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 1 202,090
184,140-204,135 | individual IP addresses
Level 2 1,277
981-1,277 | netblocks with too many listed addresses
Level 3 69
63-69 | whole autonomous systems
Recently listed ASNs
ASNOperatorListed
AS135377 HK UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED 2026-11-13
AS266702 AR MEGALINK S.R.L. 2026-11-13
AS401401 US Unredacted Inc 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