Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4891B8

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-ENV · BOEING 737-800

Hex
4891B8
Octal
22110670
Decimal
4,755,896
Country
PL
Tail
SP-ENV
Type
B738
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
254
Distinct callsigns
20
Country
PL
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S 4891B8.

Country allocation

The ICAO 24-bit address 4891B8 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
ENT6052 DAT Enterprise Limited 8 2026-07-24
ENT6051 DAT Enterprise Limited 6 2026-07-22
ENT7598 DAT Enterprise Limited 3 2026-04-14
ENT501N - 3 2026-05-20
ENT8UY - 2 2026-07-12
ENT7344 - 2 2026-06-06
ENT6RB - 2 2026-05-31
ENT5MU - 2 2026-04-15
ENT532 - 2 2026-06-27
ENT516P DAT Enterprise Limited 2 2026-05-16
ENT4US - 2 2026-07-19
ENT4866 - 2 2026-06-23
ENT4185 - 2 2026-06-21
ENT3CU DAT Enterprise Limited 2 2026-04-15
ENT2ZU DAT Enterprise Limited 2 2026-07-21
ENT9ZP - 1 2026-06-26
ENT9ZB - 1 2026-06-26
ENT9YC - 1 2026-07-11
ENT9XK - 1 2026-07-26
ENT9XF - 1 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENT4RF CTA → WAW Jul 26, 19:25 UTCJul 26, 22:00 UTC2h 35m
2026-07-26 ENT8GC PRG → RMI Jul 26, 15:40 UTCJul 26, 18:05 UTC2h 25m
2026-07-26 ENT9XK - Jul 26, 10:30 UTCJul 26, 14:10 UTC3h 40m
2026-07-26 ENT6MH - Jul 26, 04:50 UTCJul 26, 08:20 UTC3h 31m
2026-07-25 ENT3MF BSL → BSL Jul 25, 12:30 UTCJul 25, 21:35 UTC9h 5m
2026-07-25 ENT6TK WAW → LPA Jul 25, 08:00 UTCJul 25, 11:10 UTC3h 10m
2026-07-25 ENT3CD BLL → ZAD Jul 25, 04:10 UTCJul 25, 06:45 UTC2h 35m
2026-07-24 ENT6052 PRN → EAP Jul 24, 17:30 UTCJul 24, 22:00 UTC4h 30m
2026-07-24 ENT2TA - Jul 24, 13:10 UTCJul 24, 16:05 UTC2h 55m
2026-07-24 ENT5FP BSL → KGS Jul 24, 07:15 UTCJul 24, 09:45 UTC2h 30m
2026-07-23 ENT4GB POZ → LPA Jul 23, 11:10 UTCJul 23, 14:00 UTC2h 50m
2026-07-23 ENT5NA KTW → FNC Jul 23, 07:15 UTCJul 23, 09:35 UTC2h 20m
2026-07-22 ENT6052 PRN → EAP Jul 22, 18:05 UTCJul 22, 19:55 UTC1h 50m
2026-07-22 ENT6051 EAP → PRN Jul 22, 15:30 UTCJul 22, 16:55 UTC1h 25m
2026-07-22 ENT6US - Jul 22, 11:40 UTCJul 22, 14:25 UTC2h 45m
2026-07-21 ENT2ZU BUD → GDN Jul 21, 19:20 UTCJul 21, 19:30 UTC10m
2026-07-21 ENT2ZU BUD → GDN Jul 21, 16:20 UTCJul 21, 19:05 UTC2h 45m
2026-07-21 ENT2KG LPA → GDN Jul 21, 12:30 UTCJul 21, 14:50 UTC2h 20m
2026-07-21 ENT1BG KTW → HER Jul 21, 08:10 UTCJul 21, 11:10 UTC3h 0m
2026-07-21 ENT2BM BSL → RHO Jul 21, 04:15 UTCJul 21, 06:50 UTC2h 35m
