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sensors Mode-S transponder

4CA660

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-FPF · BOMBARDIER Regional Jet CRJ-900

Hex
4CA660
Octal
23123140
Decimal
5,023,328
Country
IE
Tail
EI-FPF
Type
CRJ9
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
649
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S 4CA660.

Country allocation

The ICAO 24-bit address 4CA660 falls within the block assigned to Ireland (IE) by ICAO Annex 10, Volume III. Every aircraft registered in Ireland 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
SAS84P - 11 2026-07-05
SAS1772 - 10 2026-07-04
SAS684 - 9 2026-07-10
SAS683 - 9 2026-07-10
SAS36F Scandinavian Airlines System 9 2026-07-23
SAS30U - 9 2026-07-23
SAS1790 Scandinavian Airlines System 9 2026-07-23
SAS1771 Scandinavian Airlines System 8 2026-07-24
SAS1643 Scandinavian Airlines System 8 2026-06-11
SAS1642 Scandinavian Airlines System 8 2026-06-11
SAS82T - 7 2026-07-04
SAS40L - 7 2026-07-15
SAS84B - 6 2026-07-24
SAS762 Scandinavian Airlines System 6 2026-06-15
SAS55N Scandinavian Airlines System 6 2026-06-15
SAS29Z - 6 2026-07-02
SAS2892 - 6 2026-07-05
SAS2026 Scandinavian Airlines System 6 2026-07-24
SAS1798 Scandinavian Airlines System 6 2026-05-29
SAS1797 Scandinavian Airlines System 6 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS1482 BGO → ARN Jul 26, 20:05 UTCJul 26, 21:10 UTC1h 5m
2026-07-26 SAS1481 ARN → BGO Jul 26, 18:20 UTCJul 26, 19:25 UTC1h 5m
2026-07-26 SAS1830 NCE → ARN Jul 26, 14:50 UTCJul 26, 17:25 UTC2h 35m
2026-07-26 SAS1829 ARN → NCE Jul 26, 10:30 UTCJul 26, 13:20 UTC2h 50m
2026-07-26 SAS57J KRN → ARN Jul 26, 08:05 UTCJul 26, 09:20 UTC1h 15m
2026-07-26 SAS62Y ARN → KRN Jul 26, 05:50 UTCJul 26, 07:00 UTC1h 11m
2026-07-25 SAS2694 BLQ → ARN Jul 25, 15:15 UTCJul 25, 17:30 UTC2h 15m
2026-07-25 SAS2693 ARN → BLQ Jul 25, 11:50 UTCJul 25, 14:10 UTC2h 20m
2026-07-25 SAS007 - Jul 25, 09:45 UTCJul 25, 10:45 UTC1h 0m
2026-07-25 SAS006 - Jul 25, 07:45 UTCJul 25, 08:40 UTC55m
2026-07-25 SAS864 OSL → ARN Jul 25, 06:05 UTCJul 25, 06:45 UTC40m
2026-07-25 SAS55P ARN → OSL Jul 25, 04:20 UTCJul 25, 05:00 UTC40m
2026-07-24 SAS1021 SFT → ARN Jul 24, 18:20 UTCJul 24, 19:10 UTC50m
2026-07-24 SAS59K CPH → CDG Jul 24, 16:45 UTCJul 24, 17:35 UTC50m
2026-07-24 SAS46D TRD → ARN Jul 24, 15:00 UTCJul 24, 15:50 UTC50m
2026-07-24 SAS47K ARN → TRD Jul 24, 13:10 UTCJul 24, 14:10 UTC1h 0m
2026-07-24 SAS84B - Jul 24, 11:20 UTCJul 24, 12:00 UTC40m
2026-07-24 SAS2026 ARN → UME Jul 24, 09:35 UTCJul 24, 10:15 UTC40m
2026-07-24 SAS81C SFT → ARN Jul 24, 07:55 UTCJul 24, 08:45 UTC50m
