Apparatus

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sensors Mode-S transponder

77058D

ICAO 24-bit transponder address · allocated to Sri Lanka

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

Hex
77058D
Octal
35602615
Decimal
7,800,205
Country
LK
Tail
4R-ALM
Type
A333
Broadcasting now · callsign ALK605 · 3,325 ft
Flights observed
241
Distinct callsigns
20
Country
LK
Last broadcast
Jul 26, 21:15 UTC

Current position

77058D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 77058D 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
ALK604 SriLankan Airlines 45 2026-07-23
ALK606 SriLankan Airlines 24 2026-07-24
ALK455 - 23 2026-07-07
ALK605 SriLankan Airlines 22 2026-07-24
ALK454 - 19 2026-07-06
ALK607 SriLankan Airlines 10 2026-07-25
ALK26L SriLankan Airlines 10 2026-07-19
ALK89L - 9 2026-07-13
ALK308 - 8 2026-07-16
ALK90L - 6 2026-07-13
ALK471 SriLankan Airlines 6 2026-06-03
ALK142 - 6 2026-06-18
ALK600 SriLankan Airlines 4 2026-05-31
ALK558 - 4 2026-07-17
ALK154 - 4 2026-06-29
ALK557 - 3 2026-07-16
ALK309 SriLankan Airlines 3 2026-05-30
ALK266 SriLankan Airlines 3 2026-04-30
ALK25L - 3 2026-07-18
ALK153 - 3 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ALK564 CDG → CMB Jul 26, 13:40 UTCJul 26, 21:15 UTC7h 35m
2026-07-25 ALK563 CMB → CDG Jul 25, 20:30 UTCJul 26, 07:00 UTC10h 31m
2026-07-25 ALK607 SYD → CMB Jul 25, 06:20 UTCJul 25, 08:10 UTC1h 50m
2026-07-24 ALK606 CMB → SYD Jul 24, 09:35 UTCJul 25, 04:20 UTC18h 45m
2026-07-24 ALK605 MEL → CMB Jul 24, 07:20 UTCJul 25, 04:20 UTC21h 0m
2026-07-24 ALK605 MEL → CMB Jul 24, 06:40 UTCJul 25, 04:20 UTC21h 40m
2026-07-23 ALK604 CMB → MEL Jul 23, 09:20 UTCJul 24, 04:15 UTC18h 55m
2026-07-23 ALK604 CMB → MEL Jul 23, 07:20 UTCJul 24, 04:15 UTC20h 55m
2026-07-23 ALK605 MEL → CMB Jul 23, 06:20 UTCJul 24, 04:15 UTC21h 55m
2026-07-22 ALK604 CMB → MEL Jul 22, 10:20 UTCJul 23, 04:05 UTC17h 45m
2026-07-21 ALK604 CMB → MEL Jul 21, 10:25 UTCJul 22, 04:35 UTC18h 10m
2026-07-21 ALK607 SYD → CMB Jul 21, 07:20 UTCJul 22, 04:35 UTC21h 15m
2026-07-21 ALK607 SYD → CMB Jul 21, 06:50 UTCJul 22, 04:35 UTC21h 45m
2026-07-20 ALK606 CMB → SYD Jul 20, 14:05 UTCJul 21, 04:30 UTC14h 24m
2026-07-19 ALK26L DXB → CMB Jul 19, 19:25 UTCJul 19, 23:10 UTC3h 45m
2026-07-18 ALK25L - Jul 18, 23:20 UTCJul 19, 17:35 UTC18h 15m
2026-07-18 ALK504 LHR → CMB Jul 18, 21:20 UTCJul 19, 17:35 UTC20h 15m
2026-07-18 ALK504 LHR → CMB Jul 18, 20:50 UTCJul 19, 17:35 UTC20h 45m
2026-07-18 ALK503 - Jul 18, 08:05 UTCJul 18, 08:30 UTC25m
