Apparatus

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sensors Mode-S transponder

A91B2B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N686TA · AIRBUS A-320 · operated by UMB BANK NA TRUSTEE

Hex
A91B2B
Octal
52215453
Decimal
11,082,539
Country
US
Tail
N686TA
Type
A320
Broadcasting now · callsign TAI531 · 35,050 ft
Flights observed
456
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:55 UTC

Current position

A91B2B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A91B2B 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
LRC650 LACSA 54 2026-07-24
LRC651 LACSA 49 2026-07-24
TAI554 Avianca El Salvador 30 2026-07-24
TAI555 Avianca El Salvador 29 2026-07-22
GUG743 - 19 2026-07-01
GUG700 - 16 2026-07-17
GUG701 - 15 2026-07-17
GUG742 Aviateca 13 2026-06-02
GUG705 - 13 2026-07-01
GUG703 - 13 2026-07-02
GUG702 - 13 2026-07-02
GUG704 - 12 2026-07-01
TAI579 Avianca El Salvador 11 2026-07-17
TAI578 - 10 2026-07-17
LRC670 - 7 2026-07-14
LRC660 - 7 2026-07-06
TAI591 - 6 2026-06-19
TAI572 Avianca El Salvador 6 2026-07-23
LRC671 - 6 2026-07-14
LRC661 - 6 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TAI397 MIA → MGA Jul 26, 19:10 UTCJul 26, 20:55 UTC1h 45m
2026-07-25 TAI393 MIA → MGA Jul 25, 22:30 UTCJul 26, 16:10 UTC17h 41m
2026-07-25 TAI392 MGA → MIA Jul 25, 10:45 UTCJul 25, 20:10 UTC9h 25m
2026-07-24 TAI450 MGA → MIA Jul 24, 21:45 UTCJul 25, 03:30 UTC5h 45m
2026-07-24 LRC651 CUN → SAL Jul 24, 19:10 UTCJul 24, 20:20 UTC1h 10m
2026-07-24 LRC650 SJO → GUA Jul 24, 16:25 UTCJul 24, 17:55 UTC1h 30m
2026-07-24 TAI554 SAL → GUA Jul 24, 14:30 UTCJul 24, 14:50 UTC20m
2026-07-23 LRC651 CUN → SAL Jul 23, 20:55 UTCJul 23, 21:50 UTC55m
2026-07-23 LRC650 SJO → GUA Jul 23, 18:20 UTCJul 23, 19:25 UTC1h 5m
2026-07-23 TAI573 GUA → SAL Jul 23, 16:15 UTCJul 23, 16:30 UTC15m
2026-07-23 TAI572 GUA → IAD Jul 23, 14:30 UTCJul 23, 14:55 UTC25m
2026-07-23 TAI317 SAL → PTY Jul 23, 05:40 UTCJul 23, 11:30 UTC5h 50m
2026-07-22 TAI555 IAD → GUA Jul 22, 22:10 UTCJul 22, 22:25 UTC15m
2026-07-22 LRC651 CUN → SAL Jul 22, 19:40 UTCJul 22, 20:55 UTC1h 15m
2026-07-22 LRC650 SJO → GUA Jul 22, 16:50 UTCJul 22, 18:10 UTC1h 20m
2026-07-22 TAI554 SAL → GUA Jul 22, 14:35 UTCJul 22, 14:55 UTC20m
2026-07-21 TAI443 DFW → SAL Jul 21, 23:35 UTCJul 22, 02:20 UTC2h 45m
2026-07-21 TAI442 SAL → DFW Jul 21, 18:30 UTCJul 21, 21:15 UTC2h 45m
2026-07-20 TAI555 - Jul 20, 21:55 UTCJul 20, 22:10 UTC15m
2026-07-20 LRC651 CUN → SAL Jul 20, 19:15 UTCJul 20, 20:25 UTC1h 10m
