Apparatus

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sensors Mode-S transponder

4891A6

ICAO 24-bit transponder address · allocated to Poland

Currently assigned to SP-ENG · BOEING 737-800

Hex
4891A6
Octal
22110646
Decimal
4,755,878
Country
PL
Tail
SP-ENG
Type
B738
Broadcasting now · callsign ENT7760 · 38,000 ft
Flights observed
180
Distinct callsigns
20
Country
PL
Last broadcast
45m ago

Current position

4891A6 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4891A6 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
ENT8EP - 2 2026-06-26
ENT7398 - 2 2026-07-09
ENT5MN - 2 2026-06-27
ENT597P - 2 2026-04-17
ENT5706 - 2 2026-06-29
ENT4864 - 2 2026-07-10
ENT4792 - 2 2026-07-10
ENT3BP - 2 2026-06-27
ENT2XF - 2 2026-05-12
ENT2WY - 2 2026-04-15
ENT1MB - 2 2026-04-17
ENT1BU - 2 2026-05-01
ENT9ZJ - 1 2026-06-28
ENT9YS - 1 2026-05-10
ENT9XD - 1 2026-06-14
ENT9PM - 1 2026-07-12
ENT9LX - 1 2026-05-11
ENT9JW - 1 2026-07-06
ENT9HJ - 1 2026-05-10
ENT9GY - 1 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 ENT7760 - Jul 18, 05:55 UTCJul 18, 07:30 UTC1h 35m
2026-07-18 ENT7759 - Jul 18, 02:05 UTCJul 18, 04:45 UTC2h 41m
2026-07-17 ENT1NZ - Jul 17, 21:25 UTCJul 18, 00:19 UTC2h 55m
2026-07-17 ENT7TP - Jul 17, 17:30 UTCJul 17, 19:45 UTC2h 15m
2026-07-17 ENT1042 - Jul 17, 13:29 UTCJul 17, 16:24 UTC2h 55m
2026-07-17 ENT1041 - Jul 17, 08:04 UTCJul 17, 11:35 UTC3h 30m
2026-07-17 ENT3CB - Jul 17, 04:04 UTCJul 17, 06:05 UTC2h 0m
2026-07-17 ENT4EC RZE → CDG Jul 17, 00:50 UTCJul 17, 02:50 UTC2h 0m
2026-07-16 ENT4184 - Jul 16, 04:05 UTCJul 16, 06:35 UTC2h 30m
2026-07-16 ENT4183 - Jul 16, 00:35 UTCJul 16, 02:50 UTC2h 15m
2026-07-15 ENT1354 - Jul 15, 18:40 UTCJul 15, 21:05 UTC2h 25m
2026-07-15 ENT1355 - Jul 15, 14:45 UTCJul 15, 17:10 UTC2h 25m
2026-07-15 ENT1356 - Jul 15, 10:25 UTCJul 15, 13:05 UTC2h 40m
2026-07-15 ENT7033 - Jul 15, 07:00 UTCJul 15, 09:10 UTC2h 10m
2026-07-15 ENT7034 - Jul 15, 01:50 UTCJul 15, 04:10 UTC2h 20m
2026-07-14 ENT1353 - Jul 14, 22:20 UTCJul 15, 00:35 UTC2h 14m
2026-07-14 ENT7320 - Jul 14, 08:05 UTCJul 14, 16:15 UTC8h 10m
2026-07-14 ENT5NJ - Jul 14, 06:40 UTCJul 14, 07:05 UTC25m
2026-07-14 ENT221 - Jul 14, 01:55 UTCJul 14, 05:30 UTC3h 35m
2026-07-13 ENT220 KTW → TLV Jul 13, 20:50 UTCJul 13, 23:55 UTC3h 5m
2026-07-13 ENT1342 - Jul 13, 11:55 UTCJul 13, 14:05 UTC2h 10m
2026-07-13 ENT1343 - Jul 13, 08:10 UTCJul 13, 10:45 UTC2h 35m
