Autonomous system
AS21547 OXNET
Unclassified ARIN
Summary
FirstLight Fiber
fiber business northeastern isp
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.netand netnames likeFLNET-14andFLNET-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
64.140.0.0/16range, 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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 5 downstream and 7 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS13536 | FirstLight Fiber, Inc. | 3,745 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 85 prefixes · 64.00K addresses IPv6 17 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 102 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS21547- Registry name
- FLASN-21547
- Registrant
- FirstLight Networks, LLC
- Abuse contact
- ipabuse@firstlight.net
- Registered
- 2001-05-21
- Last changed
- 2026-04-22
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 43% valid · 26 valid, 34 with no ROA
- ROAs
- 3 authorising AS21547
- ASPA
- no ASPA record
- IRR
- 100% registered · 60 of 60 announcements
- Route objects
- 113 naming AS21547
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 443 networks and 1,784 prefixes, as published 2026-10-19. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere