Apparatus

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sensors Mode-S transponder

4891B3

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-ENU · BOEING 737-800

Hex
4891B3
Octal
22110663
Decimal
4,755,891
Country
PL
Tail
SP-ENU
Type
B738
Broadcasting now · callsign ENT4067 · 37,000 ft
Flights observed
208
Distinct callsigns
20
Country
PL
Last broadcast
3h ago

Current position

4891B3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4891B3 falls within the block assigned to Poland (PL) by ICAO Annex 10, Volume III. Every aircraft registered in Poland 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
ENT6063 - 4 2026-05-22
ENT6062 DAT Enterprise Limited 4 2026-05-23
ENT6632 - 3 2026-05-23
ENT4597 DAT Enterprise Limited 3 2026-04-18
ENT1089 - 3 2026-04-16
ENT6AF - 2 2026-07-03
ENT6631 - 2 2026-05-22
ENT5DW - 2 2026-05-23
ENT4142 - 2 2026-05-09
ENT4082 - 2 2026-07-05
ENT4081 - 2 2026-07-05
ENT1090 - 2 2026-04-16
ENT9YS - 1 2026-07-03
ENT9YM - 1 2026-07-09
ENT9YB DAT Enterprise Limited 1 2026-06-13
ENT9WC - 1 2026-06-12
ENT9SZ - 1 2026-05-27
ENT9ST - 1 2026-06-07
ENT9PS - 1 2026-06-14
ENT9PA - 1 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 ENT4068 - Jul 18, 01:39 UTCJul 18, 11:25 UTC9h 46m
2026-07-17 ENT1DU - Jul 17, 18:29 UTCJul 17, 20:15 UTC1h 45m
2026-07-17 ENT3UE - Jul 17, 15:40 UTCJul 17, 17:25 UTC1h 45m
2026-07-17 ENT2LM - Jul 17, 12:19 UTCJul 17, 14:00 UTC1h 40m
2026-07-17 ENT5EN - Jul 17, 09:10 UTCJul 17, 11:04 UTC1h 55m
2026-07-17 ENT3GU ZTH → WAW Jul 17, 05:45 UTCJul 17, 07:35 UTC1h 50m
2026-07-17 ENT8UJ GRO → KTW Jul 17, 02:50 UTCJul 17, 04:29 UTC1h 40m
2026-07-16 ENT7514 WRO → WRO Jul 16, 08:10 UTCJul 16, 17:45 UTC9h 35m
2026-07-16 ENT1010 - Jul 16, 04:15 UTCJul 16, 06:40 UTC2h 25m
2026-07-16 ENT1009 - Jul 16, 00:50 UTCJul 16, 02:55 UTC2h 5m
2026-07-15 ENT5166 - Jul 15, 17:05 UTCJul 15, 19:50 UTC2h 45m
2026-07-15 ENT7501 - Jul 15, 12:50 UTCJul 15, 15:45 UTC2h 55m
2026-07-15 ENT7502 - Jul 15, 08:30 UTCJul 15, 11:30 UTC3h 0m
2026-07-15 ENT5165 - Jul 15, 04:45 UTCJul 15, 07:20 UTC2h 35m
2026-07-14 ENT4LN - Jul 14, 20:35 UTCJul 15, 00:45 UTC4h 9m
2026-07-14 ENT1JA - Jul 14, 13:50 UTCJul 14, 18:50 UTC5h 0m
2026-07-14 ENT7748 WRO → WRO Jul 14, 02:20 UTCJul 14, 11:55 UTC9h 35m
2026-07-13 ENT5SA WRO → WRO Jul 13, 14:15 UTCJul 14, 00:40 UTC10h 25m
2026-07-13 ENT7292 - Jul 13, 08:05 UTCJul 13, 10:30 UTC2h 25m
2026-07-13 ENT7291 WRO → NBE Jul 13, 04:40 UTCJul 13, 07:01 UTC2h 20m