2026-07-17 ALK558 - Jul 17, 15:05 UTCJul 18, 00:00 UTC8h 55m
2026-07-16 ALK557 - Jul 16, 12:40 UTCJul 17, 06:10 UTC17h 30m
2026-07-16 ALK308 - Jul 16, 09:55 UTCJul 16, 10:50 UTC55m
2026-07-15 ALK564 - Jul 15, 13:40 UTCJul 15, 23:00 UTC9h 20m
2026-07-15 ALK563 - Jul 15, 02:45 UTCJul 15, 09:40 UTC6h 55m
2026-07-14 ALK605 - Jul 14, 07:20 UTCJul 15, 02:40 UTC19h 19m
2026-07-14 ALK605 - Jul 14, 06:30 UTCJul 15, 02:40 UTC20h 9m
2026-07-13 ALK604 - Jul 13, 13:55 UTCJul 14, 04:10 UTC14h 15m
2026-07-13 ALK90L - Jul 13, 07:50 UTCJul 14, 04:10 UTC20h 20m
2026-07-13 ALK89L - Jul 13, 04:10 UTCJul 13, 05:40 UTC1h 30m
2026-07-12 ALK89L - Jul 12, 06:25 UTCJul 13, 05:15 UTC22h 50m
2026-07-12 ALK606 - Jul 12, 03:01 UTCJul 12, 04:30 UTC1h 30m
2026-07-11 ALK606 - Jul 11, 07:20 UTCJul 12, 04:30 UTC21h 10m
2026-07-11 ALK605 - Jul 11, 06:30 UTCJul 12, 03:15 UTC20h 45m
2026-07-11 ALK604 - Jul 11, 03:25 UTCJul 11, 04:40 UTC1h 15m
2026-07-10 ALK607 - Jul 10, 06:25 UTCJul 10, 07:00 UTC35m
2026-07-10 ALK606 - Jul 10, 00:50 UTCJul 10, 04:40 UTC3h 50m
2026-07-09 ALK606 - Jul 9, 07:20 UTCJul 10, 04:40 UTC21h 20m
2026-07-09 ALK605 MEL → SYD Jul 9, 06:35 UTCJul 10, 04:40 UTC22h 5m
2026-07-09 ALK604 - Jul 9, 01:15 UTCJul 9, 04:40 UTC3h 25m
2026-07-08 ALK604 - Jul 8, 07:20 UTCJul 9, 04:40 UTC21h 20m
2026-07-08 ALK604 MEL → MEL Jul 8, 06:25 UTCJul 9, 04:40 UTC22h 15m
2026-07-07 ALK604 - Jul 7, 09:20 UTCJul 8, 04:40 UTC19h 20m
2026-07-07 ALK455 - Jul 7, 07:55 UTCJul 8, 04:40 UTC20h 45m
2026-07-07 ALK455 - Jul 7, 05:20 UTCJul 8, 04:40 UTC23h 20m
2026-07-07 ALK455 - Jul 7, 02:45 UTCJul 7, 16:50 UTC14h 5m
2026-07-06 ALK454 - Jul 6, 07:55 UTCJul 7, 00:15 UTC16h 20m
2026-07-05 ALK558 - Jul 5, 14:25 UTCJul 6, 05:10 UTC14h 45m
2026-07-04 ALK557 - Jul 4, 19:25 UTCJul 5, 05:35 UTC10h 10m
2026-07-04 ALK605 - Jul 4, 07:00 UTCJul 4, 08:15 UTC1h 15m
2026-07-04 ALK604 - Jul 4, 03:45 UTCJul 4, 05:00 UTC1h 15m

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

Mode-S 77058D frequently asked

What is Mode-S code 77058D?
77058D is an ICAO 24-bit transponder address. Allocated to Sri Lanka. Assigned to 4R-ALM.
Where is Mode-S 77058D registered?
Mode-S code 77058D 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 77058D broadcasting right now?
Yes. Mode-S 77058D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 77058D, octal 35602615, decimal 7,800,205.
What flights does 77058D operate?
Mode-S 77058D has broadcast 20 distinct callsigns, including ALK604, ALK606, ALK455, ALK605, ALK454.