Apparatus

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sensors Mode-S transponder

4891AC

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-ENM · BOEING 737-800

Hex
4891AC
Octal
22110654
Decimal
4,755,884
Country
PL
Tail
SP-ENM
Type
B738
Broadcasting now · callsign ENT7547 · 2,350 ft
Flights observed
251
Distinct callsigns
20
Country
PL
Last broadcast
Jul 26, 22:25 UTC

Current position

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

Country allocation

The ICAO 24-bit address 4891AC 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
ENT4045 - 4 2026-07-16
ENT7756 - 3 2026-07-26
ENT7755 - 3 2026-07-26
ENT7742 - 3 2026-07-23
ENT7091 - 3 2026-05-27
ENT7064 - 3 2026-07-08
ENT5706 - 3 2026-07-13
ENT4435 - 3 2026-07-18
ENT7794 - 2 2026-07-25
ENT7765 - 2 2026-07-23
ENT7741 - 2 2026-07-09
ENT7339 - 2 2026-06-16
ENT7169 - 2 2026-05-23
ENT7158 - 2 2026-07-26
ENT7157 - 2 2026-07-26
ENT7092 - 2 2026-07-15
ENT7078 - 2 2026-07-17
ENT7077 - 2 2026-07-17
ENT7063 - 2 2026-07-08
ENT4LP DAT Enterprise Limited 2 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENT1713 POZ → AYT Jul 26, 19:50 UTCJul 26, 22:25 UTC2h 35m
2026-07-26 ENT7756 - Jul 26, 15:55 UTCJul 26, 18:50 UTC2h 55m
2026-07-26 ENT7157 - Jul 26, 12:00 UTCJul 26, 14:45 UTC2h 45m
2026-07-26 ENT7158 - Jul 26, 08:15 UTCJul 26, 11:05 UTC2h 50m
2026-07-26 ENT7755 - Jul 26, 04:15 UTCJul 26, 06:45 UTC2h 31m
2026-07-25 ENT7793 - Jul 25, 09:25 UTCJul 25, 12:40 UTC3h 15m
2026-07-25 ENT7794 - Jul 25, 04:40 UTCJul 25, 08:05 UTC3h 25m
2026-07-24 ENT8UX WMI → WAW Jul 24, 16:30 UTCJul 24, 19:00 UTC2h 30m
2026-07-24 ENT1512 - Jul 24, 07:20 UTCJul 24, 11:05 UTC3h 45m
2026-07-23 ENT1510 - Jul 23, 16:30 UTCJul 23, 19:05 UTC2h 35m
2026-07-23 ENT1509 - Jul 23, 12:55 UTCJul 23, 15:30 UTC2h 35m
2026-07-23 ENT7742 DJE → POZ Jul 23, 09:20 UTCJul 23, 12:00 UTC2h 40m
2026-07-23 ENT7765 - Jul 23, 04:45 UTCJul 23, 07:25 UTC2h 40m
2026-07-21 ENT4CA FUE → KTW Jul 21, 13:00 UTCJul 21, 15:05 UTC2h 5m
2026-07-21 ENT4910 - Jul 21, 04:45 UTCJul 21, 07:00 UTC2h 15m
2026-07-21 ENT4907 - Jul 21, 01:35 UTCJul 21, 03:30 UTC1h 55m
2026-07-20 ENT4LP CFU → POZ Jul 20, 20:45 UTCJul 20, 23:35 UTC2h 50m
2026-07-20 ENT6EK GDN → PMI Jul 20, 16:20 UTCJul 20, 19:45 UTC3h 25m
2026-07-20 ENT2BY POZ → RHO Jul 20, 10:20 UTCJul 20, 13:20 UTC3h 0m
2026-07-19 ENT4WD - Jul 19, 22:15 UTCJul 20, 00:50 UTC2h 35m
2026-07-19 ENT4997 GDN → BJV Jul 19, 06:15 UTCJul 19, 08:45 UTC2h 30m
