Home Prefix Lookup172.221.64.0/18

172.221.64.0/18 - Charter Communications (AS33588)

IPv4ARINannouncedAS33588BRESNAN-33588 - Charter Communications LLC RPKI Valid

CIDR

172.221.64.0/18

IP Version

IPv4

Addresses

16.3K

Mask

/18 (255.255.192.0)

Country

🇺🇸 United States

City

Grand Junction

RIR

ARIN

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
172.221.64.0/18	AS33588 BRESNAN-33588 - Charter Communications LLC	Valid	Other IRR	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
172.221.64.0/18	AS33588	/18	arin
172.220.0.0/14	AS0	/14	arin

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS33588	Other IRR	MAINT-RR	2026-03-06

Transfer History

Registry transfers of 172.221.64.0/18, blocks inside it, or blocks containing it.

172.220.0.0/14M&A · 2018-11-16
BRIGHT HOUSE NETWORKS, LLC
🇺🇸 US ARIN
→
Charter Communications, Inc
🇺🇸 US ARIN

Date	Resource	From	To	Type
2018-11-16	172.220.0.0/14	BRIGHT HOUSE NETWORKS, LLC 🇺🇸 US ARIN	Charter Communications, Inc 🇺🇸 US ARIN	M&A

Origin ASN

AS33588

BRESNAN-33588 - Charter Communications LLC

Related Prefixes

More prefixes of AS33588

All prefixes of AS33588 →

Geolocation

Country🇺🇸United StatesUS

RegionColorado

CityGrand Junction

Coordinates39.2241, -108.5940 ↗

Learn more

RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
RPKI validatorCheck ROA coverage for any prefix or ASN
What is BGP?How prefixes are announced and routed
More-specific prefixesGlossary: covering and more-specific routes
IPv4 transfers in the ARIN regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/172.221.64.0/18

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/172.221.64.0/18" | jq

External Links

RIPEstat