CIDR Range

91.123.72.0/21

2.0K IPs /21 Microlink Network AS399138 Latvia RIPE

Addresses

2,048

2.0K

IP Range

91.123.72.0

→ 91.123.79.255

Sub-ranges

within this block

PTR Density

41.2%

843 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.

76/100

Moderate

How this score is built

Baseline (neutral) 65
Long-established allocation (19y) +6
Has a reverse-DNS (PTR) record +5
Trust score 76 / 100

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

Ranges inside 91.123.72.0/21

CIDR	IPs	Organization	ASN	Country
91.123.72.0/22	1.0K	Microlink Network	AS399138	CZ
91.123.72.0/22	1.0K	Microlink Network	AS399138	LV
91.123.72.0/22	1.0K	Microlink Network	AS399138	CZ
91.123.76.0/22	1.0K	Microlink Network	AS399138	PL
91.123.76.0/22	1.0K	Microlink Network	AS399138	LV
91.123.76.0/22	1.0K	Microlink Network	AS399138	PL

First and last addresses in 91.123.72.0/21

91.123.72.0/21 runs from 91.123.72.0 to 91.123.79.255.

First 16

91.123.72.0 91.123.72.1 91.123.72.2 91.123.72.3 91.123.72.4 91.123.72.5 91.123.72.6 91.123.72.7 91.123.72.8 91.123.72.9 91.123.72.10 91.123.72.11 91.123.72.12 91.123.72.13 91.123.72.14 91.123.72.15

Last 16

91.123.79.240 91.123.79.241 91.123.79.242 91.123.79.243 91.123.79.244 91.123.79.245 91.123.79.246 91.123.79.247 91.123.79.248 91.123.79.249 91.123.79.250 91.123.79.251 91.123.79.252 91.123.79.253 91.123.79.254 91.123.79.255

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 91.123.64.0/20.

Announced prefix

91.123.64.0/20

Origin AS

AS174

Announcement samples

9,414

Last seen

2026-07-13 06:46:16

RIR Ownership History

Atom feed ⇲

Allocation changes captured from regional internet registry (RIR) delegation files, re-imported every six hours.

Date	Event	From	To	RIR
2026-05-10	Country Change	NL	LV	ripe

Frequently Asked Questions

What is 91.123.72.0/21?

91.123.72.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 91.123.72.0 to 91.123.79.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 91.123.72.0/21 network?

The 91.123.72.0/21 range is allocated to Microlink Network and announced via AS399138 from Latvia.

Last updated: 2026-11-02 17:39:06 UTC