Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A2B176

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N27283 · BOEING 737 MAX 8 · operated by UNITED AIRLINES INC

Hex
A2B176
Octal
50530566
Decimal
10,662,262
Country
US
Tail
N27283
Type
B38M
No current signal · last broadcast Jul 26, 19:30 UTC
Flights observed
468
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:30 UTC

Last known position

Most recent position reported by Mode-S A2B176.

Country allocation

The ICAO 24-bit address A2B176 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
UAL1214 - 8 2026-06-22
UAL1009 United Airlines 8 2026-07-23
UAL1368 United Airlines 6 2026-06-04
UAL1008 United Airlines 6 2026-07-23
UAL275 United Airlines 5 2026-05-08
UAL2423 United Airlines 5 2026-06-28
UAL1744 United Airlines 5 2026-05-01
UAL1538 United Airlines 5 2026-04-24
UAL841 United Airlines 4 2026-05-21
UAL834 United Airlines 4 2026-06-23
UAL621 United Airlines 4 2026-06-21
UAL437 United Airlines 4 2026-05-19
UAL258 - 4 2026-07-08
UAL2426 - 4 2026-06-28
UAL231 - 4 2026-06-19
UAL2021 United Airlines 4 2026-06-04
UAL1908 United Airlines 4 2026-06-25
UAL1676 United Airlines 4 2026-05-19
UAL1445 - 4 2026-06-25
UAL1352 United Airlines 4 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2231 MEM → EWR Jul 26, 17:15 UTCJul 26, 19:30 UTC2h 15m
2026-07-26 UAL2228 - Jul 26, 13:40 UTCJul 26, 15:15 UTC1h 35m
2026-07-26 UAL2793 IAD → EWR Jul 26, 01:08 UTCJul 26, 02:15 UTC1h 7m
2026-07-26 UAL2793 IAD → EWR Jul 26, 01:05 UTCJul 26, 02:15 UTC1h 10m
2026-07-25 UAL1683 ORD → CMH Jul 25, 19:05 UTCJul 25, 22:40 UTC3h 35m
2026-07-25 UAL1462 SFO → IAH Jul 25, 13:21 UTCJul 25, 16:33 UTC3h 12m
2026-07-25 UAL1462 SFO → IAH Jul 25, 13:20 UTCJul 25, 15:30 UTC2h 10m
2026-07-25 UAL1681 JAC → SFO Jul 25, 06:00 UTCJul 25, 10:15 UTC4h 15m
2026-07-24 UAL8149 EWR → YUL Jul 24, 21:10 UTCJul 25, 01:55 UTC4h 45m
2026-07-24 UAL1900 COS → DEN Jul 24, 14:45 UTCJul 24, 19:05 UTC4h 20m
2026-07-24 UAL2820 IAH → SFO Jul 24, 02:00 UTCJul 24, 05:55 UTC3h 55m
2026-07-24 UAL2820 IAH → SFO Jul 24, 01:53 UTCJul 24, 05:57 UTC4h 4m
2026-07-23 UAL1009 EWR → MCO Jul 23, 23:40 UTCJul 24, 00:05 UTC25m
2026-07-23 UAL1009 EWR → MCO Jul 23, 19:55 UTCJul 24, 00:05 UTC4h 10m
2026-07-23 UAL1009 EWR → MCO Jul 23, 19:48 UTCJul 23, 23:24 UTC3h 36m
2026-07-23 UAL1008 BOS → SFO Jul 23, 14:10 UTCJul 23, 18:10 UTC4h 0m
2026-07-22 UAL1352 IAH → CMH Jul 22, 21:30 UTCJul 23, 01:00 UTC3h 30m
2026-07-22 UAL1320 SFO → ONT Jul 22, 18:10 UTCJul 22, 20:05 UTC1h 55m
2026-07-22 UAL2307 DEN → LIH Jul 22, 12:15 UTCJul 22, 16:15 UTC4h 0m
2026-07-22 UAL2436 DEN → MSY Jul 22, 02:05 UTCJul 22, 04:25 UTC2h 20m
