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Data as of Nov 8, 2026

144.121.28.0/22

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
75% of it

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
144.121.0.0/18
since Aug 2016
AS46887Internet provider16
3 always on
Zayo Bandwidth
144.121.0.0/16
since Nov 2021
AS46887Internet provider131
25 always on
Zayo Bandwidth
More specific

Announcements inside

PrefixOriginTypeHolderRPKI
144.121.30.0/24
since Mar 2018
AS62653BusinessZayo 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
144.121.0.0/1665,536ZAYO-CCF-144-121-0-0Zayo Bandwidth (ZAYOB) · USDirect AllocationApr 29, 2016abuse@zayo.com
└ 144.121.28.0/298NET-LT-187-144-121-28-0-29unknown———
└ 144.121.28.32/2732NET-LT-086-144-121-28-32-27unknown———
└ 144.121.28.64/2816NET-LT-381-144-121-28-64-28unknown———
└ 144.121.28.80/298NET-144-121-28-80-29unknown———
└ 144.121.28.88/298NET-CCF--144-121-28-88-29unknown———
└ 144.121.28.96/2732NET-CCF--144-121-28-96-27unknown———
└ 144.121.28.136/298NET-144-121-28-136-29unknown———
└ 144.121.28.160/298LTF--144-121-28-160-29unknown———
└ 144.121.28.168/304NET-CCF--144-121-28-168-30unknown———
└ 144.121.28.176/2816NET-144-121-28-176-28unknown———
└ 144.121.28.192/298NET-CCF-0-144-121-28-192-29unknown———
└ 144.121.28.204/304NET-CCF---144-121-28-204-30unknown———
└ 144.121.28.216/298NET-CCF-0-144-121-28-216-29unknown———
└ 144.121.28.224/298NET-144-121-28-224-29unknown———
└ 144.121.28.232/298NET-CCF-0-144-121-28-232-29unknown———
└ 144.121.28.240/298NET-CCF-0-144-121-28-240-29unknown———
└ 144.121.29.0/25128NET-CCF-144-121-29-0-25unknown———
└ 144.121.29.136/298NET-CCF-0-144-121-29-136-29unknown———
└ 144.121.29.144/304NET-CCF-0-144-121-29-144-30unknown———
└ 144.121.29.160/298NET-CCF-0-144-121-29-160-29unknown———
└ 144.121.29.168/298LTF-0-144-121-29-168-29unknown———
└ 144.121.29.188/304NET-CCF---144-121-29-188-30unknown———
└ 144.121.29.192/298NET-CCF-0-144-121-29-192-29unknown———
└ 144.121.29.208/2816NET-144-121-29-208-28unknown———
└ 144.121.29.224/298NET-144-121-29-224-29unknown———
└ 144.121.29.232/298LTF-0-144-121-29-232-29unknown———
└ 144.121.29.240/298NET-144-121-29-240-29unknown———
└ 144.121.29.248/298NET-144-121-29-248-29unknown———
└ 144.121.30.0/24256NET-144-121-30-0-24HAI Group (C06808969) · USReassignedNov 17, 2017abuse@zayo.com
via ZAYO-CCF-144-121-0-0
└ 144.121.31.0/2816NET-CCF--144-121-31-0-28unknown———
└ 144.121.31.16/304NET-CCF--144-121-31-16-30unknown———
└ 144.121.31.20/304NET-CCF---144-121-31-20-30unknown———
└ 144.121.31.24/298NET-144-121-31-24-29unknown———
└ 144.121.31.64/2664NET-144-121-31-64-26unknown———
└ 144.121.31.136/298NET-SD-50170-144-121-31-136-29unknown———
└ 144.121.31.152/298NET-144-121-31-152-29unknown———
└ 144.121.31.160/298NET-CCF-0-144-121-31-160-29unknown———
└ 144.121.31.168/298NET-CCF-0-144-121-31-168-29unknown———
└ 144.121.31.176/2816NET-Z-CCF-0-144-121-31-176-28unknown———
└ 144.121.31.192/2732NET-CCF---144-121-31-192-27unknown———
└ 144.121.31.224/304NET-CCF--0-144-121-31-224-30unknown———
└ 144.121.31.240/2816NET-CCF--144-121-31-240-28unknown———

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

1,024 addresses
TypeAddressesShareRanges
Internet provider76875%2
Business25625%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