Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A2B112

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N27258 · BOEING 737 MAX 8 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A2B112
Octal
50530422
Decimal
10,662,162
Country
US
Tail
N27258
Type
B38M
Broadcasting now · callsign UAL2039 · 37,000 ft
Flights observed
453
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Current position

A2B112 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A2B112 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
UAL1138 United Airlines 12 2026-07-23
UAL1632 United Airlines 8 2026-07-22
UAL1272 - 7 2026-07-16
UAL1271 - 7 2026-07-15
UAL1202 United Airlines 7 2026-07-18
UAL206 - 6 2026-07-02
UAL2007 - 6 2026-07-11
UAL1447 - 5 2026-07-18
UAL783 United Airlines 4 2026-04-13
UAL508 United Airlines 4 2026-07-21
UAL278 - 4 2026-07-21
UAL268 United Airlines 4 2026-07-01
UAL2657 - 4 2026-07-15
UAL2353 United Airlines 4 2026-04-15
UAL2313 - 4 2026-07-16
UAL205 - 4 2026-07-07
UAL1975 United Airlines 4 2026-05-26
UAL1751 - 4 2026-07-11
UAL1407 United Airlines 4 2026-04-23
UAL1280 United Airlines 4 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2664 SFO → IAH Jul 26, 18:05 UTCJul 26, 22:30 UTC4h 25m
2026-07-26 UAL2830 IAH → SFO Jul 26, 13:35 UTCJul 26, 14:40 UTC1h 5m
2026-07-26 UAL1863 PUJ → ORD Jul 26, 04:30 UTCJul 26, 05:40 UTC1h 10m
2026-07-25 UAL2478 SAN → ORD Jul 25, 22:55 UTCJul 26, 00:00 UTC1h 5m
2026-07-25 UAL2449 SJC → IAH Jul 25, 20:30 UTCJul 25, 21:30 UTC1h 0m
2026-07-25 UAL2449 SJC → IAH Jul 25, 20:27 UTCJul 25, 21:28 UTC1h 1m
2026-07-25 UAL267 BOS → DEN Jul 25, 13:50 UTCJul 25, 19:15 UTC5h 25m
2026-07-25 UAL8180 YUL → LGA Jul 25, 06:53 UTCJul 25, 11:31 UTC4h 38m
2026-07-25 UAL8180 YUL → LGA Jul 25, 07:00 UTCJul 25, 11:35 UTC4h 35m
2026-07-25 UAL628 MIA → EWR Jul 25, 03:40 UTCJul 25, 04:45 UTC1h 5m
2026-07-24 UAL573 DEN → SFO Jul 24, 17:15 UTCJul 24, 17:50 UTC35m
2026-07-24 UAL571 AUS → SFO Jul 24, 10:45 UTCJul 24, 15:15 UTC4h 30m
2026-07-24 UAL1603 ORD → PHX Jul 24, 04:45 UTCJul 24, 09:00 UTC4h 15m
2026-07-23 UAL234 MSY → IAH Jul 23, 22:15 UTCJul 24, 03:00 UTC4h 45m
2026-07-23 UAL1084 IAH → CMH Jul 23, 16:55 UTCJul 23, 20:50 UTC3h 55m
2026-07-23 UAL1084 IAH → CMH Jul 23, 16:48 UTCJul 23, 20:47 UTC3h 59m
2026-07-23 UAL1138 GUA → LAX Jul 23, 09:40 UTCJul 23, 10:25 UTC45m
2026-07-23 UAL1138 GUA → LAX Jul 23, 09:00 UTCJul 23, 09:10 UTC10m
2026-07-23 UAL1138 GUA → LAX Jul 23, 08:39 UTCJul 23, 13:17 UTC4h 38m
2026-07-23 UAL1138 GUA → LAX Jul 23, 08:39 UTCJul 23, 13:12 UTC4h 33m
2026-07-22 UAL1632 PDX → SFO Jul 22, 22:00 UTCJul 22, 22:15 UTC15m
