the internet code for Guam is - ".gu".
Information about .gu domains
There are estimated to be about 75 domains with .gu suffix (2014).
The Intended use for .gu domains is for entities connected with Guam.
Actual use: Not very heavily used.
The .gu internet code was Introduced in 1994.
The Sponsoring Organisation for .gu domains is "University of Guam Computer Center".
Structure of .gu ccTLD: Registrations are accepted only at the third level beneath various second-level labels.
Registration restrictions of .gu domain: Must have a contact in Guam.
University of Guam Computer Center's contact details - See link
For .gu domain registration click on the following link - See link
You can see more details about the .gu ccTLD in Wikipedia - See link
Internet ipaddress and mailsevers
IP Addresses: 229,392.
Number of Internet Users (2014)
Guam makes up 0.00% of the world's Internet users and it ranked on 161 place compared to other countries in the world.
According to data from internetlivestats.com there are 112,196 internet users in Guam, which makes up about 66.96% of Guam's population (167,546).
SOURCES OF INFORMATION
Domain Count Statistics for TLDs - See link