Carrier-filtered, de-duplicated and verified on your own machine — before a single paid lookup is spent.
Most tools validate first and filter after — so you pay to check numbers you were always going to bin. List Viper runs it backwards. Four free layers strip the list down, and only the survivors ever reach a billable lookup.
Two million prefixes from the public numbering plan, compiled into a flat 20 MB array. Line type resolves in one indexed read. No network, no per-row fee, no ceiling.
One bit per possible number, allocated lazily. Exact rather than hashed — it can never produce a false match — and flat in memory whether the file is 20 MB or 20 GB.
Every answer you buy is kept for good. Lists overlap month to month, so the second run over the same data is mostly free and the tenth is almost entirely free.
That file had 7,151,542 rows of landline, VoIP and duplicates struck out before a single credit was spent. At the $0.022 a lookup the validation services charge, that is what one run saved. A year of Solo costs less than one per cent of it.
Windows installer, 21 MB. Installs for you alone — no admin rights needed. Full product for seven days, 250,000 rows a run.
Download for Windows →Licences are issued by hand, usually within the hour. Tell us which plan and the name you want it registered to.
jade@elusive-ent.comNo upload. No account. No cloud bucket. No telemetry. No licence check. The only thing that ever goes out is a phone number, when you ask to buy a lookup.
See the method →