Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A8FC09

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N67815 · BOEING 737-900 · operated by UNITED AIRLINES INC

Hex
A8FC09
Octal
52176011
Decimal
11,074,569
Country
US
Tail
N67815
Type
B739
No current signal · last broadcast 12d ago
Flights observed
365
Distinct callsigns
20
Country
US
Last broadcast
12d ago

Last known position

Most recent position reported by Mode-S A8FC09.

Country allocation

The ICAO 24-bit address A8FC09 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 20 distinct

Callsign Airline Flights Last seen
UAL2138 - 6 2026-06-15
UAL1196 United Airlines 5 2026-05-16
UAL1154 United Airlines 5 2026-05-16
UAL624 United Airlines 4 2026-06-10
UAL447 United Airlines 4 2026-05-19
UAL320 United Airlines 4 2026-06-16
UAL1075 United Airlines 4 2026-05-30
UAL293 United Airlines 3 2026-04-18
UAL2830 United Airlines 3 2026-06-17
UAL2794 United Airlines 3 2026-06-13
UAL279 United Airlines 3 2026-06-09
UAL2443 United Airlines 3 2026-06-04
UAL2298 United Airlines 3 2026-05-17
UAL2207 United Airlines 3 2026-05-09
UAL215 United Airlines 3 2026-05-18
UAL2142 United Airlines 3 2026-05-29
UAL2053 - 3 2026-06-23
UAL1887 - 3 2026-04-13
UAL1859 United Airlines 3 2026-05-12
UAL1850 United Airlines 3 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-01 UAL3894 - Jul 1, 19:45 UTCJul 1, 22:00 UTC2h 15m
2026-07-01 UAL3894 IAH → INT Jul 1, 19:50 UTCJul 1, 21:50 UTC2h 0m
2026-06-29 UAL489 DEN → IAH Jun 29, 22:05 UTCJun 30, 00:04 UTC2h 0m
2026-06-29 UAL2168 - Jun 29, 17:55 UTCJun 29, 18:14 UTC20m
2026-06-29 UAL2168 IAH → DEN Jun 29, 17:54 UTCJun 29, 19:45 UTC1h 51m
2026-06-29 UAL1720 - Jun 29, 13:54 UTCJun 29, 15:49 UTC1h 55m
2026-06-29 UAL1792 EWR → DEN Jun 29, 02:30 UTCJun 29, 05:54 UTC3h 25m
2026-06-28 UAL3025 EWR → SFO Jun 28, 21:55 UTCJun 29, 01:05 UTC3h 10m
2026-06-28 UAL1899 ORD → DEN Jun 28, 18:14 UTCJun 28, 20:19 UTC2h 5m
2026-06-28 UAL622 - Jun 28, 15:20 UTCJun 28, 16:29 UTC1h 10m
2026-06-28 UAL2779 ORD → CMH Jun 28, 12:53 UTCJun 28, 13:28 UTC35m
2026-06-28 UAL2779 ORD → CMH Jun 28, 12:44 UTCJun 28, 13:29 UTC45m
2026-06-28 UAL1148 SMF → ORD Jun 28, 06:56 UTCJun 28, 10:05 UTC3h 9m
2026-06-28 UAL1148 SMF → ORD Jun 28, 06:59 UTCJun 28, 10:19 UTC3h 20m
2026-06-28 UAL1828 ORD → SMF Jun 28, 01:10 UTCJun 28, 05:09 UTC4h 0m
2026-06-27 UAL2627 EWR → ORD Jun 27, 21:25 UTCJun 27, 23:39 UTC2h 15m
2026-06-27 UAL2643 - Jun 27, 16:20 UTCJun 27, 19:29 UTC3h 10m
2026-06-27 UAL519 - Jun 27, 02:55 UTCJun 27, 04:39 UTC1h 45m
2026-06-26 UAL2751 - Jun 26, 22:49 UTCJun 27, 01:39 UTC2h 50m
2026-06-26 UAL1535 - Jun 26, 17:09 UTCJun 26, 19:39 UTC2h 30m
