Apparatus

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sensors Mode-S transponder

7705C2

ICAO 24-bit transponder address · allocated to Sri Lanka

Currently assigned to 4R-ANB · AIRBUS A-320neo

Hex
7705C2
Octal
35602702
Decimal
7,800,258
Country
LK
Tail
4R-ANB
Type
A20N
No current signal · last broadcast 2h ago
Flights observed
110
Distinct callsigns
20
Country
LK
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7705C2.

Country allocation

The ICAO 24-bit address 7705C2 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
ALK181 SriLankan Airlines 15 2026-05-14
ALK182 SriLankan Airlines 13 2026-05-14
ALK306 SriLankan Airlines 7 2026-05-27
ALK404 SriLankan Airlines 5 2026-05-23
ALK884 SriLankan Airlines 4 2026-05-28
ALK880 SriLankan Airlines 4 2026-05-05
ALK318 SriLankan Airlines 4 2026-05-29
ALK307 SriLankan Airlines 4 2026-05-28
ALK195 SriLankan Airlines 4 2026-05-24
ALK144 SriLankan Airlines 4 2026-05-22
ALK143 SriLankan Airlines 4 2026-05-22
ALK885 SriLankan Airlines 3 2026-05-28
ALK405 SriLankan Airlines 3 2026-05-09
ALK402 SriLankan Airlines 3 2026-05-17
ALK196 SriLankan Airlines 3 2026-05-24
ALK403 SriLankan Airlines 2 2026-05-17
ALK364 SriLankan Airlines 2 2026-05-15
ALK168 SriLankan Airlines 2 2026-05-29
ALK167 SriLankan Airlines 2 2026-05-29
ALK162 SriLankan Airlines 2 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 ALK319 KUL → CMB May 30, 01:05 UTCMay 30, 01:30 UTC25m
2026-05-29 ALK318 CMB → KUL May 29, 22:30 UTCMay 29, 23:05 UTC35m
2026-05-29 ALK168 COK → CMB May 29, 10:45 UTCMay 29, 11:20 UTC35m
2026-05-29 ALK167 CMB → COK May 29, 09:05 UTCMay 29, 09:25 UTC20m
2026-05-28 ALK885 CAN → CMB May 28, 20:40 UTCMay 28, 22:40 UTC2h 0m
2026-05-28 ALK884 CMB → CAN May 28, 17:50 UTCMay 28, 18:05 UTC15m
2026-05-28 ALK307 SIN → CMB May 28, 02:15 UTCMay 28, 17:15 UTC15h 0m
2026-05-27 ALK306 CMB → SIN May 27, 08:35 UTCMay 28, 00:00 UTC15h 25m
2026-05-27 ALK306 CMB → SIN May 27, 02:34 UTCMay 28, 00:00 UTC21h 26m
2026-05-27 ALK307 SIN → CMB May 27, 02:19 UTCMay 28, 00:00 UTC21h 41m
2026-05-26 ALK306 CMB → SIN May 26, 23:19 UTCMay 27, 00:14 UTC55m
2026-05-26 ALK306 CMB → SIN May 26, 01:14 UTCMay 27, 00:14 UTC23h 0m
2026-05-25 ALK318 CMB → KUL May 25, 07:35 UTCMay 25, 23:30 UTC15h 54m
2026-05-24 ALK196 DEL → CMB May 24, 13:35 UTCMay 25, 05:30 UTC15h 55m
2026-05-24 ALK195 CMB → DEL May 24, 01:15 UTCMay 24, 12:10 UTC10h 55m
2026-05-23 ALK318 CMB → KUL May 23, 07:20 UTCMay 23, 23:15 UTC15h 56m
2026-05-23 ALK404 CMB → BKK May 23, 05:05 UTCMay 23, 05:40 UTC35m
2026-05-22 ALK144 BOM → CMB May 22, 16:40 UTCMay 22, 17:40 UTC1h 0m
2026-05-22 ALK144 BOM → CMB May 22, 15:55 UTCMay 22, 16:05 UTC10m
