Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4A1A62

ICAO 24-bit transponder address · allocated to Romania

Currently assigned to YR-FSB · BOEING 747-400

Hex
4A1A62
Octal
22415142
Decimal
4,856,418
Country
RO
Tail
YR-FSB
Type
B744
No current signal · last broadcast Jul 6, 17:00 UTC
Flights observed
146
Distinct callsigns
13
Country
RO
Last broadcast
Jul 6, 17:00 UTC

Last known position

Most recent position reported by Mode-S 4A1A62.

Country allocation

The ICAO 24-bit address 4A1A62 falls within the block assigned to Romania (RO) by ICAO Annex 10, Volume III. Every aircraft registered in Romania 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 13 distinct

Callsign Airline Flights Last seen
RCR3302 - 92 2026-07-06
RCR3301 - 29 2026-07-05
RCR3303 - 6 2026-05-24
RCR5530 - 4 2026-06-22
RCR5509 - 2 2026-05-28
RCR3623 - 2 2026-04-23
RCR3422 - 2 2026-06-22
RCR3328 - 2 2026-05-29
RCR3320 - 2 2026-06-30
RCR3312 - 2 2026-06-22
RCR7635 - 1 2026-05-24
RCR3622 - 1 2026-04-22
RCR3360 - 1 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-06 RCR3360 - Jul 6, 15:55 UTCJul 6, 17:00 UTC1h 5m
2026-07-06 RCR3302 - Jul 6, 09:50 UTCJul 6, 10:10 UTC20m
2026-07-05 RCR3302 - Jul 5, 14:35 UTCJul 6, 08:55 UTC18h 20m
2026-07-05 RCR3301 - Jul 5, 14:00 UTCJul 6, 08:55 UTC18h 55m
2026-07-05 RCR3302 - Jul 5, 07:35 UTCJul 5, 10:05 UTC2h 30m
2026-07-04 RCR3302 - Jul 4, 13:25 UTCJul 5, 10:05 UTC20h 40m
2026-07-03 RCR3301 - Jul 3, 14:50 UTCJul 4, 08:30 UTC17h 40m
2026-07-02 RCR3302 - Jul 2, 14:35 UTCJul 3, 09:45 UTC19h 10m
2026-07-02 RCR3301 - Jul 2, 13:50 UTCJul 3, 09:45 UTC19h 55m
2026-07-02 RCR3302 - Jul 2, 08:15 UTCJul 2, 10:50 UTC2h 35m
2026-07-01 RCR3302 - Jul 1, 15:05 UTCJul 2, 10:50 UTC19h 45m
2026-07-01 RCR3302 - Jul 1, 13:05 UTCJul 2, 10:50 UTC21h 45m
2026-07-01 RCR3302 - Jul 1, 08:55 UTCJul 1, 09:15 UTC20m
2026-06-30 RCR3302 - Jun 30, 10:40 UTCJul 1, 08:05 UTC21h 25m
2026-06-30 RCR3320 - Jun 30, 09:05 UTCJun 30, 11:10 UTC2h 5m
2026-06-29 RCR3320 - Jun 29, 21:19 UTCJun 29, 22:39 UTC1h 20m
2026-06-29 RCR3302 - Jun 29, 12:20 UTCJun 29, 14:54 UTC2h 35m
2026-06-28 RCR3302 - Jun 28, 14:59 UTCJun 29, 14:29 UTC23h 30m
2026-06-28 RCR3302 - Jun 28, 08:25 UTCJun 28, 10:44 UTC2h 20m
2026-06-27 RCR3302 - Jun 27, 10:45 UTCJun 28, 10:30 UTC23h 45m
2026-06-27 RCR3301 - Jun 27, 09:09 UTCJun 28, 08:29 UTC23h 20m
2026-06-27 RCR3302 - Jun 27, 02:45 UTCJun 27, 04:00 UTC1h 15m
