prefixblocker.com
prefixblocker.com is a live English-language website hosted on Cloudflare, Inc. (AS13335) in the United States, served by Cloudflare. cl0q first saw it on 2026-09-02 and last crawled it on 2026-09-02. It resolves to 104.21.57.40 and has mail (MX) records set up. Its favicon is fingerprinted by SHA-256, so you can find every other site that serves the same icon.
How the site describes itself:
PrefixBlocker - Block Spam Calls by Prefix, Privately
PrefixBlocker is a privacy-first Android app that blocks unwanted calls by prefix, country and contacts. No account, no cloud, everything stays on your phone.
| Status | 200 OK — live & indexed by cl0q |
|---|---|
| First seen | 2026-09-02 |
| Last crawled | 2026-09-02 |
| IPv4 | 104.21.57.40 |
| IPv6 | 2606:4700:3030::ac43:bd1d |
| Network | AS13335 Cloudflare, Inc. · United States |
| Mail (MX) | in1-smtp.messagingengine.com,in2-smtp.messagingengine.com |
| Language | en |
| Server | cloudflare |