Apparatus

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sensors Mode-S transponder

A0B7DC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14515 · operated by UNITED AIRLINES INC

Hex
A0B7DC
Octal
50133734
Decimal
10,532,828
Country
US
Tail
N14515
Type
A21N
Broadcasting now · callsign UAL675 · 32,975 ft
Flights observed
361
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:20 UTC

Current position

A0B7DC is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A0B7DC 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
UAL1233 - 7 2026-07-02
UAL475 United Airlines 5 2026-06-08
UAL2853 United Airlines 5 2026-07-25
UAL2329 United Airlines 5 2026-07-26
UAL2124 United Airlines 5 2026-04-14
UAL1946 - 5 2026-07-15
UAL1599 - 5 2026-07-19
UAL617 - 4 2026-06-15
UAL587 United Airlines 4 2026-07-06
UAL546 United Airlines 4 2026-05-18
UAL2865 - 4 2026-07-09
UAL2813 United Airlines 4 2026-07-25
UAL2275 United Airlines 4 2026-05-06
UAL2089 - 4 2026-07-11
UAL2088 United Airlines 4 2026-05-22
UAL2071 United Airlines 4 2026-07-24
UAL1382 - 4 2026-07-09
UAL1007 United Airlines 4 2026-07-18
UAL405 United Airlines 3 2026-07-22
UAL360 United Airlines 3 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2803 DEN → SFO Jul 26, 20:10 UTCJul 26, 22:15 UTC2h 5m
2026-07-26 UAL2329 RNO → SFO Jul 26, 16:00 UTCJul 26, 18:05 UTC2h 5m
2026-07-26 UAL2031 IAD → BTV Jul 26, 10:45 UTCJul 26, 14:00 UTC3h 15m
2026-07-25 UAL2853 DEN → EWR Jul 25, 19:00 UTCJul 25, 21:50 UTC2h 50m
2026-07-25 UAL2853 DEN → EWR Jul 25, 19:03 UTCJul 25, 21:45 UTC2h 42m
2026-07-25 UAL1450 EWR → PBI Jul 25, 14:55 UTCJul 25, 16:50 UTC1h 55m
2026-07-25 UAL2813 ORD → IAH Jul 25, 01:40 UTCJul 25, 03:35 UTC1h 55m
2026-07-25 UAL2813 ORD → IAH Jul 25, 01:40 UTCJul 25, 03:40 UTC2h 0m
2026-07-24 UAL2071 SNA → EWR Jul 24, 20:45 UTCJul 24, 23:00 UTC2h 15m
2026-07-24 UAL2008 IAH → LGA Jul 24, 16:50 UTCJul 24, 19:05 UTC2h 15m
2026-07-24 UAL1775 SFO → PHX Jul 24, 12:25 UTCJul 24, 13:55 UTC1h 30m
2026-07-24 UAL1924 SAN → SFO Jul 24, 06:15 UTCJul 24, 09:05 UTC2h 50m
2026-07-23 UAL2667 ORD → PHL Jul 23, 23:40 UTCJul 24, 02:55 UTC3h 15m
2026-07-23 UAL2853 DEN → EWR Jul 23, 18:45 UTCJul 23, 21:35 UTC2h 50m
2026-07-23 UAL2853 DEN → EWR Jul 23, 18:49 UTCJul 23, 21:30 UTC2h 41m
2026-07-23 UAL1450 EWR → PBI Jul 23, 14:55 UTCJul 23, 16:50 UTC1h 55m
2026-07-23 UAL1585 SFO → PVR Jul 23, 01:30 UTCJul 23, 03:20 UTC1h 50m
2026-07-22 UAL360 DFW → EWR Jul 22, 21:10 UTCJul 22, 23:30 UTC2h 20m
2026-07-22 UAL405 RSW → ORD Jul 22, 17:30 UTCJul 22, 19:15 UTC1h 45m
2026-07-22 UAL3931 EWR → CLE Jul 22, 13:00 UTCJul 22, 16:10 UTC3h 10m
