Resources for researching IP Addresses, and other things
In my job, we have lots of organizations that abuse the free services we provide. I try to identify them and ask them politely to stop, before just blocking them. In doing this, I've found several free resources that have been helpful in identifying network owners and contacts.
UIC - time, MAC, IP, speed test, whois, your info, character code tables/conversion, encode/decode, color codes. Thanks to my friend Darren for letting me know about this one!
Internet Storm Center - They provide reports on IP addresses, including Country Code, ASN, AS Name, Whois info and abuse PoC. With DShield, you can see reports on if the IP has been reported, how frequently, first report, last report, etc. I start here.
BPGView - I found this useful for find a PoC for a network that ISC didn't have.
IPduh - very basic interface, but quite a bit of information and possible actions.
UPDATE:
I'm going to add the MAC Address research items here, not enough ATM to have a separate page.
Wireshark OUI Lookup Tool - The Wireshark OUI lookup tool provides an easy way to look up OUIs and other MAC address prefixes.
Didn't list your favorite? Email me at