Found 5 reference links starting with US:

US Zip Instant ZIP code lookup service featuring Geographic and Demographic Statistics and Maps, Public School Records and Weather Information. Category: Postal Information Rate this link:4.8 / 4 votes
User Agents Understand what information is contained in a user agent string and get an analysis of your or any other user agent string. Category: Technology Rate this link:4.0 / 1 vote
UsingEnglish.com English Language Reference Resources Category: English Language Rate this link:0.0 / 0 votes
USPS State Abbreviations Official USPS State Abbreviations, also includes street suffixes Category: Acronyms And Abbreviations Rate this link:5.0 / 1 vote
USPublicRecords.com Public Records Index from United States US that provide online access to search people, criminal background checks, find business information. Category: Law Resources Rate this link:5.0 / 1 vote