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Data as of Nov 8, 2026

144.121.196.0/22

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
Risk
0 / 100 · Low

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
144.121.192.0/18
since Dec 2017
AS46887Internet provider43
8 always on
Zayo Bandwidth
144.121.0.0/16
since Nov 2021
AS46887Internet provider132
25 always on
Zayo 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
└ 144.121.196.4/304NET-Z-CCF--144-121-196-4-30unknown———
└ 144.121.196.8/298NET-144-121-196-8-29unknown———
└ 144.121.196.16/298NET-0-144-121-196-16-29unknown———
└ 144.121.196.24/304NET-CCF---144-121-196-24-30unknown———
└ 144.121.196.32/298NET-Z-CCF--144-121-196-32-29unknown———
└ 144.121.196.48/2816NET-CCF---144-121-196-48-28unknown———
└ 144.121.196.64/298NET-144-121-196-64-29unknown———
└ 144.121.196.72/298NET-144-121-196-72-29unknown———
└ 144.121.196.80/298NET-CCF---144-121-196-80-29unknown———
└ 144.121.196.88/298NET-144-121-196-88-29unknown———
└ 144.121.196.104/298NET-144-121-196-104-29unknown———
└ 144.121.196.120/298NET-144-121-196-120-29unknown———
└ 144.121.196.128/298LTF--144-121-196-128-29unknown———
└ 144.121.196.144/2816NET-144-121-196-144-28unknown———
└ 144.121.196.160/2816LTF-LT-210-144-121-196-160-28unknown———
└ 144.121.196.176/298NET-CCF-0-144-121-196-176-29unknown———
└ 144.121.196.184/298NET-CCF---144-121-196-184-29unknown———
└ 144.121.196.192/304NET-CCF-0-144-121-196-192-30unknown———
└ 144.121.196.200/298NET-CCF--LT-794-144-121-196-200-29unknown———
└ 144.121.196.208/298NET-144-121-196-208-29unknown———
└ 144.121.196.216/298NET-CCF---144-121-196-216-29unknown———
└ 144.121.196.224/298NET-144-121-196-224-29unknown———
└ 144.121.196.240/298NET-CCF---144-121-196-240-29unknown———
└ 144.121.196.248/304NET-CCF--0-144-121-196-248-30unknown———
└ 144.121.197.0/2732NET-144-121-197-0-27unknown———
└ 144.121.197.32/298NET-144-121-197-32-29unknown———
└ 144.121.197.40/298NET-CCF---144-121-197-40-29unknown———
└ 144.121.197.56/298NET-Z-CCF-LT-288-144-121-197-56-29unknown———
└ 144.121.197.64/2816NET-144-121-197-64-28unknown———
└ 144.121.197.80/298NET-CCF---144-121-197-80-29unknown———
└ 144.121.197.88/298NET-144-121-197-88-29unknown———
└ 144.121.197.96/2816NET-Z-CCF--144-121-197-96-28unknown———
└ 144.121.197.128/2732NET-LT-183-144-121-197-128-27unknown———
└ 144.121.197.176/298NET-CCF--144-121-197-176-29unknown———
└ 144.121.197.184/304NET-CCF--144-121-197-184-30unknown———
└ 144.121.197.224/298LTF--144-121-197-224-29unknown———
└ 144.121.197.232/298NET-144-121-197-232-29unknown———
└ 144.121.197.252/304NET-Z-CCF-LT-747-144-121-197-252-30unknown———
└ 144.121.198.0/2816NET-Z-CCF--144-121-198-0-28unknown———
└ 144.121.198.16/298NET-CCF---144-121-198-16-29unknown———
└ 144.121.198.28/304NET-CCF--0-144-121-198-28-30unknown———
└ 144.121.198.40/304NET-CCF--144-121-198-40-30unknown———
└ 144.121.198.48/2816NET-SD-51289-144-121-198-48-28unknown———
└ 144.121.198.64/298NET-CCF--0-144-121-198-64-29unknown———
└ 144.121.198.96/298NET-LT-717-144-121-198-96-29unknown———
└ 144.121.198.104/298NET-CCF--0-144-121-198-104-29unknown———
└ 144.121.198.120/298NET-144-121-198-120-29unknown———
└ 144.121.198.128/2816NET-144-121-198-128-28unknown———
└ 144.121.198.144/304NET-CCF--0-144-121-198-144-30unknown———
└ 144.121.198.148/304NET-CCF--0-144-121-198-148-30unknown———
└ 144.121.198.152/298NET-144-121-198-152-29unknown———
└ 144.121.198.160/2816NET-0-144-121-198-160-28unknown———
└ 144.121.198.176/298NET-CCF--144-121-198-176-29unknown———
└ 144.121.198.184/298NET-CCF--0-144-121-198-184-29unknown———
└ 144.121.198.192/2816NET-144-121-198-192-28unknown———
└ 144.121.198.212/304NET-CCF-LT-224-144-121-198-212-30unknown———
└ 144.121.198.216/304NET-CCF-0-144-121-198-216-30unknown———
└ 144.121.198.224/298NET-CCF-LT-063-144-121-198-224-29unknown———
└ 144.121.198.232/298NET-CCF---144-121-198-232-29unknown———
└ 144.121.198.248/298LTF-0-144-121-198-248-29unknown———
└ 144.121.199.0/2816NET-CCF--144-121-199-0-28unknown———
└ 144.121.199.16/2816NET-CCF---144-121-199-16-28unknown———
└ 144.121.199.32/298NET-CCF-0-144-121-199-32-29unknown———
└ 144.121.199.40/304NET-CCF--144-121-199-40-30unknown———
└ 144.121.199.44/304NET-CCF--0-144-121-199-44-30unknown———
└ 144.121.199.48/298NET-CCF--144-121-199-48-29unknown———
└ 144.121.199.56/298NET-CCF---144-121-199-56-29unknown———
└ 144.121.199.80/298NET-CCF---144-121-199-80-29unknown———
└ 144.121.199.88/298NET-CCF-LT-063-144-121-199-88-29unknown———
└ 144.121.199.96/298NET-CCF--0-144-121-199-96-29unknown———
└ 144.121.199.104/298NET-CCF--0-144-121-199-104-29unknown———
└ 144.121.199.116/304NET-CCF--144-121-199-116-30unknown———
└ 144.121.199.120/298NET-144-121-199-120-29unknown———
└ 144.121.199.136/298NET-CCF--144-121-199-136-29unknown———
└ 144.121.199.152/304NET-CCF-0-144-121-199-152-30unknown———
└ 144.121.199.160/2816LTF--144-121-199-160-28unknown———
└ 144.121.199.176/298NET-CCF---144-121-199-176-29unknown———
└ 144.121.199.188/304NET-Z-CCF-0-144-121-199-188-30unknown———
└ 144.121.199.192/298NET-CCF-LT-063-144-121-199-192-29unknown———
└ 144.121.199.200/298NET-CCF-LT-063-144-121-199-200-29unknown———
└ 144.121.199.224/298NET-144-121-199-224-29unknown———
└ 144.121.199.232/298NET-CCF--144-121-199-232-29unknown———
└ 144.121.199.240/304NET-CCF---144-121-199-240-30unknown———

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