AS21547 — OXNET

AS21547 announces 53 IPv4 prefixes covering 64,000 addresses and 2 IPv6 prefixes.

About this network

OXNET is the AS handle for FirstLight Fiber, Inc., a fiber optic provider operating in the northeastern United States.

What it's used for

• The address space carries static IP addresses for business and residential fiber customers, evidenced by reverse DNS entries such as 69-168-4-0.static.firstlight.net and netnames like FLNET-14 and FLNET-30.
• With 64,256 IPv4 addresses announced across 89 prefixes and only 6 observed neighbours, the high address-to-neighbour ratio indicates an access or eyeball network rather than a transit provider.

Notable

• Registrants largely align with the announcer, with most prefixes registered to FirstLight Networks, LLC; however, some blocks retain legacy registrants such as WorldPath Internet Services and Cogent Communications, LLC, reflecting historical acquisitions.
• FirstLight Fiber consolidated Oxford Networks and ION, integrating their network assets and address space into the current FirstLight Fiber entity.
• The inventory includes a mix of /20, /21, and /22 prefixes, with a significant portion under the 64.140.0.0/16 range, suggesting a consolidated corporate estate with site-by-site segmentation.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 63.127.192.0/21
• 64.140.192.0/20
• 64.140.208.0/23
• 64.140.211.0/24
• 64.140.212.0/22
• 64.140.216.0/21
• 64.140.224.0/20
• 64.140.240.0/22
• 64.140.245.0/24
• 64.140.246.0/23
• 64.140.248.0/21
• 66.186.160.0/22
• 66.186.164.0/23
• 66.186.166.0/24
• 66.186.168.0/21
• 66.186.176.0/24
• 66.186.178.0/23
• 66.186.180.0/22
• 66.186.184.0/21
• 66.231.192.0/22
• 66.231.197.0/24
• 66.231.198.0/23
• 66.231.200.0/24
• 66.231.202.0/23
• 66.231.204.0/23
• 66.231.208.0/21
• 66.231.217.0/24
• 66.231.219.0/24
• 66.231.220.0/22
• 69.49.128.0/20
• 69.49.144.0/21
• 69.49.152.0/22
• 69.49.156.0/23
• 69.168.0.0/20
• 72.12.64.0/20
• 72.12.80.0/23
• 72.12.82.0/24
• 72.12.84.0/22
• 72.12.88.0/21
• 72.55.224.0/22
• 72.55.228.0/23
• 72.55.232.0/24
• 72.55.240.0/22
• 72.55.247.0/24
• 72.55.248.0/22
• 72.55.252.0/24
• 72.55.254.0/23
• 74.220.224.0/20
• 140.165.50.0/24
• 198.212.225.0/24
• 198.212.226.0/24
• 198.212.230.0/24
• 208.0.176.0/21
• 2001:4940::/32
• 2604:3f00::/32

Upstream networks

• AS13536 FirstLight Fiber, Inc.

Downstream networks

• AS36823 Martin's Point HealthCare
• AS36787 Hearst-Argyle Television, Inc.
• AS393830 Maine Municipal Association
• AS36501 GARMIN INTERNATIONAL INC.
• AS395342 Exeter Hospital

Adjacent networks

• AS13536 FirstLight Fiber, Inc.
• AS36787 Hearst-Argyle Television, Inc.
• AS393830 Maine Municipal Association
• AS36823 Martin's Point HealthCare
• AS36501 GARMIN INTERNATIONAL INC.
• AS395342 Exeter Hospital