Apparatus

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sensors Mode-S transponder

A1B7CC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N21GN · operated by GORE NITROGEN PUMPING SERVICE LLC

Hex
A1B7CC
Octal
50333714
Decimal
10,598,348
Country
US
Tail
N21GN
Type
B429
No current signal · last broadcast 6d ago
Flights observed
43
Distinct callsigns
1
Country
US
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S A1B7CC.

Country allocation

The ICAO 24-bit address A1B7CC 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 1 distinct

Callsign Airline Flights Last seen
N21GN - 43 2026-07-11

Recent flights last 43

DateFlightRouteTakeoffLandingDuration
2026-07-11 N21GN - Jul 11, 19:00 UTCJul 11, 19:10 UTC10m
2026-07-11 N21GN - Jul 11, 18:25 UTCJul 11, 18:35 UTC10m
2026-07-10 N21GN - Jul 10, 16:40 UTCJul 10, 16:50 UTC10m
2026-07-10 N21GN - Jul 10, 16:00 UTCJul 10, 16:35 UTC35m
2026-07-09 N21GN - Jul 9, 13:25 UTCJul 9, 13:35 UTC10m
2026-07-06 N21GN - Jul 6, 20:25 UTCJul 6, 20:35 UTC10m
2026-07-06 N21GN - Jul 6, 20:10 UTCJul 6, 20:20 UTC10m
2026-07-04 N21GN - Jul 4, 22:15 UTCJul 4, 22:25 UTC10m
2026-07-04 N21GN - Jul 4, 21:10 UTCJul 4, 22:00 UTC50m
2026-07-04 N21GN - Jul 4, 19:50 UTCJul 4, 20:10 UTC20m
2026-07-04 N21GN - Jul 4, 16:35 UTCJul 4, 16:55 UTC20m
2026-07-04 N21GN - Jul 4, 15:50 UTCJul 4, 15:55 UTC5m
2026-07-04 N21GN - Jul 4, 01:25 UTCJul 4, 01:35 UTC10m
2026-07-03 N21GN - Jul 3, 15:40 UTCJul 3, 15:50 UTC10m
2026-07-03 N21GN - Jul 3, 15:20 UTCJul 3, 15:30 UTC10m
2026-07-02 N21GN - Jul 2, 00:35 UTCJul 2, 00:45 UTC10m
2026-07-02 N21GN - Jul 2, 00:20 UTCJul 2, 00:30 UTC10m
2026-07-01 N21GN - Jul 1, 23:50 UTCJul 2, 00:00 UTC10m
2026-06-30 N21GN - Jun 30, 15:50 UTCJun 30, 16:00 UTC10m
2026-06-30 N21GN - Jun 30, 15:30 UTCJun 30, 15:35 UTC5m
2026-06-30 N21GN - Jun 30, 15:10 UTCJun 30, 15:20 UTC10m
2026-06-30 N21GN - Jun 30, 14:55 UTCJun 30, 15:00 UTC5m
2026-06-27 N21GN - Jun 27, 04:34 UTCJun 27, 04:44 UTC10m
2026-06-27 N21GN - Jun 27, 04:24 UTCJun 27, 04:29 UTC5m
2026-06-26 N21GN - Jun 26, 16:24 UTCJun 26, 16:49 UTC25m
2026-06-26 N21GN - Jun 26, 16:05 UTCJun 26, 16:14 UTC10m
2026-06-18 N21GN - Jun 18, 01:00 UTCJun 18, 01:10 UTC10m
2026-06-18 N21GN - Jun 18, 00:45 UTCJun 18, 00:55 UTC10m
2026-06-16 N21GN - Jun 16, 15:20 UTCJun 16, 15:24 UTC5m
2026-06-16 N21GN - Jun 16, 15:05 UTCJun 16, 15:15 UTC10m
2026-06-14 N21GN - Jun 14, 21:35 UTCJun 14, 22:05 UTC30m
2026-06-14 N21GN - Jun 14, 15:30 UTCJun 14, 15:50 UTC20m
2026-06-14 N21GN - Jun 14, 14:45 UTCJun 14, 14:50 UTC5m
2026-05-31 N21GN - May 31, 15:55 UTCMay 31, 16:15 UTC20m
2026-05-30 N21GN - May 30, 23:40 UTCMay 31, 00:05 UTC25m
2026-05-30 N21GN - May 30, 19:10 UTCMay 30, 19:55 UTC45m
2026-05-30 N21GN - May 30, 18:55 UTCMay 30, 19:05 UTC10m
2026-05-24 N21GN - May 24, 20:25 UTCMay 24, 20:35 UTC10m
2026-05-24 N21GN - May 24, 20:10 UTCMay 24, 20:20 UTC10m
2026-05-23 N21GN LRD → NTR May 23, 20:30 UTCMay 23, 21:15 UTC45m
2026-05-23 N21GN - May 23, 17:15 UTCMay 23, 18:30 UTC1h 16m
2026-04-12 N21GN - Apr 12, 19:35 UTCApr 12, 19:45 UTC10m
2026-04-12 N21GN - Apr 12, 19:20 UTCApr 12, 19:30 UTC10m

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 N21GN page for operator, model, and routing details .

Mode-S A1B7CC frequently asked

What is Mode-S code A1B7CC?
A1B7CC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N21GN.
Where is Mode-S A1B7CC registered?
Mode-S code A1B7CC 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 A1B7CC broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1B7CC, octal 50333714, decimal 10,598,348.
What flights does A1B7CC operate?
Mode-S A1B7CC has broadcast 1 distinct callsign, including N21GN.