Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BF20

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

Currently assigned to HL7720 · AIRBUS A-330-300

Hex
71BF20
Octal
34337440
Decimal
7,454,496
Country
KR
Tail
HL7720
Type
A333
Broadcasting now · callsign KAL1244 · 21,000 ft
Flights observed
200
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 12:25 UTC

Current position

71BF20 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71BF20 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 20 distinct

Callsign Airline Flights Last seen
KAL2118 Korean Air 44 2026-07-26
KAL2117 Korean Air 44 2026-07-26
KAL2057 Korean Air 39 2026-07-26
KAL2058 Korean Air 18 2026-07-23
KAL2106 Korean Air 4 2026-06-11
KAL2027 Korean Air 4 2026-06-04
KAL2105 Korean Air 3 2026-06-10
KAL2028 Korean Air 3 2026-06-04
KAL1312 Korean Air 3 2026-06-11
KAL1246 Korean Air 3 2026-06-10
KAL1244 Korean Air 3 2026-06-11
KAL1188 Korean Air 3 2026-06-10
KAL1177 Korean Air 3 2026-06-11
KAL1121 Korean Air 3 2026-06-10
KAL1113 Korean Air 3 2026-06-11
KAL1055 Korean Air 3 2026-06-10
KAL864 Korean Air 2 2026-06-05
KAL2011 Korean Air 2 2026-06-03
KAL887 Korean Air 1 2026-06-03
KAL882 Korean Air 1 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL2057 GMP → SHA Jul 26, 07:05 UTCJul 26, 12:20 UTC5h 15m
2026-07-26 KAL2118 KIX → GMP Jul 26, 03:45 UTCJul 26, 05:05 UTC1h 20m
2026-07-26 KAL2117 GMP → KIX Jul 26, 00:25 UTCJul 26, 01:40 UTC1h 15m
2026-07-25 KAL2057 GMP → SHA Jul 25, 07:15 UTCJul 25, 12:20 UTC5h 5m
2026-07-25 KAL2118 KIX → GMP Jul 25, 03:55 UTCJul 25, 05:10 UTC1h 15m
2026-07-25 KAL2117 GMP → KIX Jul 25, 00:30 UTCJul 25, 01:55 UTC1h 25m
2026-07-24 KAL2057 GMP → SHA Jul 24, 07:50 UTCJul 24, 12:50 UTC5h 0m
2026-07-24 KAL2118 KIX → GMP Jul 24, 04:20 UTCJul 24, 05:40 UTC1h 20m
2026-07-24 KAL2117 GMP → KIX Jul 24, 00:50 UTCJul 24, 02:10 UTC1h 20m
2026-07-23 KAL2058 SHA → GMP Jul 23, 07:20 UTCJul 23, 12:45 UTC5h 25m
2026-07-23 KAL2118 KIX → GMP Jul 23, 03:50 UTCJul 23, 05:10 UTC1h 20m
2026-07-23 KAL2117 GMP → KIX Jul 23, 00:45 UTCJul 23, 02:00 UTC1h 15m
2026-07-22 KAL2058 SHA → GMP Jul 22, 13:05 UTCJul 22, 13:50 UTC45m
2026-07-22 KAL2118 KIX → GMP Jul 22, 03:45 UTCJul 22, 05:10 UTC1h 25m
2026-07-22 KAL2117 GMP → KIX Jul 22, 00:35 UTCJul 22, 02:00 UTC1h 25m
2026-07-21 KAL2057 GMP → GMP Jul 21, 07:15 UTCJul 21, 12:25 UTC5h 10m
2026-07-21 KAL2118 KIX → GMP Jul 21, 03:55 UTCJul 21, 05:15 UTC1h 20m
2026-07-21 KAL2117 GMP → KIX Jul 21, 00:30 UTCJul 21, 01:55 UTC1h 25m
2026-07-20 KAL2057 GMP → GMP Jul 20, 07:20 UTCJul 20, 12:35 UTC5h 15m
2026-07-20 KAL2118 KIX → GMP Jul 20, 03:45 UTCJul 20, 05:05 UTC1h 20m
