Indonesia Phone Prefix → Carrier Lookup (Cek Operator Nomor HP)

Indonesian mobile numbers are allocated in fixed 4-digit prefix blocks (0811–0899) by the regulator, so the prefix tells you which operator issued the number — Telkomsel, Indosat, XL, AXIS, Tri, Smartfren, and a few niche players. This tool normalizes a number written in any common format (0812…, +62812…, 62812…, with spaces or dashes) and maps its prefix to the operator, the consumer brand (simPATI, IM3, XL, Tri, Smartfren, …), and the post-merger parent group.

It is merger-aware. After the 2025 XLSmart merger, XL, AXIS, and Smartfren are one group (though the retail brands still run separately); after the 2022 Indosat Ooredoo Hutchison merger, IM3 and Tri are one group. The tool shows both the brand and the current group so classification stays correct. Because Indonesia has not implemented mobile number portability, a number's prefix reliably identifies its operator — there is no porting across operators to muddy it.

Everything runs locally in your browser from a bundled table — nothing is uploaded and there is no network lookup. Two honest limits: it reports the operator the block was allocated to (numbers can still be recycled or moved between brands within the same group), and it does not attempt any region/HLR decode — Indonesian mobile numbers do not positionally encode a region (that applies only to landline area codes), so no such digit is decoded here.