2026-07-13 ENT1344 - Jul 13, 04:15 UTCJul 13, 07:01 UTC2h 45m
2026-07-13 ENT1341 - Jul 13, 00:10 UTCJul 13, 02:25 UTC2h 15m
2026-07-12 ENT6GY - Jul 12, 19:50 UTCJul 12, 21:50 UTC2h 0m
2026-07-12 ENT2SA - Jul 12, 16:35 UTCJul 12, 18:30 UTC1h 55m
2026-07-12 ENT9PM - Jul 12, 11:35 UTCJul 12, 13:05 UTC1h 30m
2026-07-12 ENT3RT - Jul 12, 08:55 UTCJul 12, 10:20 UTC1h 25m
2026-07-11 ENT3MF - Jul 11, 03:30 UTCJul 11, 05:50 UTC2h 20m
2026-07-11 ENT3WX - Jul 11, 00:10 UTCJul 11, 02:20 UTC2h 10m
2026-07-10 ENT4864 - Jul 10, 19:20 UTCJul 10, 22:50 UTC3h 30m
2026-07-10 ENT4863 - Jul 10, 14:25 UTCJul 10, 17:45 UTC3h 20m
2026-07-10 ENT4792 - Jul 10, 01:30 UTCJul 10, 10:50 UTC9h 20m
2026-07-09 ENT7398 - Jul 9, 13:10 UTCJul 9, 15:45 UTC2h 35m
2026-07-09 ENT7095 WRO → DJE Jul 9, 09:25 UTCJul 9, 12:00 UTC2h 35m
2026-07-07 ENT5160 POZ → WRO Jul 7, 16:10 UTCJul 8, 02:20 UTC10h 10m
2026-07-07 ENT4996 - Jul 7, 10:35 UTCJul 7, 13:00 UTC2h 25m
2026-07-07 ENT4107 - Jul 7, 07:10 UTCJul 7, 09:25 UTC2h 15m
2026-07-07 ENT4108 - Jul 7, 02:50 UTCJul 7, 05:45 UTC2h 55m
2026-07-06 ENT4995 - Jul 6, 23:10 UTCJul 7, 01:20 UTC2h 10m
2026-07-06 ENT5JB - Jul 6, 14:20 UTCJul 6, 19:10 UTC4h 50m
2026-07-06 ENT9JW - Jul 6, 08:00 UTCJul 6, 12:55 UTC4h 55m
2026-07-06 ENT4018 - Jul 6, 03:55 UTCJul 6, 06:25 UTC2h 30m
2026-07-06 ENT4017 POZ → NBE Jul 6, 00:10 UTCJul 6, 02:40 UTC2h 30m
2026-07-05 ENT4012 - Jul 5, 16:20 UTCJul 5, 19:05 UTC2h 45m
2026-07-05 ENT4011 POZ → AYT Jul 5, 12:15 UTCJul 5, 14:50 UTC2h 35m
2026-07-05 ENT5772 - Jul 5, 09:40 UTCJul 5, 11:15 UTC1h 35m
2026-07-05 ENT5771 - Jul 5, 06:15 UTCJul 5, 07:40 UTC1h 25m
2026-07-05 ENT1UF - Jul 5, 02:05 UTCJul 5, 04:50 UTC2h 45m
2026-07-04 ENT5PZ - Jul 4, 22:35 UTCJul 5, 01:00 UTC2h 25m

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

Mode-S 4891A6 frequently asked

What is Mode-S code 4891A6?
4891A6 is an ICAO 24-bit transponder address. Allocated to Poland. Assigned to SP-ENG.
Where is Mode-S 4891A6 registered?
Mode-S code 4891A6 is allocated to Poland (PL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4891A6 broadcasting right now?
Yes. Mode-S 4891A6 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4891A6, octal 22110646, decimal 4,755,878.
What flights does 4891A6 operate?
Mode-S 4891A6 has broadcast 20 distinct callsigns, including ENT8EP, ENT7398, ENT5MN, ENT597P, ENT5706.