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sensors Mode-S transponder

739603

ICAO 24-bit transponder address · allocated to Israel

Currently assigned to 4X-IHD · ATR-72-600

Hex
739603
Octal
34713003
Decimal
7,575,043
Country
IL
Tail
4X-IHD
Type
AT76
Broadcasting now · callsign HFA603 · 13,150 ft
Flights observed
306
Distinct callsigns
20
Country
IL
Last broadcast
15h ago

Current position

739603 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 739603 falls within the block assigned to Israel (IL) by ICAO Annex 10, Volume III. Every aircraft registered in Israel 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
HFA850 - 20 2026-07-13
HFA849 - 19 2026-07-13
HFA721 - 19 2026-07-12
HFA722 - 16 2026-07-12
HFA703 - 15 2026-07-09
HFA604 - 15 2026-07-11
HFA852 - 14 2026-07-13
HFA851 - 14 2026-07-13
HFA704 - 14 2026-07-09
HFA603 - 12 2026-07-11
HFA602 - 9 2026-06-22
HFA601 - 9 2026-06-22
HFA606 - 8 2026-07-11
HFA605 - 8 2026-07-11
HFA808 - 7 2026-06-12
HFA807 - 6 2026-06-12
HFA732 - 6 2026-07-08
HFA731 - 6 2026-07-08
HFA856 - 5 2026-06-07
HFA855 - 5 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 HFA752 AOK → HFA Jul 13, 15:50 UTCJul 13, 17:40 UTC1h 50m
2026-07-13 HFA751 - Jul 13, 13:15 UTCJul 13, 14:50 UTC1h 35m
2026-07-13 HFA852 - Jul 13, 10:55 UTCJul 13, 11:50 UTC55m
2026-07-13 HFA851 - Jul 13, 09:15 UTCJul 13, 10:05 UTC50m
2026-07-13 HFA850 - Jul 13, 07:25 UTCJul 13, 08:15 UTC50m
2026-07-13 HFA849 - Jul 13, 05:40 UTCJul 13, 06:30 UTC50m
2026-07-12 HFA722 RHO → HFA Jul 12, 16:20 UTCJul 12, 18:15 UTC1h 55m
2026-07-12 HFA721 - Jul 12, 13:15 UTCJul 12, 15:01 UTC1h 45m
2026-07-12 HFA852 - Jul 12, 11:20 UTCJul 12, 12:05 UTC45m
2026-07-12 HFA851 - Jul 12, 09:20 UTCJul 12, 10:10 UTC50m
2026-07-12 HFA850 - Jul 12, 07:35 UTCJul 12, 08:30 UTC55m
2026-07-12 HFA849 HFA → PFO Jul 12, 05:50 UTCJul 12, 06:40 UTC50m
2026-07-11 HFA606 - Jul 11, 16:25 UTCJul 11, 17:10 UTC45m
2026-07-11 HFA605 - Jul 11, 14:25 UTCJul 11, 15:10 UTC45m
2026-07-11 HFA604 - Jul 11, 12:50 UTCJul 11, 13:30 UTC40m
2026-07-11 HFA603 - Jul 11, 10:35 UTCJul 11, 11:15 UTC40m
2026-07-10 HFA702 ATH → HFA Jul 10, 10:55 UTCJul 10, 13:30 UTC2h 35m
2026-07-10 HFA701 - Jul 10, 06:10 UTCJul 10, 08:55 UTC2h 45m
2026-07-09 HFA704 ATH → HFA Jul 9, 16:15 UTCJul 9, 18:40 UTC2h 25m
2026-07-09 HFA703 HFA → ATH Jul 9, 12:20 UTCJul 9, 15:05 UTC2h 45m
2026-07-09 HFA604 - Jul 9, 10:25 UTCJul 9, 11:05 UTC40m
2026-07-09 HFA603 - Jul 9, 08:20 UTCJul 9, 09:05 UTC45m
2026-07-08 HFA732 - Jul 8, 14:25 UTCJul 8, 15:55 UTC1h 30m
2026-07-08 HFA731 - Jul 8, 10:25 UTCJul 8, 11:55 UTC1h 30m
2026-07-07 HFA812 - Jul 7, 15:55 UTCJul 7, 16:35 UTC40m
2026-07-07 HFA811 - Jul 7, 14:05 UTCJul 7, 14:50 UTC45m
2026-07-07 HFA606 - Jul 7, 12:35 UTCJul 7, 13:15 UTC40m
2026-07-07 HFA605 - Jul 7, 10:45 UTCJul 7, 11:25 UTC40m
2026-07-06 HFA742 JMK → HFA Jul 6, 11:15 UTCJul 6, 13:30 UTC2h 15m
2026-07-06 HFA741 - Jul 6, 07:40 UTCJul 6, 10:00 UTC2h 20m
2026-07-05 HFA722 - Jul 5, 17:15 UTCJul 5, 17:45 UTC30m
2026-07-05 HFA722 - Jul 5, 16:00 UTCJul 5, 17:10 UTC1h 10m
2026-07-05 HFA721 HFA → RHO Jul 5, 13:05 UTCJul 5, 14:55 UTC1h 50m
2026-07-05 HFA852 - Jul 5, 11:15 UTCJul 5, 12:10 UTC55m
2026-07-05 HFA851 - Jul 5, 09:30 UTCJul 5, 10:15 UTC45m
2026-07-05 HFA850 - Jul 5, 07:45 UTCJul 5, 08:35 UTC50m
2026-07-05 HFA849 - Jul 5, 05:50 UTCJul 5, 06:40 UTC50m
2026-07-04 HFA606 - Jul 4, 16:25 UTCJul 4, 17:05 UTC40m
2026-07-04 HFA605 - Jul 4, 14:15 UTCJul 4, 15:00 UTC45m
2026-07-04 HFA604 - Jul 4, 12:50 UTCJul 4, 13:35 UTC45m
2026-07-04 HFA603 - Jul 4, 10:45 UTCJul 4, 11:25 UTC40m
2026-07-03 HFA702 ATH → HFA Jul 3, 08:50 UTCJul 3, 11:15 UTC2h 25m
2026-07-03 HFA701 - Jul 3, 04:55 UTCJul 3, 07:50 UTC2h 55m
2026-07-02 HFA722 RHO → HFA Jul 2, 16:10 UTCJul 2, 17:50 UTC1h 40m
2026-07-02 HFA721 - Jul 2, 13:15 UTCJul 2, 15:05 UTC1h 50m
2026-07-02 HFA852 - Jul 2, 10:55 UTCJul 2, 11:45 UTC50m
2026-07-02 HFA851 - Jul 2, 09:05 UTCJul 2, 09:55 UTC50m
2026-07-02 HFA850 - Jul 2, 07:10 UTCJul 2, 08:05 UTC55m
2026-07-02 HFA849 - Jul 2, 05:35 UTCJul 2, 06:25 UTC50m
2026-07-01 HFA704 ATH → HFA Jul 1, 16:00 UTCJul 1, 18:30 UTC2h 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 4X-IHD page for operator, model, and routing details .

Mode-S 739603 frequently asked

What is Mode-S code 739603?
739603 is an ICAO 24-bit transponder address. Allocated to Israel. Assigned to 4X-IHD.
Where is Mode-S 739603 registered?
Mode-S code 739603 is allocated to Israel (IL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 739603 broadcasting right now?
Yes. Mode-S 739603 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 739603, octal 34713003, decimal 7,575,043.
What flights does 739603 operate?
Mode-S 739603 has broadcast 20 distinct callsigns, including HFA850, HFA849, HFA721, HFA722, HFA703.