Skip to main content
CIDR
/20 · 4.1K IPs
ASN
Research Organization of Information and Systems, National Institute of Informatics
Reverse DNS
No PTR record
Blocklisted
Checking…
Scanning blocklists

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

Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →

Network Allocation for 133.78.176.67

CIDR range
133.78.176.0/20
IP range (int)
2,236,526,592 — 2,236,530,687
Prefix length
/20
Organization
Research Organization of Information and Systems, National Institute of Informatics
ASN
AS2907
ASN name
Research Organization of Information and Systems, National Institute of Informatics
Location
Kawasaki, Kanagawa, Japan
Coordinates
35.531500, 139.725900
Accuracy radius
20 km
Postal code
210-0831
Regional Internet Registry
APNIC
Allocated
1997-03-01
Data source(s)
maxmind_city, maxmind_asn, ipinfo_lite, maxmind_country
Last updated
2026-06-30 09:23:58

Origin AS announcing the most-specific prefix that covers this IP, observed across our RIPE RIS collectors.

Announced prefix
Origin AS
Announcement samples
3,577
Last seen
2026-07-20 22:59:13

Frequently Asked Questions

Who owns 133.78.176.67?

133.78.176.67 is allocated to Research Organization of Information and Systems, National Institute of Informatics (AS2907), registered in Kawasaki, Japan.

Where is 133.78.176.67 located?

The geolocation for 133.78.176.67 maps to Kawasaki, Japan based on MaxMind GeoLite2 data. Accuracy depends on the provider and may represent the ISP's regional hub rather than the exact endpoint.

What network is 133.78.176.67 on?

133.78.176.67 belongs to the 133.78.176.0/20 network block announced by AS2907. This range contains 4,096 addresses.

Does 133.78.176.67 have a reverse DNS record?

Reverse DNS (PTR) records are resolved live when you visit this page. If a PTR record exists, it appears in the Reverse DNS field above. PTR records map IP addresses back to hostnames and are commonly used for email authentication and network diagnostics.

Neighbors

Other addresses in the same /24.

Related

Last updated: 2026-07-20 20:23:22 UTC
Share