC22h 10m
2026-07-09 ALK504 - Jul 9, 22:05 UTCJul 10, 22:00 UTC23h 55m
2026-07-09 ALK504 - Jul 9, 20:55 UTCJul 10, 20:00 UTC23h 5m
2026-07-09 ALK503 - Jul 9, 08:05 UTCJul 9, 19:00 UTC10h 55m
2026-07-09 ALK101 - Jul 9, 02:35 UTCJul 9, 05:25 UTC2h 50m
2026-07-08 ALK265 - Jul 8, 13:15 UTCJul 9, 00:40 UTC11h 25m
2026-07-07 ALK504 - Jul 7, 20:55 UTCJul 8, 06:30 UTC9h 35m
2026-07-07 ALK503 - Jul 7, 08:15 UTCJul 7, 18:50 UTC10h 35m

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

Mode-S 770590 frequently asked

What is Mode-S code 770590?
770590 is an ICAO 24-bit transponder address. Allocated to Sri Lanka. Assigned to 4R-ALP.
Where is Mode-S 770590 registered?
Mode-S code 770590 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 770590 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 07:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 770590, octal 35602620, decimal 7,800,208.
What flights does 770590 operate?
Mode-S 770590 has broadcast 20 distinct callsigns, including ALK503, ALK504, ALK501, ALK604, ALK605.