In the following Received: email header, what does the IP address $64\mathrm{.}191\mathrm{.}152\mathrm{.}28$ show us$?$

Received: from

benjamin.hostguardian.com $([64\mathrm{.}191\mathrm{.}152\mathrm{.}28]$:$56279)$

by

controller.askgar.com with esmtps $($TLSv$1$:RC$4-$SHA:$128)$

$($Exim $4\mathrm{.}84)$

$($envelope$-$from

justin$\_$dyer@trinityrenewalsystems.com$)$

id $1$bQgIF$-0001$kU$-$PV

for.gar@askgar.com; Fri, $22$ Jul $201615$:$09$:$30-0500$