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Data as of Nov 7, 2026

144.121.44.0/22

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
144.121.0.0/18
since Aug 2016
AS46887Internet provider17
3 always on
Zayo Bandwidth
144.121.0.0/16
since Nov 2021
AS46887Internet provider134
24 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
└ 144.121.44.0/304NET-CCF--0-144-121-44-0-30unknown———
└ 144.121.44.4/304NET-CCF--0-144-121-44-4-30unknown———
└ 144.121.44.8/304NET-CCF--0-144-121-44-8-30unknown———
└ 144.121.44.12/304NET-CCF---144-121-44-12-30unknown———
└ 144.121.44.16/304NET-CCF---144-121-44-16-30unknown———
└ 144.121.44.20/304NET-CCF---144-121-44-20-30unknown———
└ 144.121.44.24/304NET-CCF--0-144-121-44-24-30unknown———
└ 144.121.44.28/304NET-CCF--SD-51159-144-121-44-28-30unknown———
└ 144.121.44.32/2816NET-CCF--0-144-121-44-32-28unknown———
└ 144.121.44.48/298NET-CCF--SD-51159-144-121-44-48-29unknown———
└ 144.121.44.56/298NET-CCF--0-144-121-44-56-29unknown———
└ 144.121.44.64/2732NET-CCF--144-121-44-64-27unknown———
└ 144.121.44.96/2732NET-CCF-0-144-121-44-96-27unknown———
└ 144.121.44.128/298LTF--144-121-44-128-29unknown———
└ 144.121.44.144/298LTF--144-121-44-144-29unknown———
└ 144.121.44.152/298NET-144-121-44-152-29unknown———
└ 144.121.44.160/298LTF--144-121-44-160-29unknown———
└ 144.121.44.168/298LTF-LT-625-144-121-44-168-29unknown———
└ 144.121.44.176/2816NET-CCF---144-121-44-176-28unknown———
└ 144.121.44.192/298NET-CCF---144-121-44-192-29unknown———
└ 144.121.44.200/298NET-CCF--0-144-121-44-200-29unknown———
└ 144.121.44.208/298NET-CCF-144-121-44-208-29unknown———
└ 144.121.44.216/298NET-CCF---144-121-44-216-29unknown———
└ 144.121.44.224/298NET-144-121-44-224-29unknown———
└ 144.121.44.232/298LTF--144-121-44-232-29unknown———
└ 144.121.44.240/298NET-CCF--SD-51159-144-121-44-240-29unknown———
└ 144.121.44.248/298LTF--144-121-44-248-29unknown———
└ 144.121.45.0/298NET-Z-CCF--144-121-45-0-29unknown———
└ 144.121.45.8/298NET-Z-CCF--144-121-45-8-29unknown———
└ 144.121.45.16/298NET-Z-CCF-0-144-121-45-16-29unknown———
└ 144.121.45.24/298NET-Z-CCF--144-121-45-24-29unknown———
└ 144.121.45.32/298NET-CCF--LT-580-144-121-45-32-29unknown———
└ 144.121.45.40/304NET-CCF---144-121-45-40-30unknown———
└ 144.121.45.44/304NET-CCF---144-121-45-44-30unknown———
└ 144.121.45.48/2816NET-CCF--0-144-121-45-48-28unknown———
└ 144.121.45.64/298LTF--144-121-45-64-29unknown———
└ 144.121.45.72/298NET-144-121-45-72-29unknown———
└ 144.121.45.80/2816NET-144-121-45-80-28unknown———
└ 144.121.45.96/298NET-CCF---144-121-45-96-29unknown———
└ 144.121.45.104/304NET-CCF---144-121-45-104-30unknown———
└ 144.121.45.108/304NET-CCF--SD-51088-144-121-45-108-30unknown———
└ 144.121.45.112/298NET-CCF--0-144-121-45-112-29unknown———
└ 144.121.45.120/298NET-CCF---144-121-45-120-29unknown———
└ 144.121.45.128/298LTF--144-121-45-128-29unknown———
└ 144.121.45.136/298NET-CCF---144-121-45-136-29unknown———
└ 144.121.45.144/298NET-CCF---144-121-45-144-29unknown———
└ 144.121.45.152/298NET-CCF---144-121-45-152-29unknown———
└ 144.121.45.168/298NET-CCF--0-144-121-45-168-29unknown———
