Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

7705C1

ICAO 24-bit transponder address · allocated to Sri Lanka

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

Hex
7705C1
Octal
35602701
Decimal
7,800,257
Country
LK
Tail
4R-ANA
Type
A20N
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
261
Distinct callsigns
20
Country
LK
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 7705C1.

Country allocation

The ICAO 24-bit address 7705C1 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
ALK182 - 28 2026-07-16
ALK884 SriLankan Airlines 27 2026-07-16
ALK181 - 23 2026-07-15
ALK885 - 17 2026-07-11
ALK144 - 13 2026-07-25
ALK143 SriLankan Airlines 13 2026-07-25
ALK880 SriLankan Airlines 11 2026-07-07
ALK195 SriLankan Airlines 11 2026-07-26
ALK196 - 10 2026-07-10
ALK314 SriLankan Airlines 7 2026-07-24
ALK218 - 6 2026-07-13
ALK881 - 5 2026-07-07
ALK318 SriLankan Airlines 5 2026-07-23
ALK306 SriLankan Airlines 5 2026-07-25
ALK405 SriLankan Airlines 4 2026-07-21
ALK404 SriLankan Airlines 4 2026-07-21
ALK365 - 4 2026-07-01
ALK364 - 4 2026-06-26
ALK315 - 4 2026-06-22
ALK307 SriLankan Airlines 4 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ALK142 BOM → CMB Jul 26, 21:40 UTCJul 26, 22:15 UTC35m
2026-07-26 ALK141 CMB → BOM Jul 26, 13:25 UTCJul 26, 20:25 UTC7h 0m
2026-07-26 ALK195 CMB → DEL Jul 26, 02:20 UTCJul 26, 11:55 UTC9h 36m
2026-07-25 ALK306 CMB → SIN Jul 25, 23:25 UTCJul 26, 00:20 UTC55m
2026-07-25 ALK144 - Jul 25, 15:40 UTCJul 25, 17:30 UTC1h 50m
2026-07-25 ALK143 CMB → BOM Jul 25, 07:25 UTCJul 25, 14:20 UTC6h 55m
2026-07-24 ALK314 CMB → KUL Jul 24, 12:40 UTCJul 25, 05:55 UTC17h 15m
2026-07-24 ALK308 CMB → SIN Jul 24, 01:00 UTCJul 24, 10:50 UTC9h 50m
2026-07-23 ALK318 CMB → KUL Jul 23, 13:20 UTCJul 23, 22:55 UTC9h 35m
2026-07-23 ALK307 SIN → CMB Jul 23, 02:20 UTCJul 23, 22:55 UTC20h 35m
2026-07-23 ALK307 SIN → CMB Jul 23, 02:10 UTCJul 23, 22:55 UTC20h 45m
2026-07-22 ALK306 CMB → SIN Jul 22, 12:45 UTCJul 23, 00:25 UTC11h 40m
2026-07-22 ALK403 BKK → CMB Jul 22, 01:15 UTCJul 22, 10:25 UTC9h 10m
2026-07-21 ALK402 CMB → BKK Jul 21, 22:40 UTCJul 21, 23:15 UTC35m
2026-07-21 ALK144 - Jul 21, 15:55 UTCJul 21, 17:40 UTC1h 45m
2026-07-21 ALK405 BKK → CMB Jul 21, 07:30 UTCJul 21, 14:20 UTC6h 50m
2026-07-21 ALK404 CMB → BKK Jul 21, 05:05 UTCJul 21, 05:30 UTC25m
2026-07-20 ALK144 - Jul 20, 16:05 UTCJul 20, 17:55 UTC1h 50m
2026-07-20 ALK143 CMB → BOM Jul 20, 14:00 UTCJul 20, 14:35 UTC35m
