Apparatus

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sensors Mode-S transponder

4891B2

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-ENT · BOEING 737-800

Hex
4891B2
Octal
22110662
Decimal
4,755,890
Country
PL
Tail
SP-ENT
Type
B738
Broadcasting now · callsign ENT4905 · 35,525 ft
Flights observed
261
Distinct callsigns
20
Country
PL
Last broadcast
53m ago

Current position

4891B2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4891B2 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
ENT6062 DAT Enterprise Limited 20 2026-04-27
ENT6063 - 19 2026-04-27
ENT6631 - 18 2026-04-27
ENT6632 - 16 2026-04-27
ENT9WS - 2 2026-06-05
ENT5RC - 2 2026-07-04
ENT5744 - 2 2026-05-30
ENT5743 - 2 2026-05-30
ENT5632 - 2 2026-05-24
ENT5631 - 2 2026-05-24
ENT5222 DAT Enterprise Limited 2 2026-05-22
ENT5221 - 2 2026-05-22
ENT5218 - 2 2026-06-04
ENT5215 - 2 2026-06-04
ENT5159 DAT Enterprise Limited 2 2026-05-26
ENT1RT - 2 2026-07-04
ENT1023 - 2 2026-07-07
ENT9ZF - 1 2026-05-29
ENT9TX - 1 2026-06-21
ENT9PM DAT Enterprise Limited 1 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ENT4905 - Jul 14, 12:35 UTCJul 14, 14:30 UTC1h 55m
2026-07-13 ENT4906 WRO → BZG Jul 13, 23:00 UTCJul 14, 08:40 UTC9h 40m
2026-07-13 ENT9DF - Jul 13, 13:45 UTCJul 13, 18:00 UTC4h 15m
2026-07-13 ENT2NZ - Jul 13, 06:35 UTCJul 13, 11:50 UTC5h 15m
2026-07-12 ENT4XA - Jul 12, 18:30 UTCJul 12, 20:30 UTC2h 0m
2026-07-12 ENT1MG - Jul 12, 15:20 UTCJul 12, 17:20 UTC2h 0m
2026-07-12 ENT4092 NBE → WRO Jul 12, 11:40 UTCJul 12, 14:05 UTC2h 25m
2026-07-12 ENT4091 WRO → NBE Jul 12, 08:15 UTCJul 12, 10:30 UTC2h 15m
2026-07-12 ENT3GK - Jul 12, 04:45 UTCJul 12, 07:05 UTC2h 20m
2026-07-12 ENT7ZA - Jul 12, 00:55 UTCJul 12, 03:15 UTC2h 20m
2026-07-11 ENT5228 - Jul 11, 15:55 UTCJul 11, 18:40 UTC2h 45m
2026-07-11 ENT1661 - Jul 11, 12:10 UTCJul 11, 14:40 UTC2h 30m
2026-07-10 ENT2RF RHO → WAW Jul 10, 18:10 UTCJul 10, 20:50 UTC2h 40m
2026-07-10 ENT1LX - Jul 10, 14:25 UTCJul 10, 16:55 UTC2h 30m
2026-07-10 ENT6HX RHO → BZG Jul 10, 10:00 UTCJul 10, 12:50 UTC2h 50m
2026-07-10 ENT4CD - Jul 10, 06:20 UTCJul 10, 08:40 UTC2h 20m
2026-07-09 ENT4956 WAW → WAW Jul 9, 07:25 UTCJul 9, 17:20 UTC9h 55m
2026-07-08 ENT3CJ - Jul 8, 12:40 UTCJul 8, 15:20 UTC2h 40m
2026-07-08 ENT7XJ - Jul 8, 08:55 UTCJul 8, 11:15 UTC2h 20m
2026-07-07 ENT1024 - Jul 7, 10:35 UTCJul 8, 05:30 UTC18h 55m
2026-07-07 ENT1023 - Jul 7, 08:35 UTCJul 8, 05:30 UTC20h 55m
