Email blocklist · DNSBL · IP addresses MON · 14 SEP 2026

Invaluement

Operated by Invaluement · United States · Zone sip.invaluement.com

About

Commercial list aimed at filling gaps left by free lists. Not free for any use; subscription required.

Listing criteria

Commercial IP reputation database focused on hard-to-detect spam (compromised hosts, hijacked IPs) that the larger free lists do not always catch.

How to query

For an IP address 1.2.3.4, query reversed-octets-dot-zone:

dig +short 4.3.2.1.sip.invaluement.com

A returned IP (such as 127.0.0.2) means listed. Each blocklist has its own set of return codes meaning different things; the operator's documentation explains theirs.

Operator site