Apparatus

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sensors Mode-S transponder

A070D7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N12754 · BOEING 737-700 · operated by UNITED AIRLINES INC

Hex
A070D7
Octal
50070327
Decimal
10,514,647
Country
US
Tail
N12754
Type
B737
No current signal · last broadcast Jul 26, 19:35 UTC
Flights observed
455
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:35 UTC

Last known position

Most recent position reported by Mode-S A070D7.

Country allocation

The ICAO 24-bit address A070D7 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
UAL241 - 13 2026-07-14
UAL1478 - 12 2026-07-15
UAL1201 - 10 2026-07-17
UAL1861 - 9 2026-07-07
UAL1860 - 9 2026-07-07
UAL1725 - 9 2026-07-14
UAL2346 United Airlines 8 2026-06-30
UAL1852 - 8 2026-07-16
UAL1200 - 7 2026-07-07
UAL2256 - 6 2026-07-13
UAL1853 - 6 2026-07-16
UAL1089 - 6 2026-07-16
UAL1024 - 6 2026-07-16
UAL517 United Airlines 5 2026-05-20
UAL2748 - 5 2026-07-15
UAL2464 United Airlines 5 2026-06-27
UAL2243 United Airlines 5 2026-05-19
UAL2161 - 5 2026-07-13
UAL2026 - 5 2026-07-13
UAL1409 - 5 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1535 EWR → ORD Jul 26, 17:00 UTCJul 26, 19:35 UTC2h 35m
2026-07-26 UAL204 BOS → IAD Jul 26, 12:10 UTCJul 26, 15:35 UTC3h 25m
2026-07-25 UAL1822 SAN → ORD Jul 25, 22:35 UTCJul 26, 02:00 UTC3h 25m
2026-07-25 UAL2264 DEN → MCO Jul 25, 15:45 UTCJul 25, 19:15 UTC3h 30m
2026-07-24 UAL2410 MSY → SFO Jul 24, 23:05 UTCJul 25, 03:05 UTC4h 0m
2026-07-24 UAL1764 SFO → IAH Jul 24, 19:40 UTCJul 24, 20:30 UTC50m
2026-07-24 UAL632 IAD → LAX Jul 24, 16:55 UTCJul 24, 17:50 UTC55m
2026-07-24 UAL2639 IAD → BDL Jul 24, 12:35 UTCJul 24, 15:10 UTC2h 35m
2026-07-23 UAL2116 IAH → SFO Jul 23, 22:25 UTCJul 24, 01:10 UTC2h 45m
2026-07-23 UAL1764 SFO → IAH Jul 23, 19:25 UTCJul 23, 20:30 UTC1h 5m
2026-07-23 UAL632 IAD → LAX Jul 23, 17:00 UTCJul 23, 17:55 UTC55m
2026-07-23 UAL2639 IAD → BDL Jul 23, 12:35 UTCJul 23, 15:05 UTC2h 30m
2026-07-22 UAL2116 IAH → SFO Jul 22, 23:10 UTCJul 23, 02:05 UTC2h 55m
2026-07-22 UAL780 IAD → LAS Jul 22, 19:25 UTCJul 22, 20:15 UTC50m
2026-07-22 UAL1709 EWR → MCO Jul 22, 17:15 UTCJul 22, 18:10 UTC55m
2026-07-22 UAL445 CHS → EWR Jul 22, 14:55 UTCJul 22, 15:45 UTC50m
2026-07-22 UAL445 CHS → EWR Jul 22, 14:49 UTCJul 22, 15:51 UTC1h 2m
2026-07-22 UAL1926 SEA → SFO Jul 22, 12:30 UTCJul 22, 13:25 UTC55m
2026-07-22 UAL1764 SFO → IAH Jul 22, 04:00 UTCJul 22, 05:10 UTC1h 10m
2026-07-22 UAL1764 SFO → IAH Jul 22, 03:16 UTCJul 22, 05:23 UTC2h 7m