2026-07-20 ALK143 CMB → BOM Jul 20, 07:35 UTCJul 20, 13:40 UTC6h 5m
2026-07-20 ALK314 CMB → KUL Jul 20, 05:30 UTCJul 20, 05:55 UTC25m
2026-07-19 ALK142 BOM → CMB Jul 19, 21:50 UTCJul 19, 23:40 UTC1h 50m
2026-07-19 ALK141 CMB → BOM Jul 19, 18:40 UTCJul 19, 20:20 UTC1h 40m
2026-07-19 ALK307 SIN → CMB Jul 19, 02:10 UTCJul 19, 02:45 UTC35m
2026-07-18 ALK306 CMB → SIN Jul 18, 23:15 UTCJul 19, 00:10 UTC55m
2026-07-18 ALK306 CMB → SIN Jul 18, 01:05 UTCJul 19, 00:10 UTC23h 6m
2026-07-17 ALK90L - Jul 17, 07:14 UTCJul 17, 23:00 UTC15h 45m
2026-07-16 ALK89L - Jul 16, 21:30 UTCJul 17, 05:20 UTC7h 50m
2026-07-16 - - Jul 16, 19:35 UTCJul 16, 19:50 UTC15m
2026-07-16 ALK884 CMB → CAN Jul 16, 17:14 UTCJul 16, 17:30 UTC15m
2026-07-16 ALK182 - Jul 16, 07:40 UTCJul 16, 15:14 UTC7h 35m
2026-07-15 ALK181 - Jul 15, 13:55 UTCJul 16, 06:10 UTC16h 15m
2026-07-14 ALK144 - Jul 14, 16:20 UTCJul 15, 14:05 UTC21h 44m
2026-07-14 ALK144 - Jul 14, 15:20 UTCJul 15, 14:05 UTC22h 44m
2026-07-14 ALK143 CMB → BOM Jul 14, 12:05 UTCJul 14, 13:50 UTC1h 45m
2026-07-14 ALK405 - Jul 14, 07:30 UTCJul 14, 08:45 UTC1h 15m
2026-07-14 ALK404 - Jul 14, 05:05 UTCJul 14, 05:30 UTC25m
2026-07-13 ALK218 - Jul 13, 19:35 UTCJul 14, 00:00 UTC4h 25m
2026-07-13 ALK182 - Jul 13, 08:10 UTCJul 13, 17:40 UTC9h 30m
2026-07-12 ALK218 - Jul 12, 19:40 UTCJul 13, 06:10 UTC10h 30m
2026-07-12 ALK182 - Jul 12, 07:50 UTCJul 12, 17:30 UTC9h 40m
2026-07-11 ALK885 - Jul 11, 20:00 UTCJul 12, 06:10 UTC10h 10m
2026-07-11 ALK884 CMB → CAN Jul 11, 17:50 UTCJul 11, 18:05 UTC15m
2026-07-11 ALK884 CMB → CAN Jul 11, 15:40 UTCJul 11, 15:55 UTC15m
2026-07-11 ALK319 - Jul 11, 01:00 UTCJul 11, 01:25 UTC25m
2026-07-10 ALK196 - Jul 10, 13:30 UTCJul 10, 23:05 UTC9h 36m
2026-07-10 ALK195 - Jul 10, 01:20 UTCJul 10, 11:50 UTC10h 30m
2026-07-09 ALK196 - Jul 9, 13:35 UTCJul 9, 22:55 UTC9h 20m
2026-07-09 ALK403 - Jul 9, 00:55 UTCJul 9, 12:00 UTC11h 5m
2026-07-08 ALK182 - Jul 8, 08:35 UTCJul 8, 23:05 UTC14h 30m

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

Mode-S 7705C1 frequently asked

What is Mode-S code 7705C1?
7705C1 is an ICAO 24-bit transponder address. Allocated to Sri Lanka. Assigned to 4R-ANA.
Where is Mode-S 7705C1 registered?
Mode-S code 7705C1 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 7705C1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7705C1, octal 35602701, decimal 7,800,257.
What flights does 7705C1 operate?
Mode-S 7705C1 has broadcast 20 distinct callsigns, including ALK182, ALK884, ALK181, ALK885, ALK144.