Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4891AD

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-ENN · BOEING 737-800

Hex
4891AD
Octal
22110655
Decimal
4,755,885
Country
PL
Tail
SP-ENN
Type
B738
No current signal · last broadcast 8h ago
Flights observed
202
Distinct callsigns
20
Country
PL
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 4891AD.

Country allocation

The ICAO 24-bit address 4891AD 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
ENT444 - 7 2026-07-17
ENT443 DAT Enterprise Limited 7 2026-07-17
ENT440 - 7 2026-07-16
ENT439 - 7 2026-07-16
ENT438 - 7 2026-07-15
ENT404 - 7 2026-07-14
ENT448 - 6 2026-07-11
ENT437 - 6 2026-07-15
ENT432 - 6 2026-07-13
ENT431 - 6 2026-07-13
ENT428 - 6 2026-07-12
ENT403 - 6 2026-07-14
ENT447 - 5 2026-07-11
ENT430 - 5 2026-07-12
ENT429 - 5 2026-07-12
ENT7061 - 4 2026-05-23
ENT427 - 4 2026-07-12
ENT1047 - 4 2026-05-23
ENT7062 - 3 2026-05-23
ENT7033 DAT Enterprise Limited 3 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 ENT444 - Jul 17, 14:04 UTCJul 17, 17:35 UTC3h 30m
2026-07-17 ENT443 LGW → LGW Jul 17, 09:10 UTCJul 17, 12:04 UTC2h 55m
2026-07-16 ENT440 MLA → LGW Jul 16, 13:54 UTCJul 16, 16:49 UTC2h 55m
2026-07-16 ENT439 LGW → MLA Jul 16, 09:40 UTCJul 16, 12:20 UTC2h 40m
2026-07-15 ENT438 MJT → LGW Jul 15, 13:40 UTCJul 15, 17:25 UTC3h 45m
2026-07-15 ENT437 LGW → MJT Jul 15, 09:15 UTCJul 15, 12:20 UTC3h 5m
2026-07-14 ENT404 - Jul 14, 15:10 UTCJul 14, 17:20 UTC2h 10m
2026-07-14 ENT403 - Jul 14, 12:00 UTCJul 14, 13:40 UTC1h 40m
2026-07-13 ENT432 - Jul 13, 13:05 UTCJul 13, 16:25 UTC3h 20m
2026-07-13 ENT431 - Jul 13, 08:45 UTCJul 13, 11:05 UTC2h 20m
2026-07-12 ENT430 PVK → LGW Jul 12, 18:55 UTCJul 12, 21:55 UTC3h 0m
2026-07-12 ENT429 LGW → PVK Jul 12, 14:55 UTCJul 12, 17:35 UTC2h 40m
2026-07-12 ENT428 PVK → LGW Jul 12, 10:20 UTCJul 12, 13:20 UTC3h 0m
2026-07-12 ENT427 LGW → PVK Jul 12, 06:15 UTCJul 12, 09:00 UTC2h 45m
2026-07-11 ENT448 - Jul 11, 13:35 UTCJul 11, 16:30 UTC2h 55m
2026-07-11 ENT447 - Jul 11, 09:40 UTCJul 11, 12:20 UTC2h 40m
2026-07-10 ENT444 - Jul 10, 14:10 UTCJul 10, 17:30 UTC3h 20m
2026-07-10 ENT443 - Jul 10, 09:25 UTCJul 10, 12:15 UTC2h 50m
2026-07-09 ENT440 MLA → LGW Jul 9, 13:50 UTCJul 9, 16:40 UTC2h 50m
2026-07-09 ENT439 LGW → MLA Jul 9, 09:25 UTCJul 9, 12:10 UTC2h 45m
2026-07-08 ENT438 MJT → LGW Jul 8, 13:05 UTCJul 8, 17:05 UTC4h 0m