2026-07-21 UAL2866 LAX → CLE Jul 21, 23:00 UTCJul 22, 00:45 UTC1h 45m
2026-07-21 UAL2744 MCO → EWR Jul 21, 19:30 UTCJul 21, 20:55 UTC1h 25m
2026-07-21 UAL369 DCA → SFO Jul 21, 12:30 UTCJul 21, 17:30 UTC5h 0m
2026-07-20 UAL2386 EWR → TPA Jul 20, 22:55 UTCJul 21, 03:45 UTC4h 49m
2026-07-20 UAL2313 ORD → IAH Jul 20, 15:55 UTCJul 20, 21:05 UTC5h 10m
2026-07-20 UAL2313 ORD → IAH Jul 20, 15:05 UTCJul 20, 15:15 UTC10m
2026-07-20 UAL2312 SFO → DEN Jul 20, 07:15 UTCJul 20, 13:15 UTC6h 0m
2026-07-20 UAL1299 - Jul 20, 01:00 UTCJul 20, 05:35 UTC4h 35m
2026-07-20 UAL1299 LIH → SFO Jul 20, 00:42 UTCJul 20, 05:36 UTC4h 54m
2026-07-19 UAL1298 - Jul 19, 18:05 UTCJul 19, 23:00 UTC4h 55m
2026-07-19 UAL3917 - Jul 19, 15:55 UTCJul 19, 16:50 UTC55m
2026-07-18 UAL1350 - Jul 18, 22:50 UTCJul 19, 04:05 UTC5h 15m
2026-07-18 UAL1064 - Jul 18, 14:20 UTCJul 18, 18:40 UTC4h 20m
2026-07-18 UAL1064 MEX → EWR Jul 18, 13:59 UTCJul 18, 18:37 UTC4h 38m
2026-07-17 UAL1065 EWR → MEX Jul 17, 20:50 UTCJul 18, 01:05 UTC4h 15m
2026-07-17 UAL2036 - Jul 17, 01:29 UTCJul 17, 02:25 UTC55m
2026-07-16 UAL2036 - Jul 16, 22:55 UTCJul 16, 23:05 UTC10m
2026-07-16 UAL2036 SJU → EWR Jul 16, 22:58 UTCJul 17, 02:22 UTC3h 24m
2026-07-16 UAL1339 - Jul 16, 16:05 UTCJul 16, 19:40 UTC3h 35m
2026-07-14 UAL2614 - Jul 14, 07:10 UTCJul 14, 11:45 UTC4h 35m
2026-07-13 UAL2073 IAD → ANC Jul 13, 22:30 UTCJul 14, 05:40 UTC7h 10m
2026-07-13 UAL2463 SEA → IAD Jul 13, 15:30 UTCJul 13, 19:55 UTC4h 25m
2026-07-13 UAL2651 DEN → SEA Jul 13, 03:30 UTCJul 13, 05:45 UTC2h 15m
2026-07-12 UAL1918 - Jul 12, 21:25 UTCJul 13, 01:35 UTC4h 10m
2026-07-12 UAL1876 - Jul 12, 15:01 UTCJul 12, 19:20 UTC4h 20m
2026-07-12 UAL1343 - Jul 12, 10:15 UTCJul 12, 12:30 UTC2h 15m
2026-07-12 UAL1324 EWR → SRQ Jul 12, 00:49 UTCJul 12, 03:30 UTC2h 41m
2026-07-12 UAL1324 EWR → SRQ Jul 12, 01:00 UTCJul 12, 03:30 UTC2h 30m
2026-07-11 UAL1784 LAS → EWR Jul 11, 17:15 UTCJul 11, 21:45 UTC4h 30m
2026-07-11 UAL679 LAX → LAS Jul 11, 02:25 UTCJul 11, 03:15 UTC50m

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 N27283 page for operator, model, and routing details .

Mode-S A2B176 frequently asked

What is Mode-S code A2B176?
A2B176 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N27283.
Where is Mode-S A2B176 registered?
Mode-S code A2B176 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 A2B176 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2B176, octal 50530566, decimal 10,662,262.
What flights does A2B176 operate?
Mode-S A2B176 has broadcast 20 distinct callsigns, including UAL1214, UAL1009, UAL1368, UAL1008, UAL275.