fmb.la is a free composite blocklist for email classification, weighted from multiple sources so only the worst actors are listed.

Lookup

An IP address of either family, an AS number, or a domain name.

Currently listed
Level 1 200,970
184,140-200,970 | individual IP addresses
Level 2 1,169
952-1,170 | netblocks with too many listed addresses
Level 3 69
62-69 | whole autonomous systems
Recently listed ASNs
ASNOperatorListed
AS147049 AU PacketHub S.A. 2026-11-12
AS43060 UZ IPLUS LLC 2026-11-12
AS56400 UA SPD Chernega Aleksandr Anatolevich 2026-11-12
AS151330 PK PLAY BROADBAND (PRIVATE) LIMITED 2026-11-12
AS393406 US DigitalOcean 2026-11-11
AS35048 RU Biterika Group LLC 2026-11-10
AS140923 BD Global Link 2026-11-09
AS219326 GB SULAVI LTD 2026-11-08
AS151391 BD Varendra IT 2026-11-08
AS209605 LT UAB Host Baltic 2026-11-08