Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A27220

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N257GL · BEECH 1900 · operated by ALPINE AVIATION INC

Hex
A27220
Octal
50471040
Decimal
10,646,048
Country
US
Tail
N257GL
Type
B190
No current signal · last broadcast 5h ago
Flights observed
135
Distinct callsigns
19
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A27220.

Country allocation

The ICAO 24-bit address A27220 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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 19 distinct

Callsign Airline Flights Last seen
AIP1522 Alpine Air Express 20 2026-05-15
AIP1587 - 19 2026-07-11
AIP1588 - 18 2026-07-10
AIP1541 - 14 2026-07-11
AIP1521 Alpine Air Express 14 2026-05-15
AIP1542 - 10 2026-06-13
AIP1044 - 10 2026-06-27
AIP1604 Alpine Air Express 5 2026-07-02
AIP1603 - 5 2026-07-02
AIP308 Alpine Air Express 4 2026-05-15
AIP1407 Alpine Air Express 4 2026-04-22
N257GL - 2 2026-05-11
AIP1578 Alpine Air Express 2 2026-05-27
AIP1577 Alpine Air Express 2 2026-05-28
AIP1408 Alpine Air Express 2 2026-04-22
AIP428 Alpine Air Express 1 2026-04-23
AIP1566 - 1 2026-07-13
AIP1565 - 1 2026-07-14
AIP1563 - 1 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AIP1565 - Jul 14, 11:35 UTCJul 14, 12:20 UTC45m
2026-07-13 AIP1566 - Jul 13, 23:40 UTCJul 14, 00:10 UTC30m
2026-07-13 AIP1563 - Jul 13, 21:25 UTCJul 13, 22:05 UTC40m
2026-07-11 AIP1541 FSD → FAR Jul 11, 21:10 UTCJul 11, 22:05 UTC55m
2026-07-11 AIP1587 - Jul 11, 00:55 UTCJul 11, 01:45 UTC50m
2026-07-10 AIP1588 - Jul 10, 12:25 UTCJul 10, 13:20 UTC55m
2026-07-10 AIP1587 - Jul 10, 00:50 UTCJul 10, 01:35 UTC45m
2026-07-09 AIP1588 - Jul 9, 11:25 UTCJul 9, 12:25 UTC1h 0m
2026-07-09 AIP1587 - Jul 9, 00:55 UTCJul 9, 01:45 UTC50m
2026-07-08 AIP1588 - Jul 8, 11:30 UTCJul 8, 12:35 UTC1h 5m
2026-07-08 AIP1587 - Jul 8, 00:45 UTCJul 8, 01:35 UTC50m
2026-07-07 AIP1588 - Jul 7, 11:25 UTCJul 7, 12:20 UTC55m
2026-07-04 AIP1587 - Jul 4, 00:55 UTCJul 4, 01:40 UTC45m
2026-07-03 AIP1588 - Jul 3, 11:20 UTCJul 3, 12:20 UTC1h 0m
2026-07-02 AIP1604 RAP → FSD Jul 2, 14:05 UTCJul 2, 15:05 UTC1h 0m
2026-07-02 AIP1603 - Jul 2, 11:55 UTCJul 2, 12:55 UTC1h 0m
2026-07-01 AIP1604 RAP → FSD Jul 1, 14:50 UTCJul 1, 15:45 UTC55m
2026-07-01 AIP1603 - Jul 1, 12:20 UTCJul 1, 13:25 UTC1h 5m
2026-07-01 AIP1587 - Jul 1, 00:55 UTCJul 1, 01:45 UTC50m
2026-06-30 AIP1588 - Jun 30, 11:45 UTCJun 30, 12:50 UTC1h 5m
2026-06-27 AIP1044 - Jun 27, 19:19 UTCJun 27, 20:14 UTC55m
2026-06-27 AIP1044 - Jun 27, 17:04 UTCJun 27, 18:04 UTC1h 0m
2026-06-27 AIP1587 - Jun 27, 00:44 UTCJun 27, 01:35 UTC50m
2026-06-26 AIP1588 - Jun 26, 13:40 UTCJun 26, 14:39 UTC1h 0m
2026-06-25 AIP1587 - Jun 25, 00:49 UTCJun 25, 01:35 UTC45m
2026-06-24 AIP1588 - Jun 24, 11:50 UTCJun 24, 12:54 UTC1h 5m
2026-06-24 AIP1587 - Jun 24, 00:59 UTCJun 24, 01:44 UTC45m
2026-06-23 AIP1588 - Jun 23, 11:29 UTCJun 23, 12:35 UTC1h 5m
2026-06-23 AIP1587 - Jun 23, 00:50 UTCJun 23, 01:45 UTC55m
2026-06-22 AIP1044 - Jun 22, 22:49 UTCJun 22, 23:50 UTC1h 0m
2026-06-20 AIP1044 - Jun 20, 20:14 UTCJun 20, 21:05 UTC50m
2026-06-20 AIP1044 - Jun 20, 12:34 UTCJun 20, 13:39 UTC1h 5m
2026-06-19 AIP1587 - Jun 19, 00:49 UTCJun 19, 01:39 UTC50m
2026-06-18 AIP1588 - Jun 18, 17:35 UTCJun 18, 18:35 UTC1h 0m
2026-06-13 AIP1541 BIS → FAR Jun 13, 21:15 UTCJun 13, 22:00 UTC45m
2026-06-13 AIP1541 BIS → FAR Jun 13, 17:55 UTCJun 13, 18:20 UTC25m
2026-06-13 AIP1542 - Jun 13, 12:35 UTCJun 13, 13:05 UTC30m
2026-06-13 AIP1541 BIS → FAR Jun 13, 00:25 UTCJun 13, 00:45 UTC20m
2026-06-12 AIP1542 FAR → DIK Jun 12, 12:10 UTCJun 12, 12:45 UTC35m
2026-06-12 AIP1541 BIS → FAR Jun 12, 00:20 UTCJun 12, 00:45 UTC25m
2026-06-11 AIP1542 FAR → DIK Jun 11, 12:05 UTCJun 11, 12:40 UTC35m
2026-06-11 AIP1541 BIS → FAR Jun 11, 00:30 UTCJun 11, 00:50 UTC20m
2026-06-10 AIP1542 FAR → DIK Jun 10, 12:10 UTCJun 10, 12:45 UTC35m
2026-06-10 AIP1541 BIS → FAR Jun 10, 00:40 UTCJun 10, 01:05 UTC25m
2026-06-09 AIP1542 FAR → DIK Jun 9, 12:20 UTCJun 9, 12:55 UTC35m
2026-06-09 AIP1541 BIS → FAR Jun 9, 00:35 UTCJun 9, 00:55 UTC20m
2026-06-08 AIP1542 FAR → DIK Jun 8, 21:35 UTCJun 8, 22:10 UTC35m
2026-06-06 AIP1541 BIS → FAR Jun 6, 00:45 UTCJun 6, 01:05 UTC20m
2026-06-05 AIP1542 FAR → DIK Jun 5, 11:35 UTCJun 5, 12:05 UTC30m
2026-06-05 AIP1541 BIS → FAR Jun 5, 00:40 UTCJun 5, 00:55 UTC15m

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 N257GL page for operator, model, and routing details .

Mode-S A27220 frequently asked

What is Mode-S code A27220?
A27220 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N257GL.
Where is Mode-S A27220 registered?
Mode-S code A27220 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A27220 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A27220, octal 50471040, decimal 10,646,048.
What flights does A27220 operate?
Mode-S A27220 has broadcast 19 distinct callsigns, including AIP1522, AIP1587, AIP1588, AIP1541, AIP1521.