Apparatus

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sensors Mode-S transponder

4AB823

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-NAC · BOEING 737 MAX 8

Hex
4AB823
Octal
22534043
Decimal
4,896,803
Country
SE
Tail
SE-NAC
Type
B38M
Transponder active on ground
Flights observed
530
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S 4AB823.

Country allocation

The ICAO 24-bit address 4AB823 falls within the block assigned to Sweden (SE) by ICAO Annex 10, Volume III. Every aircraft registered in Sweden 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
NSZ9BP - 10 2026-06-28
NSZ5TQ Norwegian Air Sweden AOC 10 2026-06-28
NSZ5052 - 9 2026-06-24
NSZ5053 - 8 2026-06-24
NSZ6PY Norwegian Air Sweden AOC 7 2026-07-25
NSZ5074 - 7 2026-06-26
NSZ5070 - 7 2026-06-27
NSZ5051 - 7 2026-06-26
NSZ3646 Norwegian Air Sweden AOC 7 2026-07-20
NSZ80W - 6 2026-06-22
NSZ6LB - 6 2026-06-24
NSZ5TP Norwegian Air Sweden AOC 6 2026-07-20
NSZ5085 - 6 2026-06-22
NSZ5071 Norwegian Air Sweden AOC 6 2026-06-27
NSZ5023 - 6 2026-06-22
NSZ3640 Norwegian Air Sweden AOC 6 2026-07-26
NSZ3510 Norwegian Air Sweden AOC 6 2026-07-20
NSZ2TU - 6 2026-06-22
NSZ8KC Norwegian Air Sweden AOC 5 2026-05-15
NSZ4KP Norwegian Air Sweden AOC 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ3354 CPH → CHQ Jul 26, 21:00 UTCJul 26, 22:45 UTC1h 45m
2026-07-26 NSZ5GP OSL → CPH Jul 26, 18:30 UTCJul 26, 19:20 UTC50m
2026-07-26 NSZ6WT CPH → OSL Jul 26, 16:45 UTCJul 26, 17:40 UTC55m
2026-07-26 NSZ3295 TIV → CPH Jul 26, 10:45 UTCJul 26, 16:00 UTC5h 15m
2026-07-26 NSZ3641 NCE → CPH Jul 26, 07:35 UTCJul 26, 09:30 UTC1h 55m
2026-07-26 NSZ3640 CPH → NCE Jul 26, 04:30 UTCJul 26, 06:25 UTC1h 55m
2026-07-25 NSZ3353 CHQ → CPH Jul 25, 18:00 UTCJul 25, 21:10 UTC3h 10m
2026-07-25 NSZ3352 CPH → CHQ Jul 25, 13:55 UTCJul 25, 16:40 UTC2h 45m
2026-07-25 NSZ1KS AGP → CPH Jul 25, 09:00 UTCJul 25, 12:20 UTC3h 20m
2026-07-25 NSZ6PY CPH → AGP Jul 25, 04:25 UTCJul 25, 07:55 UTC3h 30m
2026-07-24 NSZ3613 OPO → CPH Jul 24, 18:25 UTCJul 24, 21:20 UTC2h 55m
2026-07-24 NSZ2EM CPH → CPH Jul 24, 14:05 UTCJul 24, 17:20 UTC3h 15m
2026-07-24 NSZ1KS AGP → CPH Jul 24, 09:50 UTCJul 24, 12:50 UTC3h 0m
2026-07-24 NSZ6PY CPH → AGP Jul 24, 05:00 UTCJul 24, 08:25 UTC3h 25m
2026-07-23 NSZ3527 MAN → CPH Jul 23, 20:10 UTCJul 23, 21:30 UTC1h 20m
2026-07-23 NSZ5GL CPH → MAN Jul 23, 17:30 UTCJul 23, 19:00 UTC1h 30m
2026-07-23 NSZ3751 BGY → CPH Jul 23, 14:35 UTCJul 23, 16:20 UTC1h 45m
2026-07-23 NSZ3750 CPH → BGY Jul 23, 11:45 UTCJul 23, 13:25 UTC1h 40m
2026-07-23 NSZ3637 CDG → CPH Jul 23, 09:00 UTCJul 23, 10:30 UTC1h 30m
2026-07-23 NSZ3636 CPH → CDG Jul 23, 06:15 UTCJul 23, 07:35 UTC1h 20m