2026-07-20 LRC650 SJO → GUA Jul 20, 16:30 UTCJul 20, 17:45 UTC1h 15m
2026-07-20 TAI554 SAL → GUA Jul 20, 14:30 UTCJul 20, 14:50 UTC20m
2026-07-19 TAI425 - Jul 19, 23:35 UTCJul 20, 01:50 UTC2h 15m
2026-07-19 TAI424 SAL → IAH Jul 19, 18:35 UTCJul 19, 20:55 UTC2h 20m
2026-07-19 TAI569 - Jul 19, 11:25 UTCJul 19, 15:35 UTC4h 10m
2026-07-19 TAI568 - Jul 19, 05:10 UTCJul 19, 09:00 UTC3h 50m
2026-07-18 TAI445 - Jul 18, 21:15 UTCJul 19, 02:25 UTC5h 10m
2026-07-18 TAI444 SAL → BOS Jul 18, 14:15 UTCJul 18, 19:10 UTC4h 55m
2026-07-17 TAI555 - Jul 17, 22:15 UTCJul 17, 22:29 UTC15m
2026-07-17 LRC651 CUN → SAL Jul 17, 19:40 UTCJul 17, 20:55 UTC1h 15m
2026-07-17 LRC650 SJO → GUA Jul 17, 17:05 UTCJul 17, 18:19 UTC1h 15m
2026-07-17 TAI554 - Jul 17, 15:25 UTCJul 17, 15:49 UTC25m
2026-07-17 TAI579 GUA → SAL Jul 17, 13:25 UTCJul 17, 13:40 UTC15m
2026-07-17 GUG701 - Jul 17, 11:39 UTCJul 17, 12:04 UTC25m
2026-07-17 GUG700 - Jul 17, 07:20 UTCJul 17, 07:35 UTC15m
2026-07-17 TAI578 - Jul 17, 04:59 UTCJul 17, 05:20 UTC20m
2026-07-16 LRC651 - Jul 16, 21:05 UTCJul 16, 22:10 UTC1h 5m
2026-07-16 LRC650 - Jul 16, 18:29 UTCJul 16, 19:35 UTC1h 5m
2026-07-16 TAI569 - Jul 16, 11:25 UTCJul 16, 15:25 UTC4h 0m
2026-07-16 TAI568 - Jul 16, 05:05 UTCJul 16, 08:55 UTC3h 50m
2026-07-15 TAI445 - Jul 15, 21:25 UTCJul 16, 01:55 UTC4h 30m
2026-07-15 TAI445 BOS → BOS Jul 15, 21:00 UTCJul 15, 21:05 UTC5m
2026-07-15 TAI444 - Jul 15, 14:20 UTCJul 15, 18:45 UTC4h 25m
2026-07-14 LRC671 - Jul 14, 07:55 UTCJul 14, 11:50 UTC3h 55m
2026-07-14 LRC670 - Jul 14, 01:50 UTCJul 14, 05:50 UTC4h 0m
2026-07-13 TAI555 - Jul 13, 21:40 UTCJul 13, 22:00 UTC20m
2026-07-13 LRC651 CUN → GUA Jul 13, 19:10 UTCJul 13, 20:25 UTC1h 15m
2026-07-13 LRC650 GUA → CUN Jul 13, 16:30 UTCJul 13, 17:45 UTC1h 15m
2026-07-13 TAI554 - Jul 13, 14:40 UTCJul 13, 15:05 UTC25m
2026-07-12 TAI555 - Jul 12, 21:55 UTCJul 12, 22:10 UTC15m

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 N686TA page for operator, model, and routing details .

Mode-S A91B2B frequently asked

What is Mode-S code A91B2B?
A91B2B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N686TA.
Where is Mode-S A91B2B registered?
Mode-S code A91B2B 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 A91B2B broadcasting right now?
Yes. Mode-S A91B2B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A91B2B, octal 52215453, decimal 11,082,539.
What flights does A91B2B operate?
Mode-S A91B2B has broadcast 20 distinct callsigns, including LRC650, LRC651, TAI554, TAI555, GUG743.