Apparatus

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sensors Mode-S transponder

AB35D2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N821NV · operated by ALLEGIANT AIR LLC

Hex
AB35D2
Octal
52632722
Decimal
11,220,434
Country
US
Tail
N821NV
Type
B38M
No current signal · last broadcast Jul 26, 22:10 UTC
Flights observed
447
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S AB35D2.

Country allocation

The ICAO 24-bit address AB35D2 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
AAY981 Allegiant Air 9 2026-07-25
AAY992 - 8 2026-07-16
AAY977 - 8 2026-07-10
AAY989 - 7 2026-07-14
AAY986 Allegiant Air 7 2026-07-21
AAY971 Allegiant Air 7 2026-07-22
AAY2596 - 7 2026-06-26
AAY1078 - 7 2026-06-29
AAY1005 Allegiant Air 7 2026-07-26
AAY2595 - 6 2026-07-10
AAY998 - 5 2026-07-10
AAY988 - 5 2026-07-14
AAY983 - 5 2026-07-06
AAY2598 Allegiant Air 5 2026-05-19
AAY1043 Allegiant Air 5 2026-07-26
AAY1027 - 5 2026-07-02
AAY1010 - 5 2026-07-01
AAY996 - 4 2026-06-26
AAY979 - 4 2026-07-14
AAY976 Allegiant Air 4 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAY1005 FWA → PIE Jul 26, 20:50 UTCJul 26, 22:00 UTC1h 10m
2026-07-26 AAY2641 BLV → PIE Jul 26, 17:45 UTCJul 26, 18:55 UTC1h 10m
2026-07-26 AAY1043 PIE → TOL Jul 26, 14:20 UTCJul 26, 16:35 UTC2h 15m
2026-07-26 AAY1022 SWF → PIE Jul 26, 10:05 UTCJul 26, 12:40 UTC2h 35m
2026-07-26 AAY1032 PIE → SGF Jul 26, 03:30 UTCJul 26, 04:55 UTC1h 25m
2026-07-26 AAY2613 PIE → RFD Jul 26, 00:45 UTCJul 26, 01:35 UTC50m
2026-07-25 AAY1028 BGR → PIE Jul 25, 22:05 UTCJul 25, 22:45 UTC40m
2026-07-25 AAY981 PIE → PBG Jul 25, 19:05 UTCJul 25, 20:35 UTC1h 30m
2026-07-25 AAY2661 TVC → PIE Jul 25, 15:15 UTCJul 25, 17:25 UTC2h 10m
2026-07-25 AAY1021 SBN → PIE Jul 25, 11:45 UTCJul 25, 14:10 UTC2h 25m
2026-07-25 AAY2717 PBG → PIE Jul 25, 00:30 UTCJul 25, 03:00 UTC2h 30m
2026-07-24 AAY2604 PIE → SWF Jul 24, 20:10 UTCJul 24, 23:05 UTC2h 55m
2026-07-24 AAY1058 PIE → BGR Jul 24, 15:50 UTCJul 24, 18:10 UTC2h 20m
2026-07-24 AAY2618 BOS → TYS Jul 24, 11:45 UTCJul 24, 14:25 UTC2h 40m
2026-07-24 AAY2615 IAG → PIE Jul 24, 01:55 UTCJul 24, 03:35 UTC1h 40m
2026-07-23 AAY2675 CHA → PIE Jul 23, 22:40 UTCJul 24, 00:35 UTC1h 55m
2026-07-23 AAY2722 SYR → PIE Jul 23, 20:20 UTCJul 23, 21:35 UTC1h 15m
2026-07-23 AAY2671 - Jul 23, 17:55 UTCJul 23, 19:05 UTC1h 10m
2026-07-23 AAY2687 - Jul 23, 14:35 UTCJul 23, 16:50 UTC2h 15m
2026-07-23 AAY1022 - Jul 23, 10:10 UTCJul 23, 12:40 UTC2h 30m
2026-07-22 AAY2614 CID → PIE Jul 22, 18:10 UTCJul 22, 20:50 UTC2h 40m
