137.66.48.0/23

🇬🇧

IPv4ARINannouncedAS40509FLY - Fly.io, Inc. RPKI Valid

CIDR

137.66.48.0/23

IP Version

IPv4

Addresses

512

Mask

/23 (255.255.254.0)

Country

🇬🇧 United Kingdom

City

London

RIR

ARIN

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Prefix	Origin AS	RPKI	IRR	Last Seen
137.66.48.0/23	AS40509FLY - Fly.io, Inc.	Valid	ARINRADB	6/1/2026

Prefix	Origin	Max Length	Trust Anchor
137.66.0.0/18	AS40509	/24	arin

Origin	Registry	Maintainer	Modified
AS40509	ARIN	MNT-FLYIO	10/3/2025
AS40509	RADB	MAINT-AS40509	10/3/2025

Origin ASN

Geolocation

Country🇬🇧United KingdomGB

RegionWestminster

CityLondon

API

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

curl -s "https://api.ipctl.io/v1/prefix/137.66.48.0/23" | jq

External Links