Apparatus

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sensors Mode-S transponder

503CB4

ICAO 24-bit transponder address · allocated to Lithuania

Currently assigned to YL-BBN · BOEING 737-800

Hex
503CB4
Octal
24036264
Decimal
5,258,420
Country
LT
Tail
YL-BBN
Type
B738
No current signal · last broadcast 1h ago
Flights observed
135
Distinct callsigns
20
Country
LT
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 503CB4.

Country allocation

The ICAO 24-bit address 503CB4 falls within the block assigned to Lithuania (LT) by ICAO Annex 10, Volume III. Every aircraft registered in Lithuania 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
ELY5466 - 6 2026-07-07
ELY5465 - 5 2026-07-07
ELY5156 - 5 2026-07-14
ELY5155 - 5 2026-07-14
ELY5184 - 4 2026-07-13
ELY5183 - 4 2026-07-13
ELY5127 - 4 2026-07-14
ELY5114 - 4 2026-07-05
ELY5113 - 4 2026-07-05
ELY5064 - 4 2026-07-07
ELY5063 - 4 2026-07-07
ELY5468 El Al Israel Airlines 3 2026-05-31
ELY5467 El Al Israel Airlines 3 2026-05-31
ELY5182 - 3 2026-06-30
ELY5181 - 3 2026-06-30
ELY5141 El Al Israel Airlines 3 2026-06-02
ELY5138 - 3 2026-07-02
ELY5137 - 3 2026-07-02
ELY5115 - 3 2026-06-25
KLJ9905 - 2 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ELY5127 - Jul 14, 17:45 UTCJul 14, 19:00 UTC1h 15m
2026-07-14 ELY5156 - Jul 14, 08:05 UTCJul 14, 10:05 UTC2h 0m
2026-07-14 ELY5155 - Jul 14, 04:30 UTCJul 14, 06:25 UTC1h 55m
2026-07-13 ELY5112 - Jul 13, 16:55 UTCJul 13, 19:35 UTC2h 40m
2026-07-13 ELY5111 - Jul 13, 12:20 UTCJul 13, 15:05 UTC2h 45m
2026-07-13 ELY5184 - Jul 13, 06:50 UTCJul 13, 09:00 UTC2h 10m
2026-07-13 ELY5183 - Jul 13, 02:30 UTCJul 13, 04:40 UTC2h 10m
2026-07-12 ELY5450 PVK → TLV Jul 12, 15:01 UTCJul 12, 17:01 UTC2h 0m
2026-07-12 ELY5449 TLV → PVK Jul 12, 11:15 UTCJul 12, 13:20 UTC2h 5m
2026-07-12 ELY5458 - Jul 12, 07:05 UTCJul 12, 09:05 UTC2h 0m
2026-07-12 ELY5457 TLV → EFL Jul 12, 03:30 UTCJul 12, 05:50 UTC2h 20m
2026-07-11 ELY5440 PFO → TLV Jul 11, 22:15 UTCJul 11, 22:50 UTC35m
2026-07-10 ELY5439 - Jul 10, 10:35 UTCJul 10, 11:10 UTC35m
2026-07-10 ELY5462 RHO → TLV Jul 10, 07:15 UTCJul 10, 08:30 UTC1h 15m
2026-07-10 ELY5461 TLV → RHO Jul 10, 04:45 UTCJul 10, 06:00 UTC1h 15m
2026-07-09 ELY5450 - Jul 9, 16:15 UTCJul 9, 18:10 UTC1h 55m
2026-07-09 ELY5449 - Jul 9, 12:35 UTCJul 9, 14:50 UTC2h 15m
2026-07-09 ELY5458 - Jul 9, 08:30 UTCJul 9, 10:30 UTC2h 0m
2026-07-09 ELY5457 TLV → EFL Jul 9, 04:50 UTCJul 9, 07:00 UTC2h 10m
2026-07-08 ELY5426 - Jul 8, 15:45 UTCJul 8, 18:10 UTC2h 25m