2026-07-18 ENT1617 - Jul 18, 18:55 UTCJul 18, 22:30 UTC3h 35m
2026-07-18 ENT2MT SQQ → WAW Jul 18, 12:20 UTCJul 18, 14:30 UTC2h 10m
2026-07-18 ENT4435 - Jul 18, 04:05 UTCJul 18, 06:50 UTC2h 45m
2026-07-17 ENT7078 - Jul 17, 16:34 UTCJul 17, 19:09 UTC2h 35m
2026-07-17 ENT7077 - Jul 17, 12:55 UTCJul 17, 15:05 UTC2h 10m
2026-07-17 ENT4810 - Jul 17, 08:15 UTCJul 17, 11:15 UTC3h 0m
2026-07-17 ENT4809 - Jul 17, 02:39 UTCJul 17, 05:15 UTC2h 35m
2026-07-16 ENT4045 - Jul 16, 04:25 UTCJul 16, 08:05 UTC3h 40m
2026-07-15 ENT7092 - Jul 15, 16:05 UTCJul 15, 18:55 UTC2h 50m
2026-07-15 ENT7055 WAW → AYT Jul 15, 12:10 UTCJul 15, 14:55 UTC2h 45m
2026-07-14 ENT7495 - Jul 14, 09:30 UTCJul 14, 13:05 UTC3h 35m
2026-07-14 ENT4910 - Jul 14, 04:40 UTCJul 14, 06:55 UTC2h 15m
2026-07-14 ENT4907 - Jul 14, 01:35 UTCJul 14, 03:25 UTC1h 50m
2026-07-13 ENT5706 - Jul 13, 05:05 UTCJul 13, 23:50 UTC18h 45m
2026-07-13 ENT5706 - Jul 13, 03:05 UTCJul 13, 23:50 UTC20h 45m
2026-07-13 ENT5706 - Jul 13, 02:15 UTCJul 13, 23:50 UTC21h 35m
2026-07-12 ENT4178 - Jul 12, 18:40 UTCJul 12, 21:25 UTC2h 45m
2026-07-12 ENT4179 - Jul 12, 11:55 UTCJul 12, 18:35 UTC6h 40m
2026-07-12 ENT4177 - Jul 12, 00:30 UTCJul 12, 10:05 UTC9h 35m
2026-07-11 ENT4FG - Jul 11, 19:50 UTCJul 11, 21:50 UTC2h 0m
2026-07-11 ENT4275 - Jul 11, 08:30 UTCJul 11, 11:05 UTC2h 35m
2026-07-10 ENT4022 - Jul 10, 05:00 UTCJul 10, 12:55 UTC7h 55m
2026-07-09 ENT7741 - Jul 9, 12:35 UTCJul 9, 15:00 UTC2h 25m
2026-07-09 ENT7742 DJE → POZ Jul 9, 08:15 UTCJul 9, 11:15 UTC3h 0m
2026-07-08 ENT7064 - Jul 8, 20:55 UTCJul 8, 21:00 UTC5m
2026-07-08 ENT7064 - Jul 8, 17:55 UTCJul 8, 20:15 UTC2h 20m
2026-07-08 ENT7063 - Jul 8, 13:05 UTCJul 8, 15:55 UTC2h 50m
2026-07-08 ENT8BD - Jul 8, 09:05 UTCJul 8, 11:15 UTC2h 10m
2026-07-08 ENT1DM - Jul 8, 05:50 UTCJul 8, 07:55 UTC2h 5m

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

Mode-S 4891AC frequently asked

What is Mode-S code 4891AC?
4891AC is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-ENM.
Where is Mode-S 4891AC registered?
Mode-S code 4891AC is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4891AC broadcasting right now?
Yes. Mode-S 4891AC is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4891AC, octal 22110654, decimal 4,755,884.
What flights does 4891AC operate?
Mode-S 4891AC has broadcast 20 distinct callsigns, including ENT4045, ENT7756, ENT7755, ENT7742, ENT7091.