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 1h ago
Flights observed
132
Distinct callsigns
20
Country
LK
Last broadcast
1h 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
ALK141 - 11 2026-06-21
ALK195 SriLankan Airlines 7 2026-06-12
ALK142 - 7 2026-06-21
ALK403 - 5 2026-07-10
ALK402 - 5 2026-07-06
ALK144 - 5 2026-07-04
ALK404 - 4 2026-06-28
ALK319 - 4 2026-07-14
ALK318 - 4 2026-07-13
ALK306 - 4 2026-07-12
ALK196 SriLankan Airlines 4 2026-06-05
ALK191 SriLankan Airlines 4 2026-04-24
ALK151 SriLankan Airlines 4 2026-06-12
ALK143 SriLankan Airlines 4 2026-07-04
ALK1173 - 4 2026-07-10
ALK314 - 3 2026-06-21
ALK307 - 3 2026-07-13
ALK192 - 3 2026-06-27
ALK172 SriLankan Airlines 3 2026-06-15
ALK171 SriLankan Airlines 3 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ALK319 - Jul 14, 01:05 UTCJul 14, 01:30 UTC25m
2026-07-13 ALK318 - Jul 13, 15:55 UTCJul 13, 22:55 UTC7h 0m
2026-07-13 ALK307 - Jul 13, 02:05 UTCJul 13, 14:35 UTC12h 30m
2026-07-12 ALK306 - Jul 12, 10:50 UTCJul 13, 00:20 UTC13h 30m
2026-07-12 ALK319 - Jul 12, 00:55 UTCJul 12, 23:30 UTC22h 35m
2026-07-11 ALK318 - Jul 11, 04:50 UTCJul 11, 22:55 UTC18h 5m
2026-07-10 ALK1173 - Jul 10, 08:55 UTCJul 11, 03:20 UTC18h 25m
2026-07-10 ALK1173 - Jul 10, 06:10 UTCJul 11, 03:20 UTC21h 10m
2026-07-10 ALK403 - Jul 10, 01:00 UTCJul 10, 09:05 UTC8h 5m
2026-07-09 ALK166 - Jul 9, 04:40 UTCJul 9, 22:55 UTC18h 15m
2026-07-09 ALK165 - Jul 9, 03:00 UTCJul 9, 03:30 UTC30m
2026-07-08 ALK165 - Jul 8, 05:55 UTCJul 9, 03:30 UTC21h 35m
2026-07-07 ALK186 - Jul 7, 16:25 UTCJul 8, 06:05 UTC13h 40m
2026-07-07 ALK403 - Jul 7, 00:50 UTCJul 7, 15:00 UTC14h 10m
2026-07-06 ALK402 - Jul 6, 22:40 UTCJul 6, 23:10 UTC30m
2026-07-06 ALK168 - Jul 6, 10:45 UTCJul 6, 11:20 UTC35m
2026-07-06 ALK167 - Jul 6, 09:00 UTCJul 6, 09:30 UTC30m
2026-07-06 ALK307 - Jul 6, 02:05 UTCJul 6, 02:45 UTC40m
2026-07-05 ALK306 - Jul 5, 05:55 UTCJul 6, 00:15 UTC18h 20m
2026-07-05 ALK306 - Jul 5, 01:35 UTCJul 6, 00:15 UTC22h 40m
2026-07-05 ALK403 - Jul 5, 00:50 UTCJul 5, 23:30 UTC22h 40m
2026-07-04 ALK402 - Jul 4, 22:25 UTCJul 4, 23:00 UTC35m
2026-07-04 ALK144 - Jul 4, 16:35 UTCJul 4, 17:35 UTC1h 0m
2026-07-04 ALK144 - Jul 4, 15:50 UTCJul 4, 16:00 UTC10m
2026-07-04 ALK143 CMB → BOM Jul 4, 13:45 UTCJul 4, 14:15 UTC30m
2026-07-04 ALK143 CMB → BOM Jul 4, 05:05 UTCJul 4, 13:10 UTC8h 5m
2026-07-04 ALK1173 - Jul 4, 03:00 UTCJul 4, 03:40 UTC40m
2026-07-02 ALK319 - Jul 2, 01:00 UTCJul 2, 01:25 UTC25m
2026-07-01 ALK318 - Jul 1, 22:30 UTCJul 1, 22:55 UTC25m
2026-07-01 ALK232 - Jul 1, 17:40 UTCJul 1, 18:15 UTC35m
2026-07-01 ALK231 - Jul 1, 01:15 UTCJul 1, 12:25 UTC11h 10m
2026-06-30 ALK318 - Jun 30, 07:25 UTCJun 30, 23:15 UTC15h 50m
2026-06-30 ALK162 - Jun 30, 04:45 UTCJun 30, 05:10 UTC25m
2026-06-30 ALK161 - Jun 30, 03:10 UTCJun 30, 03:35 UTC25m
2026-06-29 ALK101 - Jun 29, 02:25 UTCJun 29, 08:54 UTC6h 30m
2026-06-28 ALK405 - Jun 28, 07:34 UTCJun 29, 05:09 UTC21h 35m
2026-06-28 ALK405 - Jun 28, 07:20 UTCJun 29, 05:09 UTC21h 50m
2026-06-28 ALK404 - Jun 28, 05:15 UTCJun 28, 05:55 UTC40m
2026-06-27 ALK192 - Jun 27, 00:14 UTCJun 27, 02:29 UTC2h 15m
2026-06-26 ALK90L DAC → DEL Jun 26, 07:14 UTCJun 26, 22:34 UTC15h 20m
2026-06-26 ALK89L - Jun 26, 04:00 UTCJun 26, 05:39 UTC1h 40m
2026-06-22 ALK103 CMB → MLE Jun 22, 13:49 UTCJun 23, 07:29 UTC17h 40m
2026-06-22 ALK168 - Jun 22, 11:00 UTCJun 22, 11:35 UTC35m
2026-06-22 ALK167 - Jun 22, 09:10 UTCJun 22, 09:45 UTC35m
2026-06-22 ALK162 - Jun 22, 04:34 UTCJun 22, 04:54 UTC20m
2026-06-22 ALK161 - Jun 22, 02:50 UTCJun 22, 03:14 UTC25m
2026-06-21 ALK142 - Jun 21, 23:24 UTCJun 22, 00:24 UTC1h 0m
2026-06-21 ALK141 - Jun 21, 20:34 UTCJun 21, 20:50 UTC15m
2026-06-21 ALK141 - Jun 21, 07:45 UTCJun 21, 19:55 UTC12h 10m
2026-06-21 ALK314 - Jun 21, 05:15 UTCJun 21, 05:54 UTC40m

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 1h 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 ALK141, ALK195, ALK142, ALK403, ALK402.