The news comes two weeks after the main client of Binance DEX also announced it would start geo-blocking U.S. customers and 28 other countries in July. Bittrex announced last week they would be geo-fencing 32 cryptocurrencies from the U.S. clients, following the same move by Poloniex a couple of weeks ago. Binance follows Bitfinex and BitMEX, which both started blocking U.S. customers in late 2017 as a result of the challenging regulatory climate. Huobi then started licensing its technology and brand to a U.S.-based company HBUS (later rebranded to Huobi), similar to Binance’s current plans for the US, having partnered with BAM Trading Services Inc – an unknown money services business listed in San Francisco. 

https://www.theblockcrypto.com/2019/06/14/us-customers-to-be-blocked-from-trading-on-binance-com/