Apparatus

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sensors Mode-S transponder

A24CC0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N24729 · BOEING 737-700 · operated by UNITED AIRLINES INC

Hex
A24CC0
Octal
50446300
Decimal
10,636,480
Country
US
Tail
N24729
Type
B737
Broadcasting now · callsign UAL1651 · 38,000 ft
Flights observed
454
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:35 UTC

Current position

A24CC0 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A24CC0 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
UAL2243 - 7 2026-07-16
UAL1884 - 7 2026-07-10
UAL1477 United Airlines 7 2026-07-23
UAL654 - 6 2026-07-15
UAL410 United Airlines 6 2026-07-23
UAL2490 United Airlines 6 2026-07-25
UAL752 - 5 2026-07-15
UAL497 - 5 2026-06-19
UAL358 United Airlines 5 2026-06-14
UAL2233 United Airlines 5 2026-05-18
UAL1852 United Airlines 5 2026-07-20
UAL1764 - 5 2026-06-25
UAL1746 - 5 2026-07-16
UAL1564 United Airlines 5 2026-04-17
UAL1288 - 5 2026-07-16
UAL1201 United Airlines 5 2026-07-24
UAL632 - 4 2026-06-25
UAL564 United Airlines 4 2026-05-12
UAL517 United Airlines 4 2026-05-12
UAL471 - 4 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2026 MTY → IAH Jul 26, 18:30 UTCJul 26, 19:35 UTC1h 5m
2026-07-26 UAL2256 IAH → MTY Jul 26, 15:35 UTCJul 26, 16:40 UTC1h 5m
2026-07-26 UAL2453 BIL → DEN Jul 26, 11:15 UTCJul 26, 13:05 UTC1h 50m
2026-07-26 UAL2293 JAX → EWR Jul 26, 01:35 UTCJul 26, 03:20 UTC1h 45m
2026-07-25 UAL743 EWR → RSW Jul 25, 20:35 UTCJul 25, 23:50 UTC3h 15m
2026-07-25 UAL1348 IAD → RDU Jul 25, 14:45 UTCJul 25, 17:55 UTC3h 10m
2026-07-25 UAL1348 IAD → RDU Jul 25, 14:50 UTCJul 25, 18:00 UTC3h 10m
2026-07-25 UAL2490 TPA → EWR Jul 25, 00:30 UTCJul 25, 02:00 UTC1h 30m
2026-07-25 UAL2490 TPA → EWR Jul 25, 00:24 UTCJul 25, 01:58 UTC1h 34m
2026-07-24 UAL2165 EWR → IAH Jul 24, 21:45 UTCJul 24, 23:15 UTC1h 30m
2026-07-24 UAL1860 SFO → LAS Jul 24, 18:00 UTCJul 24, 19:45 UTC1h 45m
2026-07-24 UAL1861 ONT → IAH Jul 24, 15:20 UTCJul 24, 17:00 UTC1h 40m
2026-07-24 UAL1861 ONT → IAH Jul 24, 15:13 UTCJul 24, 16:52 UTC1h 39m
2026-07-24 UAL1201 SAN → SFO Jul 24, 11:17 UTCJul 24, 12:50 UTC1h 33m
2026-07-24 UAL1201 SAN → SFO Jul 24, 00:50 UTCJul 24, 13:00 UTC12h 10m
2026-07-23 UAL1381 IAH → SAN Jul 23, 19:20 UTCJul 23, 22:00 UTC2h 40m
2026-07-23 UAL2670 ORD → CLE Jul 23, 15:05 UTCJul 23, 17:40 UTC2h 35m
2026-07-23 UAL410 LAX → LAS Jul 23, 12:55 UTCJul 23, 13:35 UTC40m
2026-07-23 UAL1477 IAH → SAT Jul 23, 00:40 UTCJul 23, 01:10 UTC30m
2026-07-22 UAL2236 SFO → BOS Jul 22, 20:15 UTCJul 22, 23:05 UTC2h 50m
