61816 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":39.922814,"wof:name":"61816","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102081657,"localadmin_id":404496209,"postalcode_id":554734355,"region_id":85688697}],"mz:is_deprecated":0,"lbl:latitude":39.922809,"geom:area":0.007842,"geom:longitude":-88.001219,"wof:id":554734355,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184179,"wof:belongsto":[102191575,85633793,102081657,404496209,85688697],"wof:concordances":{"gp:id":"12784825"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588087","geom:area_square_m":7.4365265510261E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-88.056947,39.879432,-87.938125,39.967056","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-88.001216,"wof:geomhash":"38107c2c2aa210af1987d01d51189bd3","wof:parent_id":404496209,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Broadlands"}