Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A1270A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17321 · BOEING 737 MAX 8 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A1270A
Octal
50223412
Decimal
10,561,290
Country
US
Tail
N17321
Type
B38M
No current signal · last broadcast 6h ago
Flights observed
161
Distinct callsigns
20
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S A1270A.

Country allocation

The ICAO 24-bit address A1270A 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
UAL2229 United Airlines 4 2026-05-16
UAL2854 United Airlines 3 2026-06-03
UAL1585 United Airlines 3 2026-05-17
UAL1353 United Airlines 3 2026-06-10
UAL1224 United Airlines 3 2026-05-07
UAL1219 United Airlines 3 2026-06-05
UAL1213 United Airlines 3 2026-05-07
UAL8186 United Airlines 2 2026-05-12
UAL598 United Airlines 2 2026-05-21
UAL500 United Airlines 2 2026-05-14
UAL488 United Airlines 2 2026-05-14
UAL4207 United Airlines 2 2026-04-15
UAL376 United Airlines 2 2026-05-09
UAL2804 United Airlines 2 2026-05-28
UAL2641 United Airlines 2 2026-05-08
UAL2438 United Airlines 2 2026-05-19
UAL2420 United Airlines 2 2026-05-29
UAL2386 United Airlines 2 2026-06-03
UAL2316 United Airlines 2 2026-05-08
UAL2213 United Airlines 2 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-10 UAL1353 IAD → EWR Jun 10, 23:45 UTCJun 11, 02:05 UTC2h 20m
2026-06-10 UAL1353 IAD → EWR Jun 10, 23:41 UTCJun 11, 02:05 UTC2h 24m
2026-06-10 UAL2146 LAX → DEN Jun 10, 19:25 UTCJun 10, 21:40 UTC2h 15m
2026-06-10 UAL1914 PDX → SFO Jun 10, 12:45 UTCJun 10, 17:35 UTC4h 50m
2026-06-10 UAL572 ORD → MSN Jun 10, 04:10 UTCJun 10, 10:45 UTC6h 35m
2026-06-09 UAL2369 MSY → IAH Jun 9, 20:10 UTCJun 10, 02:25 UTC6h 15m
2026-06-09 UAL1005 EWR → MCO Jun 9, 14:10 UTCJun 9, 18:25 UTC4h 15m
2026-06-09 UAL1004 LAX → ITO Jun 9, 05:00 UTCJun 9, 07:40 UTC2h 40m
2026-06-09 UAL1004 LAX → ITO Jun 9, 05:02 UTCJun 9, 09:33 UTC4h 31m
2026-06-08 UAL1099 SJO → IAH Jun 8, 23:15 UTCJun 9, 01:45 UTC2h 30m
2026-06-08 UAL1096 IAH → SJO Jun 8, 15:15 UTCJun 8, 17:10 UTC1h 55m
2026-06-08 UAL1096 IAH → SJO Jun 8, 14:58 UTCJun 8, 18:24 UTC3h 26m
2026-06-08 UAL2074 IAD → DEN Jun 8, 11:05 UTCJun 8, 13:15 UTC2h 10m
2026-06-08 UAL1829 EWR → SFO Jun 8, 00:30 UTCJun 8, 02:25 UTC1h 55m
2026-06-07 UAL2208 FLL → EWR Jun 7, 17:30 UTCJun 7, 21:50 UTC4h 20m
2026-06-07 UAL2208 FLL → EWR Jun 7, 17:33 UTCJun 7, 21:46 UTC4h 13m
2026-06-07 UAL1443 IAD → STT Jun 7, 12:45 UTCJun 7, 16:00 UTC3h 15m
2026-06-07 UAL1015 EWR → MIA Jun 7, 03:25 UTCJun 7, 04:40 UTC1h 15m
2026-06-06 UAL474 MEX → ORD Jun 6, 21:00 UTCJun 7, 00:25 UTC3h 25m
2026-06-06 UAL359 ORD → MEX Jun 6, 15:19 UTCJun 6, 18:59 UTC3h 40m
