Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A445F2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N37468 · BOEING 737-900 · operated by UNITED AIRLINES INC

Hex
A445F2
Octal
51042762
Decimal
10,765,810
Country
US
Tail
N37468
Type
B739
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
427
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A445F2.

Country allocation

The ICAO 24-bit address A445F2 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
UAL1695 - 5 2026-07-06
UAL2269 - 4 2026-07-22
UAL1689 - 4 2026-07-11
UAL1347 - 4 2026-07-07
UAL1334 - 4 2026-07-08
UAL1010 - 4 2026-07-07
UAL8184 United Airlines 3 2026-05-31
UAL8177 - 3 2026-07-04
UAL758 United Airlines 3 2026-05-24
UAL721 United Airlines 3 2026-05-25
UAL690 - 3 2026-04-17
UAL605 United Airlines 3 2026-07-03
UAL597 - 3 2026-07-02
UAL594 United Airlines 3 2026-04-15
UAL450 United Airlines 3 2026-05-09
UAL337 United Airlines 3 2026-07-22
UAL2770 United Airlines 3 2026-06-16
UAL2603 United Airlines 3 2026-05-22
UAL2493 United Airlines 3 2026-05-09
UAL245 United Airlines 3 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1349 RSW → IAD Jul 26, 22:15 UTCJul 26, 22:30 UTC15m
2026-07-26 UAL2039 LAX → ORD Jul 26, 16:35 UTCJul 26, 20:45 UTC4h 10m
2026-07-26 UAL2127 LGA → ORD Jul 26, 13:30 UTCJul 26, 14:25 UTC55m
2026-07-26 UAL1195 DTW → ORD Jul 26, 04:50 UTCJul 26, 05:45 UTC55m
2026-07-25 UAL1275 SFO → RNO Jul 25, 19:40 UTCJul 25, 23:55 UTC4h 15m
2026-07-25 UAL1198 LAS → ORD Jul 25, 14:45 UTCJul 25, 17:50 UTC3h 5m
2026-07-25 UAL1778 EWR → SAT Jul 25, 10:35 UTCJul 25, 11:55 UTC1h 20m
2026-07-25 UAL1568 ORD → SFO Jul 25, 00:05 UTCJul 25, 01:15 UTC1h 10m
2026-07-24 UAL433 BOS → SFO Jul 24, 20:40 UTCJul 24, 22:25 UTC1h 45m
2026-07-24 UAL1554 SJC → DEN Jul 24, 17:30 UTCJul 24, 18:55 UTC1h 25m
2026-07-24 UAL1554 SJC → DEN Jul 24, 17:37 UTCJul 24, 18:54 UTC1h 17m
2026-07-24 UAL2287 ORD → SAN Jul 24, 13:10 UTCJul 24, 14:10 UTC1h 0m
2026-07-24 UAL1325 DEN → PDX Jul 24, 01:10 UTCJul 24, 01:55 UTC45m
2026-07-23 UAL2627 EWR → ORD Jul 23, 21:05 UTCJul 23, 23:15 UTC2h 10m
2026-07-23 UAL2643 DEN → BOS Jul 23, 16:10 UTCJul 23, 19:20 UTC3h 10m
2026-07-23 UAL557 - Jul 23, 13:10 UTCJul 23, 14:20 UTC1h 10m
2026-07-23 UAL1417 DEN → RDU Jul 23, 02:25 UTCJul 23, 03:30 UTC1h 5m
2026-07-23 UAL1417 DEN → RDU Jul 23, 02:20 UTCJul 23, 03:35 UTC1h 15m
2026-07-22 UAL2288 IAH → LAS Jul 22, 21:25 UTCJul 23, 00:55 UTC3h 30m
2026-07-22 UAL2288 IAH → LAS Jul 22, 21:25 UTCJul 23, 00:49 UTC3h 24m
2026-07-22 UAL2269 DEN → RDU Jul 22, 16:10 UTCJul 22, 19:13 UTC3h 3m
2026-07-22 UAL2269 DEN → RDU Jul 22, 16:15 UTCJul 22, 19:15 UTC3h 0m
2026-07-22 UAL337 DEN → DFW Jul 22, 13:05 UTCJul 22, 14:25 UTC1h 20m
2026-07-21 UAL682 EWR → SFO Jul 21, 23:25 UTCJul 22, 01:20 UTC1h 55m
2026-07-21 UAL1302 EWR → BOS Jul 21, 19:49 UTCJul 21, 21:27 UTC1h 38m
2026-07-21 UAL1302 EWR → BOS Jul 21, 19:40 UTCJul 21, 21:30 UTC1h 50m
2026-07-21 UAL2476 - Jul 21, 16:10 UTCJul 21, 18:00 UTC1h 50m
2026-07-20 UAL2690 LAS → IAH Jul 20, 23:50 UTCJul 21, 02:45 UTC2h 55m
2026-07-20 UAL1976 BOS → IAH Jul 20, 17:50 UTCJul 20, 21:10 UTC3h 20m
2026-07-20 UAL1977 - Jul 20, 12:45 UTCJul 20, 14:30 UTC1h 45m
2026-07-20 UAL1977 IAH → BOS Jul 20, 12:49 UTCJul 20, 16:08 UTC3h 19m
2026-07-20 UAL8202 SFO → SLC Jul 20, 02:20 UTCJul 20, 05:45 UTC3h 25m
2026-07-20 UAL8202 SFO → SLC Jul 20, 02:34 UTCJul 20, 05:45 UTC3h 11m
2026-07-19 UAL589 DEN → RIC Jul 19, 20:55 UTCJul 20, 00:15 UTC3h 20m
2026-07-19 UAL470 - Jul 19, 16:45 UTCJul 19, 18:55 UTC2h 10m
2026-07-19 UAL470 MIA → IAH Jul 19, 16:47 UTCJul 19, 18:54 UTC2h 7m
2026-07-19 UAL1966 - Jul 19, 12:40 UTCJul 19, 15:10 UTC2h 30m
2026-07-19 UAL505 - Jul 19, 07:40 UTCJul 19, 11:05 UTC3h 25m
2026-07-19 UAL2194 ORD → SJC Jul 19, 02:00 UTCJul 19, 05:55 UTC3h 55m
2026-07-18 UAL782 SAT → EWR Jul 18, 22:10 UTCJul 19, 00:50 UTC2h 40m
2026-07-18 UAL2402 - Jul 18, 15:50 UTCJul 18, 18:55 UTC3h 5m
2026-07-17 UAL588 - Jul 17, 22:40 UTCJul 18, 00:35 UTC1h 55m
2026-07-17 UAL1520 MCO → DEN Jul 17, 16:59 UTCJul 17, 20:20 UTC3h 20m
2026-07-17 UAL2321 DEN → MCO Jul 17, 12:15 UTCJul 17, 15:29 UTC3h 15m
2026-07-17 UAL2433 BOS → DEN Jul 17, 02:10 UTCJul 17, 05:45 UTC3h 35m
2026-07-16 UAL2466 ORD → BOS Jul 16, 22:55 UTCJul 17, 00:50 UTC1h 55m
2026-07-16 UAL2443 - Jul 16, 19:55 UTCJul 16, 21:00 UTC1h 5m
2026-07-16 UAL2389 ORD → CLE Jul 16, 17:49 UTCJul 16, 18:34 UTC45m
2026-07-16 UAL1733 - Jul 16, 11:30 UTCJul 16, 13:45 UTC2h 15m
2026-07-16 UAL2443 - Jul 16, 00:15 UTCJul 16, 02:05 UTC1h 50m

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 N37468 page for operator, model, and routing details .

Mode-S A445F2 frequently asked

What is Mode-S code A445F2?
A445F2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N37468.
Where is Mode-S A445F2 registered?
Mode-S code A445F2 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 A445F2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A445F2, octal 51042762, decimal 10,765,810.
What flights does A445F2 operate?
Mode-S A445F2 has broadcast 20 distinct callsigns, including UAL1695, UAL2269, UAL1689, UAL1347, UAL1334.