The United States Zip codes
http://theunitedstateszipcodes.com
Topeka ZIP CODES
66601
66603
66604
66605
66606
66607
66608
66609
66610
66611
66612
66614
66615
66616
66617
66618
66619
66620
66621
66622
66624
66625
66626
66628
66629
66636
66637
66642
66647
66652
66653
66667
66675
66683
66692
66699