2026-07-22 AAY971 PIE → BGR Jul 22, 14:10 UTCJul 22, 17:05 UTC2h 55m
2026-07-22 AAY2599 BOS → SRQ Jul 22, 01:10 UTCJul 22, 03:50 UTC2h 40m
2026-07-21 AAY1052 ORF → PIE Jul 21, 19:25 UTCJul 21, 21:40 UTC2h 15m
2026-07-21 AAY986 PIE → PBG Jul 21, 15:50 UTCJul 21, 18:00 UTC2h 10m
2026-07-21 AAY984 - Jul 21, 11:55 UTCJul 21, 14:05 UTC2h 10m
2026-07-21 AAY2677 PIE → PBG Jul 21, 03:20 UTCJul 21, 05:10 UTC1h 50m
2026-07-21 AAY1076 PIE → ELM Jul 21, 00:00 UTCJul 21, 02:05 UTC2h 5m
2026-07-20 AAY1090 PIE → LEX Jul 20, 20:40 UTCJul 20, 22:25 UTC1h 45m
2026-07-20 AAY1094 PIE → SDF Jul 20, 16:45 UTCJul 20, 18:30 UTC1h 45m
2026-07-20 AAY2707 - Jul 20, 14:00 UTCJul 20, 15:35 UTC1h 35m
2026-07-20 AAY1053 SBN → PIE Jul 20, 11:05 UTCJul 20, 12:50 UTC1h 45m
2026-07-20 AAY1038 PIE → FAR Jul 20, 02:05 UTCJul 20, 03:55 UTC1h 50m
2026-07-19 AAY2653 MCI → PIE Jul 19, 22:55 UTCJul 20, 00:55 UTC2h 0m
2026-07-19 AAY1005 - Jul 19, 20:30 UTCJul 19, 21:45 UTC1h 15m
2026-07-19 AAY2641 BLV → PIE Jul 19, 18:10 UTCJul 19, 19:15 UTC1h 5m
2026-07-19 AAY1043 PIE → TOL Jul 19, 14:40 UTCJul 19, 17:05 UTC2h 25m
2026-07-19 AAY1022 - Jul 19, 10:10 UTCJul 19, 12:40 UTC2h 30m
2026-07-18 AAY1055 PIE → TOL Jul 18, 22:05 UTCJul 18, 23:55 UTC1h 50m
2026-07-18 AAY1077 PIE → SBN Jul 18, 04:05 UTCJul 18, 06:00 UTC1h 55m
2026-07-18 AAY2715 PIE → TRI Jul 18, 00:10 UTCJul 18, 01:54 UTC1h 45m
2026-07-17 AAY1084 PIE → HGR Jul 17, 20:55 UTCJul 17, 22:40 UTC1h 45m
2026-07-17 AAY2707 - Jul 17, 16:34 UTCJul 17, 18:15 UTC1h 40m
2026-07-17 AAY1053 PIE → LEX Jul 17, 12:00 UTCJul 17, 13:29 UTC1h 30m
2026-07-17 AAY2723 MEM → PIE Jul 17, 00:40 UTCJul 17, 03:05 UTC2h 25m
2026-07-16 AAY972 PIE → CID Jul 16, 21:05 UTCJul 16, 23:25 UTC2h 20m
2026-07-16 AAY1073 LEX → PIE Jul 16, 18:19 UTCJul 16, 20:00 UTC1h 40m
2026-07-16 AAY2700 - Jul 16, 16:00 UTCJul 16, 17:00 UTC1h 0m
2026-07-16 AAY992 - Jul 16, 13:45 UTCJul 16, 14:40 UTC55m
2026-07-16 AAY2690 PIE → LEX Jul 16, 10:55 UTCJul 16, 12:34 UTC1h 40m

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 N821NV page for operator, model, and routing details .

Mode-S AB35D2 frequently asked

What is Mode-S code AB35D2?
AB35D2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N821NV.
Where is Mode-S AB35D2 registered?
Mode-S code AB35D2 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 AB35D2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB35D2, octal 52632722, decimal 11,220,434.
What flights does AB35D2 operate?
Mode-S AB35D2 has broadcast 20 distinct callsigns, including AAY981, AAY992, AAY977, AAY989, AAY986.