2026-07-21 UAL632 IAD → LAX Jul 21, 16:56 UTCJul 21, 17:54 UTC58m
2026-07-21 UAL2639 IAD → BDL Jul 21, 12:40 UTCJul 21, 15:30 UTC2h 50m
2026-07-20 UAL2116 IAH → SFO Jul 20, 22:30 UTCJul 21, 01:05 UTC2h 34m
2026-07-20 UAL780 IAD → LAS Jul 20, 19:40 UTCJul 20, 20:30 UTC50m
2026-07-20 UAL1709 IAD → CLE Jul 20, 16:55 UTCJul 20, 17:40 UTC45m
2026-07-20 UAL1709 IAD → CLE Jul 20, 17:01 UTCJul 20, 17:40 UTC39m
2026-07-20 UAL471 IAD → BOS Jul 20, 12:10 UTCJul 20, 15:10 UTC3h 0m
2026-07-19 UAL1869 IAD → SAT Jul 19, 22:10 UTCJul 20, 01:05 UTC2h 55m
2026-07-19 UAL204 BOS → IAD Jul 19, 17:00 UTCJul 19, 20:35 UTC3h 35m
2026-07-19 UAL1822 IAD → ABQ Jul 19, 01:20 UTCJul 19, 04:50 UTC3h 30m
2026-07-18 UAL2366 SFO → LAS Jul 18, 19:15 UTCJul 18, 22:00 UTC2h 45m
2026-07-18 UAL580 BTV → ORD Jul 18, 14:05 UTCJul 18, 16:10 UTC2h 5m
2026-07-18 UAL580 BTV → ORD Jul 18, 14:02 UTCJul 18, 16:11 UTC2h 9m
2026-07-17 UAL349 - Jul 17, 23:35 UTCJul 18, 01:30 UTC1h 55m
2026-07-17 UAL497 CVG → DEN Jul 17, 19:15 UTCJul 17, 21:55 UTC2h 40m
2026-07-17 UAL756 - Jul 17, 15:15 UTCJul 17, 17:44 UTC2h 30m
2026-07-17 UAL756 IAH → SLC Jul 17, 15:05 UTCJul 17, 17:45 UTC2h 40m
2026-07-17 UAL1201 - Jul 17, 00:50 UTCJul 17, 13:05 UTC12h 15m
2026-07-16 UAL1853 - Jul 16, 22:05 UTCJul 16, 23:05 UTC1h 0m
2026-07-16 UAL1852 - Jul 16, 19:30 UTCJul 16, 20:35 UTC1h 5m
2026-07-16 UAL1852 IAH → MTY Jul 16, 19:40 UTCJul 16, 20:35 UTC55m
2026-07-16 UAL1089 - Jul 16, 15:49 UTCJul 16, 17:30 UTC1h 40m
2026-07-16 UAL1024 - Jul 16, 12:30 UTCJul 16, 14:15 UTC1h 45m
2026-07-16 UAL2430 - Jul 16, 00:50 UTCJul 16, 03:50 UTC3h 0m
2026-07-15 UAL2748 - Jul 15, 20:35 UTCJul 15, 23:35 UTC3h 0m
2026-07-15 UAL2748 IAH → PHL Jul 15, 20:20 UTCJul 15, 23:33 UTC3h 13m
2026-07-15 UAL1478 - Jul 15, 14:20 UTCJul 15, 18:35 UTC4h 15m
2026-07-14 UAL241 - Jul 14, 22:25 UTCJul 15, 02:10 UTC3h 44m
2026-07-14 UAL1725 GDL → IAH Jul 14, 19:01 UTCJul 14, 20:45 UTC1h 44m
2026-07-14 UAL1725 - Jul 14, 15:40 UTCJul 14, 20:50 UTC5h 10m

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 N12754 page for operator, model, and routing details .

Mode-S A070D7 frequently asked

What is Mode-S code A070D7?
A070D7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N12754.
Where is Mode-S A070D7 registered?
Mode-S code A070D7 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 A070D7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A070D7, octal 50070327, decimal 10,514,647.
What flights does A070D7 operate?
Mode-S A070D7 has broadcast 20 distinct callsigns, including UAL241, UAL1478, UAL1201, UAL1861, UAL1860.