sensors Mode-S transponder

600B21

ICAO 24-bit transponder address · allocated to Azerbaijan

Currently assigned to 4K-SW888 · BOEING 747-400

Hex
600B21
Octal
30005441
Decimal
6,294,305
Country
AZ
Tail
4K-SW888
Type
B744
Broadcasting now · callsign AZG9491 · 40,000 ft
Flights observed
98
Distinct callsigns
20
Country
AZ
Last broadcast
4h ago

Current position

600B21 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 600B21 falls within the block assigned to Azerbaijan (AZ) by ICAO Annex 10, Volume III. Every aircraft registered in Azerbaijan 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
AZG7733 - 7 2026-04-14
AZG6889 Sakaviaservice 7 2026-04-15
AZG3941 - 7 2026-04-18
AZG3942 - 5 2026-04-18
AZG9492 Sakaviaservice 3 2026-05-26
AZG572 Sakaviaservice 3 2026-04-20
AZG393 Sakaviaservice 3 2026-05-17
AZG3236 Sakaviaservice 3 2026-04-17
AZG1922 Sakaviaservice 3 2026-05-15
AZG9491 Sakaviaservice 2 2026-05-29
AZG692 Sakaviaservice 2 2026-05-15
AZG4882 Sakaviaservice 2 2026-05-19
AZG423 Sakaviaservice 2 2026-04-18
AZG394 Sakaviaservice 2 2026-05-17
AZG3234 Sakaviaservice 2 2026-05-28
AZG3233 - 2 2026-05-27
AZG3039 - 2 2026-05-11
AZG247 Sakaviaservice 2 2026-05-27
AZG246 Sakaviaservice 2 2026-05-27
AZG231 Sakaviaservice 2 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AZG9491 HHN → LAX May 29, 17:50 UTCMay 29, 20:55 UTC3h 5m
2026-05-29 AZG231 VIE → HHN May 29, 10:40 UTCMay 29, 15:00 UTC4h 20m
2026-05-28 AZG3234 HHN → GYD May 28, 05:25 UTCMay 28, 09:05 UTC3h 40m
2026-05-27 AZG3233 - May 27, 22:20 UTCMay 28, 02:30 UTC4h 10m
2026-05-27 AZG247 HKG → HKG May 27, 10:05 UTCMay 27, 10:20 UTC15m
2026-05-27 AZG246 KGF → HKG May 27, 07:40 UTCMay 27, 07:55 UTC15m
2026-05-26 AZG9493 - May 26, 11:44 UTCMay 27, 05:45 UTC18h 0m
2026-05-26 AZG9492 LAX → KEF May 26, 01:20 UTCMay 26, 14:20 UTC13h 0m
2026-05-25 AZG9492 LAX → KEF May 25, 22:49 UTCMay 26, 01:14 UTC2h 25m
2026-05-25 AZG9492 LAX → KEF May 25, 12:55 UTCMay 25, 20:55 UTC7h 59m
2026-05-24 AZG9491 HHN → LAX May 24, 23:00 UTCMay 25, 09:35 UTC10h 35m
2026-05-24 AZG3238 HHN → GYD May 24, 07:15 UTCMay 24, 19:25 UTC12h 10m
2026-05-23 AZG998 MAD → GYD May 23, 11:05 UTCMay 23, 23:55 UTC12h 51m
2026-05-22 AZG997 - May 22, 16:45 UTCMay 23, 05:15 UTC12h 29m
2026-05-21 AZG1573 - May 21, 19:50 UTCMay 22, 13:10 UTC17h 20m
2026-05-20 AZG247 HKG → HKG May 20, 08:45 UTCMay 20, 09:00 UTC15m
2026-05-20 AZG246 KGF → HKG May 20, 04:40 UTCMay 20, 05:15 UTC35m
2026-05-19 AZG4882 ORD → HHN May 19, 13:45 UTCMay 20, 02:30 UTC12h 45m
2026-05-19 AZG4882 ORD → HHN May 19, 02:20 UTCMay 19, 10:00 UTC7h 40m
2026-05-18 AZG4881 LGG → GYD May 18, 13:20 UTCMay 18, 22:45 UTC9h 24m