2026-07-21 UAL789 EWR → CLT Jul 21, 15:45 UTCJul 21, 20:05 UTC4h 20m
2026-07-20 UAL8217 SAV → ORD Jul 20, 23:50 UTCJul 21, 03:05 UTC3h 15m
2026-07-20 UAL2853 DEN → EWR Jul 20, 18:40 UTCJul 20, 21:35 UTC2h 55m
2026-07-20 UAL1450 EWR → PBI Jul 20, 14:50 UTCJul 20, 16:40 UTC1h 50m
2026-07-20 UAL475T DEN → IAH Jul 20, 02:15 UTCJul 20, 04:05 UTC1h 50m
2026-07-19 UAL484 IAH → DEN Jul 19, 21:30 UTCJul 19, 23:25 UTC1h 55m
2026-07-19 UAL1599 DEN → IAH Jul 19, 17:56 UTCJul 19, 19:42 UTC1h 46m
2026-07-19 UAL1599 - Jul 19, 17:50 UTCJul 19, 19:00 UTC1h 10m
2026-07-19 UAL337 PHX → DEN Jul 19, 13:10 UTCJul 19, 14:40 UTC1h 30m
2026-07-19 UAL337 PHX → DEN Jul 19, 13:12 UTCJul 19, 14:38 UTC1h 26m
2026-07-18 UAL2053 SFO → PDX Jul 18, 21:50 UTCJul 19, 00:55 UTC3h 5m
2026-07-18 UAL1568 ORD → SFO Jul 18, 15:35 UTCJul 18, 19:35 UTC4h 0m
2026-07-18 UAL1007 ORD → ALB Jul 18, 02:40 UTCJul 18, 04:55 UTC2h 16m
2026-07-17 UAL360 DFW → EWR Jul 17, 20:04 UTCJul 17, 22:05 UTC2h 0m
2026-07-17 UAL405 - Jul 17, 16:24 UTCJul 17, 18:15 UTC1h 50m
2026-07-17 UAL2601 RSW → EWR Jul 17, 12:15 UTCJul 17, 14:30 UTC2h 15m
2026-07-16 UAL1801 BUR → SFO Jul 16, 22:49 UTCJul 17, 02:39 UTC3h 50m
2026-07-16 UAL1568 - Jul 16, 15:35 UTCJul 16, 19:20 UTC3h 45m
2026-07-15 UAL511 - Jul 15, 22:10 UTCJul 16, 01:55 UTC3h 45m
2026-07-15 UAL1946 - Jul 15, 15:30 UTCJul 15, 19:25 UTC3h 55m
2026-07-15 UAL1946 LAX → ORD Jul 15, 15:37 UTCJul 15, 19:00 UTC3h 23m
2026-07-15 UAL531 DEN → LAX Jul 15, 03:59 UTCJul 15, 05:45 UTC1h 46m
2026-07-15 UAL531 - Jul 15, 04:00 UTCJul 15, 05:50 UTC1h 50m
2026-07-14 UAL2297 BOS → DEN Jul 14, 19:20 UTCJul 14, 23:05 UTC3h 44m
2026-07-14 UAL2297 BOS → DEN Jul 14, 19:24 UTCJul 14, 23:00 UTC3h 36m
2026-07-14 UAL558 DEN → BOS Jul 14, 14:10 UTCJul 14, 17:40 UTC3h 30m
2026-07-14 UAL1066 - Jul 14, 03:45 UTCJul 14, 05:40 UTC1h 55m
2026-07-13 UAL8154 - Jul 13, 23:20 UTCJul 14, 01:30 UTC2h 10m
2026-07-13 UAL1583 - Jul 13, 17:55 UTCJul 13, 21:10 UTC3h 15m
2026-07-13 UAL2316 DEN → LAS Jul 13, 14:25 UTCJul 13, 15:50 UTC1h 25m

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 N14515 page for operator, model, and routing details .

Mode-S A0B7DC frequently asked

What is Mode-S code A0B7DC?
A0B7DC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14515.
Where is Mode-S A0B7DC registered?
Mode-S code A0B7DC 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 A0B7DC broadcasting right now?
Yes. Mode-S A0B7DC is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0B7DC, octal 50133734, decimal 10,532,828.
What flights does A0B7DC operate?
Mode-S A0B7DC has broadcast 20 distinct callsigns, including UAL1233, UAL475, UAL2853, UAL2329, UAL2124.