Home Prefix Lookup204.128.188.0/24

204.128.188.0/24 - AT&T Enterprises (AS2386)

IPv4ARINallocatedAS2386INS-AS - AT&T Enterprises, LLCNo ROA

CIDR

204.128.188.0/24

IP Version

IPv4

Addresses

256

Mask

/24 (255.255.255.0)

Country

🇺🇸 United States

City

Brookfield

RIR

ARIN

Status

allocated

Allocated

1995-02-06

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
204.128.188.0/24	AS2386 INS-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12

Transfer History

Registry transfers of 204.128.188.0/24, blocks inside it, or blocks containing it.

204.128.188.0/24M&A · 2021-02-23
First Data Corporation
🇺🇸 US ARIN
→
Fiserv Solutions, LLC
🇺🇸 US ARIN

Date	Resource	From	To	Type
2021-02-23	204.128.188.0/24	First Data Corporation 🇺🇸 US ARIN	Fiserv Solutions, LLC 🇺🇸 US ARIN	M&A

Origin ASN

AS2386

INS-AS - AT&T Enterprises, LLC

Related Prefixes

More prefixes of AS2386

All prefixes of AS2386 →

Geolocation

Country🇺🇸United StatesUS

RegionWisconsin

CityBrookfield

Coordinates43.0338, -88.1409 ↗

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/204.128.188.0/24

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

curl -s "https://api.ipctl.io/v1/prefix/204.128.188.0/24" | jq

External Links

RIPEstat