61729 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":40.630692,"wof:name":"61729","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102082857,"localadmin_id":404499441,"postalcode_id":554734249,"region_id":85688697}],"mz:is_deprecated":0,"lbl:latitude":40.628659,"geom:area":0.005194,"geom:longitude":-89.223567,"wof:id":554734249,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184199,"wof:belongsto":[102191575,85633793,102082857,404499441,85688697],"wof:concordances":{"gp:id":"12784771"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588179","geom:area_square_m":4.8739808393802E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-89.274913,40.585153,-89.184134,40.676194","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-89.221294,"wof:geomhash":"f141bbce2eadbc0483cd013643eac566","wof:parent_id":404499441,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Congerville"}