Apparatus

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sensors Mode-S transponder

A58DE0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N457UA · AIRBUS A-320 · operated by UNITED AIRLINES INC

Hex
A58DE0
Octal
51306740
Decimal
10,849,760
Country
US
Tail
N457UA
Type
A320
No current signal · last broadcast Jul 26, 20:30 UTC
Flights observed
405
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:30 UTC

Last known position

Most recent position reported by Mode-S A58DE0.

Country allocation

The ICAO 24-bit address A58DE0 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
UAL750 United Airlines 6 2026-04-28
UAL697 - 6 2026-06-22
UAL502 United Airlines 5 2026-07-23
UAL333 United Airlines 5 2026-06-07
UAL1874 - 5 2026-06-29
UAL817 - 4 2026-06-15
UAL718 United Airlines 4 2026-06-15
UAL537 United Airlines 4 2026-04-28
UAL1640 United Airlines 4 2026-04-29
UAL1537 United Airlines 4 2026-07-25
UAL1371 United Airlines 4 2026-04-29
UAL1366 United Airlines 4 2026-07-23
UAL1326 United Airlines 4 2026-06-11
UAL625 United Airlines 3 2026-05-05
UAL2844 - 3 2026-06-22
UAL2838 United Airlines 3 2026-07-24
UAL2787 United Airlines 3 2026-06-06
UAL2786 United Airlines 3 2026-06-19
UAL2677 United Airlines 3 2026-07-23
UAL2638 United Airlines 3 2026-05-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1305 EWR → RDU Jul 26, 18:50 UTCJul 26, 20:25 UTC1h 35m
2026-07-26 UAL397 EWR → MCO Jul 26, 16:00 UTCJul 26, 17:30 UTC1h 30m
2026-07-26 UAL1442 IAH → EWR Jul 26, 11:10 UTCJul 26, 12:20 UTC1h 10m
2026-07-26 UAL1787 SFO → DEN Jul 26, 04:15 UTCJul 26, 05:20 UTC1h 5m
2026-07-26 UAL1787 SFO → DEN Jul 26, 04:12 UTCJul 26, 05:14 UTC1h 2m
2026-07-26 UAL531 EWR → PBI Jul 26, 02:35 UTCJul 26, 03:00 UTC25m
2026-07-26 UAL531 EWR → PBI Jul 26, 02:05 UTCJul 26, 02:58 UTC53m
2026-07-25 UAL1537 RSW → EWR Jul 25, 23:55 UTCJul 26, 00:30 UTC35m
2026-07-25 UAL1537 RSW → EWR Jul 25, 23:59 UTCJul 26, 00:54 UTC55m
2026-07-25 UAL355 BUR → SFO Jul 25, 11:25 UTCJul 25, 12:45 UTC1h 20m
2026-07-25 UAL1515 SNA → EWR Jul 25, 01:30 UTCJul 25, 04:30 UTC3h 0m
2026-07-24 UAL2262 LAS → SFO Jul 24, 23:05 UTCJul 25, 00:30 UTC1h 25m
2026-07-24 UAL2082 MDT → ORD Jul 24, 18:00 UTCJul 24, 20:00 UTC2h 0m
2026-07-24 UAL2838 HKG → SFO Jul 24, 15:25 UTCJul 24, 16:35 UTC1h 10m
2026-07-24 UAL1436 BOS → ORD Jul 24, 05:48 UTCJul 24, 06:44 UTC56m
2026-07-24 UAL1436 BOS → ORD Jul 24, 05:45 UTCJul 24, 06:00 UTC15m
2026-07-24 UAL2649 ORD → LAX Jul 24, 01:00 UTCJul 24, 02:50 UTC1h 50m
2026-07-23 UAL1707 SXM → ORD Jul 23, 19:30 UTCJul 23, 21:25 UTC1h 55m
2026-07-23 UAL502 IAH → DCA Jul 23, 15:50 UTCJul 23, 18:15 UTC2h 25m
2026-07-23 UAL1366 IAD → DEN Jul 23, 13:10 UTCJul 23, 14:35 UTC1h 25m
