Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A0BF26

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N14704 · BOEING 737-700 · operated by UNITED AIRLINES INC

Hex
A0BF26
Octal
50137446
Decimal
10,534,694
Country
US
Tail
N14704
Type
B737
Broadcasting now · callsign UAL2840 · 37,000 ft
Flights observed
198
Distinct callsigns
20
Country
US
Last broadcast
16m ago

Current position

A0BF26 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A0BF26 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
UAL1852 United Airlines 6 2026-05-31
UAL2865 United Airlines 4 2026-05-17
UAL2606 United Airlines 4 2026-06-06
UAL2236 United Airlines 4 2026-06-06
UAL2233 United Airlines 4 2026-05-11
UAL2214 United Airlines 4 2026-05-08
UAL1853 United Airlines 4 2026-05-31
UAL764 United Airlines 3 2026-04-30
UAL685 United Airlines 3 2026-05-08
UAL2178 United Airlines 3 2026-05-26
UAL1798 United Airlines 3 2026-05-08
UAL1655 United Airlines 3 2026-04-30
UAL1477 United Airlines 3 2026-06-06
UAL1451 United Airlines 3 2026-05-20
UAL1317 United Airlines 3 2026-05-17
UAL1069 United Airlines 3 2026-05-17
UAL8152 United Airlines 2 2026-04-28
UAL656 United Airlines 2 2026-04-29
UAL521 United Airlines 2 2026-05-10
UAL490 United Airlines 2 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-08 UAL2840 GUM → SFO Jun 8, 00:25 UTCJun 8, 01:30 UTC1h 5m
2026-06-07 UAL2044 MIA → EWR Jun 7, 19:15 UTCJun 7, 22:00 UTC2h 45m
2026-06-07 UAL1383 IAH → SFO Jun 7, 14:55 UTCJun 7, 18:00 UTC3h 5m
2026-06-07 UAL2453 BIL → DEN Jun 7, 11:20 UTCJun 7, 13:15 UTC1h 55m
2026-06-07 UAL2293 JAX → EWR Jun 7, 01:24 UTCJun 7, 03:10 UTC1h 45m
2026-06-06 UAL2236 SFO → BOS Jun 6, 20:39 UTCJun 7, 00:10 UTC3h 30m
2026-06-06 UAL2606 ORD → LGA Jun 6, 15:44 UTCJun 6, 18:29 UTC2h 45m
2026-06-06 UAL2606 ORD → LGA Jun 6, 15:34 UTCJun 6, 18:28 UTC2h 54m
2026-06-06 UAL410 LAX → LAS Jun 6, 12:54 UTCJun 6, 13:39 UTC45m
2026-06-06 UAL1477 IAH → SAT Jun 6, 00:30 UTCJun 6, 01:15 UTC45m
2026-06-05 UAL1381 IAH → SAN Jun 5, 19:20 UTCJun 5, 22:15 UTC2h 55m
2026-06-05 UAL1381 IAH → SAN Jun 5, 19:07 UTCJun 5, 22:15 UTC3h 8m
2026-06-05 UAL2311 IAH → RNO Jun 5, 15:10 UTCJun 5, 17:35 UTC2h 25m
2026-06-05 UAL2399 MCO → IAH Jun 5, 11:25 UTCJun 5, 13:25 UTC2h 0m
2026-06-05 UAL743 EWR → RSW Jun 5, 00:10 UTCJun 5, 02:15 UTC2h 5m
2026-06-04 UAL1725 SFO → OGG Jun 4, 15:40 UTCJun 4, 20:35 UTC4h 55m
2026-06-04 UAL1409 SBN → SFO Jun 4, 10:35 UTCJun 4, 13:55 UTC3h 20m
2026-06-03 UAL2161 EWR → MCO Jun 3, 22:15 UTCJun 4, 01:40 UTC3h 25m
2026-06-03 UAL1478 SEA → SFO Jun 3, 14:30 UTCJun 3, 18:20 UTC3h 50m
2026-06-02 UAL241 BNA → EWR Jun 2, 23:20 UTCJun 3, 03:15 UTC3h 55m
