Layer Estimates:

Layer: Census Tract Demographics by Age (ID:0)
Count: 1511
Extent:

XMin: -9814081.96251654
YMin: 4544927.55227785
XMax: -9427455.95037031
YMax: 5128250.64201441
Spatial Reference: 102100 (3857)

Layer: Census Bureau ZCTA Zipcode Tabulation Area Demographics by Age (ID:1)
Count: 776
Extent:

XMin: -9814081.84457982
YMin: 4544927.55245161
XMax: -9427455.95066432
YMax: 5128250.49599312
Spatial Reference: 102100 (3857)