└ 144.121.45.176/298NET-CCF---144-121-45-176-29unknown———
└ 144.121.45.184/298NET-CCF---144-121-45-184-29unknown———
└ 144.121.45.192/298LTF--144-121-45-192-29unknown———
└ 144.121.45.200/298NET-CCF---144-121-45-200-29unknown———
└ 144.121.45.208/298NET-CCF---144-121-45-208-29unknown———
└ 144.121.45.216/298NET-CCF---144-121-45-216-29unknown———
└ 144.121.45.224/2732NET-CCF---144-121-45-224-27unknown———
└ 144.121.46.0/298NET-CCF---144-121-46-0-29unknown———
└ 144.121.46.8/298NET-CCF--LT-580-144-121-46-8-29unknown———
└ 144.121.46.16/298NET-CCF--0-144-121-46-16-29unknown———
└ 144.121.46.24/298NET-CCF---144-121-46-24-29unknown———
└ 144.121.46.32/2732NET-CCF--0-144-121-46-32-27unknown———
└ 144.121.46.64/2732NET-CCF--0-144-121-46-64-27unknown———
└ 144.121.46.96/298NET-CCF--0-144-121-46-96-29unknown———
└ 144.121.46.104/298NET-CCF---144-121-46-104-29unknown———
└ 144.121.46.112/298NET-Z-CCF--144-121-46-112-29unknown———
└ 144.121.46.120/298NET-CCF---144-121-46-120-29unknown———
└ 144.121.46.128/298LTF--144-121-46-128-29unknown———
└ 144.121.46.144/298LTF-SD-50292-144-121-46-144-29unknown———
└ 144.121.46.152/298NET-CCF---144-121-46-152-29unknown———
└ 144.121.46.160/2816LTF--144-121-46-160-28unknown———
└ 144.121.46.176/298NET-CCF---144-121-46-176-29unknown———
└ 144.121.46.184/298NET-CCF---144-121-46-184-29unknown———
└ 144.121.46.192/298NET-CCF---144-121-46-192-29unknown———
└ 144.121.46.200/304NET-CCF---144-121-46-200-30unknown———
└ 144.121.46.204/304NET-CCF--0-144-121-46-204-30unknown———
└ 144.121.46.208/298NET-CCF--0-144-121-46-208-29unknown———
└ 144.121.46.216/298NET-CCF---144-121-46-216-29unknown———
└ 144.121.46.224/298LTF--144-121-46-224-29unknown———
└ 144.121.46.232/298NET-CCF---144-121-46-232-29unknown———
└ 144.121.46.240/298LTF--144-121-46-240-29unknown———
└ 144.121.46.248/298LTF--144-121-46-248-29unknown———
└ 144.121.47.0/304NET-CCF---144-121-47-0-30unknown———
└ 144.121.47.4/304NET-CCF---144-121-47-4-30unknown———
└ 144.121.47.8/298NET-CCF---144-121-47-8-29unknown———
└ 144.121.47.16/298LTF--144-121-47-16-29unknown———
└ 144.121.47.24/298NET-CCF--0-144-121-47-24-29unknown———
└ 144.121.47.32/2732LTF-0-144-121-47-32-27unknown———
└ 144.121.47.64/298NET-CCF---144-121-47-64-29unknown———
└ 144.121.47.72/298NET-CCF---144-121-47-72-29unknown———
└ 144.121.47.80/298NET-CCF---144-121-47-80-29unknown———
└ 144.121.47.88/298NET-CCF---144-121-47-88-29unknown———
└ 144.121.47.100/304NET-CCF-0-144-121-47-100-30unknown———
└ 144.121.47.104/298NET-CCF--144-121-47-104-29unknown———
└ 144.121.47.112/2816LTF--144-121-47-112-28unknown———
└ 144.121.47.128/298NET-CCF---144-121-47-128-29unknown———
└ 144.121.47.144/2816LTF--144-121-47-144-28unknown———
└ 144.121.47.160/298NET-CCF--0-144-121-47-160-29unknown———
└ 144.121.47.168/298NET-CCF---144-121-47-168-29unknown———
└ 144.121.47.176/2816LTF-0-144-121-47-176-28unknown———
└ 144.121.47.224/298NET-CCF---144-121-47-224-29unknown———
└ 144.121.47.232/298LTF--144-121-47-232-29unknown———
└ 144.121.47.240/298NET-CCF--SD-51159-144-121-47-240-29unknown———
└ 144.121.47.248/304NET-CCF--0-144-121-47-248-30unknown———

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