CIDR Range

37.123.112.0/21

2.0K IPs /21 United Kingdom RIPE

Addresses

2,048

2.0K

IP Range

37.123.112.0

→ 37.123.119.255

Sub-ranges

within this block

PTR Density

36.1%

739 of 2.0K 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.

73/100

Moderate

How this score is built

Baseline (neutral) 65
Has a reverse-DNS (PTR) record +5
Established allocation (14y) +3
Trust score 73 / 100

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

Ranges inside 37.123.112.0/21

CIDR	IPs	Organization	ASN	Country
37.123.116.0/22	1.0K	—	—	GB
37.123.116.0/22	1.0K	—	—	GB
37.123.112.0/23	512	—	—	GB
37.123.112.0/23	512	—	—	GB
37.123.114.0/23	512	Thg Hosting Limited	AS13213	GB
37.123.114.0/23	512	Thg Hosting Limited	AS13213	GB
37.123.114.0/23	512	—	—	GB

First and last addresses in 37.123.112.0/21

37.123.112.0/21 runs from 37.123.112.0 to 37.123.119.255.

First 16

37.123.112.0 37.123.112.1 37.123.112.2 37.123.112.3 37.123.112.4 37.123.112.5 37.123.112.6 37.123.112.7 37.123.112.8 37.123.112.9 37.123.112.10 37.123.112.11 37.123.112.12 37.123.112.13 37.123.112.14 37.123.112.15

Last 16

37.123.119.240 37.123.119.241 37.123.119.242 37.123.119.243 37.123.119.244 37.123.119.245 37.123.119.246 37.123.119.247 37.123.119.248 37.123.119.249 37.123.119.250 37.123.119.251 37.123.119.252 37.123.119.253 37.123.119.254 37.123.119.255

Frequently Asked Questions

What is 37.123.112.0/21?

37.123.112.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 37.123.112.0 to 37.123.119.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 37.123.112.0/21 network?

The 37.123.112.0/21 range is allocated to an unknown organization from United Kingdom.

Last updated: 2026-11-13 19:09:05 UTC