Cisco OpenDNS, LLC

Data as of 2026-08-16
BGP inherited
Cluster stats
Netblocks1,737 · 475,904 IPv4 addresses
IPv6 225 prefixes (largest 2a04:e4c0::/29)
Registered in United States (1,516) · Mexico (1)
Cluster ID222372986
RegistryBGP
Customersfind customers using this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 23 shared RIR contact/maintainer handles
Registry names 5 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

8 weekly snapshots · JSON
1,742 +18 netblocks since 2026-07-05
2026-07-05 peak 1,742 2026-08-16

IP Ranges (1,737)

showing 50 of 1,737 — see all — ⬇ export CSV (free export limited to 500 rows — subscribe for the full export)
CIDR Org name Registry Status Confidence
12.153.230.0/24 Cisco IoT BGP ANNOUNCED ● high
12.153.231.0/24 Cisco IoT BGP ANNOUNCED ● high
12.190.236.0/24 Cisco IoT BGP ANNOUNCED ● high
46.255.41.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
65.23.152.0/24 Cisco IoT BGP ANNOUNCED ● high
65.23.152.0 – 65.23.157.255 Cisco IoT ARIN DIRECT ALLOCATION ● high
65.23.153.0/24 Cisco IoT BGP ANNOUNCED ● high
65.23.154.0/24 Cisco IoT BGP ANNOUNCED ● high
65.23.155.0/24 Cisco IoT BGP ANNOUNCED ● high
65.23.156.0/24 Cisco IoT BGP ANNOUNCED ● high
65.23.157.0/24 Cisco IoT BGP ANNOUNCED ● high
66.59.88.0/22 Cisco IoT ARIN DIRECT ALLOCATION ● high
66.59.88.0/23 Cisco IoT BGP ANNOUNCED ● high
66.59.90.0/23 Cisco IoT BGP ANNOUNCED ● high
67.209.232.0/24 Cisco IoT BGP ANNOUNCED ● high
67.209.232.0 – 67.209.238.255 Cisco IoT ARIN DIRECT ALLOCATION ● high
67.209.233.0/24 Cisco IoT BGP ANNOUNCED ● high
67.209.234.0/24 Cisco IoT BGP ANNOUNCED ● high
67.209.235.0/24 Cisco IoT BGP ANNOUNCED ● high
67.209.236.0/24 Cisco IoT BGP ANNOUNCED ● high
67.209.237.0/24 Cisco IoT BGP ANNOUNCED ● high
67.209.238.0/24 Cisco IoT BGP ANNOUNCED ● high
67.215.64.0/19 Cisco OpenDNS, LLC ARIN DIRECT ALLOCATION ● high
67.215.64.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.65.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.66.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.69.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.70.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.71.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.73.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.76.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.78.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.79.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.80.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.81.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.82.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.83.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.84.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.85.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.86.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.87.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.88.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.90.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.94.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.215.95.0/24 Cisco OpenDNS, LLC BGP ANNOUNCED ● high
67.223.120.0/21 Cisco IoT ARIN DIRECT ALLOCATION ● high
67.223.120.0/23 Cisco IoT BGP ANNOUNCED ● high
67.223.122.0/23 Cisco IoT BGP ANNOUNCED ● high
67.223.124.0/23 Cisco IoT BGP ANNOUNCED ● high
67.223.126.0/23 Cisco IoT BGP ANNOUNCED ● high

IPv6 ranges (225)

showing the 15 largest allocations
CIDR
2a04:e4c0::/29
2605:9780::/32
2a00:9600::/32
2600:382:4000::/40
2605:9780:1000::/40
2605:9780:1100::/40
2605:9780:1200::/40
2605:9780:1300::/40
2605:9780:1400::/40
2605:9780:1500::/40
2605:9780:1600::/40
2605:9780:1700::/40
2605:9780:1800::/40
2605:9780:1900::/40
2605:9780:1a00::/40

Domains hosted in this network

what's this?
opendns.com umbrella.com cisco.com opendnstest.com internetbadguys.com dnsomatic.com strln.net examplemalwaredomain.com examplebotnetdomain.com akadns.net

Network trust

what's this?
RPKI hygiene: B how networks compare →
89.3% of checked blocks have valid RPKI ROA coverage (1,555 of 1,742)
Possible discrepancies (4)

These blocks are registered to Cisco OpenDNS, LLC but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

67.215.71.0/24 /24 authorized for AS14618 — Amazon.com, Inc.
151.186.165.0/24 /24 authorized for AS14618 — Amazon.com, Inc.
151.186.200.0/24 /24 authorized for AS14618 — Amazon.com, Inc.
151.186.201.0/24 /24 authorized for AS14618 — Amazon.com, Inc.

NIC Handles

ADMIN7957-ARIN ADMIN7957-ARIN ADMIN7957-ARIN AS25605 AS36180 AS36692 CCSNA-ARIN CCSNA1-ARIN CCSNT-ARIN CS-2821 DUMY-RIPE DUMY-RIPE +11 more