2026-06-26 RCR3301 - Jun 26, 01:39 UTCJun 26, 02:24 UTC45m
2026-06-25 RCR3302 - Jun 25, 14:14 UTCJun 25, 14:34 UTC20m
2026-06-24 RCR3302 - Jun 24, 22:45 UTCJun 25, 13:20 UTC14h 35m
2026-06-24 RCR3302 - Jun 24, 17:05 UTCJun 24, 18:20 UTC1h 15m
2026-06-23 RCR3301 - Jun 23, 15:24 UTCJun 23, 17:44 UTC2h 20m
2026-06-22 RCR3312 BUD → OTP Jun 22, 20:44 UTCJun 23, 13:00 UTC16h 15m
2026-06-22 RCR3422 - Jun 22, 14:14 UTCJun 22, 17:25 UTC3h 10m
2026-06-22 RCR3422 - Jun 22, 02:59 UTCJun 22, 03:14 UTC15m
2026-06-22 RCR5530 - Jun 22, 00:04 UTCJun 22, 00:40 UTC35m
2026-06-21 RCR5530 - Jun 21, 14:54 UTCJun 21, 16:54 UTC2h 0m
2026-06-21 RCR3302 - Jun 21, 09:59 UTCJun 21, 10:19 UTC20m
2026-06-20 RCR3302 - Jun 20, 13:29 UTCJun 21, 09:15 UTC19h 45m
2026-06-20 RCR3302 - Jun 20, 09:29 UTCJun 20, 09:39 UTC10m
2026-06-19 RCR3302 - Jun 19, 14:34 UTCJun 20, 08:34 UTC18h 0m
2026-06-19 RCR3301 - Jun 19, 13:50 UTCJun 20, 08:34 UTC18h 45m
2026-06-18 RCR3302 - Jun 18, 14:35 UTCJun 19, 09:40 UTC19h 4m
2026-06-18 RCR3302 - Jun 18, 14:01 UTCJun 19, 09:40 UTC19h 39m
2026-06-17 RCR3302 - Jun 17, 14:35 UTCJun 18, 09:55 UTC19h 20m
2026-06-17 RCR3301 - Jun 17, 13:55 UTCJun 18, 09:55 UTC20h 0m
2026-06-17 RCR3302 - Jun 17, 09:25 UTCJun 17, 09:45 UTC20m
2026-06-16 RCR3301 - Jun 16, 14:35 UTCJun 17, 08:35 UTC18h 1m
2026-06-16 RCR3301 - Jun 16, 14:20 UTCJun 17, 08:35 UTC18h 16m
2026-06-16 RCR3302 - Jun 16, 08:55 UTCJun 16, 11:35 UTC2h 40m
2026-06-15 RCR3302 - Jun 15, 14:45 UTCJun 16, 11:35 UTC20h 50m
2026-06-15 RCR3302 - Jun 15, 10:40 UTCJun 15, 11:00 UTC20m
2026-06-15 RCR3302 - Jun 15, 08:35 UTCJun 15, 09:49 UTC1h 15m
2026-06-13 RCR3301 - Jun 13, 13:45 UTCJun 13, 15:55 UTC2h 10m
2026-06-13 RCR3302 - Jun 13, 09:55 UTCJun 13, 10:15 UTC20m

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 YR-FSB page for operator, model, and routing details .

Mode-S 4A1A62 frequently asked

What is Mode-S code 4A1A62?
4A1A62 is an ICAO 24-bit transponder address. Allocated to Romania. Assigned to YR-FSB.
Where is Mode-S 4A1A62 registered?
Mode-S code 4A1A62 is allocated to Romania (RO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4A1A62 broadcasting right now?
No active broadcast right now. Last signal was Jul 6, 17:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4A1A62, octal 22415142, decimal 4,856,418.
What flights does 4A1A62 operate?
Mode-S 4A1A62 has broadcast 13 distinct callsigns, including RCR3302, RCR3301, RCR3303, RCR5530, RCR5509.