How to find out the subnet of the provider?

Question

Computer networks

Available:
Dynamic IP: 188.242.135.114
Subnet mask: 255.255.255.0

Origin of my SkyNet provider: AS48076

Answer 1

You can find out about IPv4 prefixes announced to the outside here (bgp.he.net) or here (stat.ripe.net) . Finding out how these prefixes are structured is a little trickier and it's not yet clear if it's necessary.

Answer 2

according to RIPE:
% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See www.ripe.net/db/support/db-terms-conditions.pdf
% Note: this output has been filtered.
% To receive output for a database update, use the "-B" flag.
% Information related to ' 188.242.0.0 -
188.242.255.255 ' country: RU admin-c: SKNT2-RIPE tech-c:
status: ASSIGNED PA
mnt-by: MNT-SKNT
mnt-lower: MNT-SKNT
mnt-routes: MNT-SKNT
source: RIPE # Filtered
% Information related to '188.242.128.0/18AS35807'
route: 188.242.128.0/18
descr: SkyNet Networks
origin: AS35807
mnt-by: MNT-SKNT
source: RIPE # Filtered