Apparatus

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sensors Mode-S transponder

A1B4B2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N209NV · AIRBUS A-320 · operated by ALLEGIANT AIR LLC

Hex
A1B4B2
Octal
50332262
Decimal
10,597,554
Country
US
Tail
N209NV
Type
A320
Broadcasting now · callsign AAY4702 · 2,975 ft
Flights observed
390
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Current position

A1B4B2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A1B4B2 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
AAY1370 Allegiant Air 10 2026-05-29
AAY3005 Allegiant Air 9 2026-06-07
AAY1367 Allegiant Air 9 2026-06-01
AAY2977 Allegiant Air 7 2026-05-18
AAY1396 - 6 2026-07-20
AAY2998 Allegiant Air 5 2026-05-18
AAY2990 Allegiant Air 5 2026-06-01
AAY2987 Allegiant Air 5 2026-05-15
AAY1401 Allegiant Air 5 2026-07-20
AAY3059 Allegiant Air 4 2026-07-19
AAY3018 Allegiant Air 4 2026-06-03
AAY3016 Allegiant Air 4 2026-05-05
AAY3009 Allegiant Air 4 2026-06-10
AAY3003 Allegiant Air 4 2026-06-01
AAY2980 Allegiant Air 4 2026-04-26
AAY2978 Allegiant Air 4 2026-05-28
AAY1355 Allegiant Air 4 2026-06-07
AAY1351 Allegiant Air 4 2026-05-27
AAY3055 - 3 2026-07-21
AAY3039 - 3 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAY1016 PIE → SDF Jul 26, 21:10 UTCJul 26, 22:30 UTC1h 20m
2026-07-26 AAY976 ALB → PIE Jul 26, 17:05 UTCJul 26, 19:50 UTC2h 45m
2026-07-26 AAY994 SBN → PIE Jul 26, 12:50 UTCJul 26, 15:30 UTC2h 40m
2026-07-26 AAY2646 PSM → PIE Jul 26, 00:25 UTCJul 26, 02:10 UTC1h 45m
2026-07-25 AAY1079 PIE → LEX Jul 25, 21:25 UTCJul 25, 23:15 UTC1h 50m
2026-07-25 AAY1095 PIE → RFD Jul 25, 18:55 UTCJul 25, 20:15 UTC1h 20m
2026-07-25 AAY2694 PIE → ALB Jul 25, 16:20 UTCJul 25, 17:40 UTC1h 20m
2026-07-25 AAY1019 PIE → PIA Jul 25, 00:45 UTCJul 25, 02:55 UTC2h 10m
2026-07-24 AAY1093 RFD → PIE Jul 24, 21:30 UTCJul 24, 23:45 UTC2h 15m
2026-07-24 AAY993 FWA → PIE Jul 24, 16:20 UTCJul 24, 18:15 UTC1h 55m
2026-07-24 AAY996 LAS → GRR Jul 24, 11:25 UTCJul 24, 13:25 UTC2h 0m
2026-07-24 AAY1025 CAK → PIE Jul 24, 00:35 UTCJul 24, 02:45 UTC2h 10m
2026-07-23 AAY2686 CKB → PIE Jul 23, 21:10 UTCJul 23, 23:30 UTC2h 20m
2026-07-23 AAY2706 PBG → PIE Jul 23, 16:35 UTCJul 23, 19:55 UTC3h 20m
2026-07-23 AAY2724 VPS → EWR Jul 23, 12:15 UTCJul 23, 15:05 UTC2h 50m
2026-07-22 AAY1001 USA → PIE Jul 22, 18:45 UTCJul 22, 21:05 UTC2h 20m
2026-07-22 AAY2598 IAG → PIE Jul 22, 14:55 UTCJul 22, 17:40 UTC2h 45m
2026-07-22 AAY1403 TYS → BOS Jul 22, 12:10 UTCJul 22, 13:30 UTC1h 20m
2026-07-21 AAY1415 TYS → PGD Jul 21, 18:15 UTCJul 21, 20:00 UTC1h 45m
2026-07-21 AAY9200 CVG → ABE Jul 21, 15:10 UTCJul 21, 16:55 UTC1h 45m
