Data as of Nov 8, 2026
144.121.21.0/24
1 residential-proxy exit · 30 daysCrown Castle Fiber LLC · space held by Zayo Bandwidth
Residential-proxy exits
Proxy exits
1
0.39% of its addresses · 30 days
Providers
4
selling exits here
Oct 9, 2026 – Nov 7, 2026
Exits seen per day
5 observations
Proxy providers listing exits
- B2Proxy
- IPPeak
- LudaxProxy
- RainProxy
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 144.121.0.0/18 since Aug 2016 | AS46887 | Internet provider | 16 3 always on | Zayo Bandwidth | |
| 144.121.0.0/16 since Nov 2021 | AS46887 | Internet provider | 132 25 always on | Zayo Bandwidth |
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 144.121.0.0/16 | 65,536 | ZAYO-CCF-144-121-0-0 | Zayo Bandwidth (ZAYOB) · US | Direct Allocation | Apr 29, 2016 | abuse@ |
| └ 144.121.21.8/29 | 8 | NET-CCF--144-121-21-8-29 | unknown | — | — | — |
| └ 144.121.21.16/28 | 16 | NET-144-121-21-16-28 | unknown | — | — | — |
| └ 144.121.21.32/29 | 8 | NET-CCF--144-121-21-32-29 | unknown | — | — | — |
| └ 144.121.21.44/30 | 4 | NET-CCF--144-121-21-44-30 | unknown | — | — | — |
| └ 144.121.21.64/27 | 32 | NET-144-121-21-64-27 | unknown | — | — | — |
| └ 144.121.21.96/29 | 8 | NET-CCF--144-121-21-96-29 | unknown | — | — | — |
| └ 144.121.21.112/29 | 8 | LTF-0-144-121-21-112-29 | unknown | — | — | — |
| └ 144.121.21.124/30 | 4 | NET-Z-CCF-0-144-121-21-124-30 | unknown | — | — | — |
| └ 144.121.21.128/29 | 8 | NET-CCF--144-121-21-128-29 | unknown | — | — | — |
| └ 144.121.21.140/30 | 4 | NET-CCF-0-144-121-21-140-30 | unknown | — | — | — |
| └ 144.121.21.144/28 | 16 | NET-Z-CCF-LT-614-144-121-21-144-28 | unknown | — | — | — |
| └ 144.121.21.160/28 | 16 | NET-LT-785-144-121-21-160-28 | unknown | — | — | — |
| └ 144.121.21.184/29 | 8 | NET-CCF--144-121-21-184-29 | unknown | — | — | — |
| └ 144.121.21.200/30 | 4 | NET-Z-CCF-0-144-121-21-200-30 | unknown | — | — | — |
| └ 144.121.21.224/30 | 4 | NET-CCF-0-144-121-21-224-30 | unknown | — | — | — |
| └ 144.121.21.232/30 | 4 | NET-CCF--144-121-21-232-30 | unknown | — | — | — |
| └ 144.121.21.248/29 | 8 | LTF--144-121-21-248-29 | unknown | — | — | — |
Network & registry
Announced by
Covering announcement 144.121.20.0/22
- Prefix
- 144.121.20.0/22
- Announced by
- AS46887 Crown Castle Fiber LLC
- Type
- Internet provider
- Proxy exits
- 1
- RPKI
- No RPKI
- Netname
- ZAYO-CCF-144-121-0-0
- Registrant
- Zayo Bandwidth
- RIR
- ARIN
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
Routing timeline
Covering aggregate above, the prefix's own history below
144.121.20.0/22
Routing history
- Pattern
- Stable
- First seen
- Dec 2025
- Current origin since
- Dec 2025 · 11 mo
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 144.
121. 0. 0/ 16 - Netname
- ZAYO-CCF-144-121-0-0
- Registrant
- Zayo Bandwidth
- Organization
- Zayo Bandwidth (ZAYOB)
- Org address
- 1401 Wynkoop St., Denver, CO, 80202
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-144-121-0-0-1
- Parent
- NET-144-0-0-0-0
- Created
- Apr 29, 2016
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 29, 2016
- Status
- assigned
Report abuse
Abuse contact
- abuse@
zayo. com - Name
- Abuse
- Phone
- +1-866-236-2824
- Handle
- ABUSE5675-ARIN