I would suspect its as Asbo says.. and its trying to phone home.
Some weird results on that IP though.
Its not actually coming from Mexico, LACNIC's Office is in Mexico - LACNIC is the Latin American equivalent of RIPE or ARIN or AFRINIC etc.
ARIN says :- It belongs to LACNIC region - Country UY (Uruguay)
LANIC says :- Unallocated and unassigned in LACNIC block: 191.139.252.191
Theres no RDNS :- server can't find 191.252.139.191.in-addr.arpa.: NXDOMAIN
Performing a trace gives "Destination network unreachable"... so where-ever its trying to reach it just isnt going anywhere... Is the printer a few yrs old and trying to reach a now invalid IP?
I did find
this though which states it is/was supposedly in Kansas, but there is no current info for it being a live IP.