2026-07-20 ENT6052 PRN → EAP Jul 20, 22:25 UTCJul 20, 22:50 UTC25m
2026-07-20 ENT6052 PRN → EAP Jul 20, 17:35 UTCJul 20, 19:20 UTC1h 45m
2026-07-20 ENT6051 EAP → PRN Jul 20, 14:55 UTCJul 20, 16:20 UTC1h 25m
2026-07-20 ENT2KD BSL → BSL Jul 20, 04:35 UTCJul 20, 13:30 UTC8h 55m
2026-07-19 ENT6GP - Jul 19, 18:45 UTCJul 19, 21:20 UTC2h 35m
2026-07-19 ENT4US - Jul 19, 15:10 UTCJul 19, 17:30 UTC2h 20m
2026-07-19 ENT4US - Jul 19, 14:50 UTCJul 19, 15:05 UTC15m
2026-07-19 ENT9FJ FCO → LEN Jul 19, 10:00 UTCJul 19, 13:30 UTC3h 30m
2026-07-19 ENT5GW WAW → GPA Jul 19, 04:35 UTCJul 19, 08:25 UTC3h 50m
2026-07-18 ENT3JX - Jul 18, 19:15 UTCJul 18, 22:40 UTC3h 25m
2026-07-18 ENT8CG - Jul 18, 14:10 UTCJul 18, 17:45 UTC3h 35m
2026-07-18 ENT5MK RHO → BSL Jul 18, 08:00 UTCJul 18, 11:10 UTC3h 10m
2026-07-18 ENT8DC BSL → RHO Jul 18, 04:20 UTCJul 18, 06:55 UTC2h 35m
2026-07-17 ENT6052 PRN → EAP Jul 17, 18:50 UTCJul 17, 20:40 UTC1h 50m
2026-07-17 ENT6051 EAP → PRN Jul 17, 16:00 UTCJul 17, 17:25 UTC1h 25m
2026-07-17 ENT7AH - Jul 17, 11:30 UTCJul 17, 14:39 UTC3h 10m
2026-07-17 ENT9KJ POZ → FUE Jul 17, 07:14 UTCJul 17, 09:45 UTC2h 30m
2026-07-16 ENT6RA - Jul 16, 10:45 UTCJul 16, 13:40 UTC2h 55m
2026-07-16 ENT8DF - Jul 16, 07:05 UTCJul 16, 09:20 UTC2h 15m
2026-07-15 ENT6052 - Jul 15, 18:30 UTCJul 15, 20:20 UTC1h 50m
2026-07-15 ENT6051 - Jul 15, 15:40 UTCJul 15, 17:15 UTC1h 35m
2026-07-15 ENT6TM - Jul 15, 11:30 UTCJul 15, 14:15 UTC2h 45m
2026-07-15 ENT2LM - Jul 15, 07:45 UTCJul 15, 10:10 UTC2h 25m
2026-07-14 ENT8NM - Jul 14, 16:15 UTCJul 14, 19:05 UTC2h 50m
2026-07-14 ENT7HF - Jul 14, 12:45 UTCJul 14, 15:05 UTC2h 20m
2026-07-14 ENT3EA - Jul 14, 08:30 UTCJul 14, 11:30 UTC3h 0m
2026-07-14 ENT4RC - Jul 14, 04:15 UTCJul 14, 06:55 UTC2h 40m
2026-07-13 ENT6052 - Jul 13, 17:10 UTCJul 13, 18:55 UTC1h 45m
2026-07-13 ENT6051 - Jul 13, 14:30 UTCJul 13, 16:00 UTC1h 30m
2026-07-13 ENT8KW - Jul 13, 04:30 UTCJul 13, 13:10 UTC8h 40m

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

Mode-S 4891B8 frequently asked

What is Mode-S code 4891B8?
4891B8 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-ENV.
Where is Mode-S 4891B8 registered?
Mode-S code 4891B8 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4891B8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4891B8, octal 22110670, decimal 4,755,896.
What flights does 4891B8 operate?
Mode-S 4891B8 has broadcast 20 distinct callsigns, including ENT6052, ENT6051, ENT7598, ENT501N, ENT8UY.