number of errors=0
number of warnings=0
country=US
Group=chkGrpPostalCode
select distinct admincode1,adminname1 from zip_code where countrycode in ('US') and admincode1 in (select admincode1 from (select distinct admincode1,adminname1 from zip_code where countrycode in ('US')) t group by admincode1 having count(*)>1) order by admincode1
https://tools.usps.com/go/ZipLookupAction!input.action
admincode1 adminname1