Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

501C55

ICAO 24-bit transponder address · allocated to Croatia

Currently assigned to 9A-BTM · AIRBUS A-320

Hex
501C55
Octal
24016125
Decimal
5,250,133
Country
HR
Tail
9A-BTM
Type
A320
Broadcasting now · callsign ISR885 · 34,525 ft
Flights observed
181
Distinct callsigns
20
Country
HR
Last broadcast
2h ago

Current position

501C55 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 501C55 falls within the block assigned to Croatia (HR) by ICAO Annex 10, Volume III. Every aircraft registered in Croatia 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
ISR724 - 9 2026-06-23
ISR562 Israir Airlines 9 2026-06-23
ISR561 Israir Airlines 9 2026-06-23
ISR501 - 9 2026-06-24
ISR723 Israir Airlines 7 2026-06-23
ISR502 - 7 2026-06-11
ISR886 - 6 2026-06-21
ISR885 - 6 2026-06-21
ISR568 Israir Airlines 5 2026-06-06
ISR516 Israir Airlines 4 2026-06-21
ISR515 Israir Airlines 4 2026-06-21
ISR348 Israir Airlines 4 2026-06-08
ISR347 Israir Airlines 4 2026-06-08
ISR596 Israir Airlines 3 2026-06-22
ISR595 Israir Airlines 3 2026-06-22
ISR588 Israir Airlines 3 2026-06-07
ISR587 Israir Airlines 3 2026-06-07
ISR582 Israir Airlines 3 2026-06-21
ISR581 Israir Airlines 3 2026-06-21
ISR567 Israir Airlines 3 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-24 ISR501 - Jun 24, 07:15 UTCJun 24, 11:09 UTC3h 55m
2026-06-23 ISR562 ATH → TLV Jun 23, 21:49 UTCJun 23, 23:19 UTC1h 30m
2026-06-23 ISR561 TLV → ATH Jun 23, 17:50 UTCJun 23, 19:34 UTC1h 45m
2026-06-23 ISR724 - Jun 23, 13:24 UTCJun 23, 16:14 UTC2h 50m
2026-06-23 ISR723 TLV → BUD Jun 23, 09:05 UTCJun 23, 12:05 UTC3h 0m
2026-06-22 ISR562 ATH → TLV Jun 22, 16:05 UTCJun 22, 17:44 UTC1h 40m
2026-06-22 ISR561 TLV → ATH Jun 22, 13:05 UTCJun 22, 14:55 UTC1h 50m
2026-06-22 ISR596 PFO → TLV Jun 22, 08:25 UTCJun 22, 09:00 UTC35m
2026-06-22 ISR595 TLV → PFO Jun 22, 06:29 UTCJun 22, 07:04 UTC35m
2026-06-21 ISR582 LCA → TLV Jun 21, 21:29 UTCJun 21, 22:10 UTC40m
2026-06-21 ISR581 TLV → LCA Jun 21, 19:39 UTCJun 21, 20:14 UTC35m
2026-06-21 ISR516 RHO → TLV Jun 21, 16:59 UTCJun 21, 18:14 UTC1h 15m
2026-06-21 ISR515 TLV → RHO Jun 21, 13:54 UTCJun 21, 15:05 UTC1h 10m
2026-06-21 ISR886 - Jun 21, 10:19 UTCJun 21, 12:24 UTC2h 5m
2026-06-21 ISR885 TLV → BUS Jun 21, 07:00 UTCJun 21, 08:40 UTC1h 40m
2026-06-20 ISR754 - Jun 20, 14:35 UTCJun 20, 17:39 UTC3h 5m
2026-06-20 ISR753 TLV → LJU Jun 20, 10:04 UTCJun 20, 13:09 UTC3h 5m
2026-06-19 ISR362 FCO → TLV Jun 19, 17:24 UTCJun 19, 19:49 UTC2h 25m
2026-06-19 ISR361 TLV → BRI Jun 19, 13:24 UTCJun 19, 16:04 UTC2h 40m
2026-06-19 ISR562 ATH → TLV Jun 19, 10:04 UTCJun 19, 11:39 UTC1h 35m