2026-05-22 ALK143 CMB → BOM May 22, 13:50 UTCMay 22, 14:25 UTC35m
2026-05-22 ALK143 CMB → BOM May 22, 07:35 UTCMay 22, 13:15 UTC5h 40m
2026-05-22 ALK404 CMB → BKK May 22, 05:25 UTCMay 22, 05:55 UTC30m
2026-05-21 ALK184 KHI → CMB May 21, 13:30 UTCMay 21, 16:01 UTC2h 30m
2026-05-21 ALK183 CMB → KHI May 21, 01:00 UTCMay 21, 11:25 UTC10h 25m
2026-05-20 ALK318 CMB → KUL May 20, 09:15 UTCMay 20, 23:05 UTC13h 50m
2026-05-19 ALK309 SIN → CMB May 19, 12:40 UTCMay 20, 05:35 UTC16h 56m
2026-05-19 ALK308 CMB → SIN May 19, 01:10 UTCMay 19, 10:35 UTC9h 25m
2026-05-18 ALK196 DEL → CMB May 18, 13:35 UTCMay 18, 23:10 UTC9h 34m
2026-05-18 ALK195 CMB → DEL May 18, 00:50 UTCMay 18, 12:00 UTC11h 10m
2026-05-17 ALK402 CMB → BKK May 17, 22:25 UTCMay 17, 23:20 UTC55m
2026-05-17 ALK403 BKK → CMB May 17, 01:00 UTCMay 17, 01:15 UTC15m
2026-05-16 ALK402 CMB → BKK May 16, 14:05 UTCMay 16, 23:00 UTC8h 55m
2026-05-16 ALK365 CGK → CMB May 16, 08:01 UTCMay 16, 08:16 UTC15m
2026-05-15 ALK364 CMB → CGK May 15, 11:25 UTCMay 16, 05:46 UTC18h 20m
2026-05-15 ALK364 CMB → CGK May 15, 08:45 UTCMay 16, 05:46 UTC21h 0m
2026-05-15 ALK162 TRV → CMB May 15, 04:50 UTCMay 15, 05:15 UTC25m
2026-05-15 ALK161 CMB → TRV May 15, 03:05 UTCMay 15, 03:35 UTC30m
2026-05-14 ALK885 CAN → CMB May 14, 21:40 UTCMay 14, 22:40 UTC1h 0m
2026-05-14 ALK885 CAN → CMB May 14, 20:15 UTCMay 14, 20:25 UTC10m
2026-05-14 ALK884 CMB → CAN May 14, 17:25 UTCMay 14, 17:35 UTC10m
2026-05-14 ALK182 KTM → CMB May 14, 07:50 UTCMay 14, 15:55 UTC8h 5m
2026-05-14 ALK181 CMB → KTM May 14, 04:40 UTCMay 14, 06:15 UTC1h 35m
2026-05-13 ALK181 CMB → KTM May 13, 08:35 UTCMay 14, 06:15 UTC21h 40m
2026-05-13 ALK182 KTM → CMB May 13, 08:25 UTCMay 14, 06:15 UTC21h 50m
2026-05-12 ALK181 CMB → KTM May 12, 16:00 UTCMay 13, 06:35 UTC14h 35m
2026-05-12 ALK123 CMB → MAA May 12, 13:45 UTCMay 12, 14:05 UTC20m
2026-05-12 ALK162 TRV → CMB May 12, 07:00 UTCMay 12, 07:20 UTC20m
2026-05-12 ALK161 CMB → TRV May 12, 02:55 UTCMay 12, 03:15 UTC20m
2026-05-11 ALK217 CMB → DOH May 11, 13:50 UTCMay 11, 18:35 UTC4h 46m
2026-05-11 ALK182 KTM → CMB May 11, 08:10 UTCMay 11, 10:35 UTC2h 25m

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

Mode-S 7705C2 frequently asked

What is Mode-S code 7705C2?
7705C2 is an ICAO 24-bit transponder address. Allocated to Sri Lanka. Assigned to 4R-ANB.
Where is Mode-S 7705C2 registered?
Mode-S code 7705C2 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 7705C2 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7705C2, octal 35602702, decimal 7,800,258.
What flights does 7705C2 operate?
Mode-S 7705C2 has broadcast 20 distinct callsigns, including ALK181, ALK182, ALK306, ALK404, ALK884.