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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
Broadcasting now · callsign SAS84P · 100 ft
Flights observed
240
Distinct callsigns
20
Country
IE
Last broadcast
43m ago

Current position

4CA660 is currently broadcasting. Map zoomed to live position.

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 - 6 2026-05-30
SAS1798 Scandinavian Airlines System 6 2026-05-29
SAS1797 Scandinavian Airlines System 6 2026-05-29
SAS2892 Scandinavian Airlines System 5 2026-05-14
SAS1790 Scandinavian Airlines System 5 2026-05-29
SAS1643 Scandinavian Airlines System 5 2026-05-07
SAS1642 Scandinavian Airlines System 5 2026-05-07
SAS684 Scandinavian Airlines System 4 2026-05-28
SAS683 Scandinavian Airlines System 4 2026-05-28
SAS629 Scandinavian Airlines System 4 2026-05-28
SAS620 Scandinavian Airlines System 4 2026-05-29
SAS36F Scandinavian Airlines System 4 2026-05-16
SAS30U - 4 2026-05-16
SAS2893 Scandinavian Airlines System 4 2026-05-14
SAS1645 Scandinavian Airlines System 4 2026-05-07
SAS1644 Scandinavian Airlines System 4 2026-05-06
SAS1621 Scandinavian Airlines System 4 2026-05-29
SAS1609 Scandinavian Airlines System 4 2026-05-04
SAS99A Scandinavian Airlines System 3 2026-05-12
SAS764 Scandinavian Airlines System 3 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 SAS84P - May 30, 03:25 UTCMay 30, 04:00 UTC35m
2026-05-29 SAS1790 CPH → TLL May 29, 21:05 UTCMay 29, 22:20 UTC1h 15m
2026-05-29 SAS1656 STR → CPH May 29, 18:25 UTCMay 29, 19:40 UTC1h 15m
2026-05-29 SAS89L CPH → STR May 29, 16:20 UTCMay 29, 17:30 UTC1h 10m
2026-05-29 SAS1622 DUS → CPH May 29, 13:50 UTCMay 29, 15:00 UTC1h 10m
2026-05-29 SAS1621 CPH → DUS May 29, 11:40 UTCMay 29, 12:40 UTC1h 0m
2026-05-29 SAS1797 TLL → CPH May 29, 08:40 UTCMay 29, 10:00 UTC1h 20m
2026-05-29 SAS1798 CPH → TLL May 29, 06:25 UTCMay 29, 07:45 UTC1h 20m
2026-05-29 SAS620 DUS → CPH May 29, 04:15 UTCMay 29, 05:10 UTC55m
2026-05-28 SAS629 CPH → DUS May 28, 19:00 UTCMay 28, 20:00 UTC1h 0m
2026-05-28 SAS11N MUC → CPH May 28, 12:45 UTCMay 28, 13:55 UTC1h 10m
2026-05-28 SAS1665 CPH → MUC May 28, 10:35 UTCMay 28, 11:45 UTC1h 10m
2026-05-28 SAS684 CPH → MXP May 28, 07:40 UTCMay 28, 09:25 UTC1h 45m
2026-05-28 SAS683 MXP → CPH May 28, 04:40 UTCMay 28, 06:20 UTC1h 40m
2026-05-16 SAS30U TLL → CPH May 16, 13:01 UTCMay 16, 14:20 UTC1h 20m
2026-05-16 SAS36F CPH → TLL May 16, 10:55 UTCMay 16, 12:11 UTC1h 15m
2026-05-16 SAS658 STR → CPH May 16, 08:55 UTCMay 16, 10:05 UTC1h 10m