2026-05-17 AZG394 BHX → GYD May 17, 21:25 UTCMay 18, 08:10 UTC10h 45m
2026-05-17 AZG393 GYD → BHX May 17, 13:45 UTCMay 17, 18:45 UTC5h 0m
2026-05-16 AZG9798 - May 16, 09:21 UTCMay 16, 12:05 UTC2h 45m
2026-05-16 AZG9797 - May 16, 04:10 UTCMay 16, 05:40 UTC1h 30m
2026-05-15 AZG3095 - May 15, 20:45 UTCMay 16, 01:15 UTC4h 30m
2026-05-15 AZG692 HKG → GYD May 15, 09:35 UTCMay 15, 12:45 UTC3h 10m
2026-05-15 AZG692 HKG → GYD May 15, 06:40 UTCMay 15, 06:55 UTC15m
2026-05-15 AZG1922 DMM → FRU May 15, 02:30 UTCMay 15, 02:35 UTC5m
2026-05-15 AZG1922 DMM → FRU May 15, 01:45 UTCMay 15, 01:55 UTC10m
2026-05-14 AZG1922 DMM → FRU May 14, 20:30 UTCMay 14, 23:35 UTC3h 5m
2026-05-13 AZG1121 - May 13, 02:00 UTCMay 13, 02:10 UTC10m
2026-05-12 AZG5851 - May 12, 12:05 UTCMay 12, 15:05 UTC3h 0m
2026-05-12 AZG232 HHN → GYD May 12, 08:10 UTCMay 12, 09:20 UTC1h 10m
2026-05-11 AZG231 VIE → HHN May 11, 10:20 UTCMay 12, 06:05 UTC19h 45m
2026-05-11 AZG3039 - May 11, 08:20 UTCMay 12, 06:05 UTC21h 45m
2026-05-11 AZG3039 - May 11, 07:55 UTCMay 12, 06:05 UTC22h 11m
2026-05-11 AZG237 GYD → HHN May 11, 00:15 UTCMay 11, 04:25 UTC4h 10m
2026-05-09 AZG394 BHX → GYD May 9, 19:05 UTCMay 9, 23:44 UTC4h 40m
2026-05-08 AZG393 GYD → BHX May 8, 23:20 UTCMay 9, 15:50 UTC16h 30m
2026-05-08 AZG1673 - May 8, 01:04 UTCMay 8, 19:50 UTC18h 45m
2026-05-07 AZG1673 - May 7, 20:15 UTCMay 7, 21:30 UTC1h 15m
2026-05-05 AZG634 SIN → DWC May 5, 07:15 UTCMay 5, 12:45 UTC5h 30m
2026-05-04 AZG633 - May 4, 21:45 UTCMay 5, 03:00 UTC5h 15m
2026-05-03 AZG217 TLV → GYD May 3, 06:20 UTCMay 3, 08:20 UTC2h 0m
2026-05-03 AZG216 - May 3, 00:40 UTCMay 3, 03:05 UTC2h 25m
2026-05-02 AZG208 AMS → GYD May 2, 16:35 UTCMay 2, 19:15 UTC2h 40m
2026-05-01 AZG207 GYD → AMS May 1, 22:40 UTCMay 2, 12:40 UTC14h 0m
2026-05-01 AZG280 GYD → VIE May 1, 16:45 UTCMay 1, 18:45 UTC2h 0m
2026-05-01 AZG393 GYD → BHX May 1, 09:30 UTCMay 1, 14:30 UTC5h 0m
2026-04-30 AZG274 - Apr 30, 16:30 UTCApr 30, 20:00 UTC3h 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 4K-SW888 page for operator, model, and routing details .

Mode-S 600B21 frequently asked

What is Mode-S code 600B21?
600B21 is an ICAO 24-bit transponder address. Allocated to Azerbaijan. Assigned to 4K-SW888.
Where is Mode-S 600B21 registered?
Mode-S code 600B21 is allocated to Azerbaijan (AZ). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 600B21 broadcasting right now?
Yes. Mode-S 600B21 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 600B21, octal 30005441, decimal 6,294,305.
What flights does 600B21 operate?
Mode-S 600B21 has broadcast 20 distinct callsigns, including AZG7733, AZG6889, AZG3941, AZG3942, AZG9492.