Wikipedia:ISP contact information
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List of Internet service providers[edit]
Regional WHOIS sources[edit]
- ARIN IPs only. Note: If an IP belongs to an entity outside of the North American region, ARIN will tell you what RIR to consult.
Abuse reporting[edit]
- abuse.net URLs only. Note: If there is nothing in their database, they offer the default postmaster@URL address.
- spamcop.net URLs and IPs, requires free registration (or use BugMeNot)