2026-07-24 SAS69N ARN → SFT Jul 24, 06:10 UTCJul 24, 07:05 UTC55m
2026-07-24 SAS1771 TLL → ARN Jul 24, 03:45 UTCJul 24, 04:25 UTC40m
2026-07-23 SAS1790 CPH → TLL Jul 23, 21:00 UTCJul 23, 22:20 UTC1h 20m
2026-07-23 SAS2752 WAW → CPH Jul 23, 18:00 UTCJul 23, 19:05 UTC1h 5m
2026-07-23 SAS2751 CPH → WAW Jul 23, 16:05 UTCJul 23, 17:05 UTC1h 0m
2026-07-23 SAS30U TLL → CPH Jul 23, 13:05 UTCJul 23, 14:20 UTC1h 15m
2026-07-23 SAS36F CPH → TLL Jul 23, 10:45 UTCJul 23, 12:00 UTC1h 15m
2026-07-23 SAS85J PRG → CPH Jul 23, 08:25 UTCJul 23, 09:30 UTC1h 5m
2026-07-23 SAS767 CPH → PRG Jul 23, 06:30 UTCJul 23, 07:25 UTC55m
2026-07-22 SAS1713 HEL → CPH Jul 22, 13:35 UTCJul 22, 15:05 UTC1h 30m
2026-07-22 SAS1712 - Jul 22, 11:10 UTCJul 22, 12:20 UTC1h 10m
2026-07-21 SAS42R - Jul 21, 13:15 UTCJul 21, 14:30 UTC1h 15m
2026-07-21 SAS87Y CPH → AMS Jul 21, 10:50 UTCJul 21, 11:55 UTC1h 5m
2026-07-21 SAS1694 VIE → CPH Jul 21, 08:30 UTCJul 21, 09:50 UTC1h 20m
2026-07-21 SAS1693 CPH → VIE Jul 21, 05:55 UTCJul 21, 07:10 UTC1h 15m
2026-07-21 SAS743 VNO → CPH Jul 21, 03:15 UTCJul 21, 04:35 UTC1h 20m
2026-07-20 SAS742 CPH → VNO Jul 20, 21:05 UTCJul 20, 22:20 UTC1h 15m
2026-07-20 SAS89B ZRH → CPH Jul 20, 18:40 UTCJul 20, 20:05 UTC1h 25m
2026-07-20 SAS609 CPH → ZRH Jul 20, 16:10 UTCJul 20, 17:40 UTC1h 30m
2026-07-20 SAS87R VNO → CPH Jul 20, 13:15 UTCJul 20, 14:35 UTC1h 20m
2026-07-20 SAS34J - Jul 20, 11:00 UTCJul 20, 12:15 UTC1h 15m
2026-07-20 SAS46R - Jul 20, 08:10 UTCJul 20, 09:45 UTC1h 35m
2026-07-20 SAS82A CPH → CDG Jul 20, 05:25 UTCJul 20, 06:55 UTC1h 30m
2026-07-19 SAS1656 STR → CPH Jul 19, 18:20 UTCJul 19, 19:30 UTC1h 10m
2026-07-19 SAS89L - Jul 19, 16:00 UTCJul 19, 17:10 UTC1h 10m
2026-07-19 SAS1713 HEL → CPH Jul 19, 13:05 UTCJul 19, 14:30 UTC1h 25m
2026-07-19 SAS1712 CPH → HEL Jul 19, 10:50 UTCJul 19, 12:05 UTC1h 15m
2026-07-19 SAS1875 SVG → CPH Jul 19, 08:20 UTCJul 19, 09:15 UTC55m
2026-07-19 SAS1870 CPH → SVG Jul 19, 06:45 UTCJul 19, 07:35 UTC50m
2026-07-19 SAS1705 HEL → CPH Jul 19, 03:40 UTCJul 19, 05:00 UTC1h 20m
2026-07-18 SAS45T CPH → HEL Jul 18, 21:10 UTCJul 18, 22:20 UTC1h 10m

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 EI-FPF page for operator, model, and routing details .

Mode-S 4CA660 frequently asked

What is Mode-S code 4CA660?
4CA660 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-FPF.
Where is Mode-S 4CA660 registered?
Mode-S code 4CA660 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA660 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA660, octal 23123140, decimal 5,023,328.
What flights does 4CA660 operate?
Mode-S 4CA660 has broadcast 20 distinct callsigns, including SAS84P, SAS1772, SAS684, SAS683, SAS36F.