2026-07-22 UAL1632 PDX → SFO Jul 22, 20:00 UTCJul 22, 20:30 UTC30m
2026-07-22 UAL700 - Jul 22, 14:55 UTCJul 22, 17:40 UTC2h 45m
2026-07-22 UAL2761 AUS → SFO Jul 22, 01:45 UTCJul 22, 04:30 UTC2h 45m
2026-07-21 UAL2341 SFO → IAH Jul 21, 23:00 UTCJul 21, 23:50 UTC50m
2026-07-21 UAL1493 IAH → DEN Jul 21, 20:25 UTCJul 21, 21:15 UTC50m
2026-07-21 UAL508 BOG → IAH Jul 21, 14:05 UTCJul 21, 18:30 UTC4h 25m
2026-07-21 UAL278 - Jul 21, 05:20 UTCJul 21, 07:25 UTC2h 5m
2026-07-21 UAL278 EWR → BOG Jul 21, 05:12 UTCJul 21, 10:03 UTC4h 51m
2026-07-20 UAL1651 EWR → IAH Jul 20, 23:45 UTCJul 21, 02:45 UTC3h 0m
2026-07-20 UAL1213 EWR → ATL Jul 20, 19:15 UTCJul 20, 21:25 UTC2h 10m
2026-07-20 UAL1197 PBI → EWR Jul 20, 14:50 UTCJul 20, 17:15 UTC2h 25m
2026-07-20 UAL1771 - Jul 20, 10:55 UTCJul 20, 13:15 UTC2h 20m
2026-07-20 UAL2601 RSW → EWR Jul 20, 00:40 UTCJul 20, 03:00 UTC2h 20m
2026-07-19 UAL2044 EWR → RSW Jul 19, 20:50 UTCJul 19, 23:30 UTC2h 40m
2026-07-19 UAL674 - Jul 19, 16:30 UTCJul 19, 19:05 UTC2h 35m
2026-07-19 UAL674 CHS → EWR Jul 19, 16:20 UTCJul 19, 19:05 UTC2h 45m
2026-07-19 UAL1108 IAD → CHS Jul 19, 13:03 UTCJul 19, 14:27 UTC1h 24m
2026-07-19 UAL1108 - Jul 19, 13:15 UTCJul 19, 14:30 UTC1h 15m
2026-07-18 UAL2249 PHX → SFO Jul 18, 22:10 UTCJul 19, 01:20 UTC3h 10m
2026-07-18 UAL1447 - Jul 18, 14:55 UTCJul 18, 18:05 UTC3h 10m
2026-07-18 UAL1202 EUG → SFO Jul 18, 05:55 UTCJul 18, 10:25 UTC4h 30m
2026-07-18 UAL1202 EUG → SFO Jul 18, 05:59 UTCJul 18, 11:08 UTC5h 9m
2026-07-17 UAL1546 - Jul 17, 23:20 UTCJul 18, 04:00 UTC4h 41m
2026-07-17 UAL2664 - Jul 17, 16:59 UTCJul 17, 21:50 UTC4h 50m
2026-07-17 UAL488 BUR → SFO Jul 17, 14:44 UTCJul 17, 15:44 UTC1h 0m
2026-07-17 UAL488 BUR → SFO Jul 17, 14:16 UTCJul 17, 15:42 UTC1h 26m
2026-07-17 UAL1367 - Jul 17, 05:30 UTCJul 17, 06:20 UTC50m
2026-07-17 UAL2841 - Jul 17, 02:59 UTCJul 17, 04:10 UTC1h 10m
2026-07-16 UAL2855 - Jul 16, 22:59 UTCJul 17, 00:04 UTC1h 5m

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 N27258 page for operator, model, and routing details .

Mode-S A2B112 frequently asked

What is Mode-S code A2B112?
A2B112 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N27258.
Where is Mode-S A2B112 registered?
Mode-S code A2B112 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 A2B112 broadcasting right now?
Yes. Mode-S A2B112 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2B112, octal 50530422, decimal 10,662,162.
What flights does A2B112 operate?
Mode-S A2B112 has broadcast 20 distinct callsigns, including UAL1138, UAL1632, UAL1272, UAL1271, UAL1202.