CIDR Range

133.157.96.0/19

8.2K IPs /19 Internet Initiative Japan Inc. AS2497 Japan APNIC

Addresses

8,192

8.2K

IP Range

133.157.96.0

→ 133.157.127.255

Sub-ranges

within this block

PTR Density

0.0%

0 of 8.2K 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 (29y) +6
Isp allocation +5
Trust score 76 / 100

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

Geolocation

First and last addresses in 133.157.96.0/19

133.157.96.0/19 runs from 133.157.96.0 to 133.157.127.255.

First 16

133.157.96.0 133.157.96.1 133.157.96.2 133.157.96.3 133.157.96.4 133.157.96.5 133.157.96.6 133.157.96.7 133.157.96.8 133.157.96.9 133.157.96.10 133.157.96.11 133.157.96.12 133.157.96.13 133.157.96.14 133.157.96.15

Last 16

133.157.127.240 133.157.127.241 133.157.127.242 133.157.127.243 133.157.127.244 133.157.127.245 133.157.127.246 133.157.127.247 133.157.127.248 133.157.127.249 133.157.127.250 133.157.127.251 133.157.127.252 133.157.127.253 133.157.127.254 133.157.127.255

Frequently Asked Questions

What is 133.157.96.0/19?

133.157.96.0/19 is a CIDR network block containing 8,192 IPv4 addresses (from 133.157.96.0 to 133.157.127.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 133.157.96.0/19 network?

The 133.157.96.0/19 range is allocated to Internet Initiative Japan Inc. and announced via AS2497 from Japan.

Last updated: 2026-10-27 15:39:06 UTC