2026-05-16 SAS657 CPH → STR May 16, 07:05 UTCMay 16, 08:16 UTC1h 10m
2026-05-15 SAS1797 TLL → CPH May 15, 09:10 UTCMay 15, 10:25 UTC1h 15m
2026-05-15 SAS1798 CPH → TLL May 15, 06:25 UTCMay 15, 07:35 UTC1h 10m
2026-05-15 SAS620 DUS → CPH May 15, 04:15 UTCMay 15, 05:15 UTC1h 0m
2026-05-14 SAS629 CPH → DUS May 14, 18:50 UTCMay 14, 19:50 UTC1h 0m
2026-05-14 SAS2893 AES → CPH May 14, 13:05 UTCMay 14, 14:35 UTC1h 30m
2026-05-14 SAS2892 CPH → AES May 14, 10:55 UTCMay 14, 12:00 UTC1h 5m
2026-05-14 SAS745 VNO → CPH May 14, 08:10 UTCMay 14, 09:30 UTC1h 20m
2026-05-14 SAS744 CPH → VNO May 14, 06:10 UTCMay 14, 07:25 UTC1h 15m
2026-05-13 SAS1800 KRK → CPH May 13, 18:15 UTCMay 13, 19:25 UTC1h 10m
2026-05-13 SAS1799 CPH → KRK May 13, 16:10 UTCMay 13, 17:20 UTC1h 10m
2026-05-13 SAS2711 TKU → CPH May 13, 13:00 UTCMay 13, 14:10 UTC1h 10m
2026-05-13 SAS2710 CPH → TKU May 13, 10:50 UTCMay 13, 11:50 UTC1h 0m
2026-05-13 SAS1797 TLL → CPH May 13, 08:40 UTCMay 13, 10:00 UTC1h 20m
2026-05-13 SAS1798 CPH → TLL May 13, 06:35 UTCMay 13, 07:45 UTC1h 10m
2026-05-13 SAS620 DUS → CPH May 13, 04:35 UTCMay 13, 05:35 UTC1h 0m
2026-05-12 SAS629 CPH → DUS May 12, 19:00 UTCMay 12, 20:05 UTC1h 5m
2026-05-12 SAS2873 BGO → CPH May 12, 14:05 UTCMay 12, 15:10 UTC1h 5m
2026-05-12 SAS2868 CPH → BGO May 12, 12:20 UTCMay 12, 13:25 UTC1h 5m
2026-05-12 SAS99A TRD → CPH May 12, 08:10 UTCMay 12, 09:35 UTC1h 25m
2026-05-12 SAS68H CPH → TRD May 12, 06:15 UTCMay 12, 07:30 UTC1h 15m
2026-05-12 SAS84P - May 12, 03:15 UTCMay 12, 04:40 UTC1h 25m
2026-05-11 SAS1772 ARN → TLL May 11, 20:05 UTCMay 11, 20:40 UTC35m
2026-05-11 SAS82T TLL → ARN May 11, 13:00 UTCMay 11, 13:45 UTC45m
2026-05-11 SAS40L ARN → TLL May 11, 11:25 UTCMay 11, 12:10 UTC45m
2026-05-11 SAS2498 BLL → ARN May 11, 08:25 UTCMay 11, 09:20 UTC55m
2026-05-11 SAS2497 ARN → BLL May 11, 06:35 UTCMay 11, 07:45 UTC1h 10m
2026-05-11 SAS57F HEL → ARN May 11, 04:25 UTCMay 11, 05:15 UTC50m
2026-05-10 SAS728 HEL → ARN May 10, 20:35 UTCMay 10, 21:14 UTC40m
2026-05-10 SAS126 MMX → ARN May 10, 18:20 UTCMay 10, 19:09 UTC50m
2026-05-10 SAS121 ARN → MMX May 10, 16:34 UTCMay 10, 17:30 UTC55m
2026-05-10 SAS77A BRU → ARN May 10, 09:00 UTCMay 10, 10:45 UTC1h 45m
2026-05-10 SAS589 ARN → BRU May 10, 06:15 UTCMay 10, 08:15 UTC2h 0m

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?
Yes. Mode-S 4CA660 is currently airborne.
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, SAS1798, SAS1797, SAS2892, SAS1790.