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Spamhaus DROP and ASN-DROP

Threat blocklists. What Spamhaus DROP and ASN-DROP is, on what terms it is used, which fields of the IP answer it feeds, how big it is today and when it was last synced.

KindThreat blocklists
Publisherhttps://www.spamhaus.org/blocklists/do-not-route-or-peer/
TermsFree of charge under the Spamhaus DROP terms of use, which grant no licence of the intellectual property in the lists and let Spamhaus revoke the right to use them at its discretion; when used in a product, credit goes to The Spamhaus Project and the date and copyright line stay with the file.
Terms of useSpamhaus DROP terms of use
Refreshdaily
Size today1,712 IPv4 ranges and 91 IPv6 ranges and 442 autonomous systems compiled from the 3 feeds.
Last synced2026-10-17
Answersis_blocklisted, blocklist

What it is

Spamhaus DROP lists netblocks hijacked or leased by spam and cybercrime operations, IPv4 and IPv6, and ASN-DROP the operators behind them, matched by the address's autonomous system. A hit is the 80-point blocklist signal and names the list.

What it answers

In the IP response this source feeds is_blocklisted, blocklist. Every answer names the datasets it read in its sources block with the date each was synced, so the figure on this page and the one in an answer are the same figure. 

curl https://spaw.co/api/v1/ip \
  -H "Authorization: Bearer $SPAW_KEY" \
  -H "Content-Type: application/json" \
  -d '{"ip": "203.0.113.9"}'

How to read this page

A source names a network or an operator, never a person. An address inside one of these ranges tells you what the connection is — a cloud instance, a VPN exit, a gateway, a listed host — and nothing about who is behind it.

More sources in threat blocklists

counts and dates read from the installed feed · checked 2026-10-17

Wrong result, or is it about you? If this tool said something you think is wrong, tell us and a person reads it. If Spaw is holding data about you and you never signed up here — a customer may have had your address verified, or reported that a message to it bounced — erase it yourself, confirmed by mail to that address and with no account needed.

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