Home Prefix Lookup66.138.250.0/24

66.138.250.0/24 - UNIVERSAL HEALTH SERVICES (AS46511)

IPv4ARINannouncedAS46511MMC-026 - UNIVERSAL HEALTH SERVICESNo ROA

CIDR

66.138.250.0/24

IP Version

IPv4

Addresses

256

Mask

/24 (255.255.255.0)

Country

🇺🇸 United States

City

Plano

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
66.138.250.0/24	AS46511 MMC-026 - UNIVERSAL HEALTH SERVICES	No ROA	Other IRR	2026-10-11

Covering Prefix

1 less-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
66.136.0.0/13	AS7018 ATT-INTERNET4 - AT&T Enterprises, LLC	No ROA	-	2026-10-11

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS46511	Other IRR	MAINT-RR	2026-07-23

Transfer History

Registry transfers of 66.138.250.0/24, blocks inside it, or blocks containing it.

66.136.0.0/13M&A · 2024-12-05
AT&T Corp.
🇺🇸 US ARIN
→
AT&T Enterprises, LLC
🇺🇸 US ARIN
66.136.0.0/13M&A · 2018-07-19
AT&T Internet Services
🇺🇸 US ARIN
→
AT&T Corp.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2024-12-05	66.136.0.0/13	AT&T Corp. 🇺🇸 US ARIN	AT&T Enterprises, LLC 🇺🇸 US ARIN	M&A
2018-07-19	66.136.0.0/13	AT&T Internet Services 🇺🇸 US ARIN	AT&T Corp. 🇺🇸 US ARIN	M&A

Origin ASN

AS46511

MMC-026 - UNIVERSAL HEALTH SERVICES

Related Prefixes

Covering prefix

66.136.0.0/13AS7018

Geolocation

Country🇺🇸United StatesUS

RegionTexas

CityPlano

Coordinates33.0197, -96.7460 ↗

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/66.138.250.0/24

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

curl -s "https://api.ipctl.io/v1/prefix/66.138.250.0/24" | jq

External Links

RIPEstat