Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A12F70

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17594 · BOEING 737-900 · operated by BANK OF UTAH TRUSTEE

Hex
A12F70
Octal
50227560
Decimal
10,563,440
Country
US
Tail
N17594
Type
B739
Broadcasting now · callsign UAL2836 · 35,000 ft
Flights observed
390
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Current position

A12F70 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A12F70 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
UAL1648 - 7 2026-06-21
UAL2372 United Airlines 6 2026-07-21
UAL1461 - 5 2026-07-20
UAL2603 United Airlines 4 2026-07-19
UAL2110 United Airlines 4 2026-05-11
UAL2107 - 4 2026-07-14
UAL1826 United Airlines 4 2026-04-14
UAL1804 United Airlines 4 2026-06-21
UAL1670 - 4 2026-07-20
UAL1556 United Airlines 4 2026-05-12
UAL1499 United Airlines 4 2026-05-11
UAL689 United Airlines 3 2026-05-23
UAL555 United Airlines 3 2026-04-16
UAL327 United Airlines 3 2026-04-15
UAL312 United Airlines 3 2026-07-25
UAL2690 United Airlines 3 2026-07-26
UAL2669 United Airlines 3 2026-05-09
UAL2417 - 3 2026-07-15
UAL2407 - 3 2026-07-13
UAL2398 United Airlines 3 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2690 LAS → IAH Jul 26, 18:20 UTCJul 26, 21:15 UTC2h 55m
2026-07-26 UAL1886 IAH → SFO Jul 26, 12:30 UTCJul 26, 15:35 UTC3h 5m
2026-07-26 UAL1986 RDM → SFO Jul 26, 03:00 UTCJul 26, 05:30 UTC2h 30m
2026-07-25 UAL1820 PLS → IAD Jul 25, 21:28 UTCJul 26, 00:09 UTC2h 41m
2026-07-25 UAL1921 ORD → IAD Jul 25, 16:25 UTCJul 26, 00:10 UTC7h 45m
2026-07-25 UAL1878 LGA → ORD Jul 25, 11:45 UTCJul 25, 14:15 UTC2h 30m
2026-07-25 UAL312 DSM → ORD Jul 25, 01:35 UTCJul 25, 03:20 UTC1h 45m
2026-07-25 UAL312 DSM → ORD Jul 25, 01:20 UTCJul 25, 03:25 UTC2h 5m
2026-07-24 UAL1664 PUJ → ORD Jul 24, 20:40 UTCJul 24, 22:40 UTC2h 0m
2026-07-24 UAL1664 PUJ → ORD Jul 24, 18:25 UTCJul 24, 22:23 UTC3h 58m
2026-07-24 UAL1661 IAD → PUJ Jul 24, 13:04 UTCJul 24, 16:20 UTC3h 16m
2026-07-24 UAL1661 IAD → PUJ Jul 24, 13:10 UTCJul 24, 14:10 UTC1h 0m
2026-07-24 UAL1734 SAN → SFO Jul 24, 09:55 UTCJul 24, 11:00 UTC1h 5m
2026-07-24 UAL755 IAD → BOS Jul 24, 02:25 UTCJul 24, 03:40 UTC1h 15m
2026-07-24 UAL755 IAD → BOS Jul 24, 02:25 UTCJul 24, 03:26 UTC1h 1m
2026-07-23 UAL1133 SJC → DEN Jul 23, 21:40 UTCJul 24, 00:35 UTC2h 55m
2026-07-23 UAL1276 LAX → CUN Jul 23, 15:55 UTCJul 23, 20:15 UTC4h 20m
2026-07-23 UAL1756 - Jul 23, 13:00 UTCJul 23, 13:45 UTC45m
2026-07-23 UAL374 EWR → PBI Jul 23, 03:05 UTCJul 23, 03:35 UTC30m
2026-07-22 UAL1195 DTW → ORD Jul 22, 23:15 UTCJul 23, 01:30 UTC2h 15m
