Home Prefix Lookup31.66.128.0/21

31.66.128.0/21 - Amazon (AS8987)

IPv4ARINannouncedAS8987GOVCLOUD - Amazon RPKI Valid

CIDR

31.66.128.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇺🇸 United States

City

San Jose

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
31.66.128.0/21	AS8987 GOVCLOUD - Amazon	Valid	Other IRR	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
31.66.128.0/18	AS8987	/24	arin
31.66.128.0/17	AS14618	/24	arin
31.66.128.0/17	AS16509	/24	arin

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS8987	Other IRR	MAINT-AS16509	2026-09-22

Transfer History

Registry transfers of 31.66.128.0/21, blocks inside it, or blocks containing it.

31.64.0.0/14inter-RIRTransfer · 2026-05-18
EE Limited
🇬🇧 GB RIPE NCC
→
Salesforce.com, Inc.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2026-05-18	31.64.0.0/14inter-RIR	EE Limited 🇬🇧 GB RIPE NCC	Salesforce.com, Inc. 🇺🇸 US ARIN	Transfer

Origin ASN

AS8987

GOVCLOUD - Amazon

Related Prefixes

More prefixes of AS8987

All prefixes of AS8987 →

Geolocation

Country🇺🇸United StatesUS

RegionCalifornia

CitySan Jose

Coordinates37.3387, -121.8850 ↗

Abuse Contact

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/31.66.128.0/21

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

curl -s "https://api.ipctl.io/v1/prefix/31.66.128.0/21" | jq

External Links

RIPEstat