Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A44168

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N37307 · operated by UNITED AIRLINES INC

Hex
A44168
Octal
51040550
Decimal
10,764,648
Country
US
Tail
N37307
Type
B38M
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
449
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A44168.

Country allocation

The ICAO 24-bit address A44168 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
UAL1908 United Airlines 6 2026-07-22
UAL841 - 5 2026-06-25
UAL2092 - 5 2026-07-19
UAL446 - 4 2026-07-07
UAL445 United Airlines 4 2026-07-23
UAL267 United Airlines 4 2026-04-22
UAL2264 United Airlines 4 2026-05-12
UAL2213 United Airlines 4 2026-06-01
UAL1763 United Airlines 4 2026-05-23
UAL1566 United Airlines 4 2026-07-23
UAL1445 United Airlines 4 2026-07-22
UAL1108 - 4 2026-06-28
UAL658 United Airlines 3 2026-04-16
UAL564 United Airlines 3 2026-07-25
UAL474 United Airlines 3 2026-05-30
UAL450 - 3 2026-07-19
UAL359 United Airlines 3 2026-05-30
UAL2607 United Airlines 3 2026-07-23
UAL2409 United Airlines 3 2026-06-02
UAL2389 United Airlines 3 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2146 LAX → DEN Jul 26, 19:35 UTCJul 26, 22:00 UTC2h 25m
2026-07-26 UAL1914 PDX → SFO Jul 26, 12:35 UTCJul 26, 17:55 UTC5h 20m
2026-07-26 UAL1366 IAD → DEN Jul 26, 10:15 UTCJul 26, 11:00 UTC45m
2026-07-25 UAL1880 SXM → EWR Jul 25, 18:10 UTCJul 25, 21:45 UTC3h 35m
2026-07-25 UAL346 IAD → SXM Jul 25, 12:30 UTCJul 25, 16:00 UTC3h 30m
2026-07-25 UAL564 BOS → ORD Jul 25, 05:45 UTCJul 25, 09:55 UTC4h 10m
2026-07-25 UAL2429 BDL → ORD Jul 25, 01:50 UTCJul 25, 03:25 UTC1h 35m
2026-07-24 UAL1955 IAD → PHX Jul 24, 22:50 UTCJul 25, 00:35 UTC1h 45m
2026-07-24 UAL1840 EWR → ORD Jul 24, 19:55 UTCJul 24, 20:55 UTC1h 0m
2026-07-24 UAL784 SBA → SFO Jul 24, 14:20 UTCJul 24, 17:20 UTC3h 0m
2026-07-23 UAL1566 IAD → MEX Jul 23, 22:00 UTCJul 24, 02:00 UTC4h 0m
2026-07-23 UAL1566 IAD → MEX Jul 23, 21:43 UTCJul 24, 01:55 UTC4h 12m
2026-07-23 UAL2607 DFW → EWR Jul 23, 19:30 UTCJul 23, 20:15 UTC45m
2026-07-23 UAL2607 DFW → EWR Jul 23, 19:26 UTCJul 23, 20:19 UTC53m
2026-07-23 UAL2066 ORD → PHL Jul 23, 17:20 UTCJul 23, 17:50 UTC30m
2026-07-23 UAL445 CHS → EWR Jul 23, 15:00 UTCJul 23, 15:50 UTC50m
2026-07-23 UAL445 CHS → EWR Jul 23, 14:49 UTCJul 23, 15:52 UTC1h 3m
2026-07-23 UAL1926 SEA → SFO Jul 23, 12:45 UTCJul 23, 13:30 UTC45m
2026-07-23 UAL1789 DEN → SJC Jul 23, 10:30 UTCJul 23, 11:05 UTC35m
2026-07-23 UAL8135 CLE → YYZ Jul 23, 02:50 UTCJul 23, 03:45 UTC55m
2026-07-22 UAL1445 STT → IAD Jul 22, 21:05 UTCJul 23, 00:30 UTC3h 25m
