Addresses
2,048
2.0K
Sub-ranges
13+
within this block
PTR Density
91.1%
1.9K of 2.0K IPs have PTR
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
73/100
Moderate
How this score is built
- Baseline (neutral) 65
- Has a reverse-DNS (PTR) record +5
- Established allocation (9y) +3
- Trust score 73 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 64.203.64.0/21
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 64.203.64.0/22 | 1.0K | FlexNetworks | AS19523 | CA |
| 64.203.64.0/22 | 1.0K | FlexNetworks | AS19523 | CA |
| 64.203.64.0/22 | 1.0K | — | — | CA |
| 64.203.70.0/23 | 512 | FlexNetworks | AS54980 | CA |
| 64.203.70.0/23 | 512 | FlexNetworks | AS54980 | CA |
| 64.203.68.0/23 | 512 | — | — | CA |
| 64.203.68.0/23 | 512 | FlexNetworks | AS19523 | CA |
| 64.203.68.0/23 | 512 | FlexNetworks | AS19523 | CA |
| 64.203.70.0/23 | 512 | — | — | CA |
| 64.203.71.0/24 | 256 | — | — | CA |
| 64.203.70.0/24 | 256 | — | — | CA |
| 64.203.71.0/25 | 128 | — | — | CA |
| 64.203.71.128/25 | 128 | — | — | CA |
Geolocation
First 256 of 2,048 IP addresses in 64.203.64.0/21
64.203.64.0
64.203.64.1
64.203.64.2
64.203.64.3
64.203.64.4
64.203.64.5
64.203.64.6
64.203.64.7
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64.203.64.253
64.203.64.254
64.203.64.255
+ 1.8K more (range too large to list inline)
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 64.203.64.0/20.
Announced prefix
Origin AS
Announcement samples
4,885
Last seen
2026-07-23 21:27:53
Frequently Asked Questions
What is 64.203.64.0/21?
64.203.64.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 64.203.64.0 to 64.203.71.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 64.203.64.0/21 network?
The 64.203.64.0/21 range is allocated to an unknown organization from Canada.
Last updated: 2026-07-23 21:55:31 UTC