2026-06-02 UAL241 BNA → EWR Jun 2, 22:46 UTCJun 3, 03:29 UTC4h 43m
2026-06-02 UAL2405 SFO → LAS Jun 2, 15:40 UTCJun 2, 19:25 UTC3h 45m
2026-06-02 UAL2399 MCO → IAH Jun 2, 11:25 UTCJun 2, 13:20 UTC1h 55m
2026-06-02 UAL2682 EWR → RDU Jun 2, 01:45 UTCJun 2, 03:30 UTC1h 45m
2026-05-31 UAL1853 IAH → SFO May 31, 23:00 UTCJun 1, 00:05 UTC1h 5m
2026-05-31 UAL1852 LGA → ORD May 31, 19:55 UTCMay 31, 21:05 UTC1h 10m
2026-05-31 UAL1852 LGA → ORD May 31, 19:55 UTCMay 31, 21:05 UTC1h 10m
2026-05-30 UAL3859 FCO → ORD May 30, 18:45 UTCMay 30, 19:35 UTC50m
2026-05-30 UAL1477 IAH → SAT May 30, 00:05 UTCMay 30, 00:40 UTC35m
2026-05-29 UAL2453 BIL → DEN May 29, 11:50 UTCMay 29, 13:50 UTC2h 0m
2026-05-29 UAL2293 JAX → EWR May 29, 01:20 UTCMay 29, 03:00 UTC1h 40m
2026-05-28 UAL2236 SFO → BOS May 28, 20:25 UTCMay 28, 23:15 UTC2h 50m
2026-05-28 UAL2606 ORD → LGA May 28, 15:55 UTCMay 28, 18:45 UTC2h 50m
2026-05-28 UAL1409 SBN → SFO May 28, 09:55 UTCMay 28, 13:45 UTC3h 50m
2026-05-27 UAL2161 EWR → MCO May 27, 22:35 UTCMay 28, 02:05 UTC3h 30m
2026-05-27 UAL2405 SFO → LAS May 27, 16:05 UTCMay 27, 20:30 UTC4h 25m
2026-05-27 UAL2464 RSW → EWR May 27, 10:40 UTCMay 27, 14:00 UTC3h 20m
2026-05-27 UAL2840 GUM → SFO May 27, 00:10 UTCMay 27, 02:29 UTC2h 20m
2026-05-26 UAL2178 QRO → IAH May 26, 17:55 UTCMay 26, 22:20 UTC4h 25m
2026-05-26 UAL2037 LGA → ORD May 26, 14:05 UTCMay 26, 15:09 UTC1h 5m
2026-05-26 UAL1106 ORD → DFW May 26, 01:44 UTCMay 26, 02:49 UTC1h 5m
2026-05-25 UAL2236 SFO → BOS May 25, 20:10 UTCMay 25, 23:13 UTC3h 3m
2026-05-25 UAL2236 SFO → BOS May 25, 20:09 UTCMay 25, 23:14 UTC3h 5m
2026-05-25 UAL2606 ORD → LGA May 25, 15:35 UTCMay 25, 18:00 UTC2h 25m
2026-05-25 UAL740 SEA → DEN May 25, 13:00 UTCMay 25, 13:40 UTC40m
2026-05-24 UAL497 CVG → DEN May 24, 19:30 UTCMay 24, 21:45 UTC2h 15m
2026-05-24 UAL2242 ORD → SFO May 24, 15:05 UTCMay 24, 17:50 UTC2h 45m
2026-05-23 UAL2044 MIA → EWR May 23, 21:15 UTCMay 24, 00:05 UTC2h 50m
2026-05-23 UAL1383 IAH → SFO May 23, 14:45 UTCMay 23, 17:50 UTC3h 5m
2026-05-22 UAL2217 ORD → PIT May 22, 22:30 UTCMay 23, 01:40 UTC3h 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 N14704 page for operator, model, and routing details .

Mode-S A0BF26 frequently asked

What is Mode-S code A0BF26?
A0BF26 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N14704.
Where is Mode-S A0BF26 registered?
Mode-S code A0BF26 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 A0BF26 broadcasting right now?
Yes. Mode-S A0BF26 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0BF26, octal 50137446, decimal 10,534,694.
What flights does A0BF26 operate?
Mode-S A0BF26 has broadcast 20 distinct callsigns, including UAL1852, UAL2865, UAL2606, UAL2236, UAL2233.