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.
- Baseline (neutral) 65
- Isp allocation +5
- Established allocation (11y) +3
- Trust score 73 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 47.221.87.128/25
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 47.221.87.192/26 | 64 | Optimum | AS19108 | US |
| 47.221.87.192/26 | 64 | Optimum | AS19108 | US |
| 47.221.87.128/27 | 32 | Optimum | AS19108 | US |
| 47.221.87.128/27 | 32 | Optimum | AS19108 | US |
| 47.221.87.160/28 | 16 | Optimum | AS19108 | US |
| 47.221.87.160/28 | 16 | Optimum | AS19108 | US |
| 47.221.87.184/29 | 8 | Optimum | AS19108 | US |
| 47.221.87.184/29 | 8 | Optimum | AS19108 | US |
| 47.221.87.176/30 | 4 | Optimum | AS19108 | US |
| 47.221.87.176/30 | 4 | Optimum | AS19108 | US |
| 47.221.87.180/31 | 2 | Optimum | AS19108 | US |
| 47.221.87.180/31 | 2 | Optimum | AS19108 | US |
| 47.221.87.183/32 | 1 | Optimum | AS19108 | US |
| 47.221.87.182/32 | 1 | Optimum | AS19108 | US |
| 47.221.87.183/32 | 1 | Optimum | AS19108 | US |
Geolocation
All 128 IP addresses in 47.221.87.128/25
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 47.220.0.0/14.
RIR Ownership History
Atom feed ⇲Allocation changes captured weekly from regional internet registry (RIR) delegation files.
| Date | Event | From | To |
|---|---|---|---|
| 2026-05-10 | New Allocation | — | US |
Frequently Asked Questions
What is 47.221.87.128/25?
47.221.87.128/25 is a CIDR network block containing 128 IPv4 addresses (from 47.221.87.128 to 47.221.87.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 47.221.87.128/25 network?
The 47.221.87.128/25 range is allocated to Optimum and announced via AS19108 from United States.
How many IP addresses are in 47.221.87.128/25?
47.221.87.128/25 contains exactly 128 usable IPv4 addresses. A /25 prefix length means 128 addresses are covered by this single routing entry.
