23130 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":37.395337,"wof:name":"23130","counts:names_total":0,"wof:placetype":"postalcode","wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102087289,"postalcode_id":554708135,"region_id":85688747}],"mz:is_deprecated":0,"lbl:latitude":37.387285,"geom:area":0.002186,"geom:longitude":-76.267997,"wof:id":554708135,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1480789097,"wof:belongsto":[102191575,85633793,85688747,102087289],"wof:concordances":{"gp:id":"12767223"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12590384","geom:area_square_m":2.14721934516E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-76.31263,37.368455,-76.240394,37.421078","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-76.259439,"wof:geomhash":"7a5f19699ffe2a384dca2dcbd25ac38c","wof:parent_id":102087289,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}