2026-06-26 UAL1691 - Jun 26, 14:29 UTCJun 26, 15:15 UTC45m
2026-06-26 UAL2147 IAD → EWR Jun 26, 10:50 UTCJun 26, 11:45 UTC55m
2026-06-26 UAL2147 IAD → EWR Jun 26, 10:45 UTCJun 26, 11:39 UTC54m
2026-06-26 UAL2202 - Jun 26, 00:50 UTCJun 26, 02:00 UTC1h 10m
2026-06-25 UAL1393 IAD → ORD Jun 25, 19:54 UTCJun 25, 21:50 UTC1h 55m
2026-06-25 UAL2081 SFO → IAH Jun 25, 13:09 UTCJun 25, 17:25 UTC4h 15m
2026-06-25 UAL1385 - Jun 25, 02:45 UTCJun 25, 07:54 UTC5h 10m
2026-06-24 UAL421 DEN → IAD Jun 24, 22:04 UTCJun 25, 00:49 UTC2h 45m
2026-06-24 UAL421 DEN → IAD Jun 24, 22:04 UTCJun 25, 00:55 UTC2h 51m
2026-06-24 UAL1195 - Jun 24, 18:50 UTCJun 24, 20:05 UTC1h 15m
2026-06-24 UAL361 DEN → OMA Jun 24, 16:30 UTCJun 24, 17:25 UTC55m
2026-06-24 UAL361 - Jun 24, 16:19 UTCJun 24, 17:25 UTC1h 5m
2026-06-24 UAL337 - Jun 24, 13:24 UTCJun 24, 14:45 UTC1h 20m
2026-06-23 UAL2053 ORD → PHX Jun 23, 21:39 UTCJun 24, 00:55 UTC3h 15m
2026-06-23 UAL2331 IAD → RDU Jun 23, 17:25 UTCJun 23, 19:04 UTC1h 40m
2026-06-23 UAL1893 - Jun 23, 14:04 UTCJun 23, 15:44 UTC1h 40m
2026-06-22 UAL2463 IAD → MCO Jun 22, 23:24 UTCJun 23, 01:30 UTC2h 5m
2026-06-22 UAL8177 - Jun 22, 17:40 UTCJun 22, 18:19 UTC40m
2026-06-22 UAL1536 IAD → RDU Jun 22, 15:45 UTCJun 22, 16:24 UTC40m
2026-06-21 UAL2639 DFW → IAD Jun 21, 12:35 UTCJun 21, 14:50 UTC2h 15m
2026-06-20 UAL2116 IAD → DFW Jun 20, 22:25 UTCJun 21, 01:05 UTC2h 40m
2026-06-20 UAL721 BOS → IAD Jun 20, 18:36 UTCJun 20, 19:53 UTC1h 17m
2026-06-20 UAL2058 EWR → BOS Jun 20, 01:07 UTCJun 20, 01:45 UTC38m
2026-06-20 UAL2058 EWR → BOS Jun 20, 00:59 UTCJun 20, 01:44 UTC45m
2026-06-19 UAL1831 IAD → EWR Jun 19, 22:09 UTCJun 19, 22:55 UTC45m
2026-06-19 UAL2366 - Jun 19, 18:20 UTCJun 19, 20:40 UTC2h 20m
2026-06-19 UAL1524 - Jun 19, 12:44 UTCJun 19, 15:24 UTC2h 40m
2026-06-18 UAL1478 - Jun 18, 22:05 UTCJun 19, 00:34 UTC2h 29m
2026-06-18 UAL1478 IAH → IAD Jun 18, 21:30 UTCJun 19, 00:37 UTC3h 7m
2026-06-18 UAL2110 - Jun 18, 16:20 UTCJun 18, 19:35 UTC3h 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 N67815 page for operator, model, and routing details .

Mode-S A8FC09 frequently asked

What is Mode-S code A8FC09?
A8FC09 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N67815.
Where is Mode-S A8FC09 registered?
Mode-S code A8FC09 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 A8FC09 broadcasting right now?
No active broadcast right now. Last signal was 12d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8FC09, octal 52176011, decimal 11,074,569.
What flights does A8FC09 operate?
Mode-S A8FC09 has broadcast 20 distinct callsigns, including UAL2138, UAL1196, UAL1154, UAL624, UAL447.