sensors Mode-S transponder
7100AF
ICAO 24-bit transponder address · allocated to Saudi Arabia
Currently assigned to HZ-AST · AIRBUS A-321
- Hex
- 7100AF
- Octal
- 34200257
- Decimal
- 7,405,743
- Country
- SA
- Tail
- HZ-AST
- Type
- A321
- Flights observed
- 20
- Distinct callsigns
- 17
- Country
- SA
- Last broadcast
- Jul 22, 19:10 UTC
Last known position
Country allocation
The ICAO 24-bit address 7100AF falls within the block assigned to Saudi Arabia (SA) by ICAO Annex 10, Volume III. Every aircraft registered in Saudi Arabia 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 17 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| SVA333 | Saudi Arabian Airlines | 3 | 2026-05-20 |
| SVA334 | Saudi Arabian Airlines | 2 | 2026-05-20 |
| SVA634 | Saudi Arabian Airlines | 1 | 2026-05-27 |
| SVA541 | Saudi Arabian Airlines | 1 | 2026-06-17 |
| SVA540 | Saudi Arabian Airlines | 1 | 2026-06-17 |
| SVA411 | Saudi Arabian Airlines | 1 | 2026-06-28 |
| SVA410 | Saudi Arabian Airlines | 1 | 2026-06-28 |
| SVA328 | - | 1 | 2026-07-20 |
| SVA1584 | Saudi Arabian Airlines | 1 | 2026-07-22 |
| SVA1564 | - | 1 | 2026-07-22 |
| SVA1460 | - | 1 | 2026-07-21 |
| SVA1336 | - | 1 | 2026-07-19 |
| SVA1297 | - | 1 | 2026-07-08 |
| SVA1169 | Saudi Arabian Airlines | 1 | 2026-05-23 |
| SVA1167 | Saudi Arabian Airlines | 1 | 2026-04-24 |
| SVA1161 | Saudi Arabian Airlines | 1 | 2026-06-07 |
| SVA1127 | - | 1 | 2026-06-28 |
Recent flights last 20
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-22 | SVA1584 | YNB → RUH | Jul 22, 19:00 UTC | Jul 22, 19:10 UTC | 10m |
| 2026-07-22 | SVA1564 | - | Jul 22, 13:30 UTC | Jul 22, 13:40 UTC | 10m |
| 2026-07-21 | SVA1460 | - | Jul 21, 14:05 UTC | Jul 21, 14:15 UTC | 10m |
| 2026-07-20 | SVA328 | - | Jul 20, 14:50 UTC | Jul 20, 15:00 UTC | 10m |
| 2026-07-19 | SVA1336 | - | Jul 19, 22:10 UTC | Jul 19, 22:20 UTC | 10m |
| 2026-07-08 | SVA1297 | - | Jul 8, 18:25 UTC | Jul 8, 18:40 UTC | 15m |
| 2026-06-28 | SVA410 | HBE → JED | Jun 28, 17:34 UTC | Jun 28, 18:00 UTC | 25m |
| 2026-06-28 | SVA411 | JED → HBE | Jun 28, 15:24 UTC | Jun 28, 16:14 UTC | 50m |
| 2026-06-28 | SVA1127 | - | Jun 28, 01:25 UTC | Jun 28, 01:34 UTC | 10m |
| 2026-06-17 | SVA541 | DOH → RUH | Jun 17, 14:35 UTC | Jun 17, 14:45 UTC | 10m |
| 2026-06-17 | SVA540 | RUH → DOH | Jun 17, 12:25 UTC | Jun 17, 12:55 UTC | 30m |
| 2026-06-07 | SVA1161 | DMM → RUH | Jun 7, 22:15 UTC | Jun 7, 22:25 UTC | 10m |
| 2026-05-27 | SVA634 | AMM → RUH | May 27, 12:45 UTC | May 28, 11:20 UTC | 22h 35m |
| 2026-05-23 | SVA1169 | DMM → RUH | May 23, 20:15 UTC | May 23, 20:30 UTC | 15m |
| 2026-05-20 | SVA334 | HBE → RUH | May 20, 20:15 UTC | May 20, 20:35 UTC | 20m |
| 2026-05-20 | SVA333 | RUH → HBE | May 20, 18:00 UTC | May 20, 18:35 UTC | 35m |
| 2026-05-09 | SVA333 | RUH → HBE | May 9, 10:00 UTC | May 9, 18:50 UTC | 8h 50m |
| 2026-04-24 | SVA1167 | DMM → RUH | Apr 24, 02:20 UTC | Apr 24, 02:30 UTC | 10m |
| 2026-04-16 | SVA334 | HBE → RUH | Apr 16, 20:30 UTC | Apr 16, 20:55 UTC | 25m |
| 2026-04-16 | SVA333 | RUH → HBE | Apr 16, 18:30 UTC | Apr 16, 18:50 UTC | 20m |
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 HZ-AST page for operator, model, and routing details .