Home Prefix Lookup66.17.64.0/21

66.17.64.0/21 - GTT BACKBONE GTT Communications (AS3257)

IPv4ARINannouncedAS3257GTT-BACKBONE GTT Communications Inc. RPKI Valid

CIDR

66.17.64.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇺🇸 United States

City

Ashburn

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
66.17.64.0/21	AS3257 GTT-BACKBONE GTT Communications Inc.	Valid	ARIN	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
66.17.64.0/21	AS2914	/24	arin
66.17.64.0/21	AS3257	/24	arin

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS3257	ARIN	MNT-GAL-104	2025-11-13
AS2914	ARIN	MNT-GAL-104	2025-11-07

Transfer History

Registry transfers of 66.17.64.0/21, blocks inside it, or blocks containing it.

66.17.64.0/20M&A · 2025-05-07
GTT
🇺🇸 US ARIN
→
GTT Americas, LLC
🇺🇸 US ARIN
66.17.64.0/20M&A · 2023-11-21
MegaPath Corporation
🇺🇸 US ARIN
→
GTT
🇺🇸 US ARIN

Date	Resource	From	To	Type
2025-05-07	66.17.64.0/20	GTT 🇺🇸 US ARIN	GTT Americas, LLC 🇺🇸 US ARIN	M&A
2023-11-21	66.17.64.0/20	MegaPath Corporation 🇺🇸 US ARIN	GTT 🇺🇸 US ARIN	M&A

Origin ASN

AS3257

GTT-BACKBONE GTT Communications Inc.

Related Prefixes

More prefixes of AS3257

All prefixes of AS3257 →

Geolocation

Country🇺🇸United StatesUS

CityAshburn

Coordinates39.0438, -77.4874 ↗

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/66.17.64.0/21

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

curl -s "https://api.ipctl.io/v1/prefix/66.17.64.0/21" | jq

External Links

RIPEstat