// public entity intelligence
104.21.16.81
IPNo public feed match19 pDNS relationships
Evidence summary
Researcher feed observations and neutral DNS history are counted separately.
pDNS relationships
19
pDNS first seen
Mar 2026
pDNS last seen
Aug 2026
pDNS observations
22
Public feed matches
No public feed evidence matches this value.
Related hosts and IPs
Public passive DNS relationships connected to this exact indicator.
Network ownership
BGP origin and registry data from Team Cymru.
Origin ASN
AS13335
BGP prefix
104.21.0.0/19
Registry country
US
CLOUDFLARENET - Cloudflare, Inc., US
Registry country is RIR assignment data, not IP geolocation.
Checked 9/5/2026, 9:53:09 AM
Popularity
Daily link and hosting prominence from top1m.org; not a security verdict or traffic estimate.
ipv4 · 104.21.16.81
#54,610
Private research
Take this investigation further
19 public pDNS relationships are available. Private research adds exact timing, focused pivots, and matching paid-feed intelligence. Each private app search costs 1 CTIDAO.