2026-07-07 ENT1023 - Jul 7, 08:20 UTCJul 8, 05:30 UTC21h 10m
2026-07-06 ENT4NT - Jul 6, 14:05 UTCJul 6, 19:00 UTC4h 55m
2026-07-06 ENT8PE - Jul 6, 07:50 UTCJul 6, 12:55 UTC5h 5m
2026-07-04 ENT5RC - Jul 4, 23:30 UTCJul 5, 03:35 UTC4h 5m
2026-07-04 ENT5RC - Jul 4, 22:45 UTCJul 4, 23:00 UTC15m
2026-07-04 ENT1RT - Jul 4, 21:05 UTCJul 4, 21:10 UTC5m
2026-07-04 ENT1RT - Jul 4, 16:10 UTCJul 4, 20:20 UTC4h 10m
2026-07-04 ENT4140 - Jul 4, 02:25 UTCJul 4, 11:40 UTC9h 15m
2026-07-03 ENT721P - Jul 3, 19:05 UTCJul 3, 21:35 UTC2h 30m
2026-07-03 ENT720 - Jul 3, 15:40 UTCJul 3, 17:50 UTC2h 10m
2026-07-02 ENT512P - Jul 2, 08:10 UTCJul 2, 20:05 UTC11h 55m
2026-07-01 ENT8NK - Jul 1, 16:55 UTCJul 1, 18:25 UTC1h 30m
2026-06-29 ENT8ZU - Jun 29, 16:04 UTCJun 29, 17:19 UTC1h 15m
2026-06-29 ENT704 TIA → CDG Jun 29, 12:49 UTCJun 29, 14:54 UTC2h 5m
2026-06-29 ENT703P - Jun 29, 09:34 UTCJun 29, 11:10 UTC1h 35m
2026-06-28 ENT3DF CHQ → KAJ Jun 28, 18:59 UTCJun 28, 21:40 UTC2h 40m
2026-06-28 ENT2TF - Jun 28, 15:09 UTCJun 28, 17:44 UTC2h 35m
2026-06-28 ENT4NS - Jun 28, 04:29 UTCJun 28, 13:25 UTC8h 55m
2026-06-27 ENT7JK - Jun 27, 13:09 UTCJun 27, 21:50 UTC8h 40m
2026-06-27 ENT1GF - Jun 27, 08:35 UTCJun 27, 11:25 UTC2h 50m
2026-06-27 ENT6WB TLS → CDG Jun 27, 04:19 UTCJun 27, 07:04 UTC2h 45m
2026-06-26 ENT1UE - Jun 26, 12:14 UTCJun 26, 12:29 UTC15m
2026-06-26 ENT1XK - Jun 26, 09:20 UTCJun 26, 11:24 UTC2h 5m
2026-06-26 ENT3CX - Jun 26, 06:29 UTCJun 26, 08:05 UTC1h 35m
2026-06-25 ENT5GU - Jun 25, 11:10 UTCJun 25, 13:50 UTC2h 40m
2026-06-25 ENT3RW - Jun 25, 07:05 UTCJun 25, 09:40 UTC2h 35m
2026-06-23 ENT7TE - Jun 23, 16:29 UTCJun 23, 19:10 UTC2h 40m
2026-06-23 ENT9FS - Jun 23, 12:40 UTCJun 23, 15:09 UTC2h 30m
2026-06-23 ENT1ZW - Jun 23, 08:25 UTCJun 23, 11:10 UTC2h 45m

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-ENT page for operator, model, and routing details .

Mode-S 4891B2 frequently asked

What is Mode-S code 4891B2?
4891B2 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-ENT.
Where is Mode-S 4891B2 registered?
Mode-S code 4891B2 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4891B2 broadcasting right now?
Yes. Mode-S 4891B2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4891B2, octal 22110662, decimal 4,755,890.
What flights does 4891B2 operate?
Mode-S 4891B2 has broadcast 20 distinct callsigns, including ENT6062, ENT6063, ENT6631, ENT6632, ENT9WS.