  We fabricate three-terminal hybrid devices with a nanowire segment
proximitized by a superconductor, and with two tunnel probe contacts on either
side of that segment. We perform simultaneous tunneling measurements on both
sides. We identify some states as delocalized above-gap states observed on both
ends, and some states as localized near one of the tunnel barriers. Delocalized
states can be traced from zero to finite magnetic fields beyond 0.5 T. In the
parameter regime of delocalized states, we search for correlated subgap
resonances required by the Majorana zero mode hypothesis. While both sides
exhibit ubiquitous low-energy features at high fields, no correlation is
inferred. Simulations using a one-dimensional effective model suggest that
delocalized states may belong to lower one-dimensional subbands, while the
localized states originate from higher subbands. To avoid localization in
higher subbands, disorder may need to be further reduced to realize Majorana
zero modes.
