Phone number series: who calls from +91 140, +62 812 and other prefixes

The first digits after the country code tell you what kind of line is calling. In India, a +91 140 number is a registered telemarketer and a 1600 number is a bank, insurer, other regulated financial firm or government body. In Indonesia the prefix names the mobile operator, because numbers can't be moved between networks there. In the US and Canada an 800 or 888 number is a toll-free business line. Pick the series that matches the number you got.

Each page below covers one series: who the regulator gave it to, what a call from it usually is, the scams reported with it and how to block or report it. We describe series, never individual people's numbers. To check one specific number, paste it into the phone number validator; if it belongs to a series listed here, the result links to the right page.