Incoming Number Info

您可以随时随地在自己的各种设备上畅享数百万最新的 Android 应用、游戏、音乐、电影、电视节目、图书、杂志等精彩内容。

Provides city and state information for incoming U.S. calls and the country name for international calls.

It's:

Simple, has no ads, minimum permissions, no Internet access is required and it's totally free!

U.S. number data is from NANPA and international information is from the ITU. (Icon from Androidicons.com)