2026-06-19 ISR561 TLV → ATH Jun 19, 06:39 UTCJun 19, 08:29 UTC1h 50m
2026-06-18 ISR516 RHO → TLV Jun 18, 15:55 UTCJun 18, 17:15 UTC1h 20m
2026-06-18 ISR515 TLV → RHO Jun 18, 13:25 UTCJun 18, 14:40 UTC1h 15m
2026-06-18 ISR886 BUS → TLV Jun 18, 09:55 UTCJun 18, 12:05 UTC2h 10m
2026-06-18 ISR885 TLV → BUS Jun 18, 07:05 UTCJun 18, 08:45 UTC1h 40m
2026-06-17 ISR886 BUS → AMM Jun 17, 16:35 UTCJun 17, 18:40 UTC2h 5m
2026-06-17 ISR885 TLV → BUS Jun 17, 13:40 UTCJun 17, 15:25 UTC1h 45m
2026-06-17 ISR501 TLV → TLV Jun 17, 07:30 UTCJun 17, 11:30 UTC4h 0m
2026-06-16 ISR562 ATH → TLV Jun 16, 21:20 UTCJun 16, 23:00 UTC1h 40m
2026-06-16 ISR561 TLV → ATH Jun 16, 17:55 UTCJun 16, 19:40 UTC1h 45m
2026-06-16 ISR724 BUD → TLV Jun 16, 13:34 UTCJun 16, 16:30 UTC2h 55m
2026-06-16 ISR723 TLV → BUD Jun 16, 09:00 UTCJun 16, 12:00 UTC3h 0m
2026-06-15 ISR750 - Jun 15, 21:50 UTCJun 15, 23:54 UTC2h 5m
2026-06-15 ISR749 - Jun 15, 03:55 UTCJun 15, 06:00 UTC2h 5m
2026-06-14 ISR598 PFO → TLV Jun 14, 17:15 UTCJun 14, 17:50 UTC35m
2026-06-14 ISR597 TLV → PFO Jun 14, 15:25 UTCJun 14, 16:00 UTC35m
2026-06-14 ISR332 - Jun 14, 11:35 UTCJun 14, 14:05 UTC2h 30m
2026-06-14 ISR161 TLV → TIA Jun 14, 08:25 UTCJun 14, 09:25 UTC1h 0m
2026-06-14 ISR161 TLV → TIA Jun 14, 04:15 UTCJun 14, 06:35 UTC2h 20m
2026-06-13 ISR174 - Jun 13, 10:50 UTCJun 13, 13:10 UTC2h 20m
2026-06-13 ISR173 TLV → TIV Jun 13, 06:25 UTCJun 13, 08:45 UTC2h 20m
2026-06-12 ISR362 FCO → TLV Jun 12, 18:05 UTCJun 12, 20:25 UTC2h 20m
2026-06-12 ISR361 TLV → BRI Jun 12, 13:45 UTCJun 12, 16:30 UTC2h 45m
2026-06-12 ISR562 ATH → TLV Jun 12, 10:10 UTCJun 12, 11:45 UTC1h 35m
2026-06-12 ISR561 TLV → ATH Jun 12, 06:45 UTCJun 12, 08:30 UTC1h 45m
2026-06-11 ISR164 - Jun 11, 22:35 UTCJun 12, 01:15 UTC2h 41m
2026-06-11 ISR163 - Jun 11, 17:55 UTCJun 11, 20:10 UTC2h 15m
2026-06-11 ISR502 - Jun 11, 15:25 UTCJun 11, 17:05 UTC1h 40m
2026-06-11 ISR501 - Jun 11, 12:40 UTCJun 11, 13:50 UTC1h 10m
2026-06-11 ISR520 RHO → TLV Jun 11, 09:10 UTCJun 11, 10:25 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 9A-BTM page for operator, model, and routing details .

Mode-S 501C55 frequently asked

What is Mode-S code 501C55?
501C55 is an ICAO 24-bit transponder address. Allocated to Croatia. Assigned to 9A-BTM.
Where is Mode-S 501C55 registered?
Mode-S code 501C55 is allocated to Croatia (HR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 501C55 broadcasting right now?
Yes. Mode-S 501C55 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 501C55, octal 24016125, decimal 5,250,133.
What flights does 501C55 operate?
Mode-S 501C55 has broadcast 20 distinct callsigns, including ISR724, ISR562, ISR561, ISR501, ISR723.