2026-07-22 NSZ3519 LGW → CPH Jul 22, 18:30 UTCJul 22, 19:50 UTC1h 20m
2026-07-22 NSZ3518 CPH → LGW Jul 22, 15:55 UTCJul 22, 17:25 UTC1h 30m
2026-07-22 NSZ3MC - Jul 22, 13:30 UTCJul 22, 15:00 UTC1h 30m
2026-07-22 NSZ4EV HEI → LGW Jul 22, 11:10 UTCJul 22, 12:10 UTC1h 0m
2026-07-22 NSZ3640 CPH → NCE Jul 22, 04:40 UTCJul 22, 05:25 UTC45m
2026-07-21 NSZ3291 PRN → CPH Jul 21, 19:50 UTCJul 21, 22:00 UTC2h 10m
2026-07-21 NSZ3290 CPH → PRN Jul 21, 16:10 UTCJul 21, 18:15 UTC2h 5m
2026-07-21 NSZ5KA BUD → CPH Jul 21, 13:00 UTCJul 21, 14:35 UTC1h 35m
2026-07-21 NSZ3FZ CPH → BUD Jul 21, 10:35 UTCJul 21, 12:00 UTC1h 25m
2026-07-21 NSZ82ME DBV → CPH Jul 21, 07:10 UTCJul 21, 09:15 UTC2h 5m
2026-07-21 NSZ3280 CPH → DBV Jul 21, 04:20 UTCJul 21, 06:20 UTC2h 0m
2026-07-20 NSZ4KP NCE → CPH Jul 20, 20:05 UTCJul 20, 22:00 UTC1h 55m
2026-07-20 NSZ3646 CPH → NCE Jul 20, 17:00 UTCJul 20, 19:00 UTC2h 0m
2026-07-20 NSZ50TE EDI → CPH Jul 20, 14:25 UTCJul 20, 15:55 UTC1h 30m
2026-07-20 NSZ3502 CPH → EDI Jul 20, 11:55 UTCJul 20, 13:30 UTC1h 35m
2026-07-20 NSZ5TP LGW → CPH Jul 20, 09:25 UTCJul 20, 10:50 UTC1h 25m
2026-07-20 NSZ3510 CPH → LGW Jul 20, 06:10 UTCJul 20, 07:50 UTC1h 40m
2026-07-19 NSZ3309 MUC → CPH Jul 19, 20:45 UTCJul 19, 21:55 UTC1h 10m
2026-07-19 NSZ3308 CPH → MUC Jul 19, 18:25 UTCJul 19, 19:40 UTC1h 15m
2026-07-19 NSZ3563 KRK → CPH Jul 19, 16:25 UTCJul 19, 17:35 UTC1h 10m
2026-07-19 NSZ3562 - Jul 19, 13:20 UTCJul 19, 14:35 UTC1h 15m
2026-07-19 NSZ3613 OPO → CPH Jul 19, 09:25 UTCJul 19, 12:15 UTC2h 50m
2026-07-19 NSZ2EM CPH → OPO Jul 19, 05:10 UTCJul 19, 08:10 UTC3h 0m
2026-07-18 NSZ3TW AGP → CPH Jul 18, 17:15 UTCJul 18, 20:15 UTC3h 0m
2026-07-18 NSZ2BL CPH → AGP Jul 18, 12:30 UTCJul 18, 15:55 UTC3h 25m
2026-07-18 NSZ9EF NAP → CPH Jul 18, 08:25 UTCJul 18, 10:30 UTC2h 5m
2026-07-18 NSZ3738 CPH → NAP Jul 18, 04:10 UTCJul 18, 06:15 UTC2h 5m
2026-07-17 NSZ4KP - Jul 17, 20:40 UTCJul 17, 22:25 UTC1h 45m
2026-07-17 NSZ3646 CPH → NCE Jul 17, 17:20 UTCJul 17, 19:25 UTC2h 5m
2026-07-17 NSZ50TE EDI → CPH Jul 17, 14:39 UTCJul 17, 16:10 UTC1h 30m

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 SE-NAC page for operator, model, and routing details .

Mode-S 4AB823 frequently asked

What is Mode-S code 4AB823?
4AB823 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-NAC.
Where is Mode-S 4AB823 registered?
Mode-S code 4AB823 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AB823 broadcasting right now?
Mode-S 4AB823 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AB823, octal 22534043, decimal 4,896,803.
What flights does 4AB823 operate?
Mode-S 4AB823 has broadcast 20 distinct callsigns, including NSZ9BP, NSZ5TQ, NSZ5052, NSZ5053, NSZ6PY.