Data as of Nov 9, 2026
144.121.143.0/24
No anonymizer space · no proxy exits in 30 daysCrown Castle Fiber LLC · space held by Zayo Bandwidth
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 144.121.128.0/19 since Jun 2016 | AS46887 | Internet provider | 13 2 always on | Zayo Bandwidth | |
| 144.121.0.0/16 since Nov 2021 | AS46887 | Internet provider | 129 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.
| 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@ |
| └ 144.121.143.32/28 | 16 | NET-144-121-143-32-28 | unknown | — | — | — |
| └ 144.121.143.48/29 | 8 | LTF--144-121-143-48-29 | unknown | — | — | — |
| └ 144.121.143.56/29 | 8 | LTF--144-121-143-56-29 | unknown | — | — | — |
| └ 144.121.143.144/28 | 16 | NET-144-121-143-144-28 | unknown | — | — | — |
| └ 144.121.143.168/29 | 8 | NET-144-121-143-168-29 | unknown | — | — | — |
| └ 144.121.143.200/29 | 8 | NET-144-121-143-200-29 | unknown | — | — | — |
| └ 144.121.143.216/29 | 8 | LTF--144-121-143-216-29 | unknown | — | — | — |
| └ 144.121.143.224/27 | 32 | LTF--144-121-143-224-27 | unknown | — | — | — |
Network & registry
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
Summary
Routing history
- Pattern
- Stable
- First seen
- Nov 2021
- Current origin since
- Nov 2021 · 5.0 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS46887 | RADB | Crown Castle Fiber LLC | MAINT-AS27506 | May 23, 2025 |
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