2026-07-23 UAL1524 IAH → EWR Jul 23, 10:30 UTCJul 23, 11:00 UTC30m
2026-07-23 UAL2677 CLE → DEN Jul 23, 04:20 UTCJul 23, 05:00 UTC40m
2026-07-23 UAL2634 ATL → IAD Jul 23, 00:30 UTCJul 23, 01:45 UTC1h 15m
2026-07-22 UAL1671 ORD → BWI Jul 22, 19:40 UTCJul 22, 22:05 UTC2h 25m
2026-07-22 UAL502 IAH → DCA Jul 22, 16:00 UTCJul 22, 18:20 UTC2h 20m
2026-07-21 UAL1109 RDU → EWR Jul 21, 20:20 UTCJul 21, 22:25 UTC2h 5m
2026-07-21 UAL1944 ORD → PHX Jul 21, 15:20 UTCJul 21, 18:25 UTC3h 5m
2026-07-20 UAL1094 DEN → YYZ Jul 20, 23:30 UTCJul 21, 02:00 UTC2h 29m
2026-07-20 UAL2447 AUS → DEN Jul 20, 20:00 UTCJul 20, 21:40 UTC1h 40m
2026-07-20 UAL1026 DEN → AUS Jul 20, 16:31 UTCJul 20, 18:25 UTC1h 54m
2026-07-20 UAL1026 DEN → AUS Jul 20, 16:40 UTCJul 20, 18:20 UTC1h 40m
2026-07-20 UAL2334 ORD → PHL Jul 20, 02:05 UTCJul 20, 04:05 UTC2h 0m
2026-07-20 UAL2334 ORD → PHL Jul 20, 02:01 UTCJul 20, 04:00 UTC1h 59m
2026-07-19 UAL1337 EWR → PDX Jul 19, 22:25 UTCJul 20, 00:40 UTC2h 15m
2026-07-19 UAL1741 MSY → EWR Jul 19, 19:40 UTCJul 19, 20:40 UTC1h 0m
2026-07-19 UAL1402 DEN → CVG Jul 19, 17:37 UTCJul 19, 18:20 UTC43m
2026-07-19 UAL1402 DEN → CVG Jul 19, 17:30 UTCJul 19, 18:25 UTC55m
2026-07-19 UAL255 - Jul 19, 13:55 UTCJul 19, 15:55 UTC2h 0m
2026-07-19 UAL255 ATW → DEN Jul 19, 13:37 UTCJul 19, 15:50 UTC2h 13m
2026-07-19 UAL1204 DEN → ATW Jul 19, 00:35 UTCJul 19, 02:25 UTC1h 50m
2026-07-18 UAL2447 AUS → DEN Jul 18, 20:01 UTCJul 18, 21:51 UTC1h 50m
2026-07-18 2447 AUS → DEN Jul 18, 20:10 UTCJul 18, 21:55 UTC1h 45m
2026-07-18 UAL456 EWR → SRQ Jul 18, 14:20 UTCJul 18, 16:00 UTC1h 40m
2026-07-16 UAL2383 - Jul 16, 12:44 UTCJul 16, 15:45 UTC3h 0m
2026-07-16 UAL2383 RDU → DEN Jul 16, 12:44 UTCJul 16, 15:41 UTC2h 57m
2026-07-16 UAL2671 DEN → RDU Jul 16, 00:15 UTCJul 16, 03:20 UTC3h 5m
2026-07-15 UAL1023 SMF → DEN Jul 15, 18:25 UTCJul 15, 20:25 UTC2h 0m
2026-07-15 UAL2149 DEN → SMF Jul 15, 14:15 UTCJul 15, 16:15 UTC2h 0m
2026-07-15 UAL355 - Jul 15, 11:15 UTCJul 15, 12:30 UTC1h 15m
2026-07-15 UAL1515 - Jul 15, 01:20 UTCJul 15, 04:25 UTC3h 5m

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 N457UA page for operator, model, and routing details .

Mode-S A58DE0 frequently asked

What is Mode-S code A58DE0?
A58DE0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N457UA.
Where is Mode-S A58DE0 registered?
Mode-S code A58DE0 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 A58DE0 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A58DE0, octal 51306740, decimal 10,849,760.
What flights does A58DE0 operate?
Mode-S A58DE0 has broadcast 20 distinct callsigns, including UAL750, UAL697, UAL502, UAL333, UAL1874.