2026-07-22 UAL1150 PHX → EWR Jul 22, 19:05 UTCJul 22, 21:10 UTC2h 5m
2026-07-22 UAL426 - Jul 22, 15:55 UTCJul 22, 17:00 UTC1h 5m
2026-07-22 UAL1344 - Jul 22, 12:45 UTCJul 22, 13:40 UTC55m
2026-07-21 UAL651T FLL → ORD Jul 21, 23:50 UTCJul 22, 02:50 UTC3h 0m
2026-07-21 UAL651T FLL → ORD Jul 21, 23:57 UTCJul 22, 02:41 UTC2h 44m
2026-07-21 UAL8235 CMH → ORD Jul 21, 19:40 UTCJul 21, 22:20 UTC2h 40m
2026-07-21 UAL426 - Jul 21, 15:15 UTCJul 21, 16:05 UTC50m
2026-07-21 UAL1344 - Jul 21, 12:40 UTCJul 21, 13:25 UTC45m
2026-07-21 UAL1962 MCO → ORD Jul 21, 06:55 UTCJul 21, 10:30 UTC3h 35m
2026-07-21 UAL2372 LGA → IAH Jul 21, 03:50 UTCJul 21, 04:25 UTC35m
2026-07-20 UAL2372 LGA → IAH Jul 20, 23:15 UTCJul 20, 23:30 UTC15m
2026-07-20 UAL8273 YQM → YYZ Jul 20, 21:35 UTCJul 20, 21:45 UTC10m
2026-07-20 UAL8273 YQM → YYZ Jul 20, 16:35 UTCJul 20, 17:05 UTC30m
2026-07-20 UAL1670 - Jul 20, 08:15 UTCJul 20, 12:55 UTC4h 40m
2026-07-20 UAL1461 - Jul 20, 00:05 UTCJul 20, 02:25 UTC2h 20m
2026-07-19 UAL1123 - Jul 19, 20:00 UTCJul 19, 21:50 UTC1h 50m
2026-07-19 UAL1054 EWR → CUN Jul 19, 15:05 UTCJul 19, 18:24 UTC3h 19m
2026-07-19 UAL1054 EWR → CUN Jul 19, 15:00 UTCJul 19, 18:30 UTC3h 30m
2026-07-19 UAL2603 LAX → SFO Jul 19, 11:00 UTCJul 19, 13:15 UTC2h 15m
2026-07-19 UAL2603 LAX → SFO Jul 19, 10:50 UTCJul 19, 13:10 UTC2h 20m
2026-07-18 UAL2294 ORD → FLL Jul 18, 23:40 UTCJul 19, 02:20 UTC2h 40m
2026-07-18 UAL2458 - Jul 18, 19:15 UTCJul 18, 21:30 UTC2h 15m
2026-07-18 UAL2458 IAH → ORD Jul 18, 19:18 UTCJul 18, 21:15 UTC1h 57m
2026-07-18 UAL1249 PTY → IAH Jul 18, 13:54 UTCJul 18, 17:14 UTC3h 20m
2026-07-17 UAL1249 - Jul 17, 18:05 UTCJul 18, 17:15 UTC23h 11m
2026-07-17 UAL1250 - Jul 17, 17:30 UTCJul 18, 16:00 UTC22h 31m
2026-07-17 UAL1644 SJU → IAH Jul 17, 13:45 UTCJul 17, 15:40 UTC1h 55m
2026-07-17 UAL1644 SJU → IAH Jul 17, 11:20 UTCJul 17, 11:35 UTC15m
2026-07-17 UAL1497 - Jul 17, 09:10 UTCJul 17, 09:20 UTC10m
2026-07-17 UAL1497 - Jul 17, 05:20 UTCJul 17, 07:30 UTC2h 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 N17594 page for operator, model, and routing details .

Mode-S A12F70 frequently asked

What is Mode-S code A12F70?
A12F70 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17594.
Where is Mode-S A12F70 registered?
Mode-S code A12F70 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 A12F70 broadcasting right now?
Yes. Mode-S A12F70 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A12F70, octal 50227560, decimal 10,563,440.
What flights does A12F70 operate?
Mode-S A12F70 has broadcast 20 distinct callsigns, including UAL1648, UAL2372, UAL1461, UAL2603, UAL2110.