2026-06-06 UAL1994 SFO → PDX Jun 6, 11:39 UTCJun 6, 13:25 UTC1h 45m
2026-06-06 UAL2148 EWR → SAT Jun 6, 03:05 UTCJun 6, 03:50 UTC45m
2026-06-05 UAL1352 IAH → CMH Jun 5, 21:50 UTCJun 6, 01:25 UTC3h 35m
2026-06-05 UAL1320 SFO → ONT Jun 5, 17:45 UTCJun 5, 19:40 UTC1h 55m
2026-06-05 UAL1219 ATL → DEN Jun 5, 13:05 UTCJun 5, 15:55 UTC2h 50m
2026-06-05 UAL2097 SFO → EWR Jun 5, 06:30 UTCJun 5, 10:45 UTC4h 15m
2026-06-05 UAL2482 SFO → HNL Jun 5, 00:50 UTCJun 5, 04:40 UTC3h 50m
2026-06-04 UAL2090 IAH → PHL Jun 4, 19:45 UTCJun 4, 23:15 UTC3h 30m
2026-06-04 UAL369 BOS → EWR Jun 4, 12:20 UTCJun 4, 17:25 UTC5h 5m
2026-06-03 UAL2386 EWR → TPA Jun 3, 21:35 UTCJun 4, 02:15 UTC4h 40m
2026-06-03 UAL267 BOS → DEN Jun 3, 14:15 UTCJun 3, 20:00 UTC5h 45m
2026-06-03 UAL2854 EWR → BZN Jun 3, 06:40 UTCJun 3, 11:40 UTC5h 0m
2026-06-03 UAL1083 EWR → JAX Jun 3, 02:30 UTCJun 3, 04:20 UTC1h 50m
2026-06-02 UAL1086 BOS → IAH Jun 2, 22:30 UTCJun 3, 00:55 UTC2h 25m
2026-06-02 UAL1086 BOS → IAH Jun 2, 22:36 UTCJun 3, 00:55 UTC2h 19m
2026-06-02 UAL2213 LAX → EWR Jun 2, 16:48 UTCJun 2, 20:00 UTC3h 12m
2026-06-02 UAL2213 LAX → EWR Jun 2, 16:40 UTCJun 2, 20:05 UTC3h 25m
2026-06-02 UAL2092 SFO → PHX Jun 2, 13:15 UTCJun 2, 15:05 UTC1h 50m
2026-05-31 UAL2426 IAH → BOS May 31, 17:55 UTCMay 31, 21:15 UTC3h 20m
2026-05-31 UAL2423 YVR → SFO May 31, 10:55 UTCMay 31, 16:10 UTC5h 15m
2026-05-30 UAL1446 LIR → EWR May 30, 22:43 UTCMay 31, 03:07 UTC4h 24m
2026-05-30 UAL1917 DEN → LIR May 30, 16:25 UTCMay 31, 01:11 UTC8h 46m
2026-05-30 UAL1716 PHL → DEN May 30, 12:15 UTCMay 30, 14:30 UTC2h 15m
2026-05-29 UAL1300 ATL → ORD May 29, 23:55 UTCMay 30, 02:15 UTC2h 20m
2026-05-29 UAL1306 EWR → CHS May 29, 19:40 UTCMay 29, 22:45 UTC3h 5m
2026-05-29 UAL2420 RSW → IAH May 29, 16:06 UTCMay 29, 18:06 UTC2h 0m
2026-05-29 UAL2420 RSW → IAH May 29, 16:00 UTCMay 29, 18:00 UTC2h 0m
2026-05-29 UAL494 SNA → EWR May 29, 09:10 UTCMay 29, 14:25 UTC5h 15m
2026-05-29 UAL250 BOS → IAH May 29, 01:50 UTCMay 29, 06:35 UTC4h 45m
2026-05-28 UAL287 EWR → BOS May 28, 19:45 UTCMay 28, 23:30 UTC3h 45m

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 N17321 page for operator, model, and routing details .

Mode-S A1270A frequently asked

What is Mode-S code A1270A?
A1270A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17321.
Where is Mode-S A1270A registered?
Mode-S code A1270A 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 A1270A broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1270A, octal 50223412, decimal 10,561,290.
What flights does A1270A operate?
Mode-S A1270A has broadcast 20 distinct callsigns, including UAL2229, UAL2854, UAL1585, UAL1353, UAL1224.