2026-07-08 ENT437 - Jul 8, 08:35 UTCJul 8, 11:45 UTC3h 10m
2026-07-07 ENT404 - Jul 7, 15:10 UTCJul 7, 17:10 UTC2h 0m
2026-07-07 ENT403 - Jul 7, 11:45 UTCJul 7, 13:30 UTC1h 45m
2026-07-06 ENT432 - Jul 6, 13:10 UTCJul 6, 16:00 UTC2h 50m
2026-07-06 ENT431 - Jul 6, 08:45 UTCJul 6, 11:05 UTC2h 20m
2026-07-05 ENT430 LGW → LGW Jul 5, 15:05 UTCJul 5, 22:20 UTC7h 15m
2026-07-05 ENT428 LGW → LGW Jul 5, 06:15 UTCJul 5, 13:30 UTC7h 15m
2026-07-04 ENT448 RHO → LGW Jul 4, 13:50 UTCJul 4, 16:40 UTC2h 50m
2026-07-04 ENT447 LGW → RHO Jul 4, 09:45 UTCJul 4, 12:05 UTC2h 20m
2026-07-03 ENT444 - Jul 3, 14:05 UTCJul 3, 17:40 UTC3h 35m
2026-07-03 ENT443 - Jul 3, 09:05 UTCJul 3, 12:00 UTC2h 55m
2026-07-02 ENT440 LXS → LGW Jul 2, 13:50 UTCJul 2, 16:45 UTC2h 55m
2026-07-02 ENT439 LGW → MLA Jul 2, 09:25 UTCJul 2, 12:10 UTC2h 45m
2026-07-01 ENT438 - Jul 1, 13:50 UTCJul 1, 17:15 UTC3h 25m
2026-07-01 ENT437 LGW → MJT Jul 1, 09:50 UTCJul 1, 13:00 UTC3h 10m
2026-06-30 ENT404 - Jun 30, 15:00 UTCJun 30, 17:05 UTC2h 5m
2026-06-30 ENT403 - Jun 30, 11:40 UTCJun 30, 13:40 UTC2h 0m
2026-06-29 ENT432 - Jun 29, 13:19 UTCJun 29, 16:00 UTC2h 40m
2026-06-29 ENT431 - Jun 29, 08:35 UTCJun 29, 11:14 UTC2h 40m
2026-06-28 ENT430 - Jun 28, 20:54 UTCJun 28, 23:25 UTC2h 30m
2026-06-28 ENT429 - Jun 28, 16:19 UTCJun 28, 18:55 UTC2h 35m
2026-06-28 ENT428 - Jun 28, 11:45 UTCJun 28, 14:50 UTC3h 5m
2026-06-28 ENT427 LGW → PVK Jun 28, 06:55 UTCJun 28, 09:39 UTC2h 45m
2026-06-27 ENT448 RHO → LGW Jun 27, 16:14 UTCJun 27, 18:54 UTC2h 40m
2026-06-27 ENT447 LGW → RHO Jun 27, 11:20 UTCJun 27, 14:00 UTC2h 40m
2026-06-26 ENT444 - Jun 26, 14:05 UTCJun 26, 17:15 UTC3h 10m
2026-06-26 ENT443 - Jun 26, 09:14 UTCJun 26, 12:19 UTC3h 5m
2026-06-25 ENT440 LXS → LGW Jun 25, 13:59 UTCJun 25, 16:55 UTC2h 55m
2026-06-25 ENT439 LGW → MLA Jun 25, 09:55 UTCJun 25, 12:44 UTC2h 50m

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

Mode-S 4891AD frequently asked

What is Mode-S code 4891AD?
4891AD is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-ENN.
Where is Mode-S 4891AD registered?
Mode-S code 4891AD is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4891AD broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4891AD, octal 22110655, decimal 4,755,885.
What flights does 4891AD operate?
Mode-S 4891AD has broadcast 20 distinct callsigns, including ENT444, ENT443, ENT440, ENT439, ENT438.