2026-07-21 AAY3055 - Jul 21, 00:55 UTCJul 21, 01:50 UTC55m
2026-07-20 AAY3062 - Jul 20, 21:55 UTCJul 20, 23:25 UTC1h 30m
2026-07-20 AAY3054 - Jul 20, 19:00 UTCJul 20, 20:40 UTC1h 40m
2026-07-20 AAY3027 - Jul 20, 16:45 UTCJul 20, 17:40 UTC55m
2026-07-20 AAY1401 TYS → EWR Jul 20, 14:00 UTCJul 20, 15:25 UTC1h 25m
2026-07-20 AAY1396 - Jul 20, 11:15 UTCJul 20, 12:40 UTC1h 25m
2026-07-20 AAY3024 TYS → DEN Jul 20, 02:30 UTCJul 20, 03:25 UTC55m
2026-07-19 AAY3060 PIE → TYS Jul 19, 23:45 UTCJul 20, 00:55 UTC1h 10m
2026-07-19 AAY3026 PIE → TYS Jul 19, 21:05 UTCJul 19, 22:30 UTC1h 25m
2026-07-19 AAY1414 PIE → TYS Jul 19, 18:50 UTCJul 19, 19:50 UTC1h 0m
2026-07-19 AAY1407 - Jul 19, 14:50 UTCJul 19, 16:45 UTC1h 55m
2026-07-19 AAY3053 - Jul 19, 11:40 UTCJul 19, 13:30 UTC1h 50m
2026-07-19 AAY3059 TYS → AUS Jul 19, 02:00 UTCJul 19, 03:15 UTC1h 15m
2026-07-18 AAY1425 EWR → TYS Jul 18, 23:40 UTCJul 19, 01:00 UTC1h 20m
2026-07-18 AAY3049 TYS → AUS Jul 18, 21:25 UTCJul 18, 22:25 UTC1h 0m
2026-07-18 AAY1406 BOS → TYS Jul 18, 18:25 UTCJul 18, 20:00 UTC1h 35m
2026-07-18 AAY1399 - Jul 18, 15:30 UTCJul 18, 17:00 UTC1h 30m
2026-07-18 AAY1414 - Jul 18, 12:55 UTCJul 18, 13:55 UTC1h 0m
2026-07-18 AAY1415 - Jul 18, 00:39 UTCJul 18, 02:29 UTC1h 50m
2026-07-17 AAY3030 TYS → EWR Jul 17, 21:50 UTCJul 17, 23:35 UTC1h 45m
2026-07-17 AAY1422 BOS → TYS Jul 17, 19:25 UTCJul 17, 20:44 UTC1h 20m
2026-07-17 AAY1439 - Jul 17, 17:25 UTCJul 17, 18:25 UTC1h 0m
2026-07-17 AAY1424 - Jul 17, 13:50 UTCJul 17, 15:44 UTC1h 55m
2026-07-17 AAY3028 PIE → TYS Jul 17, 10:44 UTCJul 17, 12:40 UTC1h 55m
2026-07-16 AAY1417 TYS → PIE Jul 16, 23:29 UTCJul 17, 02:59 UTC3h 30m
2026-07-16 AAY1416 IND → PIE Jul 16, 18:59 UTCJul 16, 22:19 UTC3h 20m
2026-07-16 AAY1421 DEN → TYS Jul 16, 15:14 UTCJul 16, 17:45 UTC2h 30m
2026-07-16 AAY1413 - Jul 16, 11:15 UTCJul 16, 13:45 UTC2h 30m
2026-07-15 AAY3029 - Jul 15, 20:20 UTCJul 15, 21:55 UTC1h 35m
2026-07-15 AAY1408 - Jul 15, 17:05 UTCJul 15, 18:50 UTC1h 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 N209NV page for operator, model, and routing details .

Mode-S A1B4B2 frequently asked

What is Mode-S code A1B4B2?
A1B4B2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N209NV.
Where is Mode-S A1B4B2 registered?
Mode-S code A1B4B2 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 A1B4B2 broadcasting right now?
Yes. Mode-S A1B4B2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1B4B2, octal 50332262, decimal 10,597,554.
What flights does A1B4B2 operate?
Mode-S A1B4B2 has broadcast 20 distinct callsigns, including AAY1370, AAY3005, AAY1367, AAY2977, AAY1396.