2026-07-20 KAL2117 GMP → KIX Jul 20, 00:35 UTCJul 20, 01:55 UTC1h 20m
2026-07-19 KAL2057 GMP → GMP Jul 19, 07:10 UTCJul 19, 13:20 UTC6h 10m
2026-07-19 KAL2118 KIX → GMP Jul 19, 04:00 UTCJul 19, 05:10 UTC1h 10m
2026-07-19 KAL2117 GMP → KIX Jul 19, 00:25 UTCJul 19, 01:45 UTC1h 20m
2026-07-18 KAL2057 GMP → GMP Jul 18, 07:20 UTCJul 18, 12:35 UTC5h 15m
2026-07-18 KAL2118 KIX → GMP Jul 18, 03:50 UTCJul 18, 05:10 UTC1h 20m
2026-07-18 KAL2117 GMP → KIX Jul 18, 00:35 UTCJul 18, 01:54 UTC1h 20m
2026-07-17 KAL2058 SHA → GMP Jul 17, 11:50 UTCJul 17, 12:30 UTC40m
2026-07-17 KAL2057 - Jul 17, 07:14 UTCJul 17, 08:00 UTC45m
2026-07-17 KAL2118 - Jul 17, 03:55 UTCJul 17, 05:04 UTC1h 10m
2026-07-17 KAL2117 GMP → KIX Jul 17, 00:45 UTCJul 17, 02:05 UTC1h 20m
2026-07-16 KAL2057 GMP → GMP Jul 16, 07:15 UTCJul 16, 12:14 UTC5h 0m
2026-07-16 KAL2118 - Jul 16, 03:55 UTCJul 16, 05:10 UTC1h 15m
2026-07-16 KAL2117 GMP → KIX Jul 16, 00:35 UTCJul 16, 01:50 UTC1h 15m
2026-07-15 KAL2058 SHA → GMP Jul 15, 11:40 UTCJul 15, 12:15 UTC35m
2026-07-15 KAL2057 - Jul 15, 07:15 UTCJul 15, 08:05 UTC50m
2026-07-15 KAL2118 - Jul 15, 03:50 UTCJul 15, 05:05 UTC1h 15m
2026-07-15 KAL2117 GMP → KIX Jul 15, 00:35 UTCJul 15, 01:55 UTC1h 20m
2026-07-14 KAL2058 SHA → GMP Jul 14, 07:15 UTCJul 14, 13:05 UTC5h 50m
2026-07-14 KAL2118 KIX → GMP Jul 14, 03:35 UTCJul 14, 04:50 UTC1h 15m
2026-07-14 KAL2117 GMP → KIX Jul 14, 00:20 UTCJul 14, 01:40 UTC1h 20m
2026-07-13 KAL2057 GMP → GMP Jul 13, 07:15 UTCJul 13, 12:25 UTC5h 10m
2026-07-13 KAL2118 - Jul 13, 03:50 UTCJul 13, 05:05 UTC1h 15m
2026-07-13 KAL2117 GMP → KIX Jul 13, 00:30 UTCJul 13, 01:50 UTC1h 20m
2026-07-12 KAL2058 SHA → GMP Jul 12, 12:05 UTCJul 12, 12:40 UTC35m
2026-07-12 KAL2057 - Jul 12, 07:05 UTCJul 12, 07:50 UTC45m
2026-07-12 KAL2118 - Jul 12, 03:50 UTCJul 12, 05:10 UTC1h 20m
2026-07-12 KAL2117 GMP → KIX Jul 12, 00:40 UTCJul 12, 01:55 UTC1h 15m
2026-07-11 KAL2057 GMP → GMP Jul 11, 07:10 UTCJul 11, 12:05 UTC4h 55m
2026-07-11 KAL2118 KIX → GMP Jul 11, 03:55 UTCJul 11, 05:10 UTC1h 15m

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 HL7720 page for operator, model, and routing details .

Mode-S 71BF20 frequently asked

What is Mode-S code 71BF20?
71BF20 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7720.
Where is Mode-S 71BF20 registered?
Mode-S code 71BF20 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 71BF20 broadcasting right now?
Yes. Mode-S 71BF20 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF20, octal 34337440, decimal 7,454,496.
What flights does 71BF20 operate?
Mode-S 71BF20 has broadcast 20 distinct callsigns, including KAL2118, KAL2117, KAL2057, KAL2058, KAL2106.