TAC lookup
IMEI prefix 35024160
Samsung 2021ModelGalaxy S21 Ultra 5G
BrandSamsung
ReleasedReleased 2021, January 29
OSAndroid 11, up to 4 major upgrades, One UI 7
Display6.8" · 1440x3200 pixels
ChipsetExynos 2100
The eight digits 35024160 identify a Samsung Galaxy S21 Ultra 5G. A phone whose IMEI starts with them is that model, whatever the seller wrote in the listing — the TAC is the manufacturer’s own allocation, not a lookup table someone typed by hand.
Have the full IMEI? The free
TAC / IMEI lookup resolves it and returns the specification sheet. For the lock state, use the $0.03
SIM lock check — a model lookup cannot tell you whether the handset is carrier locked.
What a TAC cannot tell you
Three things decide whether a device is worth buying, and none of them is in the TAC: whether it is carrier locked, whether it is blacklisted, and whether iCloud or MDM is on. Those are separate records against the full IMEI, and each costs a few cents to read.
- Carrier lock — the operator that owns the activation policy, from $0.03.
- Blacklist — GSMA and carrier registers, from $0.03.
- iCloud / MDM — the locks no unlock service can remove.
Same model, other prefixes
TAC from the GSMA allocation register, last updated 2026-10-28.
