Addresses
32,768
32.8K
Sub-ranges
7+
within this block
PTR Density
0.3%
88 of 32.8K 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.
76/100
Moderate
How this score is built
- Baseline (neutral) 65
- Long-established allocation (36y) +6
- Has a reverse-DNS (PTR) record +5
- Trust score 76 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 139.57.0.0/17
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 139.57.64.0/18 | 16.4K | Brock University | AS16475 | CA |
| 139.57.0.0/19 | 8.2K | Brock University | AS16475 | CA |
| 139.57.32.0/19 | 8.2K | Brock University | AS16475 | CA |
| 139.57.0.0/20 | 4.1K | Brock University | AS16475 | CA |
| 139.57.16.0/20 | 4.1K | Brock University | AS16475 | CA |
| 139.57.32.0/20 | 4.1K | Brock University | AS16475 | CA |
| 139.57.48.0/20 | 4.1K | Brock University | AS16475 | CA |
Geolocation
First 256 of 32,768 IP addresses in 139.57.0.0/17
139.57.0.0
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+ 32.5K more (range too large to list inline)
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 139.57.0.0/16.
Announced prefix
Origin AS
Announcement samples
7,646
Last seen
2026-07-24 01:16:55
Frequently Asked Questions
What is 139.57.0.0/17?
139.57.0.0/17 is a CIDR network block containing 32,768 IPv4 addresses (from 139.57.0.0 to 139.57.127.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 139.57.0.0/17 network?
The 139.57.0.0/17 range is allocated to Brock University and announced via AS16475 from Canada.
Last updated: 2026-07-24 01:40:32 UTC
