Apparatus

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sensors Mode-S transponder

71AA64

ICAO 24-bit transponder address · allocated to Korea, South

Currently assigned to HL5264 · ATR-72-600

Hex
71AA64
Octal
34325144
Decimal
7,449,188
Country
KR
Tail
HL5264
Type
AT76
Broadcasting now · callsign XUM2593 · 13,225 ft
Flights observed
710
Distinct callsigns
14
Country
KR
Last broadcast
1h ago

Current position

71AA64 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71AA64 falls within the block assigned to Korea, South (KR) by ICAO Annex 10, Volume III. Every aircraft registered in Korea, South 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 14 distinct

Callsign Airline Flights Last seen
XUM2597 - 91 2026-07-13
XUM2595 - 90 2026-07-13
XUM2596 - 89 2026-07-13
XUM2594 - 89 2026-07-13
XUM2598 - 88 2026-07-13
XUM2593 - 86 2026-07-13
XUM2592 - 86 2026-07-14
XUM2591 - 85 2026-07-13
XUMM2596 - 1 2026-07-05
XUM101T - 1 2026-05-27
XU2598 - 1 2026-06-19
XU2597 - 1 2026-06-20
XU2596 - 1 2026-06-19
XMU2598 - 1 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 XUM2592 - Jul 14, 00:15 UTCJul 14, 01:00 UTC45m
2026-07-13 XUM2591 - Jul 13, 22:35 UTCJul 13, 23:20 UTC45m
2026-07-13 XUM2598 - Jul 13, 10:45 UTCJul 13, 11:30 UTC45m
2026-07-13 XUM2597 - Jul 13, 08:55 UTCJul 13, 09:45 UTC50m
2026-07-13 XUM2596 - Jul 13, 07:30 UTCJul 13, 08:15 UTC45m
2026-07-13 XUM2595 - Jul 13, 05:45 UTCJul 13, 06:35 UTC50m
2026-07-13 XUM2594 - Jul 13, 04:10 UTCJul 13, 05:01 UTC50m
2026-07-13 XUM2593 - Jul 13, 02:10 UTCJul 13, 03:10 UTC1h 0m
2026-07-13 XUM2592 - Jul 13, 00:15 UTCJul 13, 01:01 UTC45m
2026-07-12 XUM2591 - Jul 12, 22:30 UTCJul 12, 23:15 UTC45m
2026-07-12 XUM2598 - Jul 12, 10:40 UTCJul 12, 11:20 UTC40m
2026-07-12 XUM2597 - Jul 12, 09:05 UTCJul 12, 09:55 UTC50m
2026-07-12 XUM2596 - Jul 12, 07:15 UTCJul 12, 08:01 UTC45m
2026-07-12 XUM2595 - Jul 12, 05:30 UTCJul 12, 06:15 UTC45m
2026-07-12 XUM2594 - Jul 12, 03:40 UTCJul 12, 04:20 UTC40m
2026-07-12 XUM2593 - Jul 12, 02:01 UTCJul 12, 02:45 UTC45m
2026-07-12 XUM2592 - Jul 12, 00:10 UTCJul 12, 00:55 UTC45m
2026-07-11 XUM2591 - Jul 11, 22:20 UTCJul 11, 23:05 UTC45m
2026-07-11 XUM2598 - Jul 11, 10:45 UTCJul 11, 11:20 UTC35m
2026-07-11 XUM2597 - Jul 11, 09:05 UTCJul 11, 09:50 UTC45m
2026-07-11 XUM2596 - Jul 11, 07:15 UTCJul 11, 07:55 UTC40m
2026-07-11 XUM2595 - Jul 11, 05:35 UTCJul 11, 06:20 UTC45m
2026-07-11 XUM2594 - Jul 11, 03:45 UTCJul 11, 04:20 UTC35m
2026-07-11 XUM2593 - Jul 11, 02:05 UTCJul 11, 02:50 UTC45m
2026-07-11 XUM2592 - Jul 11, 00:15 UTCJul 11, 01:10 UTC55m
2026-07-10 XUM2591 - Jul 10, 22:30 UTCJul 10, 23:10 UTC40m
2026-07-10 XUM2598 - Jul 10, 10:40 UTCJul 10, 11:30 UTC50m
2026-07-10 XUM2597 - Jul 10, 09:05 UTCJul 10, 09:50 UTC45m
2026-07-10 XUM2596 - Jul 10, 07:35 UTCJul 10, 08:25 UTC50m
2026-07-10 XUM2595 - Jul 10, 05:40 UTCJul 10, 06:30 UTC50m
2026-07-10 XUM2594 - Jul 10, 03:45 UTCJul 10, 04:35 UTC50m
2026-07-10 XUM2593 - Jul 10, 02:05 UTCJul 10, 02:50 UTC45m
2026-07-10 XUM2592 - Jul 10, 00:20 UTCJul 10, 01:10 UTC50m
2026-07-09 XUM2591 - Jul 9, 22:25 UTCJul 9, 23:10 UTC45m
2026-07-09 XUM2598 - Jul 9, 10:55 UTCJul 9, 11:50 UTC55m
2026-07-09 XUM2597 - Jul 9, 09:10 UTCJul 9, 09:50 UTC40m
2026-07-09 XUM2596 - Jul 9, 07:30 UTCJul 9, 08:25 UTC55m
2026-07-09 XUM2595 - Jul 9, 06:00 UTCJul 9, 06:40 UTC40m
2026-07-09 XUM2594 - Jul 9, 04:15 UTCJul 9, 05:10 UTC55m
2026-07-09 XUM2593 - Jul 9, 02:35 UTCJul 9, 03:20 UTC45m
2026-07-09 XUM2592 - Jul 9, 00:35 UTCJul 9, 01:25 UTC50m
2026-07-08 XUM2591 - Jul 8, 22:55 UTCJul 8, 23:35 UTC40m
2026-07-08 XUM2598 - Jul 8, 10:45 UTCJul 8, 11:35 UTC50m
2026-07-08 XUM2597 - Jul 8, 09:00 UTCJul 8, 09:50 UTC50m
2026-07-08 XUM2596 - Jul 8, 07:20 UTCJul 8, 08:05 UTC45m
2026-07-08 XUM2595 - Jul 8, 05:30 UTCJul 8, 06:20 UTC50m
2026-07-08 XUM2594 - Jul 8, 03:45 UTCJul 8, 04:35 UTC50m
2026-07-08 XUM2593 - Jul 8, 02:00 UTCJul 8, 02:50 UTC50m
2026-07-08 XUM2592 - Jul 8, 00:10 UTCJul 8, 01:00 UTC50m
2026-07-07 XUM2591 - Jul 7, 22:35 UTCJul 7, 23:20 UTC45m

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 HL5264 page for operator, model, and routing details .

Mode-S 71AA64 frequently asked

What is Mode-S code 71AA64?
71AA64 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL5264.
Where is Mode-S 71AA64 registered?
Mode-S code 71AA64 is allocated to Korea, South (KR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 71AA64 broadcasting right now?
Yes. Mode-S 71AA64 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71AA64, octal 34325144, decimal 7,449,188.
What flights does 71AA64 operate?
Mode-S 71AA64 has broadcast 14 distinct callsigns, including XUM2597, XUM2595, XUM2596, XUM2594, XUM2598.