2026-07-22 UAL1445 STT → IAD Jul 22, 20:57 UTCJul 23, 00:29 UTC3h 32m
2026-07-22 UAL1908 IAH → STT Jul 22, 15:10 UTCJul 22, 19:25 UTC4h 15m
2026-07-22 UAL1450 EWR → PBI Jul 22, 11:10 UTCJul 22, 13:00 UTC1h 50m
2026-07-21 UAL2386 EWR → TPA Jul 21, 21:45 UTCJul 22, 02:20 UTC4h 35m
2026-07-21 UAL574 LAS → SFO Jul 21, 18:50 UTCJul 21, 20:00 UTC1h 10m
2026-07-21 UAL2382 IAH → PHL Jul 21, 16:25 UTCJul 21, 17:35 UTC1h 10m
2026-07-21 UAL1685 LIH → DEN Jul 21, 12:40 UTCJul 21, 13:25 UTC45m
2026-07-21 UAL1104 SJC → DEN Jul 21, 00:30 UTCJul 21, 05:45 UTC5h 15m
2026-07-20 UAL2146 LAX → DEN Jul 20, 19:35 UTCJul 20, 22:00 UTC2h 25m
2026-07-20 UAL1914 PDX → SFO Jul 20, 12:45 UTCJul 20, 18:05 UTC5h 20m
2026-07-20 UAL572 ANC → IAD Jul 20, 04:35 UTCJul 20, 11:15 UTC6h 40m
2026-07-19 UAL1592 DEN → BOS Jul 19, 22:20 UTCJul 20, 03:30 UTC5h 10m
2026-07-19 UAL2200 LGA → DEN Jul 19, 17:15 UTCJul 19, 20:40 UTC3h 25m
2026-07-19 UAL2092 ORD → LGA Jul 19, 13:32 UTCJul 19, 14:57 UTC1h 25m
2026-07-19 UAL2092 ORD → LGA Jul 19, 13:30 UTCJul 19, 15:00 UTC1h 30m
2026-07-19 UAL450 ANC → ORD Jul 19, 04:18 UTCJul 19, 09:24 UTC5h 6m
2026-07-19 UAL450 - Jul 19, 04:05 UTCJul 19, 08:00 UTC3h 55m
2026-07-18 UAL2369 - Jul 18, 19:35 UTCJul 19, 02:25 UTC6h 50m
2026-07-18 UAL700 - Jul 18, 15:00 UTCJul 18, 17:50 UTC2h 50m
2026-07-18 UAL2761 - Jul 18, 02:05 UTCJul 18, 04:50 UTC2h 46m
2026-07-17 UAL2341 - Jul 17, 23:05 UTCJul 17, 23:55 UTC50m
2026-07-17 UAL1493 - Jul 17, 20:29 UTCJul 17, 21:20 UTC50m
2026-07-17 UAL508 BOG → IAH Jul 17, 13:55 UTCJul 17, 18:25 UTC4h 30m
2026-07-17 UAL278 - Jul 17, 03:59 UTCJul 17, 06:00 UTC2h 0m
2026-07-17 UAL278 EWR → BOG Jul 17, 03:57 UTCJul 17, 08:50 UTC4h 53m
2026-07-16 UAL1731 - Jul 16, 20:00 UTCJul 17, 00:40 UTC4h 40m
2026-07-16 UAL1731 LAS → EWR Jul 16, 19:56 UTCJul 17, 00:37 UTC4h 41m
2026-07-16 UAL1631 EWR → LAS Jul 16, 13:20 UTCJul 16, 17:54 UTC4h 35m
2026-07-16 UAL406 LAS → EWR Jul 16, 07:05 UTCJul 16, 11:34 UTC4h 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 N37307 page for operator, model, and routing details .

Mode-S A44168 frequently asked

What is Mode-S code A44168?
A44168 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N37307.
Where is Mode-S A44168 registered?
Mode-S code A44168 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 A44168 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A44168, octal 51040550, decimal 10,764,648.
What flights does A44168 operate?
Mode-S A44168 has broadcast 20 distinct callsigns, including UAL1908, UAL841, UAL2092, UAL446, UAL445.