2026-07-08 ELY5425 - Jul 8, 11:20 UTCJul 8, 14:05 UTC2h 45m
2026-07-08 ELY5140 LCA → TLV Jul 8, 06:55 UTCJul 8, 07:40 UTC45m
2026-07-08 ELY5139 - Jul 8, 04:40 UTCJul 8, 05:25 UTC45m
2026-07-07 ELY5127 TLV → RMO Jul 7, 17:20 UTCJul 7, 23:40 UTC6h 20m
2026-07-07 ELY5064 - Jul 7, 14:20 UTCJul 7, 15:30 UTC1h 10m
2026-07-07 ELY5063 - Jul 7, 11:15 UTCJul 7, 12:30 UTC1h 15m
2026-07-07 ELY5466 - Jul 7, 06:20 UTCJul 7, 08:40 UTC2h 20m
2026-07-07 ELY5465 - Jul 7, 02:15 UTCJul 7, 04:30 UTC2h 15m
2026-07-06 ELY5064 - Jul 6, 15:35 UTCJul 6, 16:45 UTC1h 10m
2026-07-06 ELY5063 - Jul 6, 12:30 UTCJul 6, 13:45 UTC1h 15m
2026-07-06 ELY5194 - Jul 6, 07:15 UTCJul 6, 10:30 UTC3h 15m
2026-07-06 ELY5193 TLV → SZG Jul 6, 02:35 UTCJul 6, 06:10 UTC3h 35m
2026-07-05 ELY5184 - Jul 5, 21:50 UTCJul 5, 23:45 UTC1h 55m
2026-07-05 ELY5183 - Jul 5, 16:55 UTCJul 5, 19:10 UTC2h 15m
2026-07-05 ELY5032 RHO → TLV Jul 5, 13:40 UTCJul 5, 14:50 UTC1h 10m
2026-07-05 ELY5031 TLV → RHO Jul 5, 10:20 UTCJul 5, 11:40 UTC1h 20m
2026-07-05 ELY5114 BUS → TLV Jul 5, 05:50 UTCJul 5, 07:50 UTC2h 0m
2026-07-05 ELY5113 TLV → BUS Jul 5, 02:45 UTCJul 5, 04:35 UTC1h 50m
2026-07-04 ELY5248 SKG → TLV Jul 4, 21:55 UTCJul 4, 23:50 UTC1h 55m
2026-07-03 ELY5247 TLV → SKG Jul 3, 11:40 UTCJul 3, 13:45 UTC2h 5m
2026-07-03 ELY5466 - Jul 3, 06:10 UTCJul 3, 08:30 UTC2h 20m
2026-07-03 ELY5465 - Jul 3, 02:10 UTCJul 3, 04:20 UTC2h 10m
2026-07-02 ELY5138 PFO → TLV Jul 2, 13:35 UTCJul 2, 14:25 UTC50m
2026-07-02 ELY5137 - Jul 2, 11:35 UTCJul 2, 12:20 UTC45m
2026-07-02 KLJ5608 BTS → TLV Jul 2, 06:45 UTCJul 2, 10:00 UTC3h 15m
2026-07-01 KLJ5607 TLV → BTS Jul 1, 06:15 UTCJul 1, 09:15 UTC3h 0m
2026-06-30 ELY5182 - Jun 30, 21:50 UTCJul 1, 01:00 UTC3h 10m
2026-06-30 ELY5181 - Jun 30, 17:00 UTCJun 30, 19:50 UTC2h 50m
2026-06-30 ELY5156 VAR → TLV Jun 30, 08:05 UTCJun 30, 10:10 UTC2h 5m
2026-06-30 ELY5155 TLV → VAR Jun 30, 04:40 UTCJun 30, 06:40 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 YL-BBN page for operator, model, and routing details .

Mode-S 503CB4 frequently asked

What is Mode-S code 503CB4?
503CB4 is an ICAO 24-bit transponder address. Allocated to Lithuania. Assigned to YL-BBN.
Where is Mode-S 503CB4 registered?
Mode-S code 503CB4 is allocated to Lithuania (LT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 503CB4 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 503CB4, octal 24036264, decimal 5,258,420.
What flights does 503CB4 operate?
Mode-S 503CB4 has broadcast 20 distinct callsigns, including ELY5466, ELY5465, ELY5156, ELY5155, ELY5184.