2026-07-12 ENT2LG - Jul 12, 23:20 UTCJul 13, 01:50 UTC2h 30m
2026-07-12 ENT2JF - Jul 12, 19:35 UTCJul 12, 21:50 UTC2h 15m
2026-07-11 ENT1668 - Jul 11, 18:40 UTCJul 11, 21:45 UTC3h 5m
2026-07-11 ENT1667 - Jul 11, 14:25 UTCJul 11, 17:20 UTC2h 55m
2026-07-11 ENT7360 - Jul 11, 09:30 UTCJul 11, 12:50 UTC3h 20m
2026-07-11 ENT7359 - Jul 11, 05:05 UTCJul 11, 08:05 UTC3h 0m
2026-07-10 ENT8KD - Jul 10, 16:40 UTCJul 11, 04:05 UTC11h 25m
2026-07-10 ENT6ZD - Jul 10, 09:35 UTCJul 10, 13:00 UTC3h 25m
2026-07-10 ENT7CE - Jul 10, 04:45 UTCJul 10, 08:20 UTC3h 35m
2026-07-09 ENT9YM - Jul 9, 14:45 UTCJul 9, 19:50 UTC5h 5m
2026-07-09 ENT8ZD - Jul 9, 08:10 UTCJul 9, 13:10 UTC5h 0m
2026-07-08 ENT2EK - Jul 8, 14:55 UTCJul 8, 17:30 UTC2h 35m
2026-07-08 ENT6HD - Jul 8, 10:55 UTCJul 8, 13:10 UTC2h 15m
2026-07-08 ENT4492 - Jul 8, 02:10 UTCJul 8, 04:55 UTC2h 45m
2026-07-07 ENT4777 - Jul 7, 22:45 UTCJul 8, 01:10 UTC2h 25m
2026-07-07 ENT7320 - Jul 7, 06:35 UTCJul 7, 15:10 UTC8h 35m
2026-07-06 ENT7994 - Jul 6, 21:05 UTCJul 6, 23:30 UTC2h 25m
2026-07-06 ENT1663 - Jul 6, 17:25 UTCJul 6, 19:55 UTC2h 30m
2026-07-06 ENT1664 - Jul 6, 13:50 UTCJul 6, 16:15 UTC2h 25m
2026-07-06 ENT4023 - Jul 6, 10:05 UTCJul 6, 12:40 UTC2h 35m
2026-07-06 ENT4024 - Jul 6, 06:35 UTCJul 6, 09:05 UTC2h 30m
2026-07-06 ENT7993 - Jul 6, 03:05 UTCJul 6, 05:10 UTC2h 5m
2026-07-05 ENT4081 - Jul 5, 16:45 UTCJul 6, 01:55 UTC9h 10m
2026-07-05 ENT4082 - Jul 5, 04:30 UTCJul 5, 13:35 UTC9h 5m
2026-07-04 ENT7408 - Jul 4, 16:35 UTCJul 5, 02:05 UTC9h 30m
2026-07-04 ENT7996 - Jul 4, 02:15 UTCJul 4, 09:45 UTC7h 30m
2026-07-03 ENT9YS - Jul 3, 22:05 UTCJul 4, 00:30 UTC2h 25m
2026-07-03 ENT6AF - Jul 3, 18:15 UTCJul 3, 20:35 UTC2h 20m
2026-07-03 ENT1042 - Jul 3, 13:30 UTCJul 3, 16:50 UTC3h 20m
2026-07-03 ENT1041 - Jul 3, 08:55 UTCJul 3, 12:10 UTC3h 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 SP-ENU page for operator, model, and routing details .

Mode-S 4891B3 frequently asked

What is Mode-S code 4891B3?
4891B3 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-ENU.
Where is Mode-S 4891B3 registered?
Mode-S code 4891B3 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4891B3 broadcasting right now?
Yes. Mode-S 4891B3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4891B3, octal 22110663, decimal 4,755,891.
What flights does 4891B3 operate?
Mode-S 4891B3 has broadcast 20 distinct callsigns, including ENT6063, ENT6062, ENT6632, ENT4597, ENT1089.