2026-07-22 UAL2606 - Jul 22, 15:30 UTCJul 22, 18:15 UTC2h 45m
2026-07-22 UAL2606 IAH → YYZ Jul 22, 15:28 UTCJul 22, 18:15 UTC2h 47m
2026-07-21 UAL2037 - Jul 21, 13:40 UTCJul 21, 14:45 UTC1h 5m
2026-07-21 UAL1106 ORD → DFW Jul 21, 01:25 UTCJul 21, 02:00 UTC35m
2026-07-21 UAL1106 ORD → DFW Jul 21, 01:38 UTCJul 21, 02:27 UTC49m
2026-07-20 UAL1853 - Jul 20, 22:05 UTCJul 20, 23:10 UTC1h 5m
2026-07-20 UAL1852 LGA → ORD Jul 20, 19:40 UTCJul 20, 20:45 UTC1h 5m
2026-07-20 UAL1852 LGA → ORD Jul 20, 19:40 UTCJul 20, 20:42 UTC1h 2m
2026-07-20 UAL1478 - Jul 20, 14:15 UTCJul 20, 18:00 UTC3h 45m
2026-07-20 UAL241 BNA → EWR Jul 20, 00:15 UTCJul 20, 04:05 UTC3h 50m
2026-07-19 UAL2405 SFO → LAS Jul 19, 18:10 UTCJul 19, 19:25 UTC1h 15m
2026-07-19 UAL646 - Jul 19, 15:05 UTCJul 19, 16:15 UTC1h 10m
2026-07-19 UAL646 IAH → SLP Jul 19, 15:08 UTCJul 19, 16:27 UTC1h 19m
2026-07-19 UAL410 LAX → LAS Jul 19, 13:15 UTCJul 19, 13:45 UTC30m
2026-07-19 UAL1477 - Jul 19, 00:50 UTCJul 19, 01:25 UTC35m
2026-07-18 UAL2178 QRO → IAH Jul 18, 21:10 UTCJul 18, 22:30 UTC1h 20m
2026-07-18 UAL2214 - Jul 18, 18:10 UTCJul 18, 19:20 UTC1h 10m
2026-07-18 UAL2214 IAH → QRO Jul 18, 18:11 UTCJul 18, 19:43 UTC1h 32m
2026-07-18 UAL1524 IAH → EWR Jul 18, 14:15 UTCJul 18, 16:45 UTC2h 30m
2026-07-18 UAL641 ATL → IAD Jul 18, 09:45 UTCJul 18, 11:15 UTC1h 30m
2026-07-17 UAL2081 IAD → ATL Jul 17, 22:20 UTCJul 17, 23:39 UTC1h 20m
2026-07-17 UAL2081 IAD → ATL Jul 17, 22:14 UTCJul 17, 23:40 UTC1h 26m
2026-07-17 UAL2264 SLC → IAD Jul 17, 15:29 UTCJul 17, 19:15 UTC3h 45m
2026-07-17 UAL1710 - Jul 17, 02:15 UTCJul 17, 04:59 UTC2h 45m
2026-07-16 UAL2860 - Jul 16, 22:15 UTCJul 16, 23:59 UTC1h 45m
2026-07-16 UAL1746 - Jul 16, 19:20 UTCJul 16, 20:39 UTC1h 20m
2026-07-16 UAL1288 - Jul 16, 14:10 UTCJul 16, 18:00 UTC3h 50m
2026-07-16 UAL2243 - Jul 16, 02:00 UTCJul 16, 05:00 UTC3h 0m
2026-07-15 UAL654 - Jul 15, 21:15 UTCJul 15, 22:50 UTC1h 35m
2026-07-15 UAL654 IAH → DCA Jul 15, 21:24 UTCJul 15, 22:32 UTC1h 8m

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 N24729 page for operator, model, and routing details .

Mode-S A24CC0 frequently asked

What is Mode-S code A24CC0?
A24CC0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N24729.
Where is Mode-S A24CC0 registered?
Mode-S code A24CC0 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 A24CC0 broadcasting right now?
Yes. Mode-S A24CC0 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A24CC0, octal 50446300, decimal 10,636,480.
What flights does A24CC0 operate?
Mode-S A24CC0 has broadcast 20 distinct callsigns, including UAL2243, UAL1884, UAL1477, UAL654, UAL410.