sensors Mode-S transponder

4891B4

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-ENW · BOEING 737-800

Hex
4891B4
Octal
22110664
Decimal
4,755,892
Country
PL
Tail
SP-ENW
Type
B738
Broadcasting now · callsign ENT5165 · 37,000 ft
Flights observed
101
Distinct callsigns
20
Country
PL
Last broadcast
1h ago

Current position

4891B4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4891B4 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
ENT4003 DAT Enterprise Limited 3 2026-04-18
ENT778 DAT Enterprise Limited 2 2026-05-10
ENT777 DAT Enterprise Limited 2 2026-05-10
ENT4004 - 2 2026-04-18
ENT2LC DAT Enterprise Limited 2 2026-05-03
ENT9LJ DAT Enterprise Limited 1 2026-05-24
ENT9EW - 1 2026-05-08
ENT8YZ DAT Enterprise Limited 1 2026-05-10
ENT8YP - 1 2026-05-31
ENT8XN - 1 2026-05-21
ENT8TC - 1 2026-05-20
ENT8KA - 1 2026-05-08
ENT8JS - 1 2026-05-22
ENT8ED DAT Enterprise Limited 1 2026-05-09
ENT8AH - 1 2026-05-06
ENT7ZA DAT Enterprise Limited 1 2026-05-03
ENT7SC - 1 2026-05-23
ENT7PC - 1 2026-05-27
ENT7LE - 1 2026-05-08
ENT7LC - 1 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-03 ENT5165 - Jun 3, 00:55 UTCJun 3, 01:00 UTC5m
2026-06-02 ENT4904 BZG → WRO Jun 2, 13:30 UTCJun 2, 23:30 UTC10h 0m
2026-06-02 ENT4906 WRO → BZG Jun 2, 02:20 UTCJun 2, 12:05 UTC9h 45m
2026-06-01 ENT7292 - Jun 1, 08:20 UTCJun 1, 10:35 UTC2h 15m
2026-06-01 ENT7291 WAW → HER Jun 1, 04:45 UTCJun 1, 06:50 UTC2h 5m
2026-05-31 ENT7560 - May 31, 14:00 UTCMay 31, 16:30 UTC2h 30m
2026-05-31 ENT7559 - May 31, 10:05 UTCMay 31, 12:20 UTC2h 15m
2026-05-31 ENT8YP - May 31, 00:55 UTCMay 31, 01:11 UTC16m
2026-05-30 ENT4066 - May 30, 13:25 UTCMay 30, 23:20 UTC9h 55m
2026-05-30 ENT4065 WRO → GDN May 30, 01:40 UTCMay 30, 11:35 UTC9h 55m
2026-05-29 ENT5222 RKT → CMB May 29, 13:40 UTCMay 29, 16:35 UTC2h 55m
2026-05-29 ENT5221 - May 29, 10:00 UTCMay 29, 12:20 UTC2h 20m
2026-05-28 ENT4664 HRG → WAW May 28, 21:40 UTCMay 29, 00:05 UTC2h 25m
2026-05-28 ENT4663 WAW → HRG May 28, 17:55 UTCMay 28, 20:00 UTC2h 5m
2026-05-28 ENT7096 WRO → WRO May 28, 10:05 UTCMay 28, 16:25 UTC6h 20m
2026-05-28 ENT1010 - May 28, 04:15 UTCMay 28, 06:45 UTC2h 30m
2026-05-28 ENT1009 - May 28, 00:50 UTCMay 28, 03:00 UTC2h 10m
2026-05-27 ENT6CU - May 27, 20:55 UTCMay 27, 23:25 UTC2h 30m
2026-05-27 ENT7PC - May 27, 17:25 UTCMay 27, 19:45 UTC2h 20m
2026-05-26 ENT4905 - May 26, 13:54 UTCMay 26, 22:59 UTC9h 5m
2026-05-26 ENT4903 WRO → BZG May 26, 02:44 UTCMay 26, 12:30 UTC9h 45m
2026-05-25 ENT7LC - May 25, 18:25 UTCMay 25, 20:59 UTC2h 35m
2026-05-25 ENT7FA - May 25, 14:40 UTCMay 25, 17:30 UTC2h 50m
2026-05-24 ENT6UP - May 24, 19:00 UTCMay 24, 21:35 UTC2h 35m
2026-05-24 ENT5CN WAW → XRY May 24, 15:20 UTCMay 24, 17:50 UTC2h 30m
2026-05-24 ENT6PZ - May 24, 10:00 UTCMay 24, 13:55 UTC3h 55m
2026-05-24 ENT9LJ VLL → OSL May 24, 04:15 UTCMay 24, 08:10 UTC3h 55m
2026-05-23 ENT3KC - May 23, 17:50 UTCMay 23, 21:35 UTC3h 45m
2026-05-23 ENT1CY - May 23, 13:10 UTCMay 23, 16:45 UTC3h 35m
2026-05-23 ENT7SC - May 23, 09:10 UTCMay 23, 12:05 UTC2h 55m
2026-05-23 ENT3PB - May 23, 04:20 UTCMay 23, 07:10 UTC2h 50m
2026-05-22 ENT5XB - May 22, 18:30 UTCMay 22, 21:10 UTC2h 40m
2026-05-22 ENT8JS - May 22, 15:05 UTCMay 22, 17:35 UTC2h 30m
2026-05-22 ENT550P KRS → HAM May 22, 12:55 UTCMay 22, 13:45 UTC50m
2026-05-22 ENT551M - May 22, 10:00 UTCMay 22, 12:10 UTC2h 10m
2026-05-21 ENT3WD - May 21, 18:50 UTCMay 21, 21:10 UTC2h 20m
2026-05-21 ENT8XN - May 21, 14:20 UTCMay 21, 17:50 UTC3h 30m
2026-05-20 ENT3XC EBU → CDG May 20, 14:35 UTCMay 20, 17:05 UTC2h 30m
2026-05-20 ENT8TC - May 20, 10:35 UTCMay 20, 13:05 UTC2h 30m
2026-05-18 ENT7552 WAW → WAW May 18, 06:45 UTCMay 18, 16:20 UTC9h 35m
2026-05-17 ENT4182 AYT → SZZ May 17, 10:00 UTCMay 17, 19:40 UTC9h 40m
2026-05-16 ENT6EY FNC → WAW May 16, 13:31 UTCMay 16, 18:00 UTC4h 30m
2026-05-16 ENT3KZ LEH → FNC May 16, 09:01 UTCMay 16, 12:31 UTC3h 30m
2026-05-16 ENT6SH CDG → LEH May 16, 07:16 UTCMay 16, 07:45 UTC30m
2026-05-15 ENT5LX PMO → CDG May 15, 17:10 UTCMay 15, 19:15 UTC2h 5m
2026-05-15 ENT3TK - May 15, 14:15 UTCMay 15, 15:45 UTC1h 29m
2026-05-15 ENT2BS - May 15, 12:05 UTCMay 15, 13:05 UTC1h 0m
2026-05-15 ENT6LZ - May 15, 08:40 UTCMay 15, 11:00 UTC2h 20m
2026-05-15 ENT5KH CDG → PMO May 15, 05:25 UTCMay 15, 07:10 UTC1h 45m
2026-05-11 ENT7EZ LNZ → SZG May 11, 17:15 UTCMay 11, 18:10 UTC55m

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

Mode-S 4891B4 frequently asked

What is Mode-S code 4891B4?
4891B4 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-ENW.
Where is Mode-S 4891B4 registered?
Mode-S code 4891B4 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4891B4 broadcasting right now?
Yes. Mode-S 4891B4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4891B4, octal 22110664, decimal 4,755,892.
What flights does 4891B4 operate?
Mode-S 4891B4 has broadcast 20 distinct callsigns, including ENT4003, ENT778, ENT777, ENT4004, ENT2LC.