Skip to main content
CIDR Range

81.94.57.42/31

Addresses
2
2
Sub-ranges
0+
within this block
PTR Density
100.0%
2 of 2 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

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

Geolocation

All 2 IP addresses in 81.94.57.42/31

Not announced as an exact prefix — covered by the announced supernet 81.94.56.0/21.

Announced prefix
Origin AS
Announcement samples
5,549
Last seen
2026-07-24 23:12:08

Frequently Asked Questions

What is 81.94.57.42/31?

81.94.57.42/31 is a CIDR network block containing 2 IPv4 addresses (from 81.94.57.42 to 81.94.57.43). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 81.94.57.42/31 network?

The 81.94.57.42/31 range is allocated to oja.at GmbH and announced via AS39912 from Austria.

How many IP addresses are in 81.94.57.42/31?

81.94.57.42/31 contains exactly 2 usable IPv4 addresses. A /31 prefix length means 2 addresses are covered by this single routing entry.

Last updated: 2026-07-24 23:55:32 UTC
Share