Apparatus

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sensors Mode-S transponder

A76F67

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N57863 · BOEING 757-300 · operated by UNITED AIRLINES INC

Hex
A76F67
Octal
51667547
Decimal
10,973,031
Country
US
Tail
N57863
Type
B753
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
377
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A76F67.

Country allocation

The ICAO 24-bit address A76F67 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
UAL638 - 17 2026-07-08
UAL1722 United Airlines 14 2026-07-22
UAL1721 - 14 2026-07-21
UAL1176 - 13 2026-07-08
UAL501 - 11 2026-07-05
UAL2087 United Airlines 11 2026-06-13
UAL599 - 10 2026-06-13
UAL2348 United Airlines 10 2026-07-24
UAL1022 United Airlines 10 2026-07-06
UAL2633 United Airlines 9 2026-07-07
UAL1654 - 9 2026-07-07
UAL1116 United Airlines 9 2026-07-20
UAL531 United Airlines 8 2026-05-05
UAL1389 United Airlines 8 2026-05-06
UAL373 United Airlines 7 2026-07-26
UAL2499 United Airlines 7 2026-05-12
UAL2292 United Airlines 7 2026-04-29
UAL2268 - 7 2026-07-11
UAL2008 United Airlines 7 2026-05-11
UAL912 - 6 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL373 BTV → ORD Jul 26, 21:05 UTCJul 26, 21:45 UTC40m
2026-07-26 UAL373 BTV → ORD Jul 26, 17:25 UTCJul 26, 17:45 UTC20m
2026-07-25 UAL1431 IAH → SNA Jul 25, 21:40 UTCJul 26, 02:55 UTC5h 15m
2026-07-25 UAL1868 LAX → EWR Jul 25, 13:50 UTCJul 25, 18:35 UTC4h 45m
2026-07-25 UAL1868 LAX → EWR Jul 25, 13:58 UTCJul 25, 18:29 UTC4h 31m
2026-07-24 UAL347 PHL → DEN Jul 24, 20:30 UTCJul 24, 23:15 UTC2h 45m
2026-07-24 UAL2348 IAH → LGA Jul 24, 16:58 UTCJul 24, 18:52 UTC1h 54m
2026-07-24 UAL2348 IAH → LGA Jul 24, 16:55 UTCJul 24, 18:55 UTC2h 0m
2026-07-24 UAL246 ORD → LGA Jul 24, 11:35 UTCJul 24, 15:25 UTC3h 50m
2026-07-24 UAL1375 JAX → EWR Jul 24, 01:55 UTCJul 24, 05:20 UTC3h 25m
2026-07-23 UAL1577 RNO → SFO Jul 23, 20:20 UTCJul 24, 00:15 UTC3h 55m
2026-07-23 UAL1941 IAD → EWR Jul 23, 14:10 UTCJul 23, 17:50 UTC3h 40m
2026-07-23 UAL1967 DEN → MSN Jul 23, 00:20 UTCJul 23, 03:55 UTC3h 35m
2026-07-23 UAL1967 DEN → MSN Jul 23, 00:17 UTCJul 23, 03:52 UTC3h 35m
2026-07-22 UAL8102 YYZ → YQB Jul 22, 17:25 UTCJul 22, 21:10 UTC3h 45m
2026-07-22 UAL246 ORD → LGA Jul 22, 11:30 UTCJul 22, 15:15 UTC3h 45m
2026-07-22 UAL2278 ORD → SEA Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-22 UAL1722 OGG → SFO Jul 22, 01:50 UTCJul 22, 02:35 UTC45m
2026-07-21 UAL1722 OGG → SFO Jul 21, 22:15 UTCJul 21, 22:25 UTC10m
2026-07-21 UAL1721 - Jul 21, 20:50 UTCJul 21, 20:55 UTC5m
