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Data as of Nov 6, 2026

172.85.56.0/23

No anonymizer space · no proxy exits in 30 days

Crown Castle Fiber LLC · space held by Zayo Bandwidth

Announcement
this exact prefix
No RPKI
Announced by
AS46887
Type
Internet provider
50% of it

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
172.85.32.0/19
since May 2015
AS46887Internet provider4Zayo Bandwidth
More specific

Announcements inside

PrefixOriginTypeHolderRPKI
172.85.56.0/24
since Jul 2015
AS46887UnknownZayo Bandwidth

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
172.85.32.0/198,192ZAYO-CCF-172-85-32-0Zayo Bandwidth (ZAYOB) · USDirect AllocationMay 18, 2015abuse@zayo.com
└ 172.85.56.0/24256LTF-172-85-56-0-24Majesco (C05798295) · USReassignedJul 8, 2015abuse@zayo.com
via ZAYO-CCF-172-85-32-0
└ 172.85.57.16/298LTF-172-85-57-16-29unknown———
└ 172.85.57.24/298LTF-172-85-57-24-29unknown———
└ 172.85.57.104/298NET-172-85-57-104-29unknown———
└ 172.85.57.128/298LTF--172-85-57-128-29unknown———
└ 172.85.57.144/298LTF-0-172-85-57-144-29unknown———
└ 172.85.57.160/298LTF--172-85-57-160-29unknown———
└ 172.85.57.176/2816LTF--172-85-57-176-28unknown———
└ 172.85.57.224/298LTF--172-85-57-224-29unknown———

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

512 addresses
TypeAddressesShareRanges
Internet provider25650%1
Unknown25650%1

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS46887

US
Name
Crown Castle Fiber LLC
Type
Internet provider
Registered
Apr 13, 2009
Domain
zayo.com
Website
www.crowncastle.com/
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed