CIDR Range

199.111.0.0/20

4.1K IPs /20 University of Virginia AS225 United States ARIN

Addresses

4,096

4.1K

IP Range

199.111.0.0

→ 199.111.15.255

Sub-ranges

within this block

PTR Density

0.1%

5 of 4.1K 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.

82/100

Trusted

How this score is built

Baseline (neutral) 65
Academic allocation +6
Long-established allocation (32y) +6
Has a reverse-DNS (PTR) record +5
Trust score 82 / 100

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

Ranges inside 199.111.0.0/20

CIDR	IPs	Organization	ASN	Country
199.111.0.0/21	2.0K	University of Virginia	AS225	US
199.111.12.0/22	1.0K	University of Virginia	AS225	US
199.111.8.0/23	512	Princeton University	AS400065	US
199.111.10.0/23	512	University of Virginia	AS225	US

Geolocation

First and last addresses in 199.111.0.0/20

199.111.0.0/20 runs from 199.111.0.0 to 199.111.15.255.

First 16

199.111.0.0 199.111.0.1 199.111.0.2 199.111.0.3 199.111.0.4 199.111.0.5 199.111.0.6 199.111.0.7 199.111.0.8 199.111.0.9 199.111.0.10 199.111.0.11 199.111.0.12 199.111.0.13 199.111.0.14 199.111.0.15

Last 16

199.111.15.240 199.111.15.241 199.111.15.242 199.111.15.243 199.111.15.244 199.111.15.245 199.111.15.246 199.111.15.247 199.111.15.248 199.111.15.249 199.111.15.250 199.111.15.251 199.111.15.252 199.111.15.253 199.111.15.254 199.111.15.255

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 199.111.0.0/16.

Announced prefix

199.111.0.0/16

Origin AS

AS225

Announcement samples

44,928

Last seen

2026-11-14 00:01:32

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	New Allocation	—	US	arin

Frequently Asked Questions

What is 199.111.0.0/20?

199.111.0.0/20 is a CIDR network block containing 4,096 IPv4 addresses (from 199.111.0.0 to 199.111.15.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 199.111.0.0/20 network?

The 199.111.0.0/20 range is allocated to University of Virginia and announced via AS225 from United States.

Last updated: 2026-11-14 00:24:05 UTC