2026-07-21 UAL1721 - Jul 21, 16:00 UTCJul 21, 16:30 UTC30m
2026-07-21 UAL1495 DFW → DEN Jul 21, 02:15 UTCJul 21, 06:05 UTC3h 50m
2026-07-20 UAL2317 EWR → AUS Jul 20, 19:45 UTCJul 20, 23:50 UTC4h 5m
2026-07-20 UAL1116 BOS → ORD Jul 20, 13:00 UTCJul 20, 16:45 UTC3h 45m
2026-07-20 UAL8269 SFO → IAH Jul 20, 06:33 UTCJul 20, 09:56 UTC3h 23m
2026-07-20 UAL8269 SFO → IAH Jul 20, 06:35 UTCJul 20, 10:10 UTC3h 35m
2026-07-20 UAL1722 OGG → SFO Jul 20, 02:05 UTCJul 20, 03:00 UTC55m
2026-07-19 UAL1722 OGG → SFO Jul 19, 22:15 UTCJul 19, 22:25 UTC10m
2026-07-19 UAL1721 - Jul 19, 20:25 UTCJul 19, 20:40 UTC15m
2026-07-19 UAL1721 - Jul 19, 15:45 UTCJul 19, 16:15 UTC30m
2026-07-19 UAL1495 ORD → SFO Jul 19, 03:32 UTCJul 19, 07:34 UTC4h 2m
2026-07-19 UAL1495 ORD → SFO Jul 19, 03:35 UTCJul 19, 07:35 UTC4h 0m
2026-07-18 UAL2317 EWR → AUS Jul 18, 21:45 UTCJul 19, 01:15 UTC3h 30m
2026-07-18 UAL1116 BOS → ORD Jul 18, 13:55 UTCJul 18, 17:50 UTC3h 55m
2026-07-17 UAL457 - Jul 17, 22:10 UTCJul 18, 01:45 UTC3h 35m
2026-07-17 UAL1868 - Jul 17, 13:25 UTCJul 17, 17:50 UTC4h 25m
2026-07-17 UAL8167 YYZ → CLE Jul 17, 06:25 UTCJul 17, 11:04 UTC4h 40m
2026-07-16 UAL543 - Jul 16, 22:45 UTCJul 17, 02:25 UTC3h 40m
2026-07-16 UAL913 KEF → ORD Jul 16, 12:09 UTCJul 16, 18:29 UTC6h 20m
2026-07-16 UAL912 ORD → KEF Jul 16, 04:03 UTCJul 16, 09:36 UTC5h 33m
2026-07-16 UAL912 - Jul 16, 04:05 UTCJul 16, 05:15 UTC1h 10m
2026-07-15 UAL1777 SFO → ORD Jul 15, 22:00 UTCJul 16, 01:40 UTC3h 40m
2026-07-15 UAL543 - Jul 15, 16:35 UTCJul 15, 20:15 UTC3h 40m
2026-07-14 UAL913 - Jul 14, 22:10 UTCJul 14, 23:00 UTC49m
2026-07-14 UAL913 - Jul 14, 17:00 UTCJul 14, 17:15 UTC15m
2026-07-14 UAL912 - Jul 14, 08:40 UTCJul 14, 09:00 UTC20m
2026-07-14 UAL912 - Jul 14, 03:05 UTCJul 14, 04:30 UTC1h 25m
2026-07-13 UAL913 - Jul 13, 17:25 UTCJul 13, 23:30 UTC6h 5m
2026-07-13 UAL912 - Jul 13, 15:35 UTCJul 13, 15:55 UTC20m
2026-07-13 UAL912 - Jul 13, 10:00 UTCJul 13, 10:45 UTC45m

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 N57863 page for operator, model, and routing details .

Mode-S A76F67 frequently asked

What is Mode-S code A76F67?
A76F67 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N57863.
Where is Mode-S A76F67 registered?
Mode-S code A76F67 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 A76F67 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A76F67, octal 51667547, decimal 10,973,031.
What flights does A76F67 operate?
Mode-S A76F67 has broadcast 20 distinct callsigns, including UAL638, UAL1722, UAL1721, UAL1176, UAL501.