We have got
2
reports against 8312392931
The majority indicated that it is a Other

Who called from 8312392931

1
bob
Don't know the carrier. Does anyone?
Latest comments
2
sashimi
Here are some resources.  

http://www.telcodata.us/telcodata/telco?npa=831&exchange=239 - Cingular Wireless (AT&T)

http://puck.nether.net/npa-nxx/new-lookup.cgi?number=8312392931 - Pacific Bell

http://www.npanxxsource.com/npanxx.htm - came back as AT&T
Latest comments
(831) 239-2931  +1 831-239-2931  8312392931  +18312392931