Autonomous system
AS23329 AS23329 - Crown Castle Fiber LLC
Unclassified ARIN
Summary
Zayo
fiber business infrastructure us
AS23329 is operated by Zayo, formerly known as Crown Castle Fiber LLC.
What it's used for
- The address space carries business and enterprise connectivity, evidenced by reverse DNS entries pointing to
wsboces.org(Western Suffolk BOCES) and netnames associated with that registrant. - The AS announces 1536 IPv4 addresses across 4 prefixes with only 1 observed neighbour, indicating a small-scale access or specific customer-facing network rather than a large transit provider.
Notable
- The RDAP registrants for all announced prefixes are listed as Western Suffolk BOCES, which differs from the current AS holder Zayo, suggesting the space was originally allocated to or leased by the educational organization.
- Zayo completed the acquisition of Crown Castle's Fiber Solutions business, transitioning the AS from a subsidiary of Crown Castle to the Zayo portfolio.
- The inventory consists of four distinct IPv4 prefixes totaling 1536 addresses, all located in the United States, with no IPv6 prefixes currently announced.
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, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS54004 | Cablevision Lightpath LLC | 351 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 1.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS23329- Registry name
- ZAYO-CCF-AS23329
- Registrant
- Zayo Bandwidth
- Abuse contact
- abuse@zayo.com
- Registered
- 2005-06-09
- Last changed
- 2026-06-01
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 6 with no ROA
- ROAs
- 0 authorising AS23329
- ASPA
- no ASPA record
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 7 naming AS23329
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: 453 networks and 1,846 prefixes, as published 2026-11-11. 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