51544 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":41.310542,"wof:name":"51544","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102086611,"postalcode_id":554726675,"region_id":85688713}],"mz:is_deprecated":0,"lbl:latitude":41.301861,"geom:area":0.015612,"geom:longitude":-95.108892,"wof:id":554726675,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184868,"wof:belongsto":[102191575,85633793,102086611,85688713],"wof:concordances":{"gp:id":"12780351"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588286","geom:area_square_m":1.45003061744684E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-95.213603,41.244604,-94.965383,41.389516","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-95.105354,"wof:geomhash":"5fbcc9701e804dadbd94c96